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| -rw-r--r-- | 3rdparty/clipp.h | 7024 | ||||
| -rw-r--r-- | tools/hscript-validate/validator.cc | 28 |
2 files changed, 7046 insertions, 6 deletions
diff --git a/3rdparty/clipp.h b/3rdparty/clipp.h new file mode 100644 index 0000000..d7b101e --- /dev/null +++ b/3rdparty/clipp.h @@ -0,0 +1,7024 @@ +/***************************************************************************** + * ___ _ _ ___ ___ + * | _|| | | | | _ \ _ \ CLIPP - command line interfaces for modern C++ + * | |_ | |_ | | | _/ _/ version 1.2.3 + * |___||___||_| |_| |_| https://github.com/muellan/clipp + * + * Licensed under the MIT License <http://opensource.org/licenses/MIT>. + * Copyright (c) 2017-2018 André Müller <foss@andremueller-online.de> + * + * --------------------------------------------------------------------------- + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + *****************************************************************************/ + +#ifndef AM_CLIPP_H__ +#define AM_CLIPP_H__ + +#include <cstring> +#include <string> +#include <cstdlib> +#include <cstring> +#include <cctype> +#include <memory> +#include <vector> +#include <limits> +#include <stack> +#include <algorithm> +#include <sstream> +#include <utility> +#include <iterator> +#include <functional> + + +/*************************************************************************//** + * + * @brief primary namespace + * + *****************************************************************************/ +namespace clipp { + + + +/***************************************************************************** + * + * basic constants and datatype definitions + * + *****************************************************************************/ +using arg_index = int; + +using arg_string = std::string; +using doc_string = std::string; + +using arg_list = std::vector<arg_string>; + + + +/*************************************************************************//** + * + * @brief tristate + * + *****************************************************************************/ +enum class tri : char { no, yes, either }; + +inline constexpr bool operator == (tri t, bool b) noexcept { + return b ? t != tri::no : t != tri::yes; +} +inline constexpr bool operator == (bool b, tri t) noexcept { return (t == b); } +inline constexpr bool operator != (tri t, bool b) noexcept { return !(t == b); } +inline constexpr bool operator != (bool b, tri t) noexcept { return !(t == b); } + + + +/*************************************************************************//** + * + * @brief (start,size) index range + * + *****************************************************************************/ +class subrange { +public: + using size_type = arg_string::size_type; + + /** @brief default: no match */ + explicit constexpr + subrange() noexcept : + at_{arg_string::npos}, length_{0} + {} + + /** @brief match length & position within subject string */ + explicit constexpr + subrange(size_type pos, size_type len) noexcept : + at_{pos}, length_{len} + {} + + /** @brief position of the match within the subject string */ + constexpr size_type at() const noexcept { return at_; } + /** @brief length of the matching subsequence */ + constexpr size_type length() const noexcept { return length_; } + + /** @brief returns true, if query string is a prefix of the subject string */ + constexpr bool prefix() const noexcept { + return at_ == 0; + } + + /** @brief returns true, if query is a substring of the query string */ + constexpr explicit operator bool () const noexcept { + return at_ != arg_string::npos; + } + +private: + size_type at_; + size_type length_; +}; + + + +/*************************************************************************//** + * + * @brief match predicates + * + *****************************************************************************/ +using match_predicate = std::function<bool(const arg_string&)>; +using match_function = std::function<subrange(const arg_string&)>; + + + + + + +/*************************************************************************//** + * + * @brief type traits (NOT FOR DIRECT USE IN CLIENT CODE!) + * no interface guarantees; might be changed or removed in the future + * + *****************************************************************************/ +namespace traits { + +/*************************************************************************//** + * + * @brief function (class) signature type trait + * + *****************************************************************************/ +template<class Fn, class Ret, class... Args> +constexpr auto +check_is_callable(int) -> decltype( + std::declval<Fn>()(std::declval<Args>()...), + std::integral_constant<bool, + std::is_same<Ret,typename std::result_of<Fn(Args...)>::type>::value>{} ); + +template<class,class,class...> +constexpr auto +check_is_callable(long) -> std::false_type; + +template<class Fn, class Ret> +constexpr auto +check_is_callable_without_arg(int) -> decltype( + std::declval<Fn>()(), + std::integral_constant<bool, + std::is_same<Ret,typename std::result_of<Fn()>::type>::value>{} ); + +template<class,class> +constexpr auto +check_is_callable_without_arg(long) -> std::false_type; + + + +template<class Fn, class... Args> +constexpr auto +check_is_void_callable(int) -> decltype( + std::declval<Fn>()(std::declval<Args>()...), std::true_type{}); + +template<class,class,class...> +constexpr auto +check_is_void_callable(long) -> std::false_type; + +template<class Fn> +constexpr auto +check_is_void_callable_without_arg(int) -> decltype( + std::declval<Fn>()(), std::true_type{}); + +template<class> +constexpr auto +check_is_void_callable_without_arg(long) -> std::false_type; + + + +template<class Fn, class Ret> +struct is_callable; + + +template<class Fn, class Ret, class... Args> +struct is_callable<Fn, Ret(Args...)> : + decltype(check_is_callable<Fn,Ret,Args...>(0)) +{}; + +template<class Fn, class Ret> +struct is_callable<Fn,Ret()> : + decltype(check_is_callable_without_arg<Fn,Ret>(0)) +{}; + + +template<class Fn, class... Args> +struct is_callable<Fn, void(Args...)> : + decltype(check_is_void_callable<Fn,Args...>(0)) +{}; + +template<class Fn> +struct is_callable<Fn,void()> : + decltype(check_is_void_callable_without_arg<Fn>(0)) +{}; + + + +/*************************************************************************//** + * + * @brief input range type trait + * + *****************************************************************************/ +template<class T> +constexpr auto +check_is_input_range(int) -> decltype( + begin(std::declval<T>()), end(std::declval<T>()), + std::true_type{}); + +template<class T> +constexpr auto +check_is_input_range(char) -> decltype( + std::begin(std::declval<T>()), std::end(std::declval<T>()), + std::true_type{}); + +template<class> +constexpr auto +check_is_input_range(long) -> std::false_type; + +template<class T> +struct is_input_range : + decltype(check_is_input_range<T>(0)) +{}; + + + +/*************************************************************************//** + * + * @brief size() member type trait + * + *****************************************************************************/ +template<class T> +constexpr auto +check_has_size_getter(int) -> + decltype(std::declval<T>().size(), std::true_type{}); + +template<class> +constexpr auto +check_has_size_getter(long) -> std::false_type; + +template<class T> +struct has_size_getter : + decltype(check_has_size_getter<T>(0)) +{}; + +} // namespace traits + + + + + + +/*************************************************************************//** + * + * @brief helpers (NOT FOR DIRECT USE IN CLIENT CODE!) + * no interface guarantees; might be changed or removed in the future + * + *****************************************************************************/ +namespace detail { + + +/*************************************************************************//** + * @brief forwards string to first non-whitespace char; + * std string -> unsigned conv yields max value, but we want 0; + * also checks for nullptr + *****************************************************************************/ +inline bool +fwd_to_unsigned_int(const char*& s) +{ + if(!s) return false; + for(; std::isspace(*s); ++s); + if(!s[0] || s[0] == '-') return false; + if(s[0] == '-') return false; + return true; +} + + +/*************************************************************************//** + * + * @brief value limits clamping + * + *****************************************************************************/ +template<class T, class V, bool = (sizeof(V) > sizeof(T))> +struct limits_clamped { + static T from(const V& v) { + if(v >= V(std::numeric_limits<T>::max())) { + return std::numeric_limits<T>::max(); + } + if(v <= V(std::numeric_limits<T>::lowest())) { + return std::numeric_limits<T>::lowest(); + } + return T(v); + } +}; + +template<class T, class V> +struct limits_clamped<T,V,false> { + static T from(const V& v) { return T(v); } +}; + + +/*************************************************************************//** + * + * @brief returns value of v as a T, clamped at T's maximum + * + *****************************************************************************/ +template<class T, class V> +inline T clamped_on_limits(const V& v) { + return limits_clamped<T,V>::from(v); +} + + + + +/*************************************************************************//** + * + * @brief type conversion helpers + * + *****************************************************************************/ +template<class T> +struct make { + static inline T from(const char* s) { + if(!s) return false; + //a conversion from const char* to / must exist + return static_cast<T>(s); + } +}; + +template<> +struct make<bool> { + static inline bool from(const char* s) { + if(!s) return false; + return static_cast<bool>(s); + } +}; + +template<> +struct make<unsigned char> { + static inline unsigned char from(const char* s) { + if(!fwd_to_unsigned_int(s)) return (0); + return clamped_on_limits<unsigned char>(std::strtoull(s,nullptr,10)); + } +}; + +template<> +struct make<unsigned short int> { + static inline unsigned short int from(const char* s) { + if(!fwd_to_unsigned_int(s)) return (0); + return clamped_on_limits<unsigned short int>(std::strtoull(s,nullptr,10)); + } +}; + +template<> +struct make<unsigned int> { + static inline unsigned int from(const char* s) { + if(!fwd_to_unsigned_int(s)) return (0); + return clamped_on_limits<unsigned int>(std::strtoull(s,nullptr,10)); + } +}; + +template<> +struct make<unsigned long int> { + static inline unsigned long int from(const char* s) { + if(!fwd_to_unsigned_int(s)) return (0); + return clamped_on_limits<unsigned long int>(std::strtoull(s,nullptr,10)); + } +}; + +template<> +struct make<unsigned long long int> { + static inline unsigned long long int from(const char* s) { + if(!fwd_to_unsigned_int(s)) return (0); + return clamped_on_limits<unsigned long long int>(std::strtoull(s,nullptr,10)); + } +}; + +template<> +struct make<char> { + static inline char from(const char* s) { + //parse as single character? + const auto n = std::strlen(s); + if(n == 1) return s[0]; + //parse as integer + return clamped_on_limits<char>(std::strtoll(s,nullptr,10)); + } +}; + +template<> +struct make<short int> { + static inline short int from(const char* s) { + return clamped_on_limits<short int>(std::strtoll(s,nullptr,10)); + } +}; + +template<> +struct make<int> { + static inline int from(const char* s) { + return clamped_on_limits<int>(std::strtoll(s,nullptr,10)); + } +}; + +template<> +struct make<long int> { + static inline long int from(const char* s) { + return clamped_on_limits<long int>(std::strtoll(s,nullptr,10)); + } +}; + +template<> +struct make<long long int> { + static inline long long int from(const char* s) { + return (std::strtoll(s,nullptr,10)); + } +}; + +template<> +struct make<float> { + static inline float from(const char* s) { + return (std::strtof(s,nullptr)); + } +}; + +template<> +struct make<double> { + static inline double from(const char* s) { + return (std::strtod(s,nullptr)); + } +}; + +template<> +struct make<long double> { + static inline long double from(const char* s) { + return (std::strtold(s,nullptr)); + } +}; + +template<> +struct make<std::string> { + static inline std::string from(const char* s) { + return std::string(s); + } +}; + + + +/*************************************************************************//** + * + * @brief assigns boolean constant to one or multiple target objects + * + *****************************************************************************/ +template<class T, class V = T> +class assign_value +{ +public: + template<class X> + explicit constexpr + assign_value(T& target, X&& value) noexcept : + t_{std::addressof(target)}, v_{std::forward<X>(value)} + {} + + void operator () () const { + if(t_) *t_ = v_; + } + +private: + T* t_; + V v_; +}; + + + +/*************************************************************************//** + * + * @brief flips bools + * + *****************************************************************************/ +class flip_bool +{ +public: + explicit constexpr + flip_bool(bool& target) noexcept : + b_{&target} + {} + + void operator () () const { + if(b_) *b_ = !*b_; + } + +private: + bool* b_; +}; + + + +/*************************************************************************//** + * + * @brief increments using operator ++ + * + *****************************************************************************/ +template<class T> +class increment +{ +public: + explicit constexpr + increment(T& target) noexcept : t_{std::addressof(target)} {} + + void operator () () const { + if(t_) ++(*t_); + } + +private: + T* t_; +}; + + + +/*************************************************************************//** + * + * @brief decrements using operator -- + * + *****************************************************************************/ +template<class T> +class decrement +{ +public: + explicit constexpr + decrement(T& target) noexcept : t_{std::addressof(target)} {} + + void operator () () const { + if(t_) --(*t_); + } + +private: + T* t_; +}; + + + +/*************************************************************************//** + * + * @brief increments by a fixed amount using operator += + * + *****************************************************************************/ +template<class T> +class increment_by +{ +public: + explicit constexpr + increment_by(T& target, T by) noexcept : + t_{std::addressof(target)}, by_{std::move(by)} + {} + + void operator () () const { + if(t_) (*t_) += by_; + } + +private: + T* t_; + T by_; +}; + + + + +/*************************************************************************//** + * + * @brief makes a value from a string and assigns it to an object + * + *****************************************************************************/ +template<class T> +class map_arg_to +{ +public: + explicit constexpr + map_arg_to(T& target) noexcept : t_{std::addressof(target)} {} + + void operator () (const char* s) const { + if(t_ && s) *t_ = detail::make<T>::from(s); + } + +private: + T* t_; +}; + + +//------------------------------------------------------------------- +/** + * @brief specialization for vectors: append element + */ +template<class T> +class map_arg_to<std::vector<T>> +{ +public: + map_arg_to(std::vector<T>& target): t_{std::addressof(target)} {} + + void operator () (const char* s) const { + if(t_ && s) t_->push_back(detail::make<T>::from(s)); + } + +private: + std::vector<T>* t_; +}; + + +//------------------------------------------------------------------- +/** + * @brief specialization for bools: + * set to true regardless of string content + */ +template<> +class map_arg_to<bool> +{ +public: + map_arg_to(bool& target): t_{&target} {} + + void operator () (const char* s) const { + if(t_ && s) *t_ = true; + } + +private: + bool* t_; +}; + + +} // namespace detail + + + + + + +/*************************************************************************//** + * + * @brief string matching and processing tools + * + *****************************************************************************/ + +namespace str { + + +/*************************************************************************//** + * + * @brief converts string to value of target type 'T' + * + *****************************************************************************/ +template<class T> +T make(const arg_string& s) +{ + return detail::make<T>::from(s); +} + + + +/*************************************************************************//** + * + * @brief removes trailing whitespace from string + * + *****************************************************************************/ +template<class C, class T, class A> +inline void +trimr(std::basic_string<C,T,A>& s) +{ + if(s.empty()) return; + + s.erase( + std::find_if_not(s.rbegin(), s.rend(), + [](char c) { return std::isspace(c);} ).base(), + s.end() ); +} + + +/*************************************************************************//** + * + * @brief removes leading whitespace from string + * + *****************************************************************************/ +template<class C, class T, class A> +inline void +triml(std::basic_string<C,T,A>& s) +{ + if(s.empty()) return; + + s.erase( + s.begin(), + std::find_if_not(s.begin(), s.end(), + [](char c) { return std::isspace(c);}) + ); +} + + +/*************************************************************************//** + * + * @brief removes leading and trailing whitespace from string + * + *****************************************************************************/ +template<class C, class T, class A> +inline void +trim(std::basic_string<C,T,A>& s) +{ + triml(s); + trimr(s); +} + + +/*************************************************************************//** + * + * @brief removes all whitespaces from string + * + *****************************************************************************/ +template<class C, class T, class A> +inline void +remove_ws(std::basic_string<C,T,A>& s) +{ + if(s.empty()) return; + + s.erase(std::remove_if(s.begin(), s.end(), + [](char c) { return std::isspace(c); }), + s.end() ); +} + + +/*************************************************************************//** + * + * @brief returns true, if the 'prefix' argument + * is a prefix of the 'subject' argument + * + *****************************************************************************/ +template<class C, class T, class A> +inline bool +has_prefix(const std::basic_string<C,T,A>& subject, + const std::basic_string<C,T,A>& prefix) +{ + if(prefix.size() > subject.size()) return false; + return subject.find(prefix) == 0; +} + + +/*************************************************************************//** + * + * @brief returns true, if the 'postfix' argument + * is a postfix of the 'subject' argument + * + *****************************************************************************/ +template<class C, class T, class A> +inline bool +has_postfix(const std::basic_string<C,T,A>& subject, + const std::basic_string<C,T,A>& postfix) +{ + if(postfix.size() > subject.size()) return false; + return (subject.size() - postfix.size()) == subject.find(postfix); +} + + + +/*************************************************************************//** +* +* @brief returns longest common prefix of several +* sequential random access containers +* +* @details InputRange require begin and end (member functions or overloads) +* the elements of InputRange require a size() member +* +*****************************************************************************/ +template<class InputRange> +auto +longest_common_prefix(const InputRange& strs) + -> typename std::decay<decltype(*begin(strs))>::type +{ + static_assert(traits::is_input_range<InputRange>(), + "parameter must satisfy the InputRange concept"); + + static_assert(traits::has_size_getter< + typename std::decay<decltype(*begin(strs))>::type>(), + "elements of input range must have a ::size() member function"); + + using std::begin; + using std::end; + + using item_t = typename std::decay<decltype(*begin(strs))>::type; + using str_size_t = typename std::decay<decltype(begin(strs)->size())>::type; + + const auto n = size_t(distance(begin(strs), end(strs))); + if(n < 1) return item_t(""); + if(n == 1) return *begin(strs); + + //length of shortest string + auto m = std::min_element(begin(strs), end(strs), + [](const item_t& a, const item_t& b) { + return a.size() < b.size(); })->size(); + + //check each character until we find a mismatch + for(str_size_t i = 0; i < m; ++i) { + for(str_size_t j = 1; j < n; ++j) { + if(strs[j][i] != strs[j-1][i]) + return strs[0].substr(0, i); + } + } + return strs[0].substr(0, m); +} + + + +/*************************************************************************//** + * + * @brief returns longest substring range that could be found in 'arg' + * + * @param arg string to be searched in + * @param substrings range of candidate substrings + * + *****************************************************************************/ +template<class C, class T, class A, class InputRange> +subrange +longest_substring_match(const std::basic_string<C,T,A>& arg, + const InputRange& substrings) +{ + using string_t = std::basic_string<C,T,A>; + + static_assert(traits::is_input_range<InputRange>(), + "parameter must satisfy the InputRange concept"); + + static_assert(std::is_same<string_t, + typename std::decay<decltype(*begin(substrings))>::type>(), + "substrings must have same type as 'arg'"); + + auto i = string_t::npos; + auto n = string_t::size_type(0); + for(const auto& s : substrings) { + auto j = arg.find(s); + if(j != string_t::npos && s.size() > n) { + i = j; + n = s.size(); + } + } + return subrange{i,n}; +} + + + +/*************************************************************************//** + * + * @brief returns longest prefix range that could be found in 'arg' + * + * @param arg string to be searched in + * @param prefixes range of candidate prefix strings + * + *****************************************************************************/ +template<class C, class T, class A, class InputRange> +subrange +longest_prefix_match(const std::basic_string<C,T,A>& arg, + const InputRange& prefixes) +{ + using string_t = std::basic_string<C,T,A>; + using s_size_t = typename string_t::size_type; + + static_assert(traits::is_input_range<InputRange>(), + "parameter must satisfy the InputRange concept"); + + static_assert(std::is_same<string_t, + typename std::decay<decltype(*begin(prefixes))>::type>(), + "prefixes must have same type as 'arg'"); + + auto i = string_t::npos; + auto n = s_size_t(0); + for(const auto& s : prefixes) { + auto j = arg.find(s); + if(j == 0 && s.size() > n) { + i = 0; + n = s.size(); + } + } + return subrange{i,n}; +} + + + +/*************************************************************************//** + * + * @brief returns the first occurrence of 'query' within 'subject' + * + *****************************************************************************/ +template<class C, class T, class A> +inline subrange +substring_match(const std::basic_string<C,T,A>& subject, + const std::basic_string<C,T,A>& query) +{ + if(subject.empty() && query.empty()) return subrange(0,0); + if(subject.empty() || query.empty()) return subrange{}; + auto i = subject.find(query); + if(i == std::basic_string<C,T,A>::npos) return subrange{}; + return subrange{i,query.size()}; +} + + + +/*************************************************************************//** + * + * @brief returns first substring match (pos,len) within the input string + * that represents a number + * (with at maximum one decimal point and digit separators) + * + *****************************************************************************/ +template<class C, class T, class A> +subrange +first_number_match(std::basic_string<C,T,A> s, + C digitSeparator = C(','), + C decimalPoint = C('.'), + C exponential = C('e')) +{ + using string_t = std::basic_string<C,T,A>; + + str::trim(s); + if(s.empty()) return subrange{}; + + auto i = s.find_first_of("0123456789+-"); + if(i == string_t::npos) { + i = s.find(decimalPoint); + if(i == string_t::npos) return subrange{}; + } + + bool point = false; + bool sep = false; + auto exp = string_t::npos; + auto j = i + 1; + for(; j < s.size(); ++j) { + if(s[j] == digitSeparator) { + if(!sep) sep = true; else break; + } + else { + sep = false; + if(s[j] == decimalPoint) { + //only one decimal point before exponent allowed + if(!point && exp == string_t::npos) point = true; else break; + } + else if(std::tolower(s[j]) == std::tolower(exponential)) { + //only one exponent separator allowed + if(exp == string_t::npos) exp = j; else break; + } + else if(exp != string_t::npos && (exp+1) == j) { + //only sign or digit after exponent separator + if(s[j] != '+' && s[j] != '-' && !std::isdigit(s[j])) break; + } + else if(!std::isdigit(s[j])) { + break; + } + } + } + + //if length == 1 then must be a digit + if(j-i == 1 && !std::isdigit(s[i])) return subrange{}; + + return subrange{i,j-i}; +} + + + +/*************************************************************************//** + * + * @brief returns first substring match (pos,len) + * that represents an integer (with optional digit separators) + * + *****************************************************************************/ +template<class C, class T, class A> +subrange +first_integer_match(std::basic_string<C,T,A> s, + C digitSeparator = C(',')) +{ + using string_t = std::basic_string<C,T,A>; + + str::trim(s); + if(s.empty()) return subrange{}; + + auto i = s.find_first_of("0123456789+-"); + if(i == string_t::npos) return subrange{}; + + bool sep = false; + auto j = i + 1; + for(; j < s.size(); ++j) { + if(s[j] == digitSeparator) { + if(!sep) sep = true; else break; + } + else { + sep = false; + if(!std::isdigit(s[j])) break; + } + } + + //if length == 1 then must be a digit + if(j-i == 1 && !std::isdigit(s[i])) return subrange{}; + + return subrange{i,j-i}; +} + + + +/*************************************************************************//** + * + * @brief returns true if candidate string represents a number + * + *****************************************************************************/ +template<class C, class T, class A> +bool represents_number(const std::basic_string<C,T,A>& candidate, + C digitSeparator = C(','), + C decimalPoint = C('.'), + C exponential = C('e')) +{ + const auto match = str::first_number_match(candidate, digitSeparator, + decimalPoint, exponential); + + return (match && match.length() == candidate.size()); +} + + + +/*************************************************************************//** + * + * @brief returns true if candidate string represents an integer + * + *****************************************************************************/ +template<class C, class T, class A> +bool represents_integer(const std::basic_string<C,T,A>& candidate, + C digitSeparator = C(',')) +{ + const auto match = str::first_integer_match(candidate, digitSeparator); + return (match && match.length() == candidate.size()); +} + +} // namespace str + + + + + + +/*************************************************************************//** + * + * @brief makes function object with a const char* parameter + * that assigns a value to a ref-captured object + * + *****************************************************************************/ +template<class T, class V> +inline detail::assign_value<T,V> +set(T& target, V value) { + return detail::assign_value<T>{target, std::move(value)}; +} + + + +/*************************************************************************//** + * + * @brief makes parameter-less function object + * that assigns value(s) to a ref-captured object; + * value(s) are obtained by converting the const char* argument to + * the captured object types; + * bools are always set to true if the argument is not nullptr + * + *****************************************************************************/ +template<class T> +inline detail::map_arg_to<T> +set(T& target) { + return detail::map_arg_to<T>{target}; +} + + + +/*************************************************************************//** + * + * @brief makes function object that sets a bool to true + * + *****************************************************************************/ +inline detail::assign_value<bool> +set(bool& target) { + return detail::assign_value<bool>{target,true}; +} + +/*************************************************************************//** + * + * @brief makes function object that sets a bool to false + * + *****************************************************************************/ +inline detail::assign_value<bool> +unset(bool& target) { + return detail::assign_value<bool>{target,false}; +} + +/*************************************************************************//** + * + * @brief makes function object that flips the value of a ref-captured bool + * + *****************************************************************************/ +inline detail::flip_bool +flip(bool& b) { + return detail::flip_bool(b); +} + + + + + +/*************************************************************************//** + * + * @brief makes function object that increments using operator ++ + * + *****************************************************************************/ +template<class T> +inline detail::increment<T> +increment(T& target) { + return detail::increment<T>{target}; +} + +/*************************************************************************//** + * + * @brief makes function object that decrements using operator -- + * + *****************************************************************************/ +template<class T> +inline detail::increment_by<T> +increment(T& target, T by) { + return detail::increment_by<T>{target, std::move(by)}; +} + +/*************************************************************************//** + * + * @brief makes function object that increments by a fixed amount using operator += + * + *****************************************************************************/ +template<class T> +inline detail::decrement<T> +decrement(T& target) { + return detail::decrement<T>{target}; +} + + + + + + +/*************************************************************************//** + * + * @brief helpers (NOT FOR DIRECT USE IN CLIENT CODE!) + * + *****************************************************************************/ +namespace detail { + + +/*************************************************************************//** + * + * @brief mixin that provides action definition and execution + * + *****************************************************************************/ +template<class Derived> +class action_provider +{ +private: + //--------------------------------------------------------------- + using simple_action = std::function<void()>; + using arg_action = std::function<void(const char*)>; + using index_action = std::function<void(int)>; + + //----------------------------------------------------- + class simple_action_adapter { + public: + simple_action_adapter() = default; + simple_action_adapter(const simple_action& a): action_(a) {} + simple_action_adapter(simple_action&& a): action_(std::move(a)) {} + void operator() (const char*) const { action_(); } + void operator() (int) const { action_(); } + private: + simple_action action_; + }; + + +public: + //--------------------------------------------------------------- + /** @brief adds an action that has an operator() that is callable + * with a 'const char*' argument */ + Derived& + call(arg_action a) { + argActions_.push_back(std::move(a)); + return *static_cast<Derived*>(this); + } + + /** @brief adds an action that has an operator()() */ + Derived& + call(simple_action a) { + argActions_.push_back(simple_action_adapter(std::move(a))); + return *static_cast<Derived*>(this); + } + + /** @brief adds an action that has an operator() that is callable + * with a 'const char*' argument */ + Derived& operator () (arg_action a) { return call(std::move(a)); } + + /** @brief adds an action that has an operator()() */ + Derived& operator () (simple_action a) { return call(std::move(a)); } + + + //--------------------------------------------------------------- + /** @brief adds an action that will set the value of 't' from + * a 'const char*' arg */ + template<class Target> + Derived& + set(Target& t) { + static_assert(!std::is_pointer<Target>::value, + "parameter target type must not be a pointer"); + + return call(clipp::set(t)); + } + + /** @brief adds an action that will set the value of 't' to 'v' */ + template<class Target, class Value> + Derived& + set(Target& t, Value&& v) { + return call(clipp::set(t, std::forward<Value>(v))); + } + + + //--------------------------------------------------------------- + /** @brief adds an action that will be called if a parameter + * matches an argument for the 2nd, 3rd, 4th, ... time + */ + Derived& + if_repeated(simple_action a) { + repeatActions_.push_back(simple_action_adapter{std::move(a)}); + return *static_cast<Derived*>(this); + } + /** @brief adds an action that will be called with the argument's + * index if a parameter matches an argument for + * the 2nd, 3rd, 4th, ... time + */ + Derived& + if_repeated(index_action a) { + repeatActions_.push_back(std::move(a)); + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief adds an action that will be called if a required parameter + * is missing + */ + Derived& + if_missing(simple_action a) { + missingActions_.push_back(simple_action_adapter{std::move(a)}); + return *static_cast<Derived*>(this); + } + /** @brief adds an action that will be called if a required parameter + * is missing; the action will get called with the index of + * the command line argument where the missing event occurred first + */ + Derived& + if_missing(index_action a) { + missingActions_.push_back(std::move(a)); + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief adds an action that will be called if a parameter + * was matched, but was unreachable in the current scope + */ + Derived& + if_blocked(simple_action a) { + blockedActions_.push_back(simple_action_adapter{std::move(a)}); + return *static_cast<Derived*>(this); + } + /** @brief adds an action that will be called if a parameter + * was matched, but was unreachable in the current scope; + * the action will be called with the index of + * the command line argument where the problem occurred + */ + Derived& + if_blocked(index_action a) { + blockedActions_.push_back(std::move(a)); + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief adds an action that will be called if a parameter match + * was in conflict with a different alternative parameter + */ + Derived& + if_conflicted(simple_action a) { + conflictActions_.push_back(simple_action_adapter{std::move(a)}); + return *static_cast<Derived*>(this); + } + /** @brief adds an action that will be called if a parameter match + * was in conflict with a different alternative parameter; + * the action will be called with the index of + * the command line argument where the problem occurred + */ + Derived& + if_conflicted(index_action a) { + conflictActions_.push_back(std::move(a)); + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief adds targets = either objects whose values should be + * set by command line arguments or actions that should + * be called in case of a match */ + template<class T, class... Ts> + Derived& + target(T&& t, Ts&&... ts) { + target(std::forward<T>(t)); + target(std::forward<Ts>(ts)...); + return *static_cast<Derived*>(this); + } + + /** @brief adds action that should be called in case of a match */ + template<class T, class = typename std::enable_if< + !std::is_fundamental<typename std::decay<T>::type>() && + (traits::is_callable<T,void()>() || + traits::is_callable<T,void(const char*)>() ) + >::type> + Derived& + target(T&& t) { + call(std::forward<T>(t)); + return *static_cast<Derived*>(this); + } + + /** @brief adds object whose value should be set by command line arguments + */ + template<class T, class = typename std::enable_if< + std::is_fundamental<typename std::decay<T>::type>() || + (!traits::is_callable<T,void()>() && + !traits::is_callable<T,void(const char*)>() ) + >::type> + Derived& + target(T& t) { + set(t); + return *static_cast<Derived*>(this); + } + + //TODO remove ugly empty param list overload + Derived& + target() { + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief adds target, see member function 'target' */ + template<class Target> + inline friend Derived& + operator << (Target&& t, Derived& p) { + p.target(std::forward<Target>(t)); + return p; + } + /** @brief adds target, see member function 'target' */ + template<class Target> + inline friend Derived&& + operator << (Target&& t, Derived&& p) { + p.target(std::forward<Target>(t)); + return std::move(p); + } + + //----------------------------------------------------- + /** @brief adds target, see member function 'target' */ + template<class Target> + inline friend Derived& + operator >> (Derived& p, Target&& t) { + p.target(std::forward<Target>(t)); + return p; + } + /** @brief adds target, see member function 'target' */ + template<class Target> + inline friend Derived&& + operator >> (Derived&& p, Target&& t) { + p.target(std::forward<Target>(t)); + return std::move(p); + } + + + //--------------------------------------------------------------- + /** @brief executes all argument actions */ + void execute_actions(const arg_string& arg) const { + int i = 0; + for(const auto& a : argActions_) { + ++i; + a(arg.c_str()); + } + } + + /** @brief executes repeat actions */ + void notify_repeated(arg_index idx) const { + for(const auto& a : repeatActions_) a(idx); + } + /** @brief executes missing error actions */ + void notify_missing(arg_index idx) const { + for(const auto& a : missingActions_) a(idx); + } + /** @brief executes blocked error actions */ + void notify_blocked(arg_index idx) const { + for(const auto& a : blockedActions_) a(idx); + } + /** @brief executes conflict error actions */ + void notify_conflict(arg_index idx) const { + for(const auto& a : conflictActions_) a(idx); + } + +private: + //--------------------------------------------------------------- + std::vector<arg_action> argActions_; + std::vector<index_action> repeatActions_; + std::vector<index_action> missingActions_; + std::vector<index_action> blockedActions_; + std::vector<index_action> conflictActions_; +}; + + + + + + +/*************************************************************************//** + * + * @brief mixin that provides basic common settings of parameters and groups + * + *****************************************************************************/ +template<class Derived> +class token +{ +public: + //--------------------------------------------------------------- + using doc_string = clipp::doc_string; + + + //--------------------------------------------------------------- + /** @brief returns documentation string */ + const doc_string& doc() const noexcept { + return doc_; + } + + /** @brief sets documentations string */ + Derived& doc(const doc_string& txt) { + doc_ = txt; + return *static_cast<Derived*>(this); + } + + /** @brief sets documentations string */ + Derived& doc(doc_string&& txt) { + doc_ = std::move(txt); + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief returns if a group/parameter is repeatable */ + bool repeatable() const noexcept { + return repeatable_; + } + + /** @brief sets repeatability of group/parameter */ + Derived& repeatable(bool yes) noexcept { + repeatable_ = yes; + return *static_cast<Derived*>(this); + } + + + //--------------------------------------------------------------- + /** @brief returns if a group/parameter is blocking/positional */ + bool blocking() const noexcept { + return blocking_; + } + + /** @brief determines, if a group/parameter is blocking/positional */ + Derived& blocking(bool yes) noexcept { + blocking_ = yes; + return *static_cast<Derived*>(this); + } + + +private: + //--------------------------------------------------------------- + doc_string doc_; + bool repeatable_ = false; + bool blocking_ = false; +}; + + + + +/*************************************************************************//** + * + * @brief sets documentation strings on a token + * + *****************************************************************************/ +template<class T> +inline T& +operator % (doc_string docstr, token<T>& p) +{ + return p.doc(std::move(docstr)); +} +//--------------------------------------------------------- +template<class T> +inline T&& +operator % (doc_string docstr, token<T>&& p) +{ + return std::move(p.doc(std::move(docstr))); +} + +//--------------------------------------------------------- +template<class T> +inline T& +operator % (token<T>& p, doc_string docstr) +{ + return p.doc(std::move(docstr)); +} +//--------------------------------------------------------- +template<class T> +inline T&& +operator % (token<T>&& p, doc_string docstr) +{ + return std::move(p.doc(std::move(docstr))); +} + + + + +/*************************************************************************//** + * + * @brief sets documentation strings on a token + * + *****************************************************************************/ +template<class T> +inline T& +doc(doc_string docstr, token<T>& p) +{ + return p.doc(std::move(docstr)); +} +//--------------------------------------------------------- +template<class T> +inline T&& +doc(doc_string docstr, token<T>&& p) +{ + return std::move(p.doc(std::move(docstr))); +} + + + +} // namespace detail + + + +/*************************************************************************//** + * + * @brief contains parameter matching functions and function classes + * + *****************************************************************************/ +namespace match { + + +/*************************************************************************//** + * + * @brief predicate that is always true + * + *****************************************************************************/ +inline bool +any(const arg_string&) { return true; } + +/*************************************************************************//** + * + * @brief predicate that is always false + * + *****************************************************************************/ +inline bool +none(const arg_string&) { return false; } + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the argument string is non-empty string + * + *****************************************************************************/ +inline bool +nonempty(const arg_string& s) { + return !s.empty(); +} + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the argument is a non-empty + * string that consists only of alphanumeric characters + * + *****************************************************************************/ +inline bool +alphanumeric(const arg_string& s) { + if(s.empty()) return false; + return std::all_of(s.begin(), s.end(), [](char c) {return std::isalnum(c); }); +} + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the argument is a non-empty + * string that consists only of alphabetic characters + * + *****************************************************************************/ +inline bool +alphabetic(const arg_string& s) { + return std::all_of(s.begin(), s.end(), [](char c) {return std::isalpha(c); }); +} + + + +/*************************************************************************//** + * + * @brief predicate that returns false if the argument string is + * equal to any string from the exclusion list + * + *****************************************************************************/ +class none_of +{ +public: + none_of(arg_list strs): + excluded_{std::move(strs)} + {} + + template<class... Strings> + none_of(arg_string str, Strings&&... strs): + excluded_{std::move(str), std::forward<Strings>(strs)...} + {} + + template<class... Strings> + none_of(const char* str, Strings&&... strs): + excluded_{arg_string(str), std::forward<Strings>(strs)...} + {} + + bool operator () (const arg_string& arg) const { + return (std::find(begin(excluded_), end(excluded_), arg) + == end(excluded_)); + } + +private: + arg_list excluded_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns the first substring match within the input + * string that rmeepresents a number + * (with at maximum one decimal point and digit separators) + * + *****************************************************************************/ +class numbers +{ +public: + explicit + numbers(char decimalPoint = '.', + char digitSeparator = ' ', + char exponentSeparator = 'e') + : + decpoint_{decimalPoint}, separator_{digitSeparator}, + exp_{exponentSeparator} + {} + + subrange operator () (const arg_string& s) const { + return str::first_number_match(s, separator_, decpoint_, exp_); + } + +private: + char decpoint_; + char separator_; + char exp_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the input string represents an integer + * (with optional digit separators) + * + *****************************************************************************/ +class integers { +public: + explicit + integers(char digitSeparator = ' '): separator_{digitSeparator} {} + + subrange operator () (const arg_string& s) const { + return str::first_integer_match(s, separator_); + } + +private: + char separator_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the input string represents + * a non-negative integer (with optional digit separators) + * + *****************************************************************************/ +class positive_integers { +public: + explicit + positive_integers(char digitSeparator = ' '): separator_{digitSeparator} {} + + subrange operator () (const arg_string& s) const { + auto match = str::first_integer_match(s, separator_); + if(!match) return subrange{}; + if(s[match.at()] == '-') return subrange{}; + return match; + } + +private: + char separator_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the input string + * contains a given substring + * + *****************************************************************************/ +class substring +{ +public: + explicit + substring(arg_string str): str_{std::move(str)} {} + + subrange operator () (const arg_string& s) const { + return str::substring_match(s, str_); + } + +private: + arg_string str_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the input string starts + * with a given prefix + * + *****************************************************************************/ +class prefix { +public: + explicit + prefix(arg_string p): prefix_{std::move(p)} {} + + bool operator () (const arg_string& s) const { + return s.find(prefix_) == 0; + } + +private: + arg_string prefix_; +}; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the input string does not start + * with a given prefix + * + *****************************************************************************/ +class prefix_not { +public: + explicit + prefix_not(arg_string p): prefix_{std::move(p)} {} + + bool operator () (const arg_string& s) const { + return s.find(prefix_) != 0; + } + +private: + arg_string prefix_; +}; + + +/** @brief alias for prefix_not */ +using noprefix = prefix_not; + + + +/*************************************************************************//** + * + * @brief predicate that returns true if the length of the input string + * is wihtin a given interval + * + *****************************************************************************/ +class length { +public: + explicit + length(std::size_t exact): + min_{exact}, max_{exact} + {} + + explicit + length(std::size_t min, std::size_t max): + min_{min}, max_{max} + {} + + bool operator () (const arg_string& s) const { + return s.size() >= min_ && s.size() <= max_; + } + +private: + std::size_t min_; + std::size_t max_; +}; + + +/*************************************************************************//** + * + * @brief makes function object that returns true if the input string has a + * given minimum length + * + *****************************************************************************/ +inline length min_length(std::size_t min) +{ + return length{min, arg_string::npos-1}; +} + +/*************************************************************************//** + * + * @brief makes function object that returns true if the input string is + * not longer than a given maximum length + * + *****************************************************************************/ +inline length max_length(std::size_t max) +{ + return length{0, max}; +} + + +} // namespace match + + + + + +/*************************************************************************//** + * + * @brief command line parameter that can match one or many arguments. + * + *****************************************************************************/ +class parameter : + public detail::token<parameter>, + public detail::action_provider<parameter> +{ + /** @brief adapts a 'match_predicate' to the 'match_function' interface */ + class predicate_adapter { + public: + explicit + predicate_adapter(match_predicate pred): match_{std::move(pred)} {} + + subrange operator () (const arg_string& arg) const { + return match_(arg) ? subrange{0,arg.size()} : subrange{}; + } + + private: + match_predicate match_; + }; + +public: + //--------------------------------------------------------------- + /** @brief makes default parameter, that will match nothing */ + parameter(): + flags_{}, + matcher_{predicate_adapter{match::none}}, + label_{}, required_{false}, greedy_{false} + {} + + /** @brief makes "flag" parameter */ + template<class... Strings> + explicit + parameter(arg_string str, Strings&&... strs): + flags_{}, + matcher_{predicate_adapter{match::none}}, + label_{}, required_{false}, greedy_{false} + { + add_flags(std::move(str), std::forward<Strings>(strs)...); + } + + /** @brief makes "flag" parameter from range of strings */ + explicit + parameter(const arg_list& flaglist): + flags_{}, + matcher_{predicate_adapter{match::none}}, + label_{}, required_{false}, greedy_{false} + { + add_flags(flaglist); + } + + //----------------------------------------------------- + /** @brief makes "value" parameter with custom match predicate + * (= yes/no matcher) + */ + explicit + parameter(match_predicate filter): + flags_{}, + matcher_{predicate_adapter{std::move(filter)}}, + label_{}, required_{false}, greedy_{false} + {} + + /** @brief makes "value" parameter with custom match function + * (= partial matcher) + */ + explicit + parameter(match_function filter): + flags_{}, + matcher_{std::move(filter)}, + label_{}, required_{false}, greedy_{false} + {} + + + //--------------------------------------------------------------- + /** @brief returns if a parameter is required */ + bool + required() const noexcept { + return required_; + } + + /** @brief determines if a parameter is required */ + parameter& + required(bool yes) noexcept { + required_ = yes; + return *this; + } + + + //--------------------------------------------------------------- + /** @brief returns if a parameter should match greedily */ + bool + greedy() const noexcept { + return greedy_; + } + + /** @brief determines if a parameter should match greedily */ + parameter& + greedy(bool yes) noexcept { + greedy_ = yes; + return *this; + } + + + //--------------------------------------------------------------- + /** @brief returns parameter label; + * will be used for documentation, if flags are empty + */ + const doc_string& + label() const { + return label_; + } + + /** @brief sets parameter label; + * will be used for documentation, if flags are empty + */ + parameter& + label(const doc_string& lbl) { + label_ = lbl; + return *this; + } + + /** @brief sets parameter label; + * will be used for documentation, if flags are empty + */ + parameter& + label(doc_string&& lbl) { + label_ = lbl; + return *this; + } + + + //--------------------------------------------------------------- + /** @brief returns either longest matching prefix of 'arg' in any + * of the flags or the result of the custom match operation + */ + subrange + match(const arg_string& arg) const + { + if(flags_.empty()) { + return matcher_(arg); + } + else { + //empty flags are not allowed + if(arg.empty()) return subrange{}; + + if(std::find(flags_.begin(), flags_.end(), arg) != flags_.end()) { + return subrange{0,arg.size()}; + } + return str::longest_prefix_match(arg, flags_); + } + } + + + //--------------------------------------------------------------- + /** @brief access range of flag strings */ + const arg_list& + flags() const noexcept { + return flags_; + } + + /** @brief access custom match operation */ + const match_function& + matcher() const noexcept { + return matcher_; + } + + + //--------------------------------------------------------------- + /** @brief prepend prefix to each flag */ + inline friend parameter& + with_prefix(const arg_string& prefix, parameter& p) + { + if(prefix.empty() || p.flags().empty()) return p; + + for(auto& f : p.flags_) { + if(f.find(prefix) != 0) f.insert(0, prefix); + } + return p; + } + + + /** @brief prepend prefix to each flag + */ + inline friend parameter& + with_prefixes_short_long( + const arg_string& shortpfx, const arg_string& longpfx, + parameter& p) + { + if(shortpfx.empty() && longpfx.empty()) return p; + if(p.flags().empty()) return p; + + for(auto& f : p.flags_) { + if(f.size() == 1) { + if(f.find(shortpfx) != 0) f.insert(0, shortpfx); + } else { + if(f.find(longpfx) != 0) f.insert(0, longpfx); + } + } + return p; + } + + + //--------------------------------------------------------------- + /** @brief prepend suffix to each flag */ + inline friend parameter& + with_suffix(const arg_string& suffix, parameter& p) + { + if(suffix.empty() || p.flags().empty()) return p; + + for(auto& f : p.flags_) { + if(f.find(suffix) + suffix.size() != f.size()) { + f.insert(f.end(), suffix.begin(), suffix.end()); + } + } + return p; + } + + + /** @brief prepend suffix to each flag + */ + inline friend parameter& + with_suffixes_short_long( + const arg_string& shortsfx, const arg_string& longsfx, + parameter& p) + { + if(shortsfx.empty() && longsfx.empty()) return p; + if(p.flags().empty()) return p; + + for(auto& f : p.flags_) { + if(f.size() == 1) { + if(f.find(shortsfx) + shortsfx.size() != f.size()) { + f.insert(f.end(), shortsfx.begin(), shortsfx.end()); + } + } else { + if(f.find(longsfx) + longsfx.size() != f.size()) { + f.insert(f.end(), longsfx.begin(), longsfx.end()); + } + } + } + return p; + } + +private: + //--------------------------------------------------------------- + void add_flags(arg_string str) { + //empty flags are not allowed + str::remove_ws(str); + if(!str.empty()) flags_.push_back(std::move(str)); + } + + //--------------------------------------------------------------- + void add_flags(const arg_list& strs) { + if(strs.empty()) return; + flags_.reserve(flags_.size() + strs.size()); + for(const auto& s : strs) add_flags(s); + } + + template<class String1, class String2, class... Strings> + void + add_flags(String1&& s1, String2&& s2, Strings&&... ss) { + flags_.reserve(2 + sizeof...(ss)); + add_flags(std::forward<String1>(s1)); + add_flags(std::forward<String2>(s2), std::forward<Strings>(ss)...); + } + + arg_list flags_; + match_function matcher_; + doc_string label_; + bool required_ = false; + bool greedy_ = false; +}; + + + + +/*************************************************************************//** + * + * @brief makes required non-blocking exact match parameter + * + *****************************************************************************/ +template<class String, class... Strings> +inline parameter +command(String&& flag, Strings&&... flags) +{ + return parameter{std::forward<String>(flag), std::forward<Strings>(flags)...} + .required(true).blocking(true).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required non-blocking exact match parameter + * + *****************************************************************************/ +template<class String, class... Strings> +inline parameter +required(String&& flag, Strings&&... flags) +{ + return parameter{std::forward<String>(flag), std::forward<Strings>(flags)...} + .required(true).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes optional, non-blocking exact match parameter + * + *****************************************************************************/ +template<class String, class... Strings> +inline parameter +option(String&& flag, Strings&&... flags) +{ + return parameter{std::forward<String>(flag), std::forward<Strings>(flags)...} + .required(false).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking, repeatable value parameter; + * matches any non-empty string + * + *****************************************************************************/ +template<class... Targets> +inline parameter +value(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::nonempty} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(false); +} + +template<class Filter, class... Targets, class = typename std::enable_if< + traits::is_callable<Filter,bool(const char*)>::value || + traits::is_callable<Filter,subrange(const char*)>::value>::type> +inline parameter +value(Filter&& filter, doc_string label, Targets&&... tgts) +{ + return parameter{std::forward<Filter>(filter)} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking, repeatable value parameter; + * matches any non-empty string + * + *****************************************************************************/ +template<class... Targets> +inline parameter +values(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::nonempty} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(true); +} + +template<class Filter, class... Targets, class = typename std::enable_if< + traits::is_callable<Filter,bool(const char*)>::value || + traits::is_callable<Filter,subrange(const char*)>::value>::type> +inline parameter +values(Filter&& filter, doc_string label, Targets&&... tgts) +{ + return parameter{std::forward<Filter>(filter)} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking value parameter; + * matches any non-empty string + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_value(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::nonempty} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(false); +} + +template<class Filter, class... Targets, class = typename std::enable_if< + traits::is_callable<Filter,bool(const char*)>::value || + traits::is_callable<Filter,subrange(const char*)>::value>::type> +inline parameter +opt_value(Filter&& filter, doc_string label, Targets&&... tgts) +{ + return parameter{std::forward<Filter>(filter)} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking, repeatable value parameter; + * matches any non-empty string + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_values(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::nonempty} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + +template<class Filter, class... Targets, class = typename std::enable_if< + traits::is_callable<Filter,bool(const char*)>::value || + traits::is_callable<Filter,subrange(const char*)>::value>::type> +inline parameter +opt_values(Filter&& filter, doc_string label, Targets&&... tgts) +{ + return parameter{std::forward<Filter>(filter)} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking value parameter; + * matches any string consisting of alphanumeric characters + * + *****************************************************************************/ +template<class... Targets> +inline parameter +word(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::alphanumeric} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking, repeatable value parameter; + * matches any string consisting of alphanumeric characters + * + *****************************************************************************/ +template<class... Targets> +inline parameter +words(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::alphanumeric} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking value parameter; + * matches any string consisting of alphanumeric characters + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_word(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::alphanumeric} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking, repeatable value parameter; + * matches any string consisting of alphanumeric characters + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_words(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::alphanumeric} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking value parameter; + * matches any string that represents a number + * + *****************************************************************************/ +template<class... Targets> +inline parameter +number(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::numbers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking, repeatable value parameter; + * matches any string that represents a number + * + *****************************************************************************/ +template<class... Targets> +inline parameter +numbers(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::numbers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking value parameter; + * matches any string that represents a number + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_number(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::numbers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking, repeatable value parameter; + * matches any string that represents a number + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_numbers(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::numbers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking value parameter; + * matches any string that represents an integer + * + *****************************************************************************/ +template<class... Targets> +inline parameter +integer(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::integers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes required, blocking, repeatable value parameter; + * matches any string that represents an integer + * + *****************************************************************************/ +template<class... Targets> +inline parameter +integers(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::integers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(true).blocking(true).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking value parameter; + * matches any string that represents an integer + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_integer(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::integers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(false); +} + + + +/*************************************************************************//** + * + * @brief makes optional, blocking, repeatable value parameter; + * matches any string that represents an integer + * + *****************************************************************************/ +template<class... Targets> +inline parameter +opt_integers(const doc_string& label, Targets&&... tgts) +{ + return parameter{match::integers{}} + .label(label) + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes catch-all value parameter + * + *****************************************************************************/ +template<class... Targets> +inline parameter +any_other(Targets&&... tgts) +{ + return parameter{match::any} + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes catch-all value parameter with custom filter + * + *****************************************************************************/ +template<class Filter, class... Targets, class = typename std::enable_if< + traits::is_callable<Filter,bool(const char*)>::value || + traits::is_callable<Filter,subrange(const char*)>::value>::type> +inline parameter +any(Filter&& filter, Targets&&... tgts) +{ + return parameter{std::forward<Filter>(filter)} + .target(std::forward<Targets>(tgts)...) + .required(false).blocking(false).repeatable(true); +} + + + + +/*************************************************************************//** + * + * @brief group of parameters and/or other groups; + * can be configured to act as a group of alternatives (exclusive match) + * + *****************************************************************************/ +class group : + public detail::token<group> +{ + //--------------------------------------------------------------- + /** + * @brief tagged union type that either stores a parameter or a group + * and provides a common interface to them + * could be replaced by std::variant in the future + * + * Note to future self: do NOT try again to do this with + * dynamic polymorphism; there are a couple of + * nasty problems associated with it and the implementation + * becomes bloated and needlessly complicated. + */ + template<class Param, class Group> + struct child_t { + enum class type : char {param, group}; + public: + + explicit + child_t(const Param& v) : m_{v}, type_{type::param} {} + child_t( Param&& v) noexcept : m_{std::move(v)}, type_{type::param} {} + + explicit + child_t(const Group& g) : m_{g}, type_{type::group} {} + child_t( Group&& g) noexcept : m_{std::move(g)}, type_{type::group} {} + + child_t(const child_t& src): type_{src.type_} { + switch(type_) { + default: + case type::param: new(&m_)data{src.m_.param}; break; + case type::group: new(&m_)data{src.m_.group}; break; + } + } + + child_t(child_t&& src) noexcept : type_{src.type_} { + switch(type_) { + default: + case type::param: new(&m_)data{std::move(src.m_.param)}; break; + case type::group: new(&m_)data{std::move(src.m_.group)}; break; + } + } + + child_t& operator = (const child_t& src) { + destroy_content(); + type_ = src.type_; + switch(type_) { + default: + case type::param: new(&m_)data{src.m_.param}; break; + case type::group: new(&m_)data{src.m_.group}; break; + } + return *this; + } + + child_t& operator = (child_t&& src) noexcept { + destroy_content(); + type_ = src.type_; + switch(type_) { + default: + case type::param: new(&m_)data{std::move(src.m_.param)}; break; + case type::group: new(&m_)data{std::move(src.m_.group)}; break; + } + return *this; + } + + ~child_t() { + destroy_content(); + } + + const doc_string& + doc() const noexcept { + switch(type_) { + default: + case type::param: return m_.param.doc(); + case type::group: return m_.group.doc(); + } + } + + bool blocking() const noexcept { + switch(type_) { + case type::param: return m_.param.blocking(); + case type::group: return m_.group.blocking(); + default: return false; + } + } + bool repeatable() const noexcept { + switch(type_) { + case type::param: return m_.param.repeatable(); + case type::group: return m_.group.repeatable(); + default: return false; + } + } + bool required() const noexcept { + switch(type_) { + case type::param: return m_.param.required(); + case type::group: + return (m_.group.exclusive() && m_.group.all_required() ) || + (!m_.group.exclusive() && m_.group.any_required() ); + default: return false; + } + } + bool exclusive() const noexcept { + switch(type_) { + case type::group: return m_.group.exclusive(); + case type::param: + default: return false; + } + } + std::size_t param_count() const noexcept { + switch(type_) { + case type::group: return m_.group.param_count(); + case type::param: + default: return std::size_t(1); + } + } + std::size_t depth() const noexcept { + switch(type_) { + case type::group: return m_.group.depth(); + case type::param: + default: return std::size_t(0); + } + } + + void execute_actions(const arg_string& arg) const { + switch(type_) { + default: + case type::group: return; + case type::param: m_.param.execute_actions(arg); break; + } + + } + + void notify_repeated(arg_index idx) const { + switch(type_) { + default: + case type::group: return; + case type::param: m_.param.notify_repeated(idx); break; + } + } + void notify_missing(arg_index idx) const { + switch(type_) { + default: + case type::group: return; + case type::param: m_.param.notify_missing(idx); break; + } + } + void notify_blocked(arg_index idx) const { + switch(type_) { + default: + case type::group: return; + case type::param: m_.param.notify_blocked(idx); break; + } + } + void notify_conflict(arg_index idx) const { + switch(type_) { + default: + case type::group: return; + case type::param: m_.param.notify_conflict(idx); break; + } + } + + bool is_param() const noexcept { return type_ == type::param; } + bool is_group() const noexcept { return type_ == type::group; } + + Param& as_param() noexcept { return m_.param; } + Group& as_group() noexcept { return m_.group; } + + const Param& as_param() const noexcept { return m_.param; } + const Group& as_group() const noexcept { return m_.group; } + + private: + void destroy_content() { + switch(type_) { + default: + case type::param: m_.param.~Param(); break; + case type::group: m_.group.~Group(); break; + } + } + + union data { + data() {} + + data(const Param& v) : param{v} {} + data( Param&& v) noexcept : param{std::move(v)} {} + + data(const Group& g) : group{g} {} + data( Group&& g) noexcept : group{std::move(g)} {} + ~data() {} + + Param param; + Group group; + }; + + data m_; + type type_; + }; + + +public: + //--------------------------------------------------------------- + using child = child_t<parameter,group>; + using value_type = child; + +private: + using children_store = std::vector<child>; + +public: + using const_iterator = children_store::const_iterator; + using iterator = children_store::iterator; + using size_type = children_store::size_type; + + + //--------------------------------------------------------------- + /** + * @brief recursively iterates over all nodes + */ + class depth_first_traverser + { + public: + //----------------------------------------------------- + struct context { + context() = default; + context(const group& p): + parent{&p}, cur{p.begin()}, end{p.end()} + {} + const group* parent = nullptr; + const_iterator cur; + const_iterator end; + }; + using context_list = std::vector<context>; + + //----------------------------------------------------- + class memento { + friend class depth_first_traverser; + int level_; + context context_; + public: + int level() const noexcept { return level_; } + const child* param() const noexcept { return &(*context_.cur); } + }; + + depth_first_traverser() = default; + + explicit + depth_first_traverser(const group& cur): stack_{} { + if(!cur.empty()) stack_.emplace_back(cur); + } + + explicit operator bool() const noexcept { + return !stack_.empty(); + } + + int level() const noexcept { + return int(stack_.size()); + } + + bool is_first_in_parent() const noexcept { + if(stack_.empty()) return false; + return (stack_.back().cur == stack_.back().parent->begin()); + } + + bool is_last_in_parent() const noexcept { + if(stack_.empty()) return false; + return (stack_.back().cur+1 == stack_.back().end); + } + + bool is_last_in_path() const noexcept { + if(stack_.empty()) return false; + for(const auto& t : stack_) { + if(t.cur+1 != t.end) return false; + } + const auto& top = stack_.back(); + //if we have to descend into group on next ++ => not last in path + if(top.cur->is_group()) return false; + return true; + } + + /** @brief inside a group of alternatives >= minlevel */ + bool is_alternative(int minlevel = 0) const noexcept { + if(stack_.empty()) return false; + if(minlevel > 0) minlevel -= 1; + if(minlevel >= int(stack_.size())) return false; + return std::any_of(stack_.begin() + minlevel, stack_.end(), + [](const context& c) { return c.parent->exclusive(); }); + } + + /** @brief repeatable or inside a repeatable group >= minlevel */ + bool is_repeatable(int minlevel = 0) const noexcept { + if(stack_.empty()) return false; + if(stack_.back().cur->repeatable()) return true; + if(minlevel > 0) minlevel -= 1; + if(minlevel >= int(stack_.size())) return false; + return std::any_of(stack_.begin() + minlevel, stack_.end(), + [](const context& c) { return c.parent->repeatable(); }); + } + + /** @brief inside a particular group */ + bool is_inside(const group* g) const noexcept { + if(!g) return false; + return std::any_of(stack_.begin(), stack_.end(), + [g](const context& c) { return c.parent == g; }); + } + + /** @brief inside group with joinable flags */ + bool joinable() const noexcept { + if(stack_.empty()) return false; + return std::any_of(stack_.begin(), stack_.end(), + [](const context& c) { return c.parent->joinable(); }); + } + + const context_list& + stack() const { + return stack_; + } + + /** @brief innermost repeat group */ + const group* + innermost_repeat_group() const noexcept { + auto i = std::find_if(stack_.rbegin(), stack_.rend(), + [](const context& c) { return c.parent->repeatable(); }); + return i != stack_.rend() ? i->parent : nullptr; + } + + /** @brief innermost exclusive (alternatives) group */ + const group* + innermost_exclusive_group() const noexcept { + auto i = std::find_if(stack_.rbegin(), stack_.rend(), + [](const context& c) { return c.parent->exclusive(); }); + return i != stack_.rend() ? i->parent : nullptr; + } + + /** @brief innermost blocking group */ + const group* + innermost_blocking_group() const noexcept { + auto i = std::find_if(stack_.rbegin(), stack_.rend(), + [](const context& c) { return c.parent->blocking(); }); + return i != stack_.rend() ? i->parent : nullptr; + } + + /** @brief returns the outermost group that will be left on next ++*/ + const group* + outermost_blocking_group_fully_explored() const noexcept { + if(stack_.empty()) return nullptr; + + const group* g = nullptr; + for(auto i = stack_.rbegin(); i != stack_.rend(); ++i) { + if(i->cur+1 == i->end) { + if(i->parent->blocking()) g = i->parent; + } else { + return g; + } + } + return g; + } + + /** @brief outermost join group */ + const group* + outermost_join_group() const noexcept { + auto i = std::find_if(stack_.begin(), stack_.end(), + [](const context& c) { return c.parent->joinable(); }); + return i != stack_.end() ? i->parent : nullptr; + } + + const group* root() const noexcept { + return stack_.empty() ? nullptr : stack_.front().parent; + } + + /** @brief common flag prefix of all flags in current group */ + arg_string common_flag_prefix() const noexcept { + if(stack_.empty()) return ""; + auto g = outermost_join_group(); + return g ? g->common_flag_prefix() : arg_string(""); + } + + const child& + operator * () const noexcept { + return *stack_.back().cur; + } + + const child* + operator -> () const noexcept { + return &(*stack_.back().cur); + } + + const group& + parent() const noexcept { + return *(stack_.back().parent); + } + + + /** @brief go to next element of depth first search */ + depth_first_traverser& + operator ++ () { + if(stack_.empty()) return *this; + //at group -> decend into group + if(stack_.back().cur->is_group()) { + stack_.emplace_back(stack_.back().cur->as_group()); + } + else { + next_sibling(); + } + return *this; + } + + /** @brief go to next sibling of current */ + depth_first_traverser& + next_sibling() { + if(stack_.empty()) return *this; + ++stack_.back().cur; + //at the end of current group? + while(stack_.back().cur == stack_.back().end) { + //go to parent + stack_.pop_back(); + if(stack_.empty()) return *this; + //go to next sibling in parent + ++stack_.back().cur; + } + return *this; + } + + /** @brief go to next position after siblings of current */ + depth_first_traverser& + next_after_siblings() { + if(stack_.empty()) return *this; + stack_.back().cur = stack_.back().end-1; + next_sibling(); + return *this; + } + + /** + * @brief + */ + depth_first_traverser& + back_to_ancestor(const group* g) { + if(!g) return *this; + while(!stack_.empty()) { + const auto& top = stack_.back().cur; + if(top->is_group() && &(top->as_group()) == g) return *this; + stack_.pop_back(); + } + return *this; + } + + /** @brief don't visit next siblings, go back to parent on next ++ + * note: renders siblings unreachable for *this + **/ + depth_first_traverser& + skip_siblings() { + if(stack_.empty()) return *this; + //future increments won't visit subsequent siblings: + stack_.back().end = stack_.back().cur+1; + return *this; + } + + /** @brief skips all other alternatives in surrounding exclusive groups + * on next ++ + * note: renders alternatives unreachable for *this + */ + depth_first_traverser& + skip_alternatives() { + if(stack_.empty()) return *this; + + //exclude all other alternatives in surrounding groups + //by making their current position the last one + for(auto& c : stack_) { + if(c.parent && c.parent->exclusive() && c.cur < c.end) + c.end = c.cur+1; + } + + return *this; + } + + void invalidate() { + stack_.clear(); + } + + inline friend bool operator == (const depth_first_traverser& a, + const depth_first_traverser& b) + { + if(a.stack_.empty() || b.stack_.empty()) return false; + + //parents not the same -> different position + if(a.stack_.back().parent != b.stack_.back().parent) return false; + + bool aEnd = a.stack_.back().cur == a.stack_.back().end; + bool bEnd = b.stack_.back().cur == b.stack_.back().end; + //either both at the end of the same parent => same position + if(aEnd && bEnd) return true; + //or only one at the end => not at the same position + if(aEnd || bEnd) return false; + return std::addressof(*a.stack_.back().cur) == + std::addressof(*b.stack_.back().cur); + } + inline friend bool operator != (const depth_first_traverser& a, + const depth_first_traverser& b) + { + return !(a == b); + } + + memento + undo_point() const { + memento m; + m.level_ = int(stack_.size()); + if(!stack_.empty()) m.context_ = stack_.back(); + return m; + } + + void undo(const memento& m) { + if(m.level_ < 1) return; + if(m.level_ <= int(stack_.size())) { + stack_.erase(stack_.begin() + m.level_, stack_.end()); + stack_.back() = m.context_; + } + else if(stack_.empty() && m.level_ == 1) { + stack_.push_back(m.context_); + } + } + + private: + context_list stack_; + }; + + + //--------------------------------------------------------------- + group() = default; + + template<class Param, class... Params> + explicit + group(doc_string docstr, Param param, Params... params): + children_{}, exclusive_{false}, joinable_{false}, scoped_{true} + { + doc(std::move(docstr)); + push_back(std::move(param), std::move(params)...); + } + + template<class... Params> + explicit + group(parameter param, Params... params): + children_{}, exclusive_{false}, joinable_{false}, scoped_{true} + { + push_back(std::move(param), std::move(params)...); + } + + template<class P2, class... Ps> + explicit + group(group p1, P2 p2, Ps... ps): + children_{}, exclusive_{false}, joinable_{false}, scoped_{true} + { + push_back(std::move(p1), std::move(p2), std::move(ps)...); + } + + + //----------------------------------------------------- + group(const group&) = default; + group(group&&) = default; + + + //--------------------------------------------------------------- + group& operator = (const group&) = default; + group& operator = (group&&) = default; + + + //--------------------------------------------------------------- + /** @brief determines if a command line argument can be matched by a + * combination of (partial) matches through any number of children + */ + group& joinable(bool yes) { + joinable_ = yes; + return *this; + } + + /** @brief returns if a command line argument can be matched by a + * combination of (partial) matches through any number of children + */ + bool joinable() const noexcept { + return joinable_; + } + + + //--------------------------------------------------------------- + /** @brief turns explicit scoping on or off + * operators , & | and other combinating functions will + * not merge groups that are marked as scoped + */ + group& scoped(bool yes) { + scoped_ = yes; + return *this; + } + + /** @brief returns true if operators , & | and other combinating functions + * will merge groups and false otherwise + */ + bool scoped() const noexcept + { + return scoped_; + } + + + //--------------------------------------------------------------- + /** @brief determines if children are mutually exclusive alternatives */ + group& exclusive(bool yes) { + exclusive_ = yes; + return *this; + } + /** @brief returns if children are mutually exclusive alternatives */ + bool exclusive() const noexcept { + return exclusive_; + } + + + //--------------------------------------------------------------- + /** @brief returns true, if any child is required to match */ + bool any_required() const + { + return std::any_of(children_.begin(), children_.end(), + [](const child& n){ return n.required(); }); + } + /** @brief returns true, if all children are required to match */ + bool all_required() const + { + return std::all_of(children_.begin(), children_.end(), + [](const child& n){ return n.required(); }); + } + + + //--------------------------------------------------------------- + /** @brief returns true if any child is optional (=non-required) */ + bool any_optional() const { + return !all_required(); + } + /** @brief returns true if all children are optional (=non-required) */ + bool all_optional() const { + return !any_required(); + } + + + //--------------------------------------------------------------- + /** @brief returns if the entire group is blocking / positional */ + bool blocking() const noexcept { + return token<group>::blocking() || (exclusive() && all_blocking()); + } + //----------------------------------------------------- + /** @brief determines if the entire group is blocking / positional */ + group& blocking(bool yes) { + return token<group>::blocking(yes); + } + + //--------------------------------------------------------------- + /** @brief returns true if any child is blocking */ + bool any_blocking() const + { + return std::any_of(children_.begin(), children_.end(), + [](const child& n){ return n.blocking(); }); + } + //--------------------------------------------------------------- + /** @brief returns true if all children is blocking */ + bool all_blocking() const + { + return std::all_of(children_.begin(), children_.end(), + [](const child& n){ return n.blocking(); }); + } + + + //--------------------------------------------------------------- + /** @brief returns if any child is a value parameter (recursive) */ + bool any_flagless() const + { + return std::any_of(children_.begin(), children_.end(), + [](const child& p){ + return p.is_param() && p.as_param().flags().empty(); + }); + } + /** @brief returns if all children are value parameters (recursive) */ + bool all_flagless() const + { + return std::all_of(children_.begin(), children_.end(), + [](const child& p){ + return p.is_param() && p.as_param().flags().empty(); + }); + } + + + //--------------------------------------------------------------- + /** @brief adds child parameter at the end */ + group& + push_back(const parameter& v) { + children_.emplace_back(v); + return *this; + } + //----------------------------------------------------- + /** @brief adds child parameter at the end */ + group& + push_back(parameter&& v) { + children_.emplace_back(std::move(v)); + return *this; + } + //----------------------------------------------------- + /** @brief adds child group at the end */ + group& + push_back(const group& g) { + children_.emplace_back(g); + return *this; + } + //----------------------------------------------------- + /** @brief adds child group at the end */ + group& + push_back(group&& g) { + children_.emplace_back(std::move(g)); + return *this; + } + + + //----------------------------------------------------- + /** @brief adds children (groups and/or parameters) */ + template<class Param1, class Param2, class... Params> + group& + push_back(Param1&& param1, Param2&& param2, Params&&... params) + { + children_.reserve(children_.size() + 2 + sizeof...(params)); + push_back(std::forward<Param1>(param1)); + push_back(std::forward<Param2>(param2), std::forward<Params>(params)...); + return *this; + } + + + //--------------------------------------------------------------- + /** @brief adds child parameter at the beginning */ + group& + push_front(const parameter& v) { + children_.emplace(children_.begin(), v); + return *this; + } + //----------------------------------------------------- + /** @brief adds child parameter at the beginning */ + group& + push_front(parameter&& v) { + children_.emplace(children_.begin(), std::move(v)); + return *this; + } + //----------------------------------------------------- + /** @brief adds child group at the beginning */ + group& + push_front(const group& g) { + children_.emplace(children_.begin(), g); + return *this; + } + //----------------------------------------------------- + /** @brief adds child group at the beginning */ + group& + push_front(group&& g) { + children_.emplace(children_.begin(), std::move(g)); + return *this; + } + + + //--------------------------------------------------------------- + /** @brief adds all children of other group at the end */ + group& + merge(group&& g) + { + children_.insert(children_.end(), + std::make_move_iterator(g.begin()), + std::make_move_iterator(g.end())); + return *this; + } + //----------------------------------------------------- + /** @brief adds all children of several other groups at the end */ + template<class... Groups> + group& + merge(group&& g1, group&& g2, Groups&&... gs) + { + merge(std::move(g1)); + merge(std::move(g2), std::forward<Groups>(gs)...); + return *this; + } + + + //--------------------------------------------------------------- + /** @brief indexed, nutable access to child */ + child& operator [] (size_type index) noexcept { + return children_[index]; + } + /** @brief indexed, non-nutable access to child */ + const child& operator [] (size_type index) const noexcept { + return children_[index]; + } + + //--------------------------------------------------------------- + /** @brief mutable access to first child */ + child& front() noexcept { return children_.front(); } + /** @brief non-mutable access to first child */ + const child& front() const noexcept { return children_.front(); } + //----------------------------------------------------- + /** @brief mutable access to last child */ + child& back() noexcept { return children_.back(); } + /** @brief non-mutable access to last child */ + const child& back() const noexcept { return children_.back(); } + + + //--------------------------------------------------------------- + /** @brief returns true, if group has no children, false otherwise */ + bool empty() const noexcept { return children_.empty(); } + + /** @brief returns number of children */ + size_type size() const noexcept { return children_.size(); } + + /** @brief returns number of nested levels; 1 for a flat group */ + size_type depth() const { + size_type n = 0; + for(const auto& c : children_) { + auto l = 1 + c.depth(); + if(l > n) n = l; + } + return n; + } + + + //--------------------------------------------------------------- + /** @brief returns mutating iterator to position of first element */ + iterator begin() noexcept { return children_.begin(); } + /** @brief returns non-mutating iterator to position of first element */ + const_iterator begin() const noexcept { return children_.begin(); } + /** @brief returns non-mutating iterator to position of first element */ + const_iterator cbegin() const noexcept { return children_.begin(); } + + /** @brief returns mutating iterator to position one past the last element */ + iterator end() noexcept { return children_.end(); } + /** @brief returns non-mutating iterator to position one past the last element */ + const_iterator end() const noexcept { return children_.end(); } + /** @brief returns non-mutating iterator to position one past the last element */ + const_iterator cend() const noexcept { return children_.end(); } + + + //--------------------------------------------------------------- + /** @brief returns augmented iterator for depth first searches + * @details traverser knows end of iteration and can skip over children + */ + depth_first_traverser + begin_dfs() const noexcept { + return depth_first_traverser{*this}; + } + + + //--------------------------------------------------------------- + /** @brief returns recursive parameter count */ + size_type param_count() const { + size_type c = 0; + for(const auto& n : children_) { + c += n.param_count(); + } + return c; + } + + + //--------------------------------------------------------------- + /** @brief returns range of all flags (recursive) */ + arg_list all_flags() const + { + std::vector<arg_string> all; + gather_flags(children_, all); + return all; + } + + /** @brief returns true, if no flag occurs as true + * prefix of any other flag (identical flags will be ignored) */ + bool flags_are_prefix_free() const + { + const auto fs = all_flags(); + + using std::begin; using std::end; + for(auto i = begin(fs), e = end(fs); i != e; ++i) { + if(!i->empty()) { + for(auto j = i+1; j != e; ++j) { + if(!j->empty() && *i != *j) { + if(i->find(*j) == 0) return false; + if(j->find(*i) == 0) return false; + } + } + } + } + + return true; + } + + + //--------------------------------------------------------------- + /** @brief returns longest common prefix of all flags */ + arg_string common_flag_prefix() const + { + arg_list prefixes; + gather_prefixes(children_, prefixes); + return str::longest_common_prefix(prefixes); + } + + +private: + //--------------------------------------------------------------- + static void + gather_flags(const children_store& nodes, arg_list& all) + { + for(const auto& p : nodes) { + if(p.is_group()) { + gather_flags(p.as_group().children_, all); + } + else { + const auto& pf = p.as_param().flags(); + using std::begin; + using std::end; + if(!pf.empty()) all.insert(end(all), begin(pf), end(pf)); + } + } + } + //--------------------------------------------------------------- + static void + gather_prefixes(const children_store& nodes, arg_list& all) + { + for(const auto& p : nodes) { + if(p.is_group()) { + gather_prefixes(p.as_group().children_, all); + } + else if(!p.as_param().flags().empty()) { + auto pfx = str::longest_common_prefix(p.as_param().flags()); + if(!pfx.empty()) all.push_back(std::move(pfx)); + } + } + } + + //--------------------------------------------------------------- + children_store children_; + bool exclusive_ = false; + bool joinable_ = false; + bool scoped_ = false; +}; + + + +/*************************************************************************//** + * + * @brief group or parameter + * + *****************************************************************************/ +using pattern = group::child; + + + +/*************************************************************************//** + * + * @brief apply an action to all parameters in a group + * + *****************************************************************************/ +template<class Action> +void for_all_params(group& g, Action&& action) +{ + for(auto& p : g) { + if(p.is_group()) { + for_all_params(p.as_group(), action); + } + else { + action(p.as_param()); + } + } +} + +template<class Action> +void for_all_params(const group& g, Action&& action) +{ + for(auto& p : g) { + if(p.is_group()) { + for_all_params(p.as_group(), action); + } + else { + action(p.as_param()); + } + } +} + + + +/*************************************************************************//** + * + * @brief makes a group of parameters and/or groups + * + *****************************************************************************/ +inline group +operator , (parameter a, parameter b) +{ + return group{std::move(a), std::move(b)}.scoped(false); +} + +//--------------------------------------------------------- +inline group +operator , (parameter a, group b) +{ + return !b.scoped() && !b.blocking() && !b.exclusive() && !b.repeatable() + && !b.joinable() && (b.doc().empty() || b.doc() == a.doc()) + ? b.push_front(std::move(a)) + : group{std::move(a), std::move(b)}.scoped(false); +} + +//--------------------------------------------------------- +inline group +operator , (group a, parameter b) +{ + return !a.scoped() && !a.blocking() && !a.exclusive() && !a.repeatable() + && !a.joinable() && (a.doc().empty() || a.doc() == b.doc()) + ? a.push_back(std::move(b)) + : group{std::move(a), std::move(b)}.scoped(false); +} + +//--------------------------------------------------------- +inline group +operator , (group a, group b) +{ + return !a.scoped() && !a.blocking() && !a.exclusive() && !a.repeatable() + && !a.joinable() && (a.doc().empty() || a.doc() == b.doc()) + ? a.push_back(std::move(b)) + : group{std::move(a), std::move(b)}.scoped(false); +} + + + +/*************************************************************************//** + * + * @brief makes a group of alternative parameters or groups + * + *****************************************************************************/ +template<class Param, class... Params> +inline group +one_of(Param param, Params... params) +{ + return group{std::move(param), std::move(params)...}.exclusive(true); +} + + +/*************************************************************************//** + * + * @brief makes a group of alternative parameters or groups + * + *****************************************************************************/ +inline group +operator | (parameter a, parameter b) +{ + return group{std::move(a), std::move(b)}.scoped(false).exclusive(true); +} + +//------------------------------------------------------------------- +inline group +operator | (parameter a, group b) +{ + return !b.scoped() && !b.blocking() && b.exclusive() && !b.repeatable() + && !b.joinable() + && (b.doc().empty() || b.doc() == a.doc()) + ? b.push_front(std::move(a)) + : group{std::move(a), std::move(b)}.scoped(false).exclusive(true); +} + +//------------------------------------------------------------------- +inline group +operator | (group a, parameter b) +{ + return !a.scoped() && a.exclusive() && !a.repeatable() && !a.joinable() + && a.blocking() == b.blocking() + && (a.doc().empty() || a.doc() == b.doc()) + ? a.push_back(std::move(b)) + : group{std::move(a), std::move(b)}.scoped(false).exclusive(true); +} + +inline group +operator | (group a, group b) +{ + return !a.scoped() && a.exclusive() &&!a.repeatable() && !a.joinable() + && a.blocking() == b.blocking() + && (a.doc().empty() || a.doc() == b.doc()) + ? a.push_back(std::move(b)) + : group{std::move(a), std::move(b)}.scoped(false).exclusive(true); +} + + + +/*************************************************************************//** + * + * @brief helpers (NOT FOR DIRECT USE IN CLIENT CODE!) + * no interface guarantees; might be changed or removed in the future + * + *****************************************************************************/ +namespace detail { + +inline void set_blocking(bool) {} + +template<class P, class... Ps> +void set_blocking(bool yes, P& p, Ps&... ps) { + p.blocking(yes); + set_blocking(yes, ps...); +} + +} // namespace detail + + +/*************************************************************************//** + * + * @brief makes a parameter/group sequence by making all input objects blocking + * + *****************************************************************************/ +template<class Param, class... Params> +inline group +in_sequence(Param param, Params... params) +{ + detail::set_blocking(true, param, params...); + return group{std::move(param), std::move(params)...}.scoped(true); +} + + +/*************************************************************************//** + * + * @brief makes a parameter/group sequence by making all input objects blocking + * + *****************************************************************************/ +inline group +operator & (parameter a, parameter b) +{ + a.blocking(true); + b.blocking(true); + return group{std::move(a), std::move(b)}.scoped(true); +} + +//--------------------------------------------------------- +inline group +operator & (parameter a, group b) +{ + a.blocking(true); + return group{std::move(a), std::move(b)}.scoped(true); +} + +//--------------------------------------------------------- +inline group +operator & (group a, parameter b) +{ + b.blocking(true); + if(a.all_blocking() && !a.exclusive() && !a.repeatable() && !a.joinable() + && (a.doc().empty() || a.doc() == b.doc())) + { + return a.push_back(std::move(b)); + } + else { + if(!a.all_blocking()) a.blocking(true); + return group{std::move(a), std::move(b)}.scoped(true); + } +} + +inline group +operator & (group a, group b) +{ + if(!b.all_blocking()) b.blocking(true); + if(a.all_blocking() && !a.exclusive() && !a.repeatable() + && !a.joinable() && (a.doc().empty() || a.doc() == b.doc())) + { + return a.push_back(std::move(b)); + } + else { + if(!a.all_blocking()) a.blocking(true); + return group{std::move(a), std::move(b)}.scoped(true); + } +} + + + +/*************************************************************************//** + * + * @brief makes a group of parameters and/or groups + * where all single char flag params ("-a", "b", ...) are joinable + * + *****************************************************************************/ +inline group +joinable(group g) { + return g.joinable(true); +} + +//------------------------------------------------------------------- +template<class... Params> +inline group +joinable(parameter param, Params... params) +{ + return group{std::move(param), std::move(params)...}.joinable(true); +} + +template<class P2, class... Ps> +inline group +joinable(group p1, P2 p2, Ps... ps) +{ + return group{std::move(p1), std::move(p2), std::move(ps)...}.joinable(true); +} + +template<class Param, class... Params> +inline group +joinable(doc_string docstr, Param param, Params... params) +{ + return group{std::move(param), std::move(params)...} + .joinable(true).doc(std::move(docstr)); +} + + + +/*************************************************************************//** + * + * @brief makes a repeatable copy of a parameter + * + *****************************************************************************/ +inline parameter +repeatable(parameter p) { + return p.repeatable(true); +} + +/*************************************************************************//** + * + * @brief makes a repeatable copy of a group + * + *****************************************************************************/ +inline group +repeatable(group g) { + return g.repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes a group of parameters and/or groups + * that is repeatable as a whole + * Note that a repeatable group consisting entirely of non-blocking + * children is equivalent to a non-repeatable group of + * repeatable children. + * + *****************************************************************************/ +template<class P2, class... Ps> +inline group +repeatable(parameter p1, P2 p2, Ps... ps) +{ + return group{std::move(p1), std::move(p2), + std::move(ps)...}.repeatable(true); +} + +template<class P2, class... Ps> +inline group +repeatable(group p1, P2 p2, Ps... ps) +{ + return group{std::move(p1), std::move(p2), + std::move(ps)...}.repeatable(true); +} + + + +/*************************************************************************//** + * + * @brief makes a parameter greedy (match with top priority) + * + *****************************************************************************/ +inline parameter +greedy(parameter p) { + return p.greedy(true); +} + +inline parameter +operator ! (parameter p) { + return greedy(p); +} + + + +/*************************************************************************//** + * + * @brief recursively prepends a prefix to all flags + * + *****************************************************************************/ +inline parameter&& +with_prefix(const arg_string& prefix, parameter&& p) { + return std::move(with_prefix(prefix, p)); +} + + +//------------------------------------------------------------------- +inline group& +with_prefix(const arg_string& prefix, group& g) +{ + for(auto& p : g) { + if(p.is_group()) { + with_prefix(prefix, p.as_group()); + } else { + with_prefix(prefix, p.as_param()); + } + } + return g; +} + + +inline group&& +with_prefix(const arg_string& prefix, group&& params) +{ + return std::move(with_prefix(prefix, params)); +} + + +template<class Param, class... Params> +inline group +with_prefix(arg_string prefix, Param&& param, Params&&... params) +{ + return with_prefix(prefix, group{std::forward<Param>(param), + std::forward<Params>(params)...}); +} + + + +/*************************************************************************//** + * + * @brief recursively prepends a prefix to all flags + * + * @param shortpfx : used for single-letter flags + * @param longpfx : used for flags with length > 1 + * + *****************************************************************************/ +inline parameter&& +with_prefixes_short_long(const arg_string& shortpfx, const arg_string& longpfx, + parameter&& p) +{ + return std::move(with_prefixes_short_long(shortpfx, longpfx, p)); +} + + +//------------------------------------------------------------------- +inline group& +with_prefixes_short_long(const arg_string& shortFlagPrefix, + const arg_string& longFlagPrefix, + group& g) +{ + for(auto& p : g) { + if(p.is_group()) { + with_prefixes_short_long(shortFlagPrefix, longFlagPrefix, p.as_group()); + } else { + with_prefixes_short_long(shortFlagPrefix, longFlagPrefix, p.as_param()); + } + } + return g; +} + + +inline group&& +with_prefixes_short_long(const arg_string& shortFlagPrefix, + const arg_string& longFlagPrefix, + group&& params) +{ + return std::move(with_prefixes_short_long(shortFlagPrefix, longFlagPrefix, + params)); +} + + +template<class Param, class... Params> +inline group +with_prefixes_short_long(const arg_string& shortFlagPrefix, + const arg_string& longFlagPrefix, + Param&& param, Params&&... params) +{ + return with_prefixes_short_long(shortFlagPrefix, longFlagPrefix, + group{std::forward<Param>(param), + std::forward<Params>(params)...}); +} + + + +/*************************************************************************//** + * + * @brief recursively prepends a suffix to all flags + * + *****************************************************************************/ +inline parameter&& +with_suffix(const arg_string& suffix, parameter&& p) { + return std::move(with_suffix(suffix, p)); +} + + +//------------------------------------------------------------------- +inline group& +with_suffix(const arg_string& suffix, group& g) +{ + for(auto& p : g) { + if(p.is_group()) { + with_suffix(suffix, p.as_group()); + } else { + with_suffix(suffix, p.as_param()); + } + } + return g; +} + + +inline group&& +with_suffix(const arg_string& suffix, group&& params) +{ + return std::move(with_suffix(suffix, params)); +} + + +template<class Param, class... Params> +inline group +with_suffix(arg_string suffix, Param&& param, Params&&... params) +{ + return with_suffix(suffix, group{std::forward<Param>(param), + std::forward<Params>(params)...}); +} + + + +/*************************************************************************//** + * + * @brief recursively prepends a suffix to all flags + * + * @param shortsfx : used for single-letter flags + * @param longsfx : used for flags with length > 1 + * + *****************************************************************************/ +inline parameter&& +with_suffixes_short_long(const arg_string& shortsfx, const arg_string& longsfx, + parameter&& p) +{ + return std::move(with_suffixes_short_long(shortsfx, longsfx, p)); +} + + +//------------------------------------------------------------------- +inline group& +with_suffixes_short_long(const arg_string& shortFlagSuffix, + const arg_string& longFlagSuffix, + group& g) +{ + for(auto& p : g) { + if(p.is_group()) { + with_suffixes_short_long(shortFlagSuffix, longFlagSuffix, p.as_group()); + } else { + with_suffixes_short_long(shortFlagSuffix, longFlagSuffix, p.as_param()); + } + } + return g; +} + + +inline group&& +with_suffixes_short_long(const arg_string& shortFlagSuffix, + const arg_string& longFlagSuffix, + group&& params) +{ + return std::move(with_suffixes_short_long(shortFlagSuffix, longFlagSuffix, + params)); +} + + +template<class Param, class... Params> +inline group +with_suffixes_short_long(const arg_string& shortFlagSuffix, + const arg_string& longFlagSuffix, + Param&& param, Params&&... params) +{ + return with_suffixes_short_long(shortFlagSuffix, longFlagSuffix, + group{std::forward<Param>(param), + std::forward<Params>(params)...}); +} + + + + + + + + +/*************************************************************************//** + * + * @brief parsing implementation details + * + *****************************************************************************/ + +namespace detail { + + +/*************************************************************************//** + * + * @brief DFS traverser that keeps track of 'scopes' + * scope = all parameters that are either bounded by + * two blocking parameters on the same depth level + * or the beginning/end of the outermost group + * + *****************************************************************************/ +class scoped_dfs_traverser +{ +public: + using dfs_traverser = group::depth_first_traverser; + + scoped_dfs_traverser() = default; + + explicit + scoped_dfs_traverser(const group& g): + pos_{g}, lastMatch_{}, posAfterLastMatch_{}, scopes_{}, + ignoreBlocks_{false}, + repeatGroupStarted_{false}, repeatGroupContinues_{false} + {} + + const dfs_traverser& base() const noexcept { return pos_; } + const dfs_traverser& last_match() const noexcept { return lastMatch_; } + + const group& parent() const noexcept { return pos_.parent(); } + + const group* innermost_repeat_group() const noexcept { + return pos_.innermost_repeat_group(); + } + const group* outermost_join_group() const noexcept { + return pos_.outermost_join_group(); + } + const group* innermost_blocking_group() const noexcept { + return pos_.innermost_blocking_group(); + } + const group* innermost_exclusive_group() const noexcept { + return pos_.innermost_exclusive_group(); + } + + const pattern* operator ->() const noexcept { return pos_.operator->(); } + const pattern& operator *() const noexcept { return *pos_; } + + const pattern* ptr() const noexcept { return pos_.operator->(); } + + explicit operator bool() const noexcept { return bool(pos_); } + + bool joinable() const noexcept { return pos_.joinable(); } + arg_string common_flag_prefix() const { return pos_.common_flag_prefix(); } + + void ignore_blocking(bool yes) { ignoreBlocks_ = yes; } + + void invalidate() { + pos_.invalidate(); + } + + bool matched() const noexcept { + return (pos_ == lastMatch_); + } + + bool start_of_repeat_group() const noexcept { return repeatGroupStarted_; } + + //----------------------------------------------------- + scoped_dfs_traverser& + next_sibling() { pos_.next_sibling(); return *this; } + + scoped_dfs_traverser& + next_after_siblings() { pos_.next_after_siblings(); return *this; } + + + //----------------------------------------------------- + scoped_dfs_traverser& + operator ++ () + { + if(!pos_) return *this; + + if(pos_.is_last_in_path()) { + return_to_outermost_scope(); + return *this; + } + + //current pattern can block if it didn't match already + if(ignoreBlocks_ || matched()) { + ++pos_; + } + else if(!pos_->is_group()) { + //current group can block if we didn't have any match in it + const group* g = pos_.outermost_blocking_group_fully_explored(); + //no match in 'g' before -> skip to after its siblings + if(g && !lastMatch_.is_inside(g)) { + pos_.back_to_ancestor(g).next_after_siblings(); + if(!pos_) return_to_outermost_scope(); + } + else if(pos_->blocking()) { + if(pos_.parent().exclusive()) { + pos_.next_sibling(); + } else { + //no match => skip siblings of blocking param + pos_.next_after_siblings(); + } + if(!pos_) return_to_outermost_scope(); + } else { + ++pos_; + } + } else { + ++pos_; + } + check_if_left_scope(); + return *this; + } + + //----------------------------------------------------- + void next_after_match(scoped_dfs_traverser match) + { + if(!match || ignoreBlocks_) return; + + check_repeat_group_start(match); + + lastMatch_ = match.base(); + + // if there is a blocking ancestor -> go back to it + if(!match->blocking()) { + match.pos_.back_to_ancestor(match.innermost_blocking_group()); + } + + //if match is not in current position & current position is blocking + //=> current position has to be advanced by one so that it is + //no longer reachable within current scope + //(can happen for repeatable, blocking parameters) + if(match.base() != pos_ && pos_->blocking()) pos_.next_sibling(); + + if(match->blocking()) { + if(match.pos_.is_alternative()) { + //discard other alternatives + match.pos_.skip_alternatives(); + } + + if(is_last_in_current_scope(match.pos_)) { + //if current param is not repeatable -> back to previous scope + if(!match->repeatable() && !match->is_group()) { + pos_ = std::move(match.pos_); + if(!scopes_.empty()) pos_.undo(scopes_.top()); + } + else { //stay at match position + pos_ = std::move(match.pos_); + } + } + else { //not last in current group + //if current param is not repeatable, go directly to next + if(!match->repeatable() && !match->is_group()) { + ++match.pos_; + } + + if(match.pos_.level() > pos_.level()) { + scopes_.push(pos_.undo_point()); + pos_ = std::move(match.pos_); + } + else if(match.pos_.level() < pos_.level()) { + return_to_level(match.pos_.level()); + } + else { + pos_ = std::move(match.pos_); + } + } + posAfterLastMatch_ = pos_; + } + else { + if(match.pos_.level() < pos_.level()) { + return_to_level(match.pos_.level()); + } + posAfterLastMatch_ = pos_; + } + repeatGroupContinues_ = repeat_group_continues(); + } + +private: + //----------------------------------------------------- + bool is_last_in_current_scope(const dfs_traverser& pos) const + { + if(scopes_.empty()) return pos.is_last_in_path(); + //check if we would leave the current scope on ++ + auto p = pos; + ++p; + return p.level() < scopes_.top().level(); + } + + //----------------------------------------------------- + void check_repeat_group_start(const scoped_dfs_traverser& newMatch) + { + const auto newrg = newMatch.innermost_repeat_group(); + if(!newrg) { + repeatGroupStarted_ = false; + } + else if(lastMatch_.innermost_repeat_group() != newrg) { + repeatGroupStarted_ = true; + } + else if(!repeatGroupContinues_ || !newMatch.repeatGroupContinues_) { + repeatGroupStarted_ = true; + } + else { + //special case: repeat group is outermost group + //=> we can never really 'leave' and 'reenter' it + //but if the current scope is the first element, then we are + //conceptually at a position 'before' the group + repeatGroupStarted_ = scopes_.empty() || ( + newrg == pos_.root() && + scopes_.top().param() == &(*pos_.root()->begin()) ); + } + repeatGroupContinues_ = repeatGroupStarted_; + } + + //----------------------------------------------------- + bool repeat_group_continues() const + { + if(!repeatGroupContinues_) return false; + const auto curRepGroup = pos_.innermost_repeat_group(); + if(!curRepGroup) return false; + if(curRepGroup != lastMatch_.innermost_repeat_group()) return false; + if(!posAfterLastMatch_) return false; + return true; + } + + //----------------------------------------------------- + void check_if_left_scope() + { + if(posAfterLastMatch_) { + if(pos_.level() < posAfterLastMatch_.level()) { + while(!scopes_.empty() && scopes_.top().level() >= pos_.level()) { + pos_.undo(scopes_.top()); + scopes_.pop(); + } + posAfterLastMatch_.invalidate(); + } + } + while(!scopes_.empty() && scopes_.top().level() > pos_.level()) { + pos_.undo(scopes_.top()); + scopes_.pop(); + } + repeatGroupContinues_ = repeat_group_continues(); + } + + //----------------------------------------------------- + void return_to_outermost_scope() + { + posAfterLastMatch_.invalidate(); + + if(scopes_.empty()) { + pos_.invalidate(); + repeatGroupContinues_ = false; + return; + } + + while(!scopes_.empty() && (!pos_ || pos_.level() >= 1)) { + pos_.undo(scopes_.top()); + scopes_.pop(); + } + while(!scopes_.empty()) scopes_.pop(); + + repeatGroupContinues_ = repeat_group_continues(); + } + + //----------------------------------------------------- + void return_to_level(int level) + { + if(pos_.level() <= level) return; + while(!scopes_.empty() && pos_.level() > level) { + pos_.undo(scopes_.top()); + scopes_.pop(); + } + }; + + dfs_traverser pos_; + dfs_traverser lastMatch_; + dfs_traverser posAfterLastMatch_; + std::stack<dfs_traverser::memento> scopes_; + bool ignoreBlocks_ = false; + bool repeatGroupStarted_ = false; + bool repeatGroupContinues_ = false; +}; + + + + +/***************************************************************************** + * + * some parameter property predicates + * + *****************************************************************************/ +struct select_all { + bool operator () (const parameter&) const noexcept { return true; } +}; + +struct select_flags { + bool operator () (const parameter& p) const noexcept { + return !p.flags().empty(); + } +}; + +struct select_values { + bool operator () (const parameter& p) const noexcept { + return p.flags().empty(); + } +}; + + + +/*************************************************************************//** + * + * @brief result of a matching operation + * + *****************************************************************************/ +class match_t { +public: + using size_type = arg_string::size_type; + + match_t() = default; + + match_t(arg_string s, scoped_dfs_traverser p): + str_{std::move(s)}, pos_{std::move(p)} + {} + + size_type length() const noexcept { return str_.size(); } + + const arg_string& str() const noexcept { return str_; } + const scoped_dfs_traverser& pos() const noexcept { return pos_; } + + explicit operator bool() const noexcept { return bool(pos_); } + +private: + arg_string str_; + scoped_dfs_traverser pos_; +}; + + + +/*************************************************************************//** + * + * @brief finds the first parameter that matches a given string; + * candidate parameters are traversed using a scoped DFS traverser + * + *****************************************************************************/ +template<class ParamSelector> +match_t +full_match(scoped_dfs_traverser pos, const arg_string& arg, + const ParamSelector& select) +{ + while(pos) { + if(pos->is_param()) { + const auto& param = pos->as_param(); + if(select(param)) { + const auto match = param.match(arg); + if(match && match.length() == arg.size()) { + return match_t{arg, std::move(pos)}; + } + } + } + ++pos; + } + return match_t{}; +} + + + +/*************************************************************************//** + * + * @brief finds the first parameter that matches any (non-empty) prefix + * of a given string; + * candidate parameters are traversed using a scoped DFS traverser + * + *****************************************************************************/ +template<class ParamSelector> +match_t +longest_prefix_match(scoped_dfs_traverser pos, const arg_string& arg, + const ParamSelector& select) +{ + match_t longest; + + while(pos) { + if(pos->is_param()) { + const auto& param = pos->as_param(); + if(select(param)) { + auto match = param.match(arg); + if(match.prefix()) { + if(match.length() == arg.size()) { + return match_t{arg, std::move(pos)}; + } + else if(match.length() > longest.length()) { + longest = match_t{arg.substr(match.at(), match.length()), + pos}; + } + } + } + } + ++pos; + } + return longest; +} + + + +/*************************************************************************//** + * + * @brief finds the first parameter that partially matches a given string; + * candidate parameters are traversed using a scoped DFS traverser + * + *****************************************************************************/ +template<class ParamSelector> +match_t +partial_match(scoped_dfs_traverser pos, const arg_string& arg, + const ParamSelector& select) +{ + while(pos) { + if(pos->is_param()) { + const auto& param = pos->as_param(); + if(select(param)) { + const auto match = param.match(arg); + if(match) { + return match_t{arg.substr(match.at(), match.length()), + std::move(pos)}; + } + } + } + ++pos; + } + return match_t{}; +} + +} //namespace detail + + + + + + +/***************************************************************//** + * + * @brief default command line arguments parser + * + *******************************************************************/ +class parser +{ +public: + using dfs_traverser = group::depth_first_traverser; + using scoped_dfs_traverser = detail::scoped_dfs_traverser; + + + /*****************************************************//** + * @brief arg -> parameter mapping + *********************************************************/ + class arg_mapping { + public: + friend class parser; + + explicit + arg_mapping(arg_index idx, arg_string s, + const dfs_traverser& match) + : + index_{idx}, arg_{std::move(s)}, match_{match}, + repeat_{0}, startsRepeatGroup_{false}, + blocked_{false}, conflict_{false} + {} + + explicit + arg_mapping(arg_index idx, arg_string s) : + index_{idx}, arg_{std::move(s)}, match_{}, + repeat_{0}, startsRepeatGroup_{false}, + blocked_{false}, conflict_{false} + {} + + arg_index index() const noexcept { return index_; } + const arg_string& arg() const noexcept { return arg_; } + + const parameter* param() const noexcept { + return match_ && match_->is_param() + ? &(match_->as_param()) : nullptr; + } + + std::size_t repeat() const noexcept { return repeat_; } + + bool blocked() const noexcept { return blocked_; } + bool conflict() const noexcept { return conflict_; } + + bool bad_repeat() const noexcept { + if(!param()) return false; + return repeat_ > 0 && !param()->repeatable() + && !match_.innermost_repeat_group(); + } + + bool any_error() const noexcept { + return !match_ || blocked() || conflict() || bad_repeat(); + } + + private: + arg_index index_; + arg_string arg_; + dfs_traverser match_; + std::size_t repeat_; + bool startsRepeatGroup_; + bool blocked_; + bool conflict_; + }; + + /*****************************************************//** + * @brief references a non-matched, required parameter + *********************************************************/ + class missing_event { + public: + explicit + missing_event(const parameter* p, arg_index after): + param_{p}, aftIndex_{after} + {} + + const parameter* param() const noexcept { return param_; } + + arg_index after_index() const noexcept { return aftIndex_; } + + private: + const parameter* param_; + arg_index aftIndex_; + }; + + //----------------------------------------------------- + using missing_events = std::vector<missing_event>; + using arg_mappings = std::vector<arg_mapping>; + + +private: + struct miss_candidate { + miss_candidate(dfs_traverser p, arg_index idx, + bool firstInRepeatGroup = false): + pos{std::move(p)}, index{idx}, + startsRepeatGroup{firstInRepeatGroup} + {} + + dfs_traverser pos; + arg_index index; + bool startsRepeatGroup; + }; + using miss_candidates = std::vector<miss_candidate>; + + +public: + //--------------------------------------------------------------- + /** @brief initializes parser with a command line interface + * @param offset = argument index offset used for reports + * */ + explicit + parser(const group& root, arg_index offset = 0): + root_{&root}, pos_{root}, + index_{offset-1}, eaten_{0}, + args_{}, missCand_{}, blocked_{false} + { + for_each_potential_miss(dfs_traverser{root}, + [this](const dfs_traverser& p){ + missCand_.emplace_back(p, index_); + }); + } + + + //--------------------------------------------------------------- + /** @brief processes one command line argument */ + bool operator() (const arg_string& arg) + { + ++eaten_; + ++index_; + + if(!valid()) return false; + + if(!blocked_ && try_match(arg)) return true; + + if(try_match_blocked(arg)) return false; + + //skipping of blocking & required patterns is not allowed + if(!blocked_ && !pos_.matched() && pos_->required() && pos_->blocking()) { + blocked_ = true; + } + + add_nomatch(arg); + return false; + } + + + //--------------------------------------------------------------- + /** @brief returns range of argument -> parameter mappings */ + const arg_mappings& args() const { + return args_; + } + + /** @brief returns list of missing events */ + missing_events missed() const { + missing_events misses; + misses.reserve(missCand_.size()); + for(auto i = missCand_.begin(); i != missCand_.end(); ++i) { + misses.emplace_back(&(i->pos->as_param()), i->index); + } + return misses; + } + + /** @brief returns number of processed command line arguments */ + arg_index parse_count() const noexcept { return eaten_; } + + /** @brief returns false if previously processed command line arguments + * lead to an invalid / inconsistent parsing result + */ + bool valid() const noexcept { return bool(pos_); } + + /** @brief returns false if previously processed command line arguments + * lead to an invalid / inconsistent parsing result + */ + explicit operator bool() const noexcept { return valid(); } + + +private: + //--------------------------------------------------------------- + using match_t = detail::match_t; + + + //--------------------------------------------------------------- + /** @brief try to match argument with unreachable parameter */ + bool try_match_blocked(const arg_string& arg) + { + //try to match ahead (using temporary parser) + if(pos_) { + auto ahead = *this; + if(try_match_blocked(std::move(ahead), arg)) return true; + } + + //try to match from the beginning (using temporary parser) + if(root_) { + parser all{*root_, index_+1}; + if(try_match_blocked(std::move(all), arg)) return true; + } + + return false; + } + + //--------------------------------------------------------------- + bool try_match_blocked(parser&& parse, const arg_string& arg) + { + const auto nold = int(parse.args_.size()); + + parse.pos_.ignore_blocking(true); + + if(!parse.try_match(arg)) return false; + + for(auto i = parse.args_.begin() + nold; i != parse.args_.end(); ++i) { + args_.push_back(*i); + args_.back().blocked_ = true; + } + return true; + } + + //--------------------------------------------------------------- + /** @brief try to find a parameter/pattern that matches 'arg' */ + bool try_match(const arg_string& arg) + { + //match greedy parameters before everything else + if(pos_->is_param() && pos_->blocking() && pos_->as_param().greedy()) { + const auto match = pos_->as_param().match(arg); + if(match && match.length() == arg.size()) { + add_match(detail::match_t{arg,pos_}); + return true; + } + } + + //try flags first (alone, joinable or strict sequence) + if(try_match_full(arg, detail::select_flags{})) return true; + if(try_match_joined_flags(arg)) return true; + if(try_match_joined_sequence(arg, detail::select_flags{})) return true; + //try value params (alone or strict sequence) + if(try_match_full(arg, detail::select_values{})) return true; + if(try_match_joined_sequence(arg, detail::select_all{})) return true; + //try joinable params + values in any order + if(try_match_joined_params(arg)) return true; + return false; + } + + //--------------------------------------------------------------- + /** + * @brief try to match full argument + * @param select : predicate that candidate parameters must satisfy + */ + template<class ParamSelector> + bool try_match_full(const arg_string& arg, const ParamSelector& select) + { + auto match = detail::full_match(pos_, arg, select); + if(!match) return false; + add_match(match); + return true; + } + + //--------------------------------------------------------------- + /** + * @brief try to match argument as blocking sequence of parameters + * @param select : predicate that a parameter matching the prefix of + * 'arg' must satisfy + */ + template<class ParamSelector> + bool try_match_joined_sequence(arg_string arg, + const ParamSelector& acceptFirst) + { + auto fstMatch = detail::longest_prefix_match(pos_, arg, acceptFirst); + + if(!fstMatch) return false; + + if(fstMatch.str().size() == arg.size()) { + add_match(fstMatch); + return true; + } + + if(!fstMatch.pos()->blocking()) return false; + + auto pos = fstMatch.pos(); + pos.ignore_blocking(true); + const auto parent = &pos.parent(); + if(!pos->repeatable()) ++pos; + + arg.erase(0, fstMatch.str().size()); + std::vector<match_t> matches { std::move(fstMatch) }; + + while(!arg.empty() && pos && + pos->blocking() && pos->is_param() && + (&pos.parent() == parent)) + { + auto match = pos->as_param().match(arg); + + if(match.prefix()) { + matches.emplace_back(arg.substr(0,match.length()), pos); + arg.erase(0, match.length()); + if(!pos->repeatable()) ++pos; + } + else { + if(!pos->repeatable()) return false; + ++pos; + } + + } + //if arg not fully covered => discard temporary matches + if(!arg.empty() || matches.empty()) return false; + + for(const auto& m : matches) add_match(m); + return true; + } + + //----------------------------------------------------- + /** @brief try to match 'arg' as a concatenation of joinable flags */ + bool try_match_joined_flags(const arg_string& arg) + { + return find_join_group(pos_, [&](const group& g) { + return try_match_joined(g, arg, detail::select_flags{}, + g.common_flag_prefix()); + }); + } + + //--------------------------------------------------------------- + /** @brief try to match 'arg' as a concatenation of joinable parameters */ + bool try_match_joined_params(const arg_string& arg) + { + return find_join_group(pos_, [&](const group& g) { + return try_match_joined(g, arg, detail::select_all{}); + }); + } + + //----------------------------------------------------- + /** @brief try to match 'arg' as concatenation of joinable parameters + * that are all contained within one group + */ + template<class ParamSelector> + bool try_match_joined(const group& joinGroup, arg_string arg, + const ParamSelector& select, + const arg_string& prefix = "") + { + //temporary parser with 'joinGroup' as top-level group + parser parse {joinGroup}; + //records temporary matches + std::vector<match_t> matches; + + while(!arg.empty()) { + auto match = detail::longest_prefix_match(parse.pos_, arg, select); + + if(!match) return false; + + arg.erase(0, match.str().size()); + //make sure prefix is always present after the first match + //so that, e.g., flags "-a" and "-b" will be found in "-ab" + if(!arg.empty() && !prefix.empty() && arg.find(prefix) != 0 && + prefix != match.str()) + { + arg.insert(0,prefix); + } + + parse.add_match(match); + matches.push_back(std::move(match)); + } + + if(!arg.empty() || matches.empty()) return false; + + if(!parse.missCand_.empty()) return false; + for(const auto& a : parse.args_) if(a.any_error()) return false; + + //replay matches onto *this + for(const auto& m : matches) add_match(m); + return true; + } + + //----------------------------------------------------- + template<class GroupSelector> + bool find_join_group(const scoped_dfs_traverser& start, + const GroupSelector& accept) const + { + if(start && start.parent().joinable()) { + const auto& g = start.parent(); + if(accept(g)) return true; + return false; + } + + auto pos = start; + while(pos) { + if(pos->is_group() && pos->as_group().joinable()) { + const auto& g = pos->as_group(); + if(accept(g)) return true; + pos.next_sibling(); + } + else { + ++pos; + } + } + return false; + } + + + //--------------------------------------------------------------- + void add_nomatch(const arg_string& arg) { + args_.emplace_back(index_, arg); + } + + + //--------------------------------------------------------------- + void add_match(const match_t& match) + { + const auto& pos = match.pos(); + if(!pos || !pos->is_param()) return; + + pos_.next_after_match(pos); + + arg_mapping newArg{index_, match.str(), pos.base()}; + newArg.repeat_ = occurrences_of(&pos->as_param()); + newArg.conflict_ = check_conflicts(pos.base()); + newArg.startsRepeatGroup_ = pos_.start_of_repeat_group(); + args_.push_back(std::move(newArg)); + + add_miss_candidates_after(pos); + clean_miss_candidates_for(pos.base()); + discard_alternative_miss_candidates(pos.base()); + + } + + //----------------------------------------------------- + bool check_conflicts(const dfs_traverser& match) + { + if(pos_.start_of_repeat_group()) return false; + bool conflict = false; + for(const auto& m : match.stack()) { + if(m.parent->exclusive()) { + for(auto i = args_.rbegin(); i != args_.rend(); ++i) { + if(!i->blocked()) { + for(const auto& c : i->match_.stack()) { + //sibling within same exclusive group => conflict + if(c.parent == m.parent && c.cur != m.cur) { + conflict = true; + i->conflict_ = true; + } + } + } + //check for conflicts only within current repeat cycle + if(i->startsRepeatGroup_) break; + } + } + } + return conflict; + } + + //----------------------------------------------------- + void clean_miss_candidates_for(const dfs_traverser& match) + { + auto i = std::find_if(missCand_.rbegin(), missCand_.rend(), + [&](const miss_candidate& m) { + return &(*m.pos) == &(*match); + }); + + if(i != missCand_.rend()) { + missCand_.erase(prev(i.base())); + } + } + + //----------------------------------------------------- + void discard_alternative_miss_candidates(const dfs_traverser& match) + { + if(missCand_.empty()) return; + //find out, if miss candidate is sibling of one of the same + //alternative groups that the current match is a member of + //if so, we can discard the miss + + //go through all exclusive groups of matching pattern + for(const auto& m : match.stack()) { + if(m.parent->exclusive()) { + for(auto i = int(missCand_.size())-1; i >= 0; --i) { + bool removed = false; + for(const auto& c : missCand_[i].pos.stack()) { + //sibling within same exclusive group => discard + if(c.parent == m.parent && c.cur != m.cur) { + missCand_.erase(missCand_.begin() + i); + if(missCand_.empty()) return; + removed = true; + break; + } + } + //remove miss candidates only within current repeat cycle + if(i > 0 && removed) { + if(missCand_[i-1].startsRepeatGroup) break; + } else { + if(missCand_[i].startsRepeatGroup) break; + } + } + } + } + } + + //----------------------------------------------------- + void add_miss_candidates_after(const scoped_dfs_traverser& match) + { + auto npos = match.base(); + if(npos.is_alternative()) npos.skip_alternatives(); + ++npos; + //need to add potential misses if: + //either new repeat group was started + const auto newRepGroup = match.innermost_repeat_group(); + if(newRepGroup) { + if(pos_.start_of_repeat_group()) { + for_each_potential_miss(std::move(npos), + [&,this](const dfs_traverser& pos) { + //only add candidates within repeat group + if(newRepGroup == pos.innermost_repeat_group()) { + missCand_.emplace_back(pos, index_, true); + } + }); + } + } + //... or an optional blocking param was hit + else if(match->blocking() && !match->required() && + npos.level() >= match.base().level()) + { + for_each_potential_miss(std::move(npos), + [&,this](const dfs_traverser& pos) { + //only add new candidates + if(std::find_if(missCand_.begin(), missCand_.end(), + [&](const miss_candidate& c){ + return &(*c.pos) == &(*pos); + }) == missCand_.end()) + { + missCand_.emplace_back(pos, index_); + } + }); + } + + } + + //----------------------------------------------------- + template<class Action> + static void + for_each_potential_miss(dfs_traverser pos, Action&& action) + { + const auto level = pos.level(); + while(pos && pos.level() >= level) { + if(pos->is_group() ) { + const auto& g = pos->as_group(); + if(g.all_optional() || (g.exclusive() && g.any_optional())) { + pos.next_sibling(); + } else { + ++pos; + } + } else { //param + if(pos->required()) { + action(pos); + ++pos; + } else if(pos->blocking()) { //optional + blocking + pos.next_after_siblings(); + } else { + ++pos; + } + } + } + } + + + //--------------------------------------------------------------- + std::size_t occurrences_of(const parameter* p) const + { + if(!p) return 0; + + auto i = std::find_if(args_.rbegin(), args_.rend(), + [p](const arg_mapping& a){ return a.param() == p; }); + + if(i != args_.rend()) return i->repeat() + 1; + return 0; + } + + + //--------------------------------------------------------------- + const group* root_; + scoped_dfs_traverser pos_; + arg_index index_; + arg_index eaten_; + arg_mappings args_; + miss_candidates missCand_; + bool blocked_; +}; + + + + +/*************************************************************************//** + * + * @brief contains argument -> parameter mappings + * and missing parameters + * + *****************************************************************************/ +class parsing_result +{ +public: + using arg_mapping = parser::arg_mapping; + using arg_mappings = parser::arg_mappings; + using missing_event = parser::missing_event; + using missing_events = parser::missing_events; + using iterator = arg_mappings::const_iterator; + + //----------------------------------------------------- + /** @brief default: empty result */ + parsing_result() = default; + + parsing_result(arg_mappings arg2param, missing_events misses): + arg2param_{std::move(arg2param)}, missing_{std::move(misses)} + {} + + //----------------------------------------------------- + /** @brief returns number of arguments that could not be mapped to + * a parameter + */ + arg_mappings::size_type + unmapped_args_count() const noexcept { + return std::count_if(arg2param_.begin(), arg2param_.end(), + [](const arg_mapping& a){ return !a.param(); }); + } + + /** @brief returns if any argument could only be matched by an + * unreachable parameter + */ + bool any_blocked() const noexcept { + return std::any_of(arg2param_.begin(), arg2param_.end(), + [](const arg_mapping& a){ return a.blocked(); }); + } + + /** @brief returns if any argument matched more than one parameter + * that were mutually exclusive */ + bool any_conflict() const noexcept { + return std::any_of(arg2param_.begin(), arg2param_.end(), + [](const arg_mapping& a){ return a.conflict(); }); + } + + /** @brief returns if any parameter matched repeatedly although + * it was not allowed to */ + bool any_bad_repeat() const noexcept { + return std::any_of(arg2param_.begin(), arg2param_.end(), + [](const arg_mapping& a){ return a.bad_repeat(); }); + } + + /** @brief returns true if any parsing error / violation of the + * command line interface definition occurred */ + bool any_error() const noexcept { + return unmapped_args_count() > 0 || !missing().empty() || + any_blocked() || any_conflict() || any_bad_repeat(); + } + + /** @brief returns true if no parsing error / violation of the + * command line interface definition occurred */ + explicit operator bool() const noexcept { return !any_error(); } + + /** @brief access to range of missing parameter match events */ + const missing_events& missing() const noexcept { return missing_; } + + /** @brief returns non-mutating iterator to position of + * first argument -> parameter mapping */ + iterator begin() const noexcept { return arg2param_.begin(); } + /** @brief returns non-mutating iterator to position one past the + * last argument -> parameter mapping */ + iterator end() const noexcept { return arg2param_.end(); } + +private: + //----------------------------------------------------- + arg_mappings arg2param_; + missing_events missing_; +}; + + + + +namespace detail { +namespace { + +/*************************************************************************//** + * + * @brief correct some common problems + * does not - and MUST NOT - change the number of arguments + * (no insertions or deletions allowed) + * + *****************************************************************************/ +void sanitize_args(arg_list& args) +{ + //e.g. {"-o12", ".34"} -> {"-o", "12.34"} + + if(args.empty()) return; + + for(auto i = begin(args)+1; i != end(args); ++i) { + if(i != begin(args) && i->size() > 1 && + i->find('.') == 0 && std::isdigit((*i)[1]) ) + { + //find trailing digits in previous arg + using std::prev; + auto& prv = *prev(i); + auto fstDigit = std::find_if_not(prv.rbegin(), prv.rend(), + [](arg_string::value_type c){ + return std::isdigit(c); + }).base(); + + //handle leading sign + if(fstDigit > prv.begin() && + (*prev(fstDigit) == '+' || *prev(fstDigit) == '-')) + { + --fstDigit; + } + + //prepend digits from previous arg + i->insert(begin(*i), fstDigit, end(prv)); + + //erase digits in previous arg + prv.erase(fstDigit, end(prv)); + } + } +} + + + +/*************************************************************************//** + * + * @brief executes actions based on a parsing result + * + *****************************************************************************/ +void execute_actions(const parsing_result& res) +{ + for(const auto& m : res) { + if(m.param()) { + const auto& param = *(m.param()); + + if(m.repeat() > 0) param.notify_repeated(m.index()); + if(m.blocked()) param.notify_blocked(m.index()); + if(m.conflict()) param.notify_conflict(m.index()); + //main action + if(!m.any_error()) param.execute_actions(m.arg()); + } + } + + for(auto m : res.missing()) { + if(m.param()) m.param()->notify_missing(m.after_index()); + } +} + + + +/*************************************************************************//** + * + * @brief parses input args + * + *****************************************************************************/ +static parsing_result +parse_args(const arg_list& args, const group& cli, + arg_index offset = 0) +{ + //parse args and store unrecognized arg indices + parser parse{cli, offset}; + for(const auto& arg : args) { + parse(arg); + if(!parse.valid()) break; + } + + return parsing_result{parse.args(), parse.missed()}; +} + +/*************************************************************************//** + * + * @brief parses input args & executes actions + * + *****************************************************************************/ +static parsing_result +parse_and_execute(const arg_list& args, const group& cli, + arg_index offset = 0) +{ + auto result = parse_args(args, cli, offset); + + execute_actions(result); + + return result; +} + +} //anonymous namespace +} // namespace detail + + + + +/*************************************************************************//** + * + * @brief parses vector of arg strings and executes actions + * + *****************************************************************************/ +inline parsing_result +parse(arg_list args, const group& cli) +{ + detail::sanitize_args(args); + return detail::parse_and_execute(args, cli); +} + + +/*************************************************************************//** + * + * @brief parses initializer_list of C-style arg strings and executes actions + * + *****************************************************************************/ +inline parsing_result +parse(std::initializer_list<const char*> arglist, const group& cli) +{ + arg_list args; + args.reserve(arglist.size()); + for(auto a : arglist) { + args.push_back(a); + } + + return parse(std::move(args), cli); +} + + +/*************************************************************************//** + * + * @brief parses range of arg strings and executes actions + * + *****************************************************************************/ +template<class InputIterator> +inline parsing_result +parse(InputIterator first, InputIterator last, const group& cli) +{ + return parse(arg_list(first,last), cli); +} + + +/*************************************************************************//** + * + * @brief parses the standard array of command line arguments; omits argv[0] + * + *****************************************************************************/ +inline parsing_result +parse(const int argc, char* argv[], const group& cli, arg_index offset = 1) +{ + arg_list args; + if(offset < argc) args.assign(argv+offset, argv+argc); + detail::sanitize_args(args); + return detail::parse_and_execute(args, cli, offset); +} + + + + + + +/*************************************************************************//** + * + * @brief filter predicate for parameters and groups; + * Can be used to limit documentation generation to parameter subsets. + * + *****************************************************************************/ +class param_filter +{ +public: + /** @brief only allow parameters with given prefix */ + param_filter& prefix(const arg_string& p) noexcept { + prefix_ = p; return *this; + } + /** @brief only allow parameters with given prefix */ + param_filter& prefix(arg_string&& p) noexcept { + prefix_ = std::move(p); return *this; + } + const arg_string& prefix() const noexcept { return prefix_; } + + /** @brief only allow parameters with given requirement status */ + param_filter& required(tri t) noexcept { required_ = t; return *this; } + tri required() const noexcept { return required_; } + + /** @brief only allow parameters with given blocking status */ + param_filter& blocking(tri t) noexcept { blocking_ = t; return *this; } + tri blocking() const noexcept { return blocking_; } + + /** @brief only allow parameters with given repeatable status */ + param_filter& repeatable(tri t) noexcept { repeatable_ = t; return *this; } + tri repeatable() const noexcept { return repeatable_; } + + /** @brief only allow parameters with given docstring status */ + param_filter& has_doc(tri t) noexcept { hasDoc_ = t; return *this; } + tri has_doc() const noexcept { return hasDoc_; } + + + /** @brief returns true, if parameter satisfies all filters */ + bool operator() (const parameter& p) const noexcept { + if(!prefix_.empty()) { + if(!std::any_of(p.flags().begin(), p.flags().end(), + [&](const arg_string& flag){ + return str::has_prefix(flag, prefix_); + })) return false; + } + if(required() != p.required()) return false; + if(blocking() != p.blocking()) return false; + if(repeatable() != p.repeatable()) return false; + if(has_doc() != !p.doc().empty()) return false; + return true; + } + +private: + arg_string prefix_; + tri required_ = tri::either; + tri blocking_ = tri::either; + tri repeatable_ = tri::either; + tri hasDoc_ = tri::yes; +}; + + + + + + +/*************************************************************************//** + * + * @brief documentation formatting options + * + *****************************************************************************/ +class doc_formatting +{ +public: + using string = doc_string; + + /** @brief same as 'first_column' */ +#if __cplusplus >= 201402L + [[deprecated]] +#endif + doc_formatting& start_column(int col) { return first_column(col); } +#if __cplusplus >= 201402L + [[deprecated]] +#endif + int start_column() const noexcept { return first_column(); } + + /** @brief determines column where documentation printing starts */ + doc_formatting& + first_column(int col) { + //limit to [0,last_column] but push doc_column to the right if necessary + if(col < 0) col = 0; + else if(col > last_column()) col = last_column(); + if(col > doc_column()) doc_column(first_column()); + firstCol_ = col; + return *this; + } + int first_column() const noexcept { + return firstCol_; + } + + /** @brief determines column where docstrings start */ + doc_formatting& + doc_column(int col) { + //limit to [first_column,last_column] + if(col < 0) col = 0; + else if(col < first_column()) col = first_column(); + else if(col > last_column()) col = last_column(); + docCol_ = col; + return *this; + } + int doc_column() const noexcept { + return docCol_; + } + + /** @brief determines column that no documentation text must exceed; + * (text should be wrapped appropriately after this column) + */ + doc_formatting& + last_column(int col) { + //limit to [first_column,oo] but push doc_column to the left if necessary + if(col < first_column()) col = first_column(); + if(col < doc_column()) doc_column(col); + lastCol_ = col; + return *this; + } + + int last_column() const noexcept { + return lastCol_; + } + + /** @brief determines indent of documentation lines + * for children of a documented group */ + doc_formatting& indent_size(int indent) { indentSize_ = indent; return *this; } + int indent_size() const noexcept { return indentSize_; } + + /** @brief determines string to be used + * if a parameter has no flags and no label */ + doc_formatting& empty_label(const string& label) { + emptyLabel_ = label; + return *this; + } + const string& empty_label() const noexcept { return emptyLabel_; } + + /** @brief determines string for separating parameters */ + doc_formatting& param_separator(const string& sep) { + paramSep_ = sep; + return *this; + } + const string& param_separator() const noexcept { return paramSep_; } + + /** @brief determines string for separating groups (in usage lines) */ + doc_formatting& group_separator(const string& sep) { + groupSep_ = sep; + return *this; + } + const string& group_separator() const noexcept { return groupSep_; } + + /** @brief determines string for separating alternative parameters */ + doc_formatting& alternative_param_separator(const string& sep) { + altParamSep_ = sep; + return *this; + } + const string& alternative_param_separator() const noexcept { return altParamSep_; } + + /** @brief determines string for separating alternative groups */ + doc_formatting& alternative_group_separator(const string& sep) { + altGroupSep_ = sep; + return *this; + } + const string& alternative_group_separator() const noexcept { return altGroupSep_; } + + /** @brief determines string for separating flags of the same parameter */ + doc_formatting& flag_separator(const string& sep) { + flagSep_ = sep; + return *this; + } + const string& flag_separator() const noexcept { return flagSep_; } + + /** @brief determines strings surrounding parameter labels */ + doc_formatting& + surround_labels(const string& prefix, const string& postfix) { + labelPre_ = prefix; + labelPst_ = postfix; + return *this; + } + const string& label_prefix() const noexcept { return labelPre_; } + const string& label_postfix() const noexcept { return labelPst_; } + + /** @brief determines strings surrounding optional parameters/groups */ + doc_formatting& + surround_optional(const string& prefix, const string& postfix) { + optionPre_ = prefix; + optionPst_ = postfix; + return *this; + } + const string& optional_prefix() const noexcept { return optionPre_; } + const string& optional_postfix() const noexcept { return optionPst_; } + + /** @brief determines strings surrounding repeatable parameters/groups */ + doc_formatting& + surround_repeat(const string& prefix, const string& postfix) { + repeatPre_ = prefix; + repeatPst_ = postfix; + return *this; + } + const string& repeat_prefix() const noexcept { return repeatPre_; } + const string& repeat_postfix() const noexcept { return repeatPst_; } + + /** @brief determines strings surrounding exclusive groups */ + doc_formatting& + surround_alternatives(const string& prefix, const string& postfix) { + alternPre_ = prefix; + alternPst_ = postfix; + return *this; + } + const string& alternatives_prefix() const noexcept { return alternPre_; } + const string& alternatives_postfix() const noexcept { return alternPst_; } + + /** @brief determines strings surrounding alternative flags */ + doc_formatting& + surround_alternative_flags(const string& prefix, const string& postfix) { + alternFlagPre_ = prefix; + alternFlagPst_ = postfix; + return *this; + } + const string& alternative_flags_prefix() const noexcept { return alternFlagPre_; } + const string& alternative_flags_postfix() const noexcept { return alternFlagPst_; } + + /** @brief determines strings surrounding non-exclusive groups */ + doc_formatting& + surround_group(const string& prefix, const string& postfix) { + groupPre_ = prefix; + groupPst_ = postfix; + return *this; + } + const string& group_prefix() const noexcept { return groupPre_; } + const string& group_postfix() const noexcept { return groupPst_; } + + /** @brief determines strings surrounding joinable groups */ + doc_formatting& + surround_joinable(const string& prefix, const string& postfix) { + joinablePre_ = prefix; + joinablePst_ = postfix; + return *this; + } + const string& joinable_prefix() const noexcept { return joinablePre_; } + const string& joinable_postfix() const noexcept { return joinablePst_; } + + /** @brief determines maximum number of flags per parameter to be printed + * in detailed parameter documentation lines */ + doc_formatting& max_flags_per_param_in_doc(int max) { + maxAltInDocs_ = max > 0 ? max : 0; + return *this; + } + int max_flags_per_param_in_doc() const noexcept { return maxAltInDocs_; } + + /** @brief determines maximum number of flags per parameter to be printed + * in usage lines */ + doc_formatting& max_flags_per_param_in_usage(int max) { + maxAltInUsage_ = max > 0 ? max : 0; + return *this; + } + int max_flags_per_param_in_usage() const noexcept { return maxAltInUsage_; } + + /** @brief determines number of empty rows after one single-line + * documentation entry */ + doc_formatting& line_spacing(int lines) { + lineSpc_ = lines > 0 ? lines : 0; + return *this; + } + int line_spacing() const noexcept { return lineSpc_; } + + /** @brief determines number of empty rows before and after a paragraph; + * a paragraph is defined by a documented group or if + * a parameter documentation entry used more than one line */ + doc_formatting& paragraph_spacing(int lines) { + paragraphSpc_ = lines > 0 ? lines : 0; + return *this; + } + int paragraph_spacing() const noexcept { return paragraphSpc_; } + + /** @brief determines if alternative flags with a common prefix should + * be printed in a merged fashion */ + doc_formatting& merge_alternative_flags_with_common_prefix(bool yes = true) { + mergeAltCommonPfx_ = yes; + return *this; + } + bool merge_alternative_flags_with_common_prefix() const noexcept { + return mergeAltCommonPfx_; + } + + /** @brief determines if joinable flags with a common prefix should + * be printed in a merged fashion */ + doc_formatting& merge_joinable_with_common_prefix(bool yes = true) { + mergeJoinableCommonPfx_ = yes; + return *this; + } + bool merge_joinable_with_common_prefix() const noexcept { + return mergeJoinableCommonPfx_; + } + + /** @brief determines if children of exclusive groups should be printed + * on individual lines if the exceed 'alternatives_min_split_size' + */ + doc_formatting& split_alternatives(bool yes = true) { + splitTopAlt_ = yes; + return *this; + } + bool split_alternatives() const noexcept { + return splitTopAlt_; + } + + /** @brief determines how many children exclusive groups can have before + * their children are printed on individual usage lines */ + doc_formatting& alternatives_min_split_size(int size) { + groupSplitSize_ = size > 0 ? size : 0; + return *this; + } + int alternatives_min_split_size() const noexcept { return groupSplitSize_; } + + /** @brief determines whether to ignore new line characters in docstrings + */ + doc_formatting& ignore_newline_chars(bool yes = true) { + ignoreNewlines_ = yes; + return *this; + } + bool ignore_newline_chars() const noexcept { + return ignoreNewlines_; + } + +private: + string paramSep_ = string(" "); + string groupSep_ = string(" "); + string altParamSep_ = string("|"); + string altGroupSep_ = string(" | "); + string flagSep_ = string(", "); + string labelPre_ = string("<"); + string labelPst_ = string(">"); + string optionPre_ = string("["); + string optionPst_ = string("]"); + string repeatPre_ = string(""); + string repeatPst_ = string("..."); + string groupPre_ = string("("); + string groupPst_ = string(")"); + string alternPre_ = string("("); + string alternPst_ = string(")"); + string alternFlagPre_ = string(""); + string alternFlagPst_ = string(""); + string joinablePre_ = string("("); + string joinablePst_ = string(")"); + string emptyLabel_ = string(""); + int firstCol_ = 8; + int docCol_ = 20; + int lastCol_ = 100; + int indentSize_ = 4; + int maxAltInUsage_ = 1; + int maxAltInDocs_ = 32; + int lineSpc_ = 0; + int paragraphSpc_ = 1; + int groupSplitSize_ = 3; + bool splitTopAlt_ = true; + bool mergeAltCommonPfx_ = false; + bool mergeJoinableCommonPfx_ = true; + bool ignoreNewlines_ = false; +}; + + + +namespace detail { + +/*************************************************************************//** + * + * @brief stream decorator + * that applies formatting like line wrapping + * + *****************************************************************************/ +template<class OStream = std::ostream, class StringT = doc_string> +class formatting_ostream +{ +public: + using string_type = StringT; + using size_type = typename string_type::size_type; + using char_type = typename string_type::value_type; + + formatting_ostream(OStream& os): + os_(os), + curCol_{0}, firstCol_{0}, lastCol_{100}, + hangingIndent_{0}, paragraphSpacing_{0}, paragraphSpacingThreshold_{2}, + curBlankLines_{0}, curParagraphLines_{1}, + totalNonBlankLines_{0}, + ignoreInputNls_{false} + {} + + + //--------------------------------------------------------------- + const OStream& base() const noexcept { return os_; } + OStream& base() noexcept { return os_; } + + bool good() const { return os_.good(); } + + + //--------------------------------------------------------------- + /** @brief determines the leftmost border of the text body */ + formatting_ostream& first_column(int c) { + firstCol_ = c < 0 ? 0 : c; + return *this; + } + int first_column() const noexcept { return firstCol_; } + + /** @brief determines the rightmost border of the text body */ + formatting_ostream& last_column(int c) { + lastCol_ = c < 0 ? 0 : c; + return *this; + } + + int last_column() const noexcept { return lastCol_; } + + int text_width() const noexcept { + return lastCol_ - firstCol_; + } + + /** @brief additional indentation for the 2nd, 3rd, ... line of + a paragraph (sequence of soft-wrapped lines) */ + formatting_ostream& hanging_indent(int amount) { + hangingIndent_ = amount; + return *this; + } + int hanging_indent() const noexcept { + return hangingIndent_; + } + + /** @brief amount of blank lines between paragraphs */ + formatting_ostream& paragraph_spacing(int lines) { + paragraphSpacing_ = lines; + return *this; + } + int paragraph_spacing() const noexcept { + return paragraphSpacing_; + } + + /** @brief insert paragraph spacing + if paragraph is at least 'lines' lines long */ + formatting_ostream& min_paragraph_lines_for_spacing(int lines) { + paragraphSpacingThreshold_ = lines; + return *this; + } + int min_paragraph_lines_for_spacing() const noexcept { + return paragraphSpacingThreshold_; + } + + /** @brief if set to true, newline characters will be ignored */ + formatting_ostream& ignore_newline_chars(bool yes) { + ignoreInputNls_ = yes; + return *this; + } + + bool ignore_newline_chars() const noexcept { + return ignoreInputNls_; + } + + + //--------------------------------------------------------------- + /* @brief insert 'n' spaces */ + void write_spaces(int n) { + if(n < 1) return; + os_ << string_type(size_type(n), ' '); + curCol_ += n; + } + + /* @brief go to new line, but continue current paragraph */ + void wrap_soft(int times = 1) { + if(times < 1) return; + if(times > 1) { + os_ << string_type(size_type(times), '\n'); + } else { + os_ << '\n'; + } + curCol_ = 0; + ++curParagraphLines_; + } + + /* @brief go to new line, and start a new paragraph */ + void wrap_hard(int times = 1) { + if(times < 1) return; + + if(paragraph_spacing() > 0 && + paragraph_lines() >= min_paragraph_lines_for_spacing()) + { + times = paragraph_spacing() + 1; + } + + if(times > 1) { + os_ << string_type(size_type(times), '\n'); + curBlankLines_ += times - 1; + } else { + os_ << '\n'; + } + if(at_begin_of_line()) { + ++curBlankLines_; + } + curCol_ = 0; + curParagraphLines_ = 1; + } + + + //--------------------------------------------------------------- + bool at_begin_of_line() const noexcept { + return curCol_ <= current_line_begin(); + } + int current_line_begin() const noexcept { + return in_hanging_part_of_paragraph() + ? firstCol_ + hangingIndent_ + : firstCol_; + } + + int current_column() const noexcept { + return curCol_; + } + + int total_non_blank_lines() const noexcept { + return totalNonBlankLines_; + } + int paragraph_lines() const noexcept { + return curParagraphLines_; + } + int blank_lines_before_paragraph() const noexcept { + return curBlankLines_; + } + + + //--------------------------------------------------------------- + template<class T> + friend formatting_ostream& + operator << (formatting_ostream& os, const T& x) { + os.write(x); + return os; + } + + void flush() { + os_.flush(); + } + + +private: + bool in_hanging_part_of_paragraph() const noexcept { + return hanging_indent() > 0 && paragraph_lines() > 1; + } + bool current_line_empty() const noexcept { + return curCol_ < 1; + } + bool left_of_text_area() const noexcept { + return curCol_ < current_line_begin(); + } + bool right_of_text_area() const noexcept { + return curCol_ > lastCol_; + } + int columns_left_in_line() const noexcept { + return lastCol_ - std::max(current_line_begin(), curCol_); + } + + void fix_indent() { + if(left_of_text_area()) { + const auto fst = current_line_begin(); + write_spaces(fst - curCol_); + curCol_ = fst; + } + } + + template<class Iter> + bool only_whitespace(Iter first, Iter last) const { + return last == std::find_if_not(first, last, + [](char_type c) { return std::isspace(c); }); + } + + /** @brief write any object */ + template<class T> + void write(const T& x) { + std::ostringstream ss; + ss << x; + write(std::move(ss).str()); + } + + /** @brief write a stringstream */ + void write(const std::ostringstream& s) { + write(s.str()); + } + + /** @brief write a string */ + void write(const string_type& s) { + write(s.begin(), s.end()); + } + + /** @brief partition output into lines */ + template<class Iter> + void write(Iter first, Iter last) + { + if(first == last) return; + if(*first == '\n') { + if(!ignore_newline_chars()) wrap_hard(); + ++first; + if(first == last) return; + } + auto i = std::find(first, last, '\n'); + if(i != last) { + if(ignore_newline_chars()) ++i; + if(i != last) { + write_line(first, i); + write(i, last); + } + } + else { + write_line(first, last); + } + } + + /** @brief handle line wrapping due to column constraints */ + template<class Iter> + void write_line(Iter first, Iter last) + { + if(first == last) return; + if(only_whitespace(first, last)) return; + + if(right_of_text_area()) wrap_soft(); + + if(at_begin_of_line()) { + //discard whitespace, it we start a new line + first = std::find_if(first, last, + [](char_type c) { return !std::isspace(c); }); + if(first == last) return; + } + + const auto n = int(std::distance(first,last)); + const auto m = columns_left_in_line(); + //if text to be printed is too long for one line -> wrap + if(n > m) { + //break before word, if break is mid-word + auto breakat = first + m; + while(breakat > first && !std::isspace(*breakat)) --breakat; + //could not find whitespace before word -> try after the word + if(!std::isspace(*breakat) && breakat == first) { + breakat = std::find_if(first+m, last, + [](char_type c) { return std::isspace(c); }); + } + if(breakat > first) { + if(curCol_ < 1) ++totalNonBlankLines_; + fix_indent(); + std::copy(first, breakat, std::ostream_iterator<char_type>(os_)); + curBlankLines_ = 0; + } + if(breakat < last) { + wrap_soft(); + write_line(breakat, last); + } + } + else { + if(curCol_ < 1) ++totalNonBlankLines_; + fix_indent(); + std::copy(first, last, std::ostream_iterator<char_type>(os_)); + curCol_ += n; + curBlankLines_ = 0; + } + } + + /** @brief write a single character */ + void write(char_type c) + { + if(c == '\n') { + if(!ignore_newline_chars()) wrap_hard(); + } + else { + if(at_begin_of_line()) ++totalNonBlankLines_; + fix_indent(); + os_ << c; + ++curCol_; + } + } + + OStream& os_; + int curCol_; + int firstCol_; + int lastCol_; + int hangingIndent_; + int paragraphSpacing_; + int paragraphSpacingThreshold_; + int curBlankLines_; + int curParagraphLines_; + int totalNonBlankLines_; + bool ignoreInputNls_; +}; + + +} + + + + +/*************************************************************************//** + * + * @brief generates usage lines + * + * @details lazily evaluated + * + *****************************************************************************/ +class usage_lines +{ +public: + using string = doc_string; + + usage_lines(const group& cli, string prefix = "", + const doc_formatting& fmt = doc_formatting{}) + : + cli_(cli), fmt_(fmt), prefix_(std::move(prefix)) + { + if(!prefix_.empty()) prefix_ += ' '; + } + + usage_lines(const group& cli, const doc_formatting& fmt): + usage_lines(cli, "", fmt) + {} + + usage_lines& ommit_outermost_group_surrounders(bool yes) { + ommitOutermostSurrounders_ = yes; + return *this; + } + bool ommit_outermost_group_surrounders() const { + return ommitOutermostSurrounders_; + } + + template<class OStream> + inline friend OStream& operator << (OStream& os, const usage_lines& p) { + p.write(os); + return os; + } + + string str() const { + std::ostringstream os; os << *this; return os.str(); + } + + +private: + using stream_t = detail::formatting_ostream<>; + const group& cli_; + doc_formatting fmt_; + string prefix_; + bool ommitOutermostSurrounders_ = false; + + + //----------------------------------------------------- + struct context { + group::depth_first_traverser pos; + std::stack<string> separators; + std::stack<string> postfixes; + int level = 0; + const group* outermost = nullptr; + bool linestart = false; + bool useOutermost = true; + int line = 0; + + bool is_singleton() const noexcept { + return linestart && pos.is_last_in_path(); + } + bool is_alternative() const noexcept { + return pos.parent().exclusive(); + } + }; + + + /***************************************************************//** + * + * @brief writes usage text for command line parameters + * + *******************************************************************/ + template<class OStream> + void write(OStream& os) const + { + detail::formatting_ostream<OStream> fos(os); + fos.first_column(fmt_.first_column()); + fos.last_column(fmt_.last_column()); + + auto hindent = int(prefix_.size()); + if(fos.first_column() + hindent >= int(0.4 * fos.text_width())) { + hindent = fmt_.indent_size(); + } + fos.hanging_indent(hindent); + + fos.paragraph_spacing(fmt_.paragraph_spacing()); + fos.min_paragraph_lines_for_spacing(2); + fos.ignore_newline_chars(fmt_.ignore_newline_chars()); + + context cur; + cur.pos = cli_.begin_dfs(); + cur.linestart = true; + cur.level = cur.pos.level(); + cur.outermost = &cli_; + + write(fos, cur, prefix_); + } + + + /***************************************************************//** + * + * @brief writes usage text for command line parameters + * + * @param prefix all that goes in front of current things to print + * + *******************************************************************/ + template<class OStream> + void write(OStream& os, context cur, string prefix) const + { + if(!cur.pos) return; + + std::ostringstream buf; + if(cur.linestart) buf << prefix; + const auto initPos = buf.tellp(); + + cur.level = cur.pos.level(); + + if(cur.useOutermost) { + //we cannot start outside of the outermost group + //so we have to treat it separately + start_group(buf, cur.pos.parent(), cur); + if(!cur.pos) { + os << buf.str(); + return; + } + } + else { + //don't visit siblings of starter node + cur.pos.skip_siblings(); + } + check_end_group(buf, cur); + + do { + if(buf.tellp() > initPos) cur.linestart = false; + if(!cur.linestart && !cur.pos.is_first_in_parent()) { + buf << cur.separators.top(); + } + if(cur.pos->is_group()) { + start_group(buf, cur.pos->as_group(), cur); + if(!cur.pos) { + os << buf.str(); + return; + } + } + else { + buf << param_label(cur.pos->as_param(), cur); + ++cur.pos; + } + check_end_group(buf, cur); + } while(cur.pos); + + os << buf.str(); + } + + + /***************************************************************//** + * + * @brief handles pattern group surrounders and separators + * and alternative splitting + * + *******************************************************************/ + void start_group(std::ostringstream& os, + const group& group, context& cur) const + { + //does cur.pos already point to a member or to group itself? + //needed for special treatment of outermost group + const bool alreadyInside = &(cur.pos.parent()) == &group; + + auto lbl = joined_label(group, cur); + if(!lbl.empty()) { + os << lbl; + cur.linestart = false; + //skip over entire group as its label has already been created + if(alreadyInside) { + cur.pos.next_after_siblings(); + } else { + cur.pos.next_sibling(); + } + } + else { + const bool splitAlternatives = group.exclusive() && + fmt_.split_alternatives() && + std::any_of(group.begin(), group.end(), + [this](const pattern& p) { + return int(p.param_count()) >= fmt_.alternatives_min_split_size(); + }); + + if(splitAlternatives) { + cur.postfixes.push(""); + cur.separators.push(""); + //recursively print alternative paths in decision-DAG + //enter group? + if(!alreadyInside) ++cur.pos; + cur.linestart = true; + cur.useOutermost = false; + auto pfx = os.str(); + os.str(""); + //print paths in DAG starting at each group member + for(std::size_t i = 0; i < group.size(); ++i) { + std::stringstream buf; + cur.outermost = cur.pos->is_group() ? &(cur.pos->as_group()) : nullptr; + write(buf, cur, pfx); + if(buf.tellp() > int(pfx.size())) { + os << buf.str(); + if(i < group.size()-1) { + if(cur.line > 0) { + os << string(fmt_.line_spacing(), '\n'); + } + ++cur.line; + os << '\n'; + } + } + cur.pos.next_sibling(); //do not descend into members + } + cur.pos.invalidate(); //signal end-of-path + return; + } + else { + //pre & postfixes, separators + auto surround = group_surrounders(group, cur); + os << surround.first; + cur.postfixes.push(std::move(surround.second)); + cur.separators.push(group_separator(group, fmt_)); + //descend into group? + if(!alreadyInside) ++cur.pos; + } + } + cur.level = cur.pos.level(); + } + + + /***************************************************************//** + * + *******************************************************************/ + void check_end_group(std::ostringstream& os, context& cur) const + { + for(; cur.level > cur.pos.level(); --cur.level) { + os << cur.postfixes.top(); + cur.postfixes.pop(); + cur.separators.pop(); + } + cur.level = cur.pos.level(); + } + + + /***************************************************************//** + * + * @brief makes usage label for one command line parameter + * + *******************************************************************/ + string param_label(const parameter& p, const context& cur) const + { + const auto& parent = cur.pos.parent(); + + const bool startsOptionalSequence = + parent.size() > 1 && p.blocking() && cur.pos.is_first_in_parent(); + + const bool outermost = + ommitOutermostSurrounders_ && cur.outermost == &parent; + + const bool showopt = !cur.is_alternative() && !p.required() + && !startsOptionalSequence && !outermost; + + const bool showrep = p.repeatable() && !outermost; + + string lbl; + + if(showrep) lbl += fmt_.repeat_prefix(); + if(showopt) lbl += fmt_.optional_prefix(); + + const auto& flags = p.flags(); + if(!flags.empty()) { + const int n = std::min(fmt_.max_flags_per_param_in_usage(), + int(flags.size())); + + const bool surrAlt = n > 1 && !showopt && !cur.is_singleton(); + + if(surrAlt) lbl += fmt_.alternative_flags_prefix(); + bool sep = false; + for(int i = 0; i < n; ++i) { + if(sep) { + if(cur.is_singleton()) + lbl += fmt_.alternative_group_separator(); + else + lbl += fmt_.flag_separator(); + } + lbl += flags[i]; + sep = true; + } + if(surrAlt) lbl += fmt_.alternative_flags_postfix(); + } + else { + if(!p.label().empty()) { + lbl += fmt_.label_prefix() + + p.label() + + fmt_.label_postfix(); + } else if(!fmt_.empty_label().empty()) { + lbl += fmt_.label_prefix() + + fmt_.empty_label() + + fmt_.label_postfix(); + } else { + return ""; + } + } + + if(showopt) lbl += fmt_.optional_postfix(); + if(showrep) lbl += fmt_.repeat_postfix(); + + return lbl; + } + + + /***************************************************************//** + * + * @brief prints flags in one group in a merged fashion + * + *******************************************************************/ + string joined_label(const group& g, const context& cur) const + { + if(!fmt_.merge_alternative_flags_with_common_prefix() && + !fmt_.merge_joinable_with_common_prefix()) return ""; + + const bool flagsonly = std::all_of(g.begin(), g.end(), + [](const pattern& p){ + return p.is_param() && !p.as_param().flags().empty(); + }); + + if(!flagsonly) return ""; + + const bool showOpt = g.all_optional() && + !(ommitOutermostSurrounders_ && cur.outermost == &g); + + auto pfx = g.common_flag_prefix(); + if(pfx.empty()) return ""; + + const auto n = pfx.size(); + if(g.exclusive() && + fmt_.merge_alternative_flags_with_common_prefix()) + { + string lbl; + if(showOpt) lbl += fmt_.optional_prefix(); + lbl += pfx + fmt_.alternatives_prefix(); + bool first = true; + for(const auto& p : g) { + if(p.is_param()) { + if(first) + first = false; + else + lbl += fmt_.alternative_param_separator(); + lbl += p.as_param().flags().front().substr(n); + } + } + lbl += fmt_.alternatives_postfix(); + if(showOpt) lbl += fmt_.optional_postfix(); + return lbl; + } + //no alternatives, but joinable flags + else if(g.joinable() && + fmt_.merge_joinable_with_common_prefix()) + { + const bool allSingleChar = std::all_of(g.begin(), g.end(), + [&](const pattern& p){ + return p.is_param() && + p.as_param().flags().front().substr(n).size() == 1; + }); + + if(allSingleChar) { + string lbl; + if(showOpt) lbl += fmt_.optional_prefix(); + lbl += pfx; + for(const auto& p : g) { + if(p.is_param()) + lbl += p.as_param().flags().front().substr(n); + } + if(showOpt) lbl += fmt_.optional_postfix(); + return lbl; + } + } + + return ""; + } + + + /***************************************************************//** + * + * @return symbols with which to surround a group + * + *******************************************************************/ + std::pair<string,string> + group_surrounders(const group& group, const context& cur) const + { + string prefix; + string postfix; + + const bool isOutermost = &group == cur.outermost; + if(isOutermost && ommitOutermostSurrounders_) + return {string{}, string{}}; + + if(group.exclusive()) { + if(group.all_optional()) { + prefix = fmt_.optional_prefix(); + postfix = fmt_.optional_postfix(); + if(group.all_flagless()) { + prefix += fmt_.label_prefix(); + postfix = fmt_.label_prefix() + postfix; + } + } else if(group.all_flagless()) { + prefix = fmt_.label_prefix(); + postfix = fmt_.label_postfix(); + } else if(!cur.is_singleton() || !isOutermost) { + prefix = fmt_.alternatives_prefix(); + postfix = fmt_.alternatives_postfix(); + } + } + else if(group.size() > 1 && + group.front().blocking() && !group.front().required()) + { + prefix = fmt_.optional_prefix(); + postfix = fmt_.optional_postfix(); + } + else if(group.size() > 1 && cur.is_alternative() && + &group != cur.outermost) + { + prefix = fmt_.group_prefix(); + postfix = fmt_.group_postfix(); + } + else if(!group.exclusive() && + group.joinable() && !cur.linestart) + { + prefix = fmt_.joinable_prefix(); + postfix = fmt_.joinable_postfix(); + } + + if(group.repeatable()) { + if(prefix.empty()) prefix = fmt_.group_prefix(); + prefix = fmt_.repeat_prefix() + prefix; + if(postfix.empty()) postfix = fmt_.group_postfix(); + postfix += fmt_.repeat_postfix(); + } + + return {std::move(prefix), std::move(postfix)}; + } + + + /***************************************************************//** + * + * @return symbol that separates members of a group + * + *******************************************************************/ + static string + group_separator(const group& group, const doc_formatting& fmt) + { + const bool only1ParamPerMember = std::all_of(group.begin(), group.end(), + [](const pattern& p) { return p.param_count() < 2; }); + + if(only1ParamPerMember) { + if(group.exclusive()) { + return fmt.alternative_param_separator(); + } else { + return fmt.param_separator(); + } + } + else { //there is at least one large group inside + if(group.exclusive()) { + return fmt.alternative_group_separator(); + } else { + return fmt.group_separator(); + } + } + } +}; + + + + +/*************************************************************************//** + * + * @brief generates parameter and group documentation from docstrings + * + * @details lazily evaluated + * + *****************************************************************************/ +class documentation +{ +public: + using string = doc_string; + using filter_function = std::function<bool(const parameter&)>; + + documentation(const group& cli, + const doc_formatting& fmt = doc_formatting{}, + filter_function filter = param_filter{}) + : + cli_(cli), fmt_{fmt}, usgFmt_{fmt}, filter_{std::move(filter)} + { + //necessary, because we re-use "usage_lines" to generate + //labels for documented groups + usgFmt_.max_flags_per_param_in_usage( + usgFmt_.max_flags_per_param_in_doc()); + } + + documentation(const group& cli, filter_function filter) : + documentation{cli, doc_formatting{}, std::move(filter)} + {} + + documentation(const group& cli, const param_filter& filter) : + documentation{cli, doc_formatting{}, + [filter](const parameter& p) { return filter(p); }} + {} + + template<class OStream> + inline friend OStream& operator << (OStream& os, const documentation& p) { + p.write(os); + return os; + } + + string str() const { + std::ostringstream os; + write(os); + return os.str(); + } + + +private: + using dfs_traverser = group::depth_first_traverser; + + const group& cli_; + doc_formatting fmt_; + doc_formatting usgFmt_; + filter_function filter_; + enum class paragraph { param, group }; + + + /***************************************************************//** + * + * @brief writes documentation to output stream + * + *******************************************************************/ + template<class OStream> + void write(OStream& os) const { + detail::formatting_ostream<OStream> fos(os); + fos.first_column(fmt_.first_column()); + fos.last_column(fmt_.last_column()); + fos.hanging_indent(0); + fos.paragraph_spacing(0); + fos.ignore_newline_chars(fmt_.ignore_newline_chars()); + print_doc(fos, cli_); + } + + + /***************************************************************//** + * + * @brief writes full documentation text for command line parameters + * + *******************************************************************/ + template<class OStream> + void print_doc(detail::formatting_ostream<OStream>& os, + const group& cli, int indentLvl = 0) const + { + if(cli.empty()) return; + + //if group itself doesn't have docstring + if(cli.doc().empty()) { + for(const auto& p : cli) { + print_doc(os, p, indentLvl); + } + } + else { //group itself does have docstring + bool anyDocInside = std::any_of(cli.begin(), cli.end(), + [](const pattern& p){ return !p.doc().empty(); }); + + if(anyDocInside) { //group docstring as title, then child entries + handle_spacing(os, paragraph::group, indentLvl); + os << cli.doc(); + for(const auto& p : cli) { + print_doc(os, p, indentLvl + 1); + } + } + else { //group label first then group docstring + auto lbl = usage_lines(cli, usgFmt_) + .ommit_outermost_group_surrounders(true).str(); + + str::trim(lbl); + handle_spacing(os, paragraph::param, indentLvl); + print_entry(os, lbl, cli.doc()); + } + } + } + + + /***************************************************************//** + * + * @brief writes documentation text for one group or parameter + * + *******************************************************************/ + template<class OStream> + void print_doc(detail::formatting_ostream<OStream>& os, + const pattern& ptrn, int indentLvl) const + { + if(ptrn.is_group()) { + print_doc(os, ptrn.as_group(), indentLvl); + } + else { + const auto& p = ptrn.as_param(); + if(!filter_(p)) return; + + handle_spacing(os, paragraph::param, indentLvl); + print_entry(os, param_label(p, fmt_), p.doc()); + } + } + + /***************************************************************//** + * + * @brief handles line and paragraph spacings + * + *******************************************************************/ + template<class OStream> + void handle_spacing(detail::formatting_ostream<OStream>& os, + paragraph p, int indentLvl) const + { + const auto oldIndent = os.first_column(); + const auto indent = fmt_.first_column() + indentLvl * fmt_.indent_size(); + + if(os.total_non_blank_lines() < 1) { + os.first_column(indent); + return; + } + + if(os.paragraph_lines() > 1 || indent < oldIndent) { + os.wrap_hard(fmt_.paragraph_spacing() + 1); + } else { + os.wrap_hard(); + } + + if(p == paragraph::group) { + if(os.blank_lines_before_paragraph() < fmt_.paragraph_spacing()) { + os.wrap_hard(fmt_.paragraph_spacing() - os.blank_lines_before_paragraph()); + } + } + else if(os.blank_lines_before_paragraph() < fmt_.line_spacing()) { + os.wrap_hard(fmt_.line_spacing() - os.blank_lines_before_paragraph()); + } + os.first_column(indent); + } + + /*********************************************************************//** + * + * @brief prints one entry = label + docstring + * + ************************************************************************/ + template<class OStream> + void print_entry(detail::formatting_ostream<OStream>& os, + const string& label, const string& docstr) const + { + if(label.empty()) return; + + os << label; + + if(!docstr.empty()) { + if(os.current_column() >= fmt_.doc_column()) os.wrap_soft(); + const auto oldcol = os.first_column(); + os.first_column(fmt_.doc_column()); + os << docstr; + os.first_column(oldcol); + } + } + + + /*********************************************************************//** + * + * @brief makes label for one parameter + * + ************************************************************************/ + static doc_string + param_label(const parameter& param, const doc_formatting& fmt) + { + doc_string lbl; + + if(param.repeatable()) lbl += fmt.repeat_prefix(); + + const auto& flags = param.flags(); + if(!flags.empty()) { + lbl += flags[0]; + const int n = std::min(fmt.max_flags_per_param_in_doc(), + int(flags.size())); + for(int i = 1; i < n; ++i) { + lbl += fmt.flag_separator() + flags[i]; + } + } + else if(!param.label().empty() || !fmt.empty_label().empty()) { + lbl += fmt.label_prefix(); + if(!param.label().empty()) { + lbl += param.label(); + } else { + lbl += fmt.empty_label(); + } + lbl += fmt.label_postfix(); + } + + if(param.repeatable()) lbl += fmt.repeat_postfix(); + + return lbl; + } + +}; + + + + +/*************************************************************************//** + * + * @brief stores strings for man page sections + * + *****************************************************************************/ +class man_page +{ +public: + //--------------------------------------------------------------- + using string = doc_string; + + //--------------------------------------------------------------- + /** @brief man page section */ + class section { + public: + using string = doc_string; + + section(string stitle, string scontent): + title_{std::move(stitle)}, content_{std::move(scontent)} + {} + + const string& title() const noexcept { return title_; } + const string& content() const noexcept { return content_; } + + private: + string title_; + string content_; + }; + +private: + using section_store = std::vector<section>; + +public: + //--------------------------------------------------------------- + using value_type = section; + using const_iterator = section_store::const_iterator; + using size_type = section_store::size_type; + + + //--------------------------------------------------------------- + man_page& + append_section(string title, string content) + { + sections_.emplace_back(std::move(title), std::move(content)); + return *this; + } + //----------------------------------------------------- + man_page& + prepend_section(string title, string content) + { + sections_.emplace(sections_.begin(), + std::move(title), std::move(content)); + return *this; + } + + + //--------------------------------------------------------------- + const section& operator [] (size_type index) const noexcept { + return sections_[index]; + } + + //--------------------------------------------------------------- + size_type size() const noexcept { return sections_.size(); } + + bool empty() const noexcept { return sections_.empty(); } + + + //--------------------------------------------------------------- + const_iterator begin() const noexcept { return sections_.begin(); } + const_iterator end() const noexcept { return sections_.end(); } + + + //--------------------------------------------------------------- + man_page& program_name(const string& n) { + progName_ = n; + return *this; + } + man_page& program_name(string&& n) { + progName_ = std::move(n); + return *this; + } + const string& program_name() const noexcept { + return progName_; + } + + + //--------------------------------------------------------------- + man_page& section_row_spacing(int rows) { + sectionSpc_ = rows > 0 ? rows : 0; + return *this; + } + int section_row_spacing() const noexcept { return sectionSpc_; } + + +private: + int sectionSpc_ = 1; + section_store sections_; + string progName_; +}; + + + +/*************************************************************************//** + * + * @brief generates man sections from command line parameters + * with sections "synopsis" and "options" + * + *****************************************************************************/ +inline man_page +make_man_page(const group& cli, + doc_string progname = "", + const doc_formatting& fmt = doc_formatting{}) +{ + man_page man; + man.append_section("SYNOPSIS", usage_lines(cli,progname,fmt).str()); + man.append_section("OPTIONS", documentation(cli,fmt).str()); + return man; +} + + + +/*************************************************************************//** + * + * @brief generates man page based on command line parameters + * + *****************************************************************************/ +template<class OStream> +OStream& +operator << (OStream& os, const man_page& man) +{ + bool first = true; + const auto secSpc = doc_string(man.section_row_spacing() + 1, '\n'); + for(const auto& section : man) { + if(!section.content().empty()) { + if(first) first = false; else os << secSpc; + if(!section.title().empty()) os << section.title() << '\n'; + os << section.content(); + } + } + os << '\n'; + return os; +} + + + + + +/*************************************************************************//** + * + * @brief printing methods for debugging command line interfaces + * + *****************************************************************************/ +namespace debug { + + +/*************************************************************************//** + * + * @brief prints first flag or value label of a parameter + * + *****************************************************************************/ +inline doc_string doc_label(const parameter& p) +{ + if(!p.flags().empty()) return p.flags().front(); + if(!p.label().empty()) return p.label(); + return doc_string{"<?>"}; +} + +inline doc_string doc_label(const group&) +{ + return "<group>"; +} + +inline doc_string doc_label(const pattern& p) +{ + return p.is_group() ? doc_label(p.as_group()) : doc_label(p.as_param()); +} + + +/*************************************************************************//** + * + * @brief prints parsing result + * + *****************************************************************************/ +template<class OStream> +void print(OStream& os, const parsing_result& result) +{ + for(const auto& m : result) { + os << "#" << m.index() << " " << m.arg() << " -> "; + auto p = m.param(); + if(p) { + os << doc_label(*p) << " \t"; + if(m.repeat() > 0) { + os << (m.bad_repeat() ? "[bad repeat " : "[repeat ") + << m.repeat() << "]"; + } + if(m.blocked()) os << " [blocked]"; + if(m.conflict()) os << " [conflict]"; + os << '\n'; + } + else { + os << " [unmapped]\n"; + } + } + + for(const auto& m : result.missing()) { + auto p = m.param(); + if(p) { + os << doc_label(*p) << " \t"; + os << " [missing after " << m.after_index() << "]\n"; + } + } +} + + +/*************************************************************************//** + * + * @brief prints parameter label and some properties + * + *****************************************************************************/ +template<class OStream> +void print(OStream& os, const parameter& p) +{ + if(p.greedy()) os << '!'; + if(p.blocking()) os << '~'; + if(!p.required()) os << '['; + os << doc_label(p); + if(p.repeatable()) os << "..."; + if(!p.required()) os << "]"; +} + + +//------------------------------------------------------------------- +template<class OStream> +void print(OStream& os, const group& g, int level = 0); + + +/*************************************************************************//** + * + * @brief prints group or parameter; uses indentation + * + *****************************************************************************/ +template<class OStream> +void print(OStream& os, const pattern& param, int level = 0) +{ + if(param.is_group()) { + print(os, param.as_group(), level); + } + else { + os << doc_string(4*level, ' '); + print(os, param.as_param()); + } +} + + +/*************************************************************************//** + * + * @brief prints group and its contents; uses indentation + * + *****************************************************************************/ +template<class OStream> +void print(OStream& os, const group& g, int level) +{ + auto indent = doc_string(4*level, ' '); + os << indent; + if(g.blocking()) os << '~'; + if(g.joinable()) os << 'J'; + os << (g.exclusive() ? "(|\n" : "(\n"); + for(const auto& p : g) { + print(os, p, level+1); + } + os << '\n' << indent << (g.exclusive() ? "|)" : ")"); + if(g.repeatable()) os << "..."; + os << '\n'; +} + + +} // namespace debug +} //namespace clipp + +#endif + diff --git a/tools/hscript-validate/validator.cc b/tools/hscript-validate/validator.cc index e9e1979..5ebb9d4 100644 --- a/tools/hscript-validate/validator.cc +++ b/tools/hscript-validate/validator.cc @@ -11,14 +11,23 @@ #include "hscript/script.hh" #include "util/output.hh" +#include "3rdparty/clipp.h" int main(int argc, char *argv[]) { const Horizon::Script *my_script; Horizon::ScriptOptions opts; + int result_code = EXIT_SUCCESS; + std::string installfile; - if(argc < 2) { - output_error("hscript-validate", "No installfile specified", "", true); - std::cerr << "Run `" << argv[0] << " --help` for usage information." << std::endl; + auto cli = ( + clipp::value("installfile", installfile), + clipp::option("-k", "--keep-going").doc("Continue parsing after errors")( + [&opts] { opts.set(Horizon::ScriptOptionFlags::KeepGoing); } + ) + ); + if(!clipp::parse(argc, argv, cli)) { + std::cout << "usage:" << std::endl; + std::cout << clipp::usage_lines(cli, "hscript-validate") << std::endl; return EXIT_FAILURE; } @@ -28,12 +37,19 @@ int main(int argc, char *argv[]) { opts.set(Horizon::ScriptOptionFlags::Pretty); - my_script = Horizon::Script::load(argv[1], opts); + my_script = Horizon::Script::load(installfile, opts); if(my_script == nullptr) { std::cout << "Could not load the specified script." << std::endl; return EXIT_FAILURE; } - delete my_script; - return EXIT_SUCCESS; + if(!my_script->validate()) { + output_error("installfile", "Script failed validation step. Stop.", "", true); + result_code = EXIT_FAILURE; + } else { + output_info("installfile", "Script passed validation.", "", true); + } + + delete my_script; + return result_code; } |