diff options
Diffstat (limited to 'lib/spack/external/jinja2/runtime.py')
| -rw-r--r-- | lib/spack/external/jinja2/runtime.py | 54 |
1 files changed, 40 insertions, 14 deletions
diff --git a/lib/spack/external/jinja2/runtime.py b/lib/spack/external/jinja2/runtime.py index 00d5f03ca6..f9d7a6806c 100644 --- a/lib/spack/external/jinja2/runtime.py +++ b/lib/spack/external/jinja2/runtime.py @@ -15,7 +15,7 @@ from types import MethodType from jinja2.nodes import EvalContext, _context_function_types from jinja2.utils import Markup, soft_unicode, escape, missing, concat, \ - internalcode, object_type_repr, evalcontextfunction + internalcode, object_type_repr, evalcontextfunction, Namespace from jinja2.exceptions import UndefinedError, TemplateRuntimeError, \ TemplateNotFound from jinja2._compat import imap, text_type, iteritems, \ @@ -27,7 +27,7 @@ from jinja2._compat import imap, text_type, iteritems, \ __all__ = ['LoopContext', 'TemplateReference', 'Macro', 'Markup', 'TemplateRuntimeError', 'missing', 'concat', 'escape', 'markup_join', 'unicode_join', 'to_string', 'identity', - 'TemplateNotFound'] + 'TemplateNotFound', 'Namespace'] #: the name of the function that is used to convert something into #: a string. We can just use the text type here. @@ -36,6 +36,7 @@ to_string = text_type #: the identity function. Useful for certain things in the environment identity = lambda x: x +_first_iteration = object() _last_iteration = object() @@ -241,13 +242,14 @@ class Context(with_metaclass(ContextMeta)): __traceback_hide__ = True # noqa # Allow callable classes to take a context - fn = __obj.__call__ - for fn_type in ('contextfunction', - 'evalcontextfunction', - 'environmentfunction'): - if hasattr(fn, fn_type): - __obj = fn - break + if hasattr(__obj, '__call__'): + fn = __obj.__call__ + for fn_type in ('contextfunction', + 'evalcontextfunction', + 'environmentfunction'): + if hasattr(fn, fn_type): + __obj = fn + break if isinstance(__obj, _context_function_types): if getattr(__obj, 'contextfunction', 0): @@ -349,13 +351,17 @@ class BlockReference(object): class LoopContextBase(object): """A loop context for dynamic iteration.""" + _before = _first_iteration + _current = _first_iteration _after = _last_iteration _length = None - def __init__(self, recurse=None, depth0=0): + def __init__(self, undefined, recurse=None, depth0=0): + self._undefined = undefined self._recurse = recurse self.index0 = -1 self.depth0 = depth0 + self._last_checked_value = missing def cycle(self, *args): """Cycles among the arguments with the current loop index.""" @@ -363,6 +369,13 @@ class LoopContextBase(object): raise TypeError('no items for cycling given') return args[self.index0 % len(args)] + def changed(self, *value): + """Checks whether the value has changed since the last call.""" + if self._last_checked_value != value: + self._last_checked_value = value + return True + return False + first = property(lambda x: x.index0 == 0) last = property(lambda x: x._after is _last_iteration) index = property(lambda x: x.index0 + 1) @@ -370,6 +383,18 @@ class LoopContextBase(object): revindex0 = property(lambda x: x.length - x.index) depth = property(lambda x: x.depth0 + 1) + @property + def previtem(self): + if self._before is _first_iteration: + return self._undefined('there is no previous item') + return self._before + + @property + def nextitem(self): + if self._after is _last_iteration: + return self._undefined('there is no next item') + return self._after + def __len__(self): return self.length @@ -395,8 +420,8 @@ class LoopContextBase(object): class LoopContext(LoopContextBase): - def __init__(self, iterable, recurse=None, depth0=0): - LoopContextBase.__init__(self, recurse, depth0) + def __init__(self, iterable, undefined, recurse=None, depth0=0): + LoopContextBase.__init__(self, undefined, recurse, depth0) self._iterator = iter(iterable) # try to get the length of the iterable early. This must be done @@ -448,9 +473,10 @@ class LoopContextIterator(object): ctx.index0 += 1 if ctx._after is _last_iteration: raise StopIteration() - next_elem = ctx._after + ctx._before = ctx._current + ctx._current = ctx._after ctx._after = ctx._safe_next() - return next_elem, ctx + return ctx._current, ctx class Macro(object): |