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# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack.compiler import UnsupportedCompilerFlag
from spack.package import *


class Taskflow(CMakePackage):
    """Taskflow helps you quickly write parallel tasks programs in
    modern C++."""

    homepage = "https://github.com/taskflow/taskflow"
    url      = "https://github.com/taskflow/taskflow/archive/v2.7.0.tar.gz"
    git      = "https://github.com/taskflow/taskflow.git"

    version('master', branch='master')
    version('2.7.0', sha256='bc2227dcabec86abeba1fee56bb357d9d3c0ef0184f7c2275d7008e8758dfc3e')

    # Compiler must offer C++14 support
    conflicts('%gcc@:4.8')
    conflicts('%clang@:3.5')
    conflicts('%apple-clang@:8.0.0')
    # untested: conflicts('%intel@:15')
    # untested: conflicts('%pgi@:14')

    def cmake_args(self):
        try:
            self.compiler.cxx14_flag
        except UnsupportedCompilerFlag:
            InstallError('Taskflow requires a C++14-compliant C++ compiler')

        args = []
        return args