diff options
Diffstat (limited to 'Cython/Utility/CppSupport.cpp')
-rw-r--r-- | Cython/Utility/CppSupport.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/Cython/Utility/CppSupport.cpp b/Cython/Utility/CppSupport.cpp index b8fcff064..ba0002c94 100644 --- a/Cython/Utility/CppSupport.cpp +++ b/Cython/Utility/CppSupport.cpp @@ -56,3 +56,78 @@ auto __Pyx_pythran_to_python(T &&value) -> decltype(to_python( using returnable_type = typename pythonic::returnable<typename std::remove_cv<typename std::remove_reference<T>::type>::type>::type; return to_python(returnable_type{std::forward<T>(value)}); } + +#define __Pyx_PythranShapeAccessor(x) (pythonic::builtins::getattr(pythonic::types::attr::SHAPE{}, x)) + +////////////// MoveIfSupported.proto ////////////////// + +#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1600) + // move should be defined for these versions of MSVC, but __cplusplus isn't set usefully + #include <utility> + #define __PYX_STD_MOVE_IF_SUPPORTED(x) std::move(x) +#else + #define __PYX_STD_MOVE_IF_SUPPORTED(x) x +#endif + +////////////// EnumClassDecl.proto ////////////////// + +#if defined (_MSC_VER) + #if _MSC_VER >= 1910 + #define __PYX_ENUM_CLASS_DECL enum + #else + #define __PYX_ENUM_CLASS_DECL + #endif +#else + #define __PYX_ENUM_CLASS_DECL enum +#endif + +////////////// OptionalLocals.proto //////////////// +//@proto_block: utility_code_proto_before_types + +#include <utility> +#if defined(CYTHON_USE_BOOST_OPTIONAL) + // fallback mode - std::optional is preferred but this gives + // people with a less up-to-date compiler a chance + #include <boost/optional.hpp> + #define __Pyx_Optional_BaseType boost::optional +#else + #include <optional> + // since std::optional is a C++17 features, a templated using declaration should be safe + // (although it could be replaced with a define) + template <typename T> + using __Pyx_Optional_BaseType = std::optional<T>; +#endif + +// This class reuses as much of the implementation of std::optional as possible. +// The only place it differs significantly is the assignment operators, which use +// "emplace" (thus requiring move/copy constructors, but not move/copy +// assignment operators). This is preferred because it lets us work with assignable +// types (for example those with const members) +template <typename T> +class __Pyx_Optional_Type : private __Pyx_Optional_BaseType<T> { +public: + using __Pyx_Optional_BaseType<T>::__Pyx_Optional_BaseType; + using __Pyx_Optional_BaseType<T>::has_value; + using __Pyx_Optional_BaseType<T>::operator*; + using __Pyx_Optional_BaseType<T>::operator->; +#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1600) + __Pyx_Optional_Type& operator=(const __Pyx_Optional_Type& rhs) { + this->emplace(*rhs); + return *this; + } + __Pyx_Optional_Type& operator=(__Pyx_Optional_Type&& rhs) { + this->emplace(std::move(*rhs)); + return *this; + } + template <typename U=T> + __Pyx_Optional_Type& operator=(U&& rhs) { + this->emplace(std::forward<U>(rhs)); + return *this; + } +#else + // Note - the "cpp_locals" feature is designed to require C++14. + // This pre-c++11 fallback is largely untested, and definitely won't work + // in all the cases that the more modern version does + using __Pyx_Optional_BaseType<T>::operator=; // the chances are emplace can't work... +#endif +}; |