diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/utils/stl_compatibility.h')
-rw-r--r-- | comm/third_party/botan/src/lib/utils/stl_compatibility.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/utils/stl_compatibility.h b/comm/third_party/botan/src/lib/utils/stl_compatibility.h new file mode 100644 index 0000000000..03bd5c8ac1 --- /dev/null +++ b/comm/third_party/botan/src/lib/utils/stl_compatibility.h @@ -0,0 +1,80 @@ +/* +* STL standards compatibility functions +* (C) 2017 Tomasz Frydrych +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_STL_COMPATIBILITY_H_ +#define BOTAN_STL_COMPATIBILITY_H_ + +#include <botan/types.h> +#include <memory> + +#if __cplusplus < 201402L +#include <cstddef> +#include <type_traits> +#include <utility> +#endif + +BOTAN_FUTURE_INTERNAL_HEADER(stl_compatability.h) + +namespace Botan +{ +/* +* std::make_unique functionality similar as we have in C++14. +* C++11 version based on proposal for C++14 implemenatation by Stephan T. Lavavej +* source: https://isocpp.org/files/papers/N3656.txt +*/ +#if __cplusplus >= 201402L +template <typename T, typename ... Args> +constexpr auto make_unique(Args&&... args) + { + return std::make_unique<T>(std::forward<Args>(args)...); + } + +template<class T> +constexpr auto make_unique(std::size_t size) + { + return std::make_unique<T>(size); + } + +#else +namespace stlCompatibilityDetails +{ +template<class T> struct _Unique_if + { + typedef std::unique_ptr<T> _Single_object; + }; + +template<class T> struct _Unique_if<T[]> + { + typedef std::unique_ptr<T[]> _Unknown_bound; + }; + +template<class T, size_t N> struct _Unique_if<T[N]> + { + typedef void _Known_bound; + }; +} // namespace stlCompatibilityDetails + +template<class T, class... Args> +typename stlCompatibilityDetails::_Unique_if<T>::_Single_object make_unique(Args&&... args) + { + return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); + } + +template<class T> +typename stlCompatibilityDetails::_Unique_if<T>::_Unknown_bound make_unique(size_t n) + { + typedef typename std::remove_extent<T>::type U; + return std::unique_ptr<T>(new U[n]()); + } + +template<class T, class... Args> +typename stlCompatibilityDetails::_Unique_if<T>::_Known_bound make_unique(Args&&...) = delete; + +#endif + +} // namespace Botan +#endif |