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🚧 fix building with c++11

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Vladislav Nepogodin 2021-12-19 21:48:39 +04:00
parent f096c615c3
commit a087dee98a
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GPG Key ID: B62C3D10C54D5DA9
1 changed files with 18 additions and 13 deletions
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31
include/spdlog/common.h
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@ -321,24 +321,15 @@ struct file_event_handlers
namespace details { namespace details {
// to avoid useless casts (see https://github.com/nlohmann/json/issues/2893#issuecomment-889152324)
template<typename T, typename U, std::enable_if_t<!std::is_same<T, U>::value, int> = 0>
constexpr T conditional_static_cast(U value)
{
return static_cast<T>(value);
}
template<typename T, typename U, std::enable_if_t<std::is_same<T, U>::value, int> = 0>
constexpr T conditional_static_cast(U value)
{
return value;
}
// make_unique support for pre c++14 // make_unique support for pre c++14
#if __cplusplus >= 201402L // C++14 and beyond #if __cplusplus >= 201402L // C++14 and beyond
using std::enable_if_t;
using std::make_unique; using std::make_unique;
#else #else
template<bool B, class T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
template<typename T, typename... Args> template<typename T, typename... Args>
std::unique_ptr<T> make_unique(Args &&...args) std::unique_ptr<T> make_unique(Args &&...args)
{ {
@ -346,6 +337,20 @@ std::unique_ptr<T> make_unique(Args &&...args)
return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
} }
#endif #endif
// to avoid useless casts (see https://github.com/nlohmann/json/issues/2893#issuecomment-889152324)
template<typename T, typename U, enable_if_t<!std::is_same<T, U>::value, int> = 0>
constexpr T conditional_static_cast(U value)
{
return static_cast<T>(value);
}
template<typename T, typename U, enable_if_t<std::is_same<T, U>::value, int> = 0>
constexpr T conditional_static_cast(U value)
{
return value;
}
} // namespace details } // namespace details
} // namespace spdlog } // namespace spdlog