STL/stl/inc/typeindex

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2.1 KiB
C++

// typeindex standard header
// Copyright (c) Microsoft Corporation.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#pragma once
#ifndef _TYPEINDEX_
#define _TYPEINDEX_
#include <yvals_core.h>
#if _STL_COMPILER_PREPROCESSOR
#include <typeinfo>
#if _HAS_CXX20
#include <compare>
#endif // _HAS_CXX20
#pragma pack(push, _CRT_PACKING)
#pragma warning(push, _STL_WARNING_LEVEL)
#pragma warning(disable : _STL_DISABLED_WARNINGS)
_STL_DISABLE_CLANG_WARNINGS
#pragma push_macro("new")
#undef new
_STD_BEGIN
class type_index { // wraps a typeinfo for indexing
public:
type_index(const type_info& _Tinfo) noexcept : _Tptr(&_Tinfo) {}
_NODISCARD size_t hash_code() const noexcept {
return _Tptr->hash_code();
}
_NODISCARD const char* name() const noexcept {
return _Tptr->name();
}
_NODISCARD bool operator==(const type_index& _Right) const noexcept {
return *_Tptr == *_Right._Tptr;
}
_NODISCARD bool operator!=(const type_index& _Right) const noexcept {
return !(*this == _Right);
}
_NODISCARD bool operator<(const type_index& _Right) const noexcept {
return _Tptr->before(*_Right._Tptr);
}
_NODISCARD bool operator>=(const type_index& _Right) const noexcept {
return !(*this < _Right);
}
_NODISCARD bool operator>(const type_index& _Right) const noexcept {
return _Right < *this;
}
_NODISCARD bool operator<=(const type_index& _Right) const noexcept {
return !(_Right < *this);
}
private:
const type_info* _Tptr;
};
// STRUCT TEMPLATE SPECIALIZATION hash
template <>
struct hash<type_index> {
_CXX17_DEPRECATE_ADAPTOR_TYPEDEFS typedef type_index _ARGUMENT_TYPE_NAME;
_CXX17_DEPRECATE_ADAPTOR_TYPEDEFS typedef size_t _RESULT_TYPE_NAME;
_NODISCARD size_t operator()(const type_index& _Keyval) const noexcept {
return _Keyval.hash_code();
}
};
_STD_END
#pragma pop_macro("new")
_STL_RESTORE_CLANG_WARNINGS
#pragma warning(pop)
#pragma pack(pop)
#endif // _STL_COMPILER_PREPROCESSOR
#endif // _TYPEINDEX_