BlackMATov/meta.hpp
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simple name_of impl for types (msvc)

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BlackMATov
2023-12-30 23:42:10 +07:00
parent 29fa7cccfc
commit 09baf9ddef
4 changed files with 140 additions and 0 deletions
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43
develop/singles/headers/meta.hpp/meta_all.hpp
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@@ -1016,6 +1016,49 @@ namespace std
};
}
namespace meta_hpp::detail
{
namespace impl
{
template < typename T >
struct name_of_wrapper_impl {};
template < typename T >
[[nodiscard]] constexpr std::string_view name_of_impl() noexcept {
#if META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_CLANG_COMPILER_ID
constexpr auto prefix = std::string_view{"[T = "};
constexpr auto suffix = std::string_view{"]"};
constexpr auto fnsign = std::string_view{__PRETTY_FUNCTION__};
#elif META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_GCC_COMPILER_ID
constexpr auto prefix = std::string_view{"with T = "};
constexpr auto suffix = std::string_view{"]"};
constexpr auto fnsign = std::string_view{__PRETTY_FUNCTION__};
#elif META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_MSVC_COMPILER_ID
constexpr auto prefix = std::string_view{"name_of_wrapper_impl<"};
constexpr auto suffix = std::string_view{">>(void)"};
constexpr auto fnsign = std::string_view{__FUNCSIG__};
#else
constexpr auto prefix = std::string_view{"<"};
constexpr auto suffix = std::string_view{">"};
constexpr auto fnsign = std::string_view{"<unknown>"};
#endif
constexpr auto b = fnsign.find(prefix) + prefix.size();
constexpr auto e = fnsign.rfind(suffix);
static_assert(b < e);
auto n = fnsign.substr(b, e - b);
n.remove_prefix(std::min(n.find_first_not_of(' '), n.size()));
n.remove_suffix(std::min(n.size() - n.find_last_not_of(' ') - 1, n.size()));
return n;
}
}
template < typename T >
[[nodiscard]] constexpr std::string_view name_of() noexcept {
return impl::name_of_impl<impl::name_of_wrapper_impl<T>>();
}
}
namespace meta_hpp::detail
{
class noncopyable {

44
develop/untests/meta_base/name_of_tests.cpp Normal file
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@@ -0,0 +1,44 @@
/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/meta.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#include <meta.hpp/meta_all.hpp>
#include <doctest/doctest.h>
namespace meta_tests_ns
{
struct A {
int member{42};
int add(int) {return 42;}
static int sub(int) { return 42;}
};
enum class E {};
}
TEST_CASE("meta/meta_base/name_of") {
namespace meta = meta_hpp;
using meta::detail::name_of;
#if META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_MSVC_COMPILER_ID
CHECK(name_of<meta_tests_ns::E>() == "enum meta_tests_ns::E");
CHECK(name_of<meta_tests_ns::A>() == "struct meta_tests_ns::A");
CHECK(name_of<meta_tests_ns::A[]>() == "struct meta_tests_ns::A [0]");
CHECK(name_of<meta_tests_ns::A*>() == "struct meta_tests_ns::A *");
CHECK(name_of<meta_tests_ns::A&>() == "struct meta_tests_ns::A &");
CHECK(name_of<const meta_tests_ns::A&>() == "struct meta_tests_ns::A const &");
CHECK(name_of<decltype(&meta_tests_ns::A::add)>() == "int (__cdecl meta_tests_ns::A::*)(int)");
CHECK(name_of<decltype(&meta_tests_ns::A::sub)>() == "int (__cdecl*)(int)");
CHECK(name_of<decltype(&meta_tests_ns::A::member)>() == "int meta_tests_ns::A::*");
CHECK(name_of<int>() == "int");
CHECK(name_of<float>() == "float");
CHECK(name_of<void>() == "void");
CHECK(name_of<const void>() == "void const");
#endif
}

1
headers/meta.hpp/meta_base.hpp
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@@ -18,6 +18,7 @@
#include "meta_base/insert_or_assign.hpp"
#include "meta_base/is_in_place_type.hpp"
#include "meta_base/memory_buffer.hpp"
#include "meta_base/name_of.hpp"
#include "meta_base/noncopyable.hpp"
#include "meta_base/nonesuch.hpp"
#include "meta_base/overloaded.hpp"

52
headers/meta.hpp/meta_base/name_of.hpp Normal file
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@@ -0,0 +1,52 @@
/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/meta.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2021-2023, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#pragma once
#include "base.hpp"
namespace meta_hpp::detail
{
namespace impl
{
template < typename T >
struct name_of_wrapper_impl {};
template < typename T >
[[nodiscard]] constexpr std::string_view name_of_impl() noexcept {
#if META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_CLANG_COMPILER_ID
constexpr auto prefix = std::string_view{"[T = "};
constexpr auto suffix = std::string_view{"]"};
constexpr auto fnsign = std::string_view{__PRETTY_FUNCTION__};
#elif META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_GCC_COMPILER_ID
constexpr auto prefix = std::string_view{"with T = "};
constexpr auto suffix = std::string_view{"]"};
constexpr auto fnsign = std::string_view{__PRETTY_FUNCTION__};
#elif META_HPP_DETAIL_COMPILER_ID == META_HPP_DETAIL_MSVC_COMPILER_ID
constexpr auto prefix = std::string_view{"name_of_wrapper_impl<"};
constexpr auto suffix = std::string_view{">>(void)"};
constexpr auto fnsign = std::string_view{__FUNCSIG__};
#else
constexpr auto prefix = std::string_view{"<"};
constexpr auto suffix = std::string_view{">"};
constexpr auto fnsign = std::string_view{"<unknown>"};
#endif
constexpr auto b = fnsign.find(prefix) + prefix.size();
constexpr auto e = fnsign.rfind(suffix);
static_assert(b < e);
auto n = fnsign.substr(b, e - b);
n.remove_prefix(std::min(n.find_first_not_of(' '), n.size()));
n.remove_suffix(std::min(n.size() - n.find_last_not_of(' ') - 1, n.size()));
return n;
}
}
template < typename T >
[[nodiscard]] constexpr std::string_view name_of() noexcept {
return impl::name_of_impl<impl::name_of_wrapper_impl<T>>();
}
}