type_inspection.hpp

Go to the documentation of this file.

// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2022 deCODE Genetics
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/biocpp/biocpp-core/blob/main/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#if defined(__GNUC__) || defined(__clang__)
#    include <cxxabi.h>
#endif // defined(__GNUC__) || defined(__clang__)
 
#include <functional>
#include <memory>
#include <string>
#include <typeinfo>
 
#include <bio/core.hpp>
 
namespace bio::meta::detail
{
 
template <typename type>
inline std::string const type_name_as_string = []()
{
    std::string demangled_name{};
#if defined(__GNUC__) || defined(__clang__) // clang and gcc only return a mangled name.
    using safe_ptr_t = std::unique_ptr<char, std::function<void(char *)>>;
 
    int        status{};
    safe_ptr_t demangled_name_ptr{abi::__cxa_demangle(typeid(type).name(), 0, 0, &status),
                                  [](char * name_ptr) { free(name_ptr); }};
    demangled_name = std::string{std::addressof(*demangled_name_ptr)};
#else  // e.g. MSVC
    demangled_name = typeid(type).name();
#endif // defined(__GNUC__) || defined(__clang__)
 
    if constexpr (std::is_const_v<std::remove_reference_t<type>>)
        demangled_name += " const";
    if constexpr (std::is_lvalue_reference_v<type>)
        demangled_name += " &";
    if constexpr (std::is_rvalue_reference_v<type>)
        demangled_name += " &&";
 
    return demangled_name;
}();
 
} // namespace bio::meta::detail