reflection-inlines.h

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/*
 * This file is part of the µOS++ project (https://micro-os-plus.github.io/).
 * Copyright (c) 2021-2026 Liviu Ionescu. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose is hereby granted, under the terms of the MIT license.
 *
 * If a copy of the license was not distributed with this file, it can be
 * obtained from https://opensource.org/licenses/mit.
 *
 * Major parts of the code are inspired from v1.1.8 of the Boost UT project,
 * released under the terms of the Boost Version 1.0 Software License,
 * which can be obtained from https://www.boost.org/LICENSE_1_0.txt.
 */
 
// ----------------------------------------------------------------------------

 
#ifndef MICRO_TEST_PLUS_REFLECTION_INLINES_H_
#define MICRO_TEST_PLUS_REFLECTION_INLINES_H_
 
// ----------------------------------------------------------------------------
 
#ifdef __cplusplus
 
// ----------------------------------------------------------------------------
 
#include <cstdint>
 
// ----------------------------------------------------------------------------
 
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Waggregate-return"
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
#endif
#endif
 
// ============================================================================
 
namespace micro_os_plus::micro_test_plus
{
  // --------------------------------------------------------------------------
 
  namespace reflection
  {
    // ------------------------------------------------------------------------
 
#if !defined(__cpp_lib_source_location)

    constexpr source_location
    source_location::current (const char* file, unsigned int line) noexcept
    {
      source_location sl{};
      sl.file_ = file;
      sl.line_ = line;
      return sl;
    }

    constexpr auto
    source_location::file_name (void) const noexcept
    {
      return file_;
    }

    constexpr auto
    source_location::line (void) const noexcept
    {
      return line_;
    }
 
#endif

    template <class T>
    constexpr auto
    type_name (void) -> std::string_view
    {
      const std::string_view sv = __PRETTY_FUNCTION__;
#if defined(__clang__)
      // Clang: "... [T = <typename>]"
      // rfind('[') locates the opening bracket of "[T = ...]".
      const auto start = sv.rfind ('[') + 5; // skip "[T = "
      const auto end = sv.rfind (']');
#elif defined(__GNUC__)
      // GCC: "... [with T = <typename>]" or, on some versions,
      //      "... [with T = <typename>; std::string_view = ...]"
      // Search for "T = " explicitly to avoid landing on a later '='.
      const auto t_eq = sv.find ("T = ");
      const auto start = t_eq + 4; // skip "T = "
      const auto semi = sv.find (';', start);
      const auto end
          = (semi != std::string_view::npos) ? semi : sv.rfind (']');
#else
// Note: MSVC uses __FUNCSIG__ instead of __PRETTY_FUNCTION__.
// MSVC is not a supported target for this framework.
#error "Unsupported compiler"
#endif
      return sv.substr (start, end - start);
    }
 
    // ------------------------------------------------------------------------
  } // namespace reflection
 
  // --------------------------------------------------------------------------
} // namespace micro_os_plus::micro_test_plus
 
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
 
// ----------------------------------------------------------------------------
 
#endif // __cplusplus
 
// ----------------------------------------------------------------------------
 
#endif // MICRO_TEST_PLUS_REFLECTION_INLINES_H_
 
// ----------------------------------------------------------------------------