source_location.h

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#pragma once

#include "stx/config.h"

STX_BEGIN_NAMESPACE

// It's equivalent to GCC's implementation
struct [[nodiscard]] SourceLocation {
  static constexpr SourceLocation current(
#if STX_HAS_BUILTIN(FILE)
      const char* file = __builtin_FILE(),
#else
      const char* file = "unknown",
#endif

#if STX_HAS_BUILTIN(FUNCTION)
      const char* func = __builtin_FUNCTION(),
#else
      const char* func = "unknown",
#endif

#if STX_HAS_BUILTIN(LINE)
      uint_least32_t line = __builtin_LINE(),
#else
      uint_least32_t line = 0,
#endif

#if STX_HAS_BUILTIN(COLUMN)
      uint_least32_t column = __builtin_COLUMN()
#else
      uint_least32_t column = 0
#endif
          ) noexcept {
    SourceLocation loc{};
    loc.line_ = line;
    loc.column_ = column;
    loc.file_ = file;
    loc.func_ = func;
    return loc;
  }

  // implementation-defined
  constexpr SourceLocation() noexcept
      : line_(), column_(), file_("\0"), func_("\0") {}
  constexpr SourceLocation(SourceLocation const& other) noexcept = default;
  constexpr SourceLocation(SourceLocation && other) noexcept = default;
  constexpr SourceLocation& operator=(SourceLocation const& other) noexcept =
      default;
  constexpr SourceLocation& operator=(SourceLocation&& other) noexcept =
      default;
  ~SourceLocation() noexcept = default;

  constexpr uint_least32_t column() const noexcept { return column_; }

  constexpr uint_least32_t line() const noexcept { return line_; }

  constexpr const char* file_name() const noexcept { return file_; }

  constexpr const char* function_name() const noexcept { return func_; }

 private:
  uint_least32_t line_;
  uint_least32_t column_;
  const char* file_;
  const char* func_;
};

STX_END_NAMESPACE