boost/assert/source_location.hpp
#ifndef BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED
#define BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED
// http://www.boost.org/libs/assert
//
// Copyright 2019, 2021 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/current_function.hpp>
#include <boost/config.hpp>
#include <boost/config/workaround.hpp>
#include <boost/cstdint.hpp>
#include <iosfwd>
#include <string>
#include <cstdio>
#include <cstring>
#if defined(__cpp_lib_source_location) && __cpp_lib_source_location >= 201907L
# include <source_location>
#endif
namespace boost
{
struct source_location
{
private:
char const * file_;
char const * function_;
boost::uint_least32_t line_;
boost::uint_least32_t column_;
public:
BOOST_CONSTEXPR source_location() BOOST_NOEXCEPT: file_( "" ), function_( "" ), line_( 0 ), column_( 0 )
{
}
BOOST_CONSTEXPR source_location( char const * file, boost::uint_least32_t ln, char const * function, boost::uint_least32_t col = 0 ) BOOST_NOEXCEPT: file_( file ), function_( function ), line_( ln ), column_( col )
{
}
#if defined(__cpp_lib_source_location) && __cpp_lib_source_location >= 201907L
BOOST_CONSTEXPR source_location( std::source_location const& loc ) BOOST_NOEXCEPT: file_( loc.file_name() ), function_( loc.function_name() ), line_( loc.line() ), column_( loc.column() )
{
}
#endif
BOOST_CONSTEXPR char const * file_name() const BOOST_NOEXCEPT
{
return file_;
}
BOOST_CONSTEXPR char const * function_name() const BOOST_NOEXCEPT
{
return function_;
}
BOOST_CONSTEXPR boost::uint_least32_t line() const BOOST_NOEXCEPT
{
return line_;
}
BOOST_CONSTEXPR boost::uint_least32_t column() const BOOST_NOEXCEPT
{
return column_;
}
#if defined(BOOST_MSVC)
# pragma warning( push )
# pragma warning( disable: 4996 )
#endif
std::string to_string() const
{
unsigned long ln = line();
if( ln == 0 )
{
return "(unknown source location)";
}
std::string r = file_name();
char buffer[ 16 ];
std::sprintf( buffer, ":%lu", ln );
r += buffer;
unsigned long co = column();
if( co )
{
std::sprintf( buffer, ":%lu", co );
r += buffer;
}
char const* fn = function_name();
if( *fn != 0 )
{
r += " in function '";
r += fn;
r += '\'';
}
return r;
}
#if defined(BOOST_MSVC)
# pragma warning( pop )
#endif
};
template<class E, class T> std::basic_ostream<E, T> & operator<<( std::basic_ostream<E, T> & os, source_location const & loc )
{
os << loc.to_string();
return os;
}
} // namespace boost
#if defined(BOOST_DISABLE_CURRENT_LOCATION)
# define BOOST_CURRENT_LOCATION ::boost::source_location()
#elif defined(BOOST_MSVC) && BOOST_MSVC >= 1926
// std::source_location::current() is available in -std:c++20, but fails with consteval errors before 19.31, and doesn't produce
// the correct result under 19.31, so prefer the built-ins
# define BOOST_CURRENT_LOCATION ::boost::source_location(__builtin_FILE(), __builtin_LINE(), __builtin_FUNCTION(), __builtin_COLUMN())
#elif defined(__cpp_lib_source_location) && __cpp_lib_source_location >= 201907L
# define BOOST_CURRENT_LOCATION ::boost::source_location(::std::source_location::current())
#elif defined(BOOST_CLANG) && BOOST_CLANG_VERSION >= 90000
# define BOOST_CURRENT_LOCATION ::boost::source_location(__builtin_FILE(), __builtin_LINE(), __builtin_FUNCTION(), __builtin_COLUMN())
#elif defined(BOOST_GCC) && BOOST_GCC >= 70000
// The built-ins are available in 4.8+, but are not constant expressions until 7
# define BOOST_CURRENT_LOCATION ::boost::source_location(__builtin_FILE(), __builtin_LINE(), __builtin_FUNCTION())
#elif defined(BOOST_GCC) && BOOST_GCC >= 50000
// __PRETTY_FUNCTION__ is allowed outside functions under GCC, but 4.x suffers from codegen bugs
# define BOOST_CURRENT_LOCATION ::boost::source_location(__FILE__, __LINE__, __PRETTY_FUNCTION__)
#else
// __func__ macros aren't allowed outside functions, but BOOST_CURRENT_LOCATION is
# define BOOST_CURRENT_LOCATION ::boost::source_location(__FILE__, __LINE__, "")
#endif
#endif // #ifndef BOOST_ASSERT_SOURCE_LOCATION_HPP_INCLUDED