Created
June 26, 2022 21:51
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#include <boost/assert/source_location.hpp> | |
#include <algorithm> | |
#include <source_location> | |
#if not _MSC_VER | |
template<unsigned M, unsigned N> | |
#endif | |
struct sloc_literal { | |
#if _MSC_VER | |
char const* file = nullptr; | |
char const* function = nullptr; | |
#else | |
char file[M] = {}; | |
char function[N] = {}; | |
#endif | |
unsigned line; | |
unsigned column; | |
constexpr sloc_literal(std::source_location loc) { | |
#if _MSC_VER | |
file = loc.file_name(); | |
function = loc.function_name(); | |
#else | |
std::copy_n(loc.file_name(), M, file); | |
std::copy_n(loc.function_name(), N, function); | |
#endif | |
line = loc.line(); | |
column = loc.column(); | |
} | |
}; | |
#if _MSC_VER | |
template<sloc_literal loc> | |
static boost::source_location sloc(loc.file, loc.line, loc.function, loc.column); | |
#define PCURRENT_LOCATION &::sloc< \ | |
std::source_location::current()> | |
#elif 0 | |
#define PCURRENT_LOCATION ([](auto l) { \ | |
static boost::source_location const loc = l; \ | |
return &loc; \ | |
}(std::source_location::current())) | |
#elif 1 and __GNUC__ | |
#define PCURRENT_LOCATION reinterpret_cast<boost::source_location const*>( \ | |
__builtin_source_location()) | |
#else | |
template<unsigned M, unsigned N, sloc_literal<M, N> loc> | |
static boost::source_location sloc(loc.file, loc.line, loc.function, loc.column); | |
#define PCURRENT_LOCATION &::sloc< \ | |
std::strlen(std::source_location::current().file_name()), \ | |
std::strlen(std::source_location::current().function_name()), \ | |
std::source_location::current()> | |
#endif | |
auto f() { return PCURRENT_LOCATION; } | |
#if 0 | |
#include <boost/system/error_code.hpp> | |
#include <iostream> | |
int main() { | |
auto const ec = boost::system::error_code( | |
make_error_code(boost::system::errc::io_error, | |
PCURRENT_LOCATION)); | |
std::cout << ec.what(); | |
} | |
#endif |
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