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fix: avoid evaluating undefined macro as zero

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to suppress a warning
This commit is contained in:
ToruNiina 2023-10-11 01:24:41 +09:00
parent 22d22198ec
commit 9b7b8908e8
1 changed files with 6 additions and 6 deletions
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12
toml/exception.hpp
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@ -33,7 +33,12 @@ inline std::string str_error(int errnum)
{
return std::string(buf.data());
}
#elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && ! _GNU_SOURCE // XSI
#elif defined(_GNU_SOURCE)
constexpr std::size_t bufsize = 256;
std::array<char, bufsize> buf;
const char* result = strerror_r(errnum, buf.data(), bufsize);
return std::string(result);
#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
constexpr std::size_t bufsize = 256;
std::array<char, bufsize> buf;
const int result = strerror_r(errnum, buf.data(), bufsize);
@ -45,11 +50,6 @@ inline std::string str_error(int errnum)
{
return std::string(buf.data());
}
#elif defined(_GNU_SOURCE) // GNU extension
constexpr std::size_t bufsize = 256;
std::array<char, bufsize> buf;
const char* result = strerror_r(errnum, buf.data(), bufsize);
return std::string(result);
#else // fallback
return std::strerror(errnum);
#endif