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Cleanup compile-time check

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This commit is contained in:
Victor Zverovich 2024-08-31 08:29:41 -07:00
parent 53316903e6
commit 8eda3c8e90
1 changed files with 14 additions and 15 deletions
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29
include/fmt/base.h
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@ -2941,24 +2941,17 @@ struct compile_string {};
template <typename S>
using is_compile_string = std::is_base_of<compile_string, S>;
// Reports a compile-time error if S is not a valid format string.
template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
FMT_ALWAYS_INLINE void check_format_string(const S&) {
#ifdef FMT_ENFORCE_COMPILE_STRING
static_assert(is_compile_string<S>::value,
"FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
"FMT_STRING.");
#endif
}
template <typename... Args, typename S,
FMT_ENABLE_IF(is_compile_string<S>::value)>
void check_format_string(S format_str) {
using char_t = typename S::char_type;
FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
// Reports a compile-time error if S is not a valid format string for T.
template <typename... T, typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
void check_format_string(S fmt) {
using char_type = typename S::char_type;
FMT_CONSTEXPR auto s = basic_string_view<char_type>(fmt);
using checker = format_string_checker<char_type, remove_cvref_t<T>...>;
FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
ignore_unused(error);
}
template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
FMT_ALWAYS_INLINE void check_format_string(S) {}
// Use vformat_args and avoid type_identity to keep symbols short.
template <typename Char = char> struct vformat_args {
@ -3045,6 +3038,12 @@ template <typename Char, typename... Args> class basic_format_string {
detail::parse_format_string<true>(str_, checker(s));
}
#else
# ifdef FMT_ENFORCE_COMPILE_STRING
static_assert(
detail::is_compile_string<S>::value,
"FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
"FMT_STRING.");
# endif
detail::check_format_string<Args...>(s);
#endif
}