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FMT_COMPILE_STRING_VISIBILITY_ATTRIBUTE -> FMT_GCC_VISIBILITY_HIDDEN, add comments

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Alexey Ochapov 2020-11-04 23:47:25 +03:00
parent f480d30ea6
commit f74736dd14
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1 changed files with 20 additions and 18 deletions
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38
include/fmt/format.h
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@ -69,6 +69,13 @@
# define FMT_NOINLINE
#endif
// Special definition specific to GCC only
#if FMT_GCC_VERSION
# define FMT_GCC_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
#else
# define FMT_GCC_VISIBILITY_HIDDEN
#endif
#if __cplusplus == 201103L || __cplusplus == 201402L
# if defined(__INTEL_COMPILER) || defined(__PGI)
# define FMT_FALLTHROUGH
@ -3198,24 +3205,19 @@ FMT_CONSTEXPR basic_string_view<Char> compile_string_to_view(
return {s.data(), s.size()};
}
#if FMT_GCC_VERSION
# define FMT_COMPILE_STRING_VISIBILITY_ATTRIBUTE \
__attribute__((visibility("hidden")))
#else
# define FMT_COMPILE_STRING_VISIBILITY_ATTRIBUTE
#endif
#define FMT_STRING_IMPL(s, base) \
[] { \
/* Use a macro-like name to avoid shadowing warnings. */ \
struct FMT_COMPILE_STRING_VISIBILITY_ATTRIBUTE FMT_COMPILE_STRING : base { \
using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
FMT_MAYBE_UNUSED FMT_CONSTEXPR \
operator fmt::basic_string_view<char_type>() const { \
return fmt::detail::compile_string_to_view<char_type>(s); \
} \
}; \
return FMT_COMPILE_STRING(); \
#define FMT_STRING_IMPL(s, base) \
[] { \
/* Use a hidden visibility as workaround for some GCC, see */ \
/* https://github.com/fmtlib/fmt/issues/1973 for details */ \
/* Use a macro-like name to avoid shadowing warnings. */ \
struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base { \
using char_type = fmt::remove_cvref_t<decltype(s[0])>; \
FMT_MAYBE_UNUSED FMT_CONSTEXPR \
operator fmt::basic_string_view<char_type>() const { \
return fmt::detail::compile_string_to_view<char_type>(s); \
} \
}; \
return FMT_COMPILE_STRING(); \
}()
/**