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Suppress warning about missing noreturn attribute (#549)

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Suppress warning about missing noreturn attribute

Adding `[[noreturn]]` to `report_unknown_type` suppresses the Clang/GCC `-Wmissing-noreturn` warning:

Clang outputs:

    .../fmt/fmt/format.cc:294:74: warning:
          function 'report_unknown_type' could be declared with
          attribute 'noreturn' [-Wmissing-noreturn]
      ...code, const char *type) {
                                 ^

GCC outputs:

    .../fmt/fmt/format.cc:294:74: warning: function might be candidate for
        attribute 'noreturn' [-Wsuggest-attribute=noreturn]
      ...code, const char *type) {
                                 ^

Cherry-picked d16c4d.
This commit is contained in:
Victor Zverovich 2017-07-23 20:21:11 -07:00
parent eefdb379f9
commit da439f2838
1 changed files with 10 additions and 1 deletions
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11
fmt/format.h
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@ -137,6 +137,15 @@ typedef __int64 intmax_t;
# define FMT_HAS_CPP_ATTRIBUTE(x) 0 # define FMT_HAS_CPP_ATTRIBUTE(x) 0
#endif #endif
// Use the compiler's attribute noreturn.
#if defined(__MINGW32__) || defined(__MINGW64__)
# define FMT_NORETURN __attribute__((noreturn))
#elif FMT_HAS_CPP_ATTRIBUTE(noreturn)
# define FMT_NORETURN [[noreturn]]
#else
# define FMT_NORETURN
#endif
#ifndef FMT_USE_RVALUE_REFERENCES #ifndef FMT_USE_RVALUE_REFERENCES
// Don't use rvalue references when compiling with clang and an old libstdc++ // Don't use rvalue references when compiling with clang and an old libstdc++
// as the latter doesn't provide std::move. // as the latter doesn't provide std::move.
@ -855,7 +864,7 @@ struct int_traits {
std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type; std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type;
}; };
FMT_API void report_unknown_type(char code, const char *type); FMT_API FMT_NORETURN void report_unknown_type(char code, const char *type);
// Static data is placed in this class template to allow header-only // Static data is placed in this class template to allow header-only
// configuration. // configuration.