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Try detecting clang::fallthrough using __has_cpp_attribute
and use it to silence one of the warnings in #96.
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14
format.h
14
format.h
@ -76,6 +76,12 @@
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# define FMT_HAS_BUILTIN(x) 0
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#endif
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#ifdef __has_cpp_attribute
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# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
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#else
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# define FMT_HAS_CPP_ATTRIBUTE(x) 0
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#endif
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#ifndef FMT_USE_VARIADIC_TEMPLATES
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// Variadic templates are available in GCC since version 4.4
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// (http://gcc.gnu.org/projects/cxx0x.html) and in Visual C++
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@ -109,6 +115,12 @@
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# define FMT_NOEXCEPT(expr)
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#endif
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#if FMT_HAS_CPP_ATTRIBUTE(clang::fallthrough)
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# define FMT_FALLTHROUGH [[clang::fallthrough]]
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#else
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# define FMT_FALLTHROUGH
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#endif
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// A macro to disallow the copy constructor and operator= functions
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// This should be used in the private: declarations for a class
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#define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
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@ -864,7 +876,7 @@ class ArgVisitor {
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switch (arg.type) {
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default:
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assert(false);
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// Fall through.
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FMT_FALLTHROUGH;
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case Arg::INT:
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return FMT_DISPATCH(visit_int(arg.int_value));
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case Arg::UINT:
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