Detect [[clang::fallthrough]] even __has_cpp_attribute is not supported

26c151c5 · viz · 326ade76 · 26c151c5
Commit 26c151c5 authored Feb 08, 2015 by viz
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format.h format.h +3 -1

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--- a/format.h
+++ b/format.h
@@ -61,6 +61,7 @@
 #endif

 #ifdef __clang__
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
 # pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
 #endif

@@ -119,7 +120,8 @@
 # define FMT_NOEXCEPT(expr)
 #endif

-#if FMT_HAS_CPP_ATTRIBUTE(clang::fallthrough)
+#if FMT_HAS_CPP_ATTRIBUTE(clang::fallthrough) || \
+  (FMT_CLANG_VERSION >= 600 && __cplusplus >= 201103)
 # define FMT_FALLTHROUGH [[clang::fallthrough]]
 #else
 # define FMT_FALLTHROUGH