Introduce LLVM_STATIC_ASSERT macro, which expands to C/C++'s static_assert on compile...

llvm-svn: 177699

diff --git a/llvm/include/llvm/Support/Compiler.h b/llvm/include/llvm/Support/Compiler.h
index 25f42a9..13d057b 100644 (file)
--- a/llvm/include/llvm/Support/Compiler.h
+++ b/llvm/include/llvm/Support/Compiler.h
@@ -351,4 +351,14 @@
 #define LLVM_EXPLICIT
 #endif
 
+/// \macro LLVM_STATIC_ASSERT
+/// \brief Expands to C/C++'s static_assert on compilers which support it.
+#if __has_feature(cxx_static_assert)
+# define LLVM_STATIC_ASSERT(expr, msg) static_assert(expr, msg)
+#elif __has_feature(c_static_assert)
+# define LLVM_STATIC_ASSERT(expr, msg) _Static_assert(expr, msg)
+#else
+# define LLVM_STATIC_ASSERT(expr, msg)
+#endif
+
 #endif