gcc-4.9/gcc/testsuite/gcc.dg/c11-static-assert-5.c


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/* Test C11 static assertions.  Non-constant-expression without -pedantic.  */
/* { dg-do compile } */
/* { dg-options "-std=c11" } */

_Static_assert ((int)(1.0 + 1.0), "non-constant-expression");