/* Test for constant expressions: VLA size constraints. */ /* Origin: Joseph Myers */ /* { dg-do compile } */ /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */ void f (int m) { /* An array size that is a constant expression, not just an integer constant expression, must be checked for being positive, but only an integer constant expression makes it not a VLA (which affects certain compatibility checks, in particular). */ int a1[0]; /* { dg-error "zero" } */ int a2[-1]; /* { dg-error "negative" } */ int a3[(int)(double)0.0]; /* { dg-error "zero" } */ int a4[(int)-1.0]; /* { dg-error "negative" } */ int a5[(int)+1.0]; int a6[(int)+2.0]; void *p = (m ? &a5 : &a6); int a7[(int)1.0]; int a8[(int)2.0]; void *q = (m ? &a7 : &a8); /* { dg-error "pointer type mismatch in conditional expression" } */ }