/* PR/11658 The error message was quite mysterious for gcc up to 3.4.x */ union a { int x; }; int bug_if(union a a) { if (a) return 1; else return 0; } /* { dg-error "union type" } */ int bug_while(union a a) { while (a); } /* { dg-error "union type" } */ int bug_do_while(union a a) { do ; while (a); } /* { dg-error "union type" } */ int bug_for(union a a) { for ( ; a; ) ; } /* { dg-error "union type" } */ int bug_or(union a a) { return (a || 1); } /* { dg-error "union type" } */ int bug_and(union a a) { return (a && 1); } /* { dg-error "union type" } */ int bug_cond(union a a) { return (a ? 1 : 0); } /* { dg-error "union type" } */ int bug_cond2(union a a) { return (a ? : 0); } /* { dg-error "union type" } */ int bug_bool(union a a) { return (_Bool) a; } /* { dg-error "union type" } */