1 /* Test for constraints on constant expressions.  In C90 it is clear that
2    certain constructs are not permitted in unevaluated parts of an
3    expression (except in sizeof); in C99 it might fall within implementation
4    latitude; and if the operands are suitable, diagnostics should not be
5    issued.
6 */
7 /* Origin: Joseph Myers <jsm28@cam.ac.uk>; inspired by
8    http://deja.com/getdoc.xp?AN=524271595&fmt=text by Peter Seebach.
9 */
10 /* { dg-do compile } */
11 /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
12 
13 /* The comma operator is in a subexpression that is not evaluated, so OK
14    by C99.  In C90 a diagnostic is required since it is not in a sizeof.
15 */
16 int i = (1 ? 0 : (2, 3));
17