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expr_cast.c revision 1.1 
      1  1.1  rillig /*	$NetBSD: expr_cast.c,v 1.1 2021/08/03 18:03:54 rillig Exp $	*/
      2  1.1  rillig # 3 "expr_cast.c"
      3  1.1  rillig 
      4  1.1  rillig /*
      5  1.1  rillig  * Tests for value conversion using a cast-expression.
      6  1.1  rillig  *
      7  1.1  rillig  * K&R C does not mention any restrictions on the target type.
      8  1.1  rillig  * C90 requires both the source type and the target type to be scalar.
      9  1.1  rillig  */
     10  1.1  rillig 
     11  1.1  rillig struct S {
     12  1.1  rillig 	int member;
     13  1.1  rillig };
     14  1.1  rillig 
     15  1.1  rillig struct S
     16  1.1  rillig cast(void)
     17  1.1  rillig {
     18  1.1  rillig 	struct S {
     19  1.1  rillig 		double incompatible;
     20  1.1  rillig 	} local = {
     21  1.1  rillig 		0.0
     22  1.1  rillig 	};
     23  1.1  rillig 	/* expect-3: warning: 'local' set but not used in function 'cast' [191] */
     24  1.1  rillig 	/*
     25  1.1  rillig 	 * ^^ XXX: The variable _is_ used, but only in a semantically wrong
     26  1.1  rillig 	 * expression.  Lint should rather warn about the invalid cast in the
     27  1.1  rillig 	 * 'return' statement, but since all C compilers since C90 are
     28  1.1  rillig 	 * required to detect this already, there is no point in duplicating
     29  1.1  rillig 	 * that work.
     30  1.1  rillig 	 */
     31  1.1  rillig 
     32  1.1  rillig 	return (struct S)local;
     33  1.1  rillig }
     34