QA·C Help - 1317

	1317	Value of constant expression is not in the enum type to which it is being converted.

Enumerations		REFERENCE - ISO:C90-6.5.2.2 Enumeration Specifiers

It should rarely be necessary to convert to an enum type. However, in this particular case, the value of a constant expression is being converted (either implicitly or explicitly) to an enumerated type when the value is not a valid member of the enumeration. Although the C language allows this operation it is almost certainly a dangerous error and should be rectified.

Message 1317 is generated when the value of a constant expression is converted to an enum type and the value is not a member of the enumeration. However message 1461 will be generated instead if the value happens to be a value which can be generated from an inclusive bitwise inclusive OR (|) of some of the enumeration constants.

For example:


/*PRQA S 2017,2211,2213,3120,3198,3199,3203,3408,3447,3602 ++*/

enum ET { RED, AMBER, GREEN };

extern void func1(enum ET p);

extern enum ET foo(void)
{
    enum ET ena;

    ena = 10;                   /* Message 1317 and 1412 */

    ena = (enum ET)10;          /* Message 1317 and 1484 */

    func1(10);                  /* Message 1317 and 1411 */

    return 10;                  /* Message 1317 and 1413 */
}