QA·C Help - 1461

	1461	Value of constant expression is not in the enum type to which it is being converted, but is bitwise OR of constants in the enum type.

Enumerations		REFERENCE - ISO:C90-6.5.2.2 Enumeration Specifiers

It should rarely be necessary to convert to an enum type. In this particular case, the value of a constant expression is being converted (either implicitly or explicitly) to an enumerated type. The value concerned is not a valid member of the enumeration but happens to be a value which can be generated from the bitwise inclusive OR (|) of some of the enumeration constants. Although the C language allows this operation it is almost certainly a dangerous error and should be rectified.

Message 1317 is generated in the more general case when the value of the constant expression is not a member of the enumeration.

For example:


/*PRQA S 1277,2006,2017,2211,2213,3120,3198,3199,3203,3227,3408,3447,3602 ++*/

enum ET
{
    RED   = 0x0001,
    AMBER = 0x0002,
    GREEN = 0x0004
};

extern void func1(enum ET p);

extern enum ET foo(int m)
{
    enum ET ena;

    ena = 0x0003;               /* Message 1461 and 1412 */
    ena = 10;                   /* Message 1317 and 1412 */

    ena = (enum ET)0x0003;      /* Message 1461 and 1484 */
    ena = (enum ET)10;          /* Message 1317 and 1484 */

    func1(0x0003);              /* Message 1461 and 1411 */
    func1(10);                  /* Message 1317 and 1411 */

    if (m > 0)
    {
        return 0x0003;          /* Message 1461 and 1413 */
    }
    else
    {
        return 10;              /* Message 1317 and 1413 */
    }
}