[previous] 1319 [next] Object of enum type is being modified with an increment or decrement operator.
C++ compatibility REFERENCE - ISO:C90-6.5.2.2 Enumeration Specifiers

An object of enum type is being modified using an increment or decrement operator.

An object of enum type should never be permitted to contain a value which is not one of its defined enumeration constants, but unfortunately the C language imposes no constraints of this nature. If an increment or decrement operator is applied to an enum object, there is a distinct risk that the value of the enum object will be modified to an inappropriate value (in fact, such operations are not permitted in C++).

For example: 


/*PRQA S 1481,2017,2211,2213,3227,3408,3447,3602 ++*/

enum ET { A = 2, B = 4, C = 6};

extern enum ET ex;

extern void foo(void)
{
    ++ex;                                /* Message 1319 */
    ex--;                                /* Message 1319 */
}

QA·C Source Code Analyser 8.1.2
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