QA·C Help - 3607

	3607	Parameter '%s' declared with function type in a K&R style function definition.

Functions		REFERENCE - ISO:C90-6.5.4.3 Function Declarators (including Prototypes) - Semantics

A function parameter is being declared as a function in an old style function definition.

In an old (pre-ISO) compiler, this syntax might not even be supported. However, according to the ISO:C90 standard, a function parameter declared in this way will actually be interpreted as a "pointer to function". In any case, it would be much clearer to declare it explicitly as a "pointer to function".

For example:


/*PRQA S 1304,3002,3199,3203,3206,3227,3408,3672 ++*/

/**************************
* OLD-STYLE FUNCTIONS
**************************/
extern int foo1(fa)                  /* Message 3607 - fa is declared as a "function" */
int fa(int p);
{
    int (*fp)(int p);

    fp = fa;

    return 1;
}

extern int foo2(fb)                  /* No message - fb is declared as a "pointer to function" */
int (*fb)(int p);
{
    int (*fp)(int p);

    fp = fb;

    return 1;
}

/**************************
* NEW-STYLE FUNCTIONS
**************************/
extern int foo3(int fc(int p))       /* No message - fc is declared as a "function" */
{
    int (*fp)(int p);

    fp = fc;

    return 1;
}

extern int foo4(int (*fd)(int p))    /* No message - fd is declared as a "pointer to function" */
{
    int (*fp)(int p);

    fp = fd;

    return 1;
}

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