QA·C Help - 4040

	4040	unsigned short value returned from long long %s().

Arithmetic type - Implicit conversions

An expression of type unsigned short is being implicitly converted to type signed long long. This is not dangerous unless the two types happen to be implemented in the same number of bits. Implicit type conversions from an unsigned type to a signed type are not recommended.

Implicit type conversions of this nature can occur in the context of:

initializations
assignment operations
the passing of a function argument
the return of a value from a function


/*PRQA S 2017,3197,3199,3203,3227,3408,3447,3602,3625 ++*/
/****************************
 * OPTIONS: -ex LONGLONG
 ****************************/

extern void ef(signed long long f);

extern signed long long foo(unsigned short n)
{
    signed long long f = n;     /* Message 3840 - Initialization */

    f = n;                      /* Message 3840 - Assignment */

    ef(n);                      /* Message 3840 - Function argument */

    return n;                   /* Message 4040 - Function return */
}

No MISRA C:2012 Rules applicable to message 4040