QA·C Help - 2111

	2111	Default argument promotion : unsigned short promoted to signed int.

Arithmetic type - Integral promotion		REFERENCE - ISO:C90-6.3.2.2 Function Calls, 6.5.4.3 Function Declarators, 7.8.1 Variable argument list access macros

An expression of type unsigned short is being used as an argument in a function call and is being converted to type signed int according to the rules of default argument promotion.

Message 2111 will be generated if the function has not been declared or has been declared with an old style declaration. It will not be generated when default argument promotion results from a call to a function declared with a variable argument list.

A conversion of this nature will only occur if a short is smaller than an int. If it is not, message 2113 will be generated.

For example:


/*PRQA S 1302,1303,3200,3209,3227,3408,3447,3602 ++*/

extern void f1(int n, unsigned short p);        /*              - new style function declaration   */
extern void f3();                               /* Message 3001 - old style function declaration   */
extern void f4(int n, ...);                     /*              - new style with variable arg list */

extern void foo(unsigned short uc)
{
    f1(1, uc);                                  /*                                      */
    f2(1, uc);                                  /* Message 2111 + 3335 - no declaration */
    f3(1, uc);                                  /* Message 2111                         */
    f4(1, uc);                                  /*                                      */
}