QA·C Help - 4642

	4642	The macro '%1s' could conflict in the future with the name of a function in '<%2s>'.

Identifiers		REFERENCE - ISO:C90-7.13 Future Library Directions, ISO:C99-7.26 Future Library Directions

This macro name is a reserved identifier. It could be introduced as a function in a future revision of the specified system library file.

Identifiers of this form are described in the ISO:C99 standard in Section 7.26 - Future Library Directions.

Names to avoid are:

Names beginning with is and a lowercase letter may be added to <ctype.h>.
Names beginning with to and a lowercase letter may be added to <ctype.h>.
Names beginning with str and a lowercase letter may be added to <stdlib.h>.
Names beginning with mem and a lowercase letter may be added to <string.h>.
Names beginning with wcs and a lowercase letter may be added to <string.h>.
The names cerf, cerff and cerfl may be added to <stdint.h>.
The names cexpm1, cexpm1f and cexpm1l may be added to <stdint.h>.
The names clog2, clog2f and clog2l may be added to <stdint.h>.
The names cerfc, cerfcf and cerfcl may be added to <stdint.h>.
The names clog10, clog10f and clog10l may be added to <stdint.h>.
The names clgamma, clgammaf and clgammal may be added to <stdint.h>.
The names cexp2, cexp2f and cexp2l may be added to <stdint.h>.
The names clog1p, clog1pf and clog1pl may be added to <stdint.h>.
The names ctgamma, ctgammaf and ctgammal may be added to <stdint.h>.

Although these names may not currently be used in the standard library, they might be in the future and it is therefore best to avoid them.

For example:


/*PRQA S 553,2017 ++*/

#define isabc             /* Message 4642 - A function of this name could be defined in a future revision of <ctype.h>    */
#define toabc             /* Message 4642 - A function of this name could be defined in a future revision of <ctype.h>    */
#define strabc            /* Message 4642 - A function of this name could be defined in a future revision of <stdlib.h>   */
#define memabc            /* Message 4642 - A function of this name could be defined in a future revision of <string.h>   */
#define wcsabc            /* Message 4642 - A function of this name could be defined in a future revision of <string.h>   */
#define cerf              /* Message 4642 - A function of this name could be defined in a future revision of <complex.h>  */
#define cexpm1f           /* Message 4642 - A function of this name could be defined in a future revision of <complex.h>  */