QA·C Help - 1264

	1264	A suffixed floating constant is being converted to a different floating type on assignment.

Arithmetic type - Assignment

This message is issued whenever a suffixed floating constant undergoes an assigning conversion to a different floating type. Consider changing the suffix to match the assigned-to type.

Remember, an unsuffixed floating constant is always of type double. A constant of type float is suffixed with "F", and a constant of type long double is suffixed with "L".

For example:


/*PRQA S 1-9999 ++*/
/*PRQA S 1264, 1265 --*/

extern float       fta;
extern double      dba;
extern long double lda;

void foo (float a);

float f1264 (void)
{
  fta = 5.3F;
  fta = 5.3;                /* 1265 */
  fta = 5.3L;               /* 1264 */

  dba = 5.3F;               /* 1264 */
  dba = 5.3;
  dba = 5.3L;               /* 1264 */

  lda = 5.3F;               /* 1264 */
  lda = 5.3;                /* 1265 */
  lda = 5.3L;
  
  foo (5.3L);               /* 1264 */
  
  return 5.3L;              /* 1264 */
}

MISRA-C:2004 Rules applicable to message 1264:

Rule 10.2 (Required)

The value of an expression of floating type shall not be implicitly converted to a different type if: a) it is not a conversion to a wider floating type, or b) the expression is complex, or c) the expression is a function argument, or d) the expression is a return expression