[previous] 0588 [next] [C] Width of bit-field must be an integral constant expression.
Constraint violations REFERENCE - ISO:C90-6.5.2.1 Structure and Union Specifiers - Constraints

This is a constraint error

The expression used to specify the width of this bit-field is not an integral constant expression.

For example: 


/*PRQA S 553,1269,3621 ++*/

#define MAX 3.2f
#define X_WIDTH (int)MAX
#define Y_WIDTH (int)(1.9f * MAX)

struct bits
{
   unsigned int bx:X_WIDTH;     /* OK           */
   unsigned int by:Y_WIDTH;     /* Message 0588 */
};

MISRA-C:2004 Rules applicable to message 0588:

Rule  1.1  (Required) All code shall conform to ISO/IEC 9899:1990 C programming language, ISO 9899, amended and corrected by ISO/IEC 9899/COR1:1995, ISO/IEC 9899/AMD1:1995, and ISO/IEC 9899/COR2: 1996192

QA·C Source Code Analyser 8.1
MISRA-C:2004 Compliance Module 3.2
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