[previous] 0481 [next] [C] Only scalar expressions may be cast to other types.
Constraint violations REFERENCE - ISO:C90-6.3.4 Cast Operators - Constraints

This is a constraint error

The operand of a cast cannot be a struct, a union, or an expression of "void" type or array type. Only expressions of scalar type can be cast to another type. For example: 


/*PRQA S 2213,3132,3198,3199,3203,3205,3408,3447,3625,3631 ++*/

struct ST { int ai[3]; };

extern struct ST sta;

void bar(void);

void foo(void)
{
    char *pc;

    pc = (char *)sta;          /* Message 0481               */
    pc = (char *)(bar());      /* Message 0481 and also 0543 */
}

MISRA-C:2004 Rules applicable to message 0481:

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

See also:

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