[previous] 4402 [next] An expression of 'essentially Boolean' type (%1s) is being converted to enum type, '%2s' on assignment.
Arithmetic type - Assignment

This message is issued whenever an expression of essentially Boolean type undergoes an assigning conversion to an enum type.

For example: 


/*PRQA S 1-9999 ++*/
/*PRQA S 4402 --*/

enum E {ONE, TWO};

void foo (enum E);

enum E f4402 (int a)
{
  enum E ena = (a != 0);    /* 4402 */

  foo (a < 0);              /* 4402 */

  ena = (a < 0);            /* 4402 */

  return (a == 0);          /* 4402 */
}

MISRA-C:2004 Rules applicable to message 4402:

Rule  10.1  (Required) The value of an expression of integer type shall not be implicitly converted to a different underlying type if: a) it is not a conversion to a wider integer type of the same signedness, or b) the expression is complex, or c) the expression is not constant and is a function argument, or d) the expression is not constant and is a return expression

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