MISRA.EXPR.COND.NOT_BOOLEAN

First operand of conditional expression is not a boolean expression.

MISRA-C++ Rule 5-0-14 (required): The first operand of a conditional-operator shall have type bool.

Rationale

If an expression with type other than bool is used as the first operand of a conditional-operator, then its result will be implicitly converted to bool. The first operand shall contain an explicit test (yielding a result of type bool) in order to clarify the intentions of the developer.

Example

int32_a = int16_b ? int32_c : int32_d;            // Non-compliant
int32_a = bool_b ? int32_c : int32_d;             // Compliant
int32_a = ( int16_b < 5 ) ? int32_c : int32_d;    // Compliant