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IAR Embedded Workbench for RX 5.20

MISRAC2004-12.6_a

In this section:
Synopsis

(Advisory) The operands of logical operators (&&, ||, and !) should be effectively boolean.

Enabled by default

No

Severity/Certainty

Low/Medium

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Full description

Operands of logical operators (&&, ||, and !) were found that are not effectively Boolean. This check is identical to MISRAC++2008-5-3-1.

Coding standards
MISRA C:2004 12.6

(Advisory) The operands of logical operators (&&, ||, and !) should be effectively boolean. Expressions that are effectively boolean should not be used as operands to operators other than (&&, ||, !, =, ==, !=, and ?:).

MISRA C++ 2008 5-3-1

(Required) Each operand of the ! operator, the logical && or the logical || operators shall have type bool.

Code examples

The following code example fails the check and will give a warning:

void example(void) {

	int d, c, b, a;

	d = ( c & a ) && b;

}

The following code example passes the check and will not give a warning about this issue:

typedef char	boolean_t;	/* Compliant: Boolean-by-enforcement */

void example(void)
{
    boolean_t d;
    boolean_t c = 1;
    boolean_t b = 0;
    boolean_t a = 1;

    d = ( c && a ) && b;

}