MISRA.FOR.LOOP_CONTROL.NOT_BOOLEAN

Loop control variable is not boolean.

MISRA-C++ Rule 6-5-6 (required): A loop-control-variable other than the loop-counter which is modified in statement shall have type bool.

Rationale

loop-control-variables are typically used to terminate a for loop early. The code is easier to understand if this is done with the use of Boolean values (flags).

Example

for ( x = 0; ( x < 10 ) && ( u8a != 3U ); ++x ) // Non-compliant
{
   uint8_a = fn ( );
}
for ( x = 0; ( x < 10 ) && flag; ++x ) // Compliant
{
   u8a = fn ( );
   flag = u8a != 3U;
}