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V2527. MISRA. A switch-expression should not have Boolean type. Consider using of 'if-else' construct.
This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).
A Boolean value can be cast to an integer and, therefore, can be used as a control variable in a 'switch' statement. However, it is preferable to use an 'if-else' construct in such cases as it conveys the developer's intentions in a clearer and more explicit way.
Original code:
int foo(unsigned a, unsigned b)
{
while (a != 0 && b != 0)
{
switch (a > b) // <=
{
case 0:
a -= b;
break;
default:
b -= a;
break;
}
}
return a;
}Better version:
int foo(unsigned a, unsigned b)
{
while (a != 0 && b != 0)
{
if (a > b)
{
b -= a;
}
else
{
a -= b;
}
}
return a;
}This diagnostic is classified as:
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