MISRA.LITERAL.NULL.PTR

Literal zero used as the null-pointer-constant.

MISRA-C++ Rule 4-10-2 (required): Literal zero (0) shall not be used as the null-pointer-constant

Rationale

In C++, the literal 0 is both an integer type and the null-pointer-constant. To meet developer expectations, NULL should be used as the null-pointer-constant, and 0 for the integer zero.

Example

#include <cstddef>

void f1 ( int32_t );
void f2 ( int32_t * );

void f3 ( )
{
   f1 ( 0 ); // Compliant
   f2 ( 0 ); // Non-compliant, 0 used as the null pointer constant
}