MISRA.CAST.PTR_TO_INT

Cast converts pointer to integral type.

MISRA-C Rule 11.3 (advisory): A cast should not be performed between a pointer type and an integral type.

[Implementation 24]

The size of integer that is required when a pointer is converted to an integer is implementation defined. Casting between a pointer and an integer type should be avoided where possible, but may be unavoidable when addressing memory mapped registers or other hardware specific features.

MISRA-C++ Rule 5-2-9 (advisory): A cast should not convert a pointer type to an integral type.

[Implementation 5.2.10(4, 5)]

Rationale

The size of integer that is required when a pointer is converted to an integer is implementation-defined. Casting between a pointer and an integer type should be avoided where possible, but may be unavoidable when addressing memory mapped registers or other hardware specific features. Note that C++ does not permit a pointer to be converted to any floating type.

Example

struct S
{
   int32_t i;
   int32_t j;
};

void f ( S * s )
{
   int32_t p = reinterpret_cast< int32_t >( s );  // Non-compliant
}