BADMACRO.NULL : Use of NULL

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CodeSonar^® 9.2p0

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BADMACRO.NULL : Use of NULL

Summary

Some standards forbid the use of NULL in C++ code, and recommend using the nullptr keyword instead.

Properties

AUTOSARC++14

AUTOSARC++14:A4-10-1

Only nullptr literal shall be used as the null-pointer-constant.

AUTOSARC++14:M4-10-1

NULL shall not be used as an integer value.

AUTOSARC++14:M15-1-2

NULL shall not be thrown explicitly.

MisraC++2008

MisraC++2008:4-10-1

NULL shall not be used as an integer value.

MisraC++2008:15-1-2

NULL shall not be thrown explicitly.

MisraC++2023

MisraC++2023:7.11.1

nullptr shall be the only form of the null-pointer-constant

CWE

CWE:1076

Insufficient Adherence to Expected Conventions

JSF++

JSF++:175

A pointer shall not be compared to NULL or be assigned NULL; use plain 0 instead.

Example

#include <stdio.h>

extern void panic(void);

void panic_if_null(char *pA, char *pB) {
    if (pA == NULL)    /* 'Use of NULL' warning issued here */
        panic();
    if (pB == nullptr)           /* ok: uses nullptr keyword */
        panic();
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.