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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.STRUCT.NVNR : Non-void noreturn

Summary

A function or method has non-void return type, but is declared with one of the following.

Warnings of this class are issued at the function definition location. No warnings are issued for function declarations that have no corresponding definition.

Properties

Class Name Non-void noreturn
Significance reliability
Mnemonic LANG.STRUCT.NVNR
Categories
MisraC2025 MisraC2025:17.10 A function declared with a _Noreturn function specifier shall have void return type
MisraC2023 MisraC2023:17.10 A function declared with a _Noreturn function specifier shall have void return type
Misra2012 Misra2012:17.10 A function declared with a _Noreturn function specifier shall have void return type
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. 
WARNING_FILTER += allow class="Non-void noreturn"

Example 

#include <stdnoreturn.h>
#include <stdlib.h>
typedef void myvoid;

_Noreturn int bad_noretA(void);          /* warning is issued at the bad_noretA() definition */

_Noreturn int bad_noretA(void){ /* 'Non-void noreturn' warning issued here */
    abort();
}

noreturn int bad_noretB(void){ /* 'Non-void noreturn' warning issued here
                                * - macro noreturn is defined to _Noreturn in stdnoreturn.h
                                */
    abort();
}

_Noreturn int noret_declonly(void);      /* no warning issued: noret_declonly() is never defined */

_Noreturn myvoid good_noret(void){       /* ok: return type is a typedef of void */
    abort();
}

int normal_ret(void){                    /* ok: function returns normally */
    return 1;
}

Relevant Configuration File Parameters

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

 

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