LANG.CAST.PC.FN2DATA : Conversion from Function Pointer

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LANG.CAST.PC.FN2DATA : Conversion from Function Pointer

Summary

A value of function pointer type is cast or coerced to a non-function-pointer type.

Properties

MisraC2025

MisraC2025:11.1

Conversions shall not be performed between a pointer to a function and any other type

MisraC2023

MisraC2023:11.1

Conversions shall not be performed between a pointer to a function and any other type

Misra2012

Misra2012:11.1

Conversions shall not be performed between a pointer to a function and any other type

AUTOSARC++14

AUTOSARC++14:M5-2-6

A cast shall not convert a pointer to a function to any other pointer type, including a pointer to function type.

AUTOSARC++14:M8-4-4

A function identifier shall either be used to call the function or it shall be preceded by &.

MisraC++2008

MisraC++2008:5-2-6

A cast shall not convert a pointer to a function to any other pointer type, including a pointer to function type.

MisraC++2008:5-2-7

An object with pointer type shall not be converted to an unrelated pointer type, either directly or indirectly.

MisraC++2008:8-4-4

A function identifier shall either be used to call the function or it shall be preceded by &.

MisraC++2023

MisraC++2023:8.2.4

Casts shall not be performed between a pointer to a function and any other type

CWE

CWE:704

Incorrect Type Conversion or Cast

TS17961

TS17961:5.1-ptrcomp

Accessing an object through a pointer to an incompatible type

TS17961:5.6-argcomp

Calling functions with incorrect arguments

JSF++

JSF++:182

Type casting from any type to or from pointers shall not be used.

JSF++:183

Every possible measure should be taken to avoid type casting.

JPL

JPL:30

Do not cast function pointers into other types.

Example

typedef int (*TakesIntRetsInt)(int) ;

int PC_FN2DATA(TakesIntRetsInt f){
    int x = (int) f; /* 'Conversion from Function Pointer' warning issued here */
    int y = f;       /* 'Conversion from Function Pointer' warning issued here
                      * ('Bad Initializer Type' warning also issued)
                      */
    return x + y;
}