LANG.CAST.PC.DATA2FN : Conversion to Function Pointer

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LANG.CAST.PC.DATA2FN : Conversion to Function Pointer

Summary

A value of non-function-pointer type is cast or coerced to a 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:M8-4-4

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

MisraC++2008

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++2023:7.11.3

A conversion from function type to pointer-to-function type shall only occur in appropriate contexts

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.

Example

typedef int (*TakesIntRetsInt)(int) ;

int PC_DATA2FN( int x){
    TakesIntRetsInt f = (TakesIntRetsInt) x; /* 'Conversion to Function Pointer' warning issued here */
    TakesIntRetsInt g =  x;                  /* 'Conversion to Function Pointer' warning issued here
                                              * ('Bad Initializer Type' warning also issued)
                                              */
    return (f(5) + g(5));
}