LANG.PREPROC.UNDEFINFN : Macro Undefined in Function

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LANG.PREPROC.UNDEFINFN : Macro Undefined in Function Body

A macro is undefined (with #undef) inside the body of a function.

Class Name

Macro Undefined in Function Body

Significance

style

Mnemonic

LANG.PREPROC.UNDEFINFN

Categories

Misra2004	Misra2004:19.5	Macros shall not be #define'd or #undef'd within a block
AUTOSARC++14	AUTOSARC++14:A16-0-1	The pre-processor shall only be used for unconditional and conditional file inclusion and include guards, and using the following directives: (1) #ifndef, (2) #ifdef, (3) #if, (4) #if defined, (5) #elif, (6) #else, (7) #define, (8) #endif, (9) #include.
CWE	CWE:710	Improper Adherence to Coding Standards
JPL	JPL:21	Do not define macros within a function or a block.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Macro Undefined in Function Body"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

#define CLEAR 1

int lang_preproc_undefinfn(void){
  /* 'Macro Undefined in Function Body' warning issued on following line */ 
#undef CLEAR
    return 0;
}

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

LANG.PREPROC.UNDEFINFN : Macro Undefined in Function Body

Summary

Properties

Example

Relevant Configuration File Parameters