LANG.PREPROC.UNDEF : Use of #undef

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Preprocessor directive #undef was used.

Class Name

Use of #undef

Significance

style

Mnemonic

LANG.PREPROC.UNDEF

Categories

MisraC2023	MisraC2023:20.5	#undef should not be used
Misra2012	Misra2012:20.5	#undef should not be used
Misra2004	Misra2004:19.6	#undef shall not be used
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.
MisraC++2008	MisraC++2008:16-0-3	#undef shall not be used.
MisraC++2023	MisraC++2023:19.0.4	#undef should only be used for macros defined previously in the same file
CWE	CWE:710	Improper Adherence to Coding Standards
JPL	JPL:22	Do not undefine or redefine macros.

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="Use of #undef"

/* 'Use of #undef' warning issued on following line */
#undef CLEAR(x)

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

LANG.PREPROC.UNDEF : Use of #undef

Summary

Properties

Example

Relevant Configuration File Parameters