LANG.PREPROC.PASTE : Macro Uses ## Operator

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A macro definition uses the ## ("token paste") operator.

Categories

MisraC2023	MisraC2023:20.10	The # and ## preprocessor operators should not be used
	MisraC2023:20.12	A macro parameter used as an operand to the # or ## operators, which is itself subject to further macro replacement, shall only be used as an operand to these operators
Misra2012	Misra2012:20.10	The # and ## preprocessor operators should not be used
	Misra2012:20.12	A macro parameter used as an operand to the # or ## operators, which is itself subject to further macro replacement, shall only be used as an operand to these operators
Misra2004	Misra2004:19.13	The # and ## preprocessor operators should 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.
	AUTOSARC++14:M16-3-2	The # and ## operators should not be used.
MisraC++2008	MisraC++2008:16-3-2	The # and ## operators should not be used.
MisraC++2023	MisraC++2023:19.3.1	The # and ## preprocessor operators should not be used
CWE	CWE:710	Improper Adherence to Coding Standards
CERT-C	CERT-C:PRE05-C	Understand macro replacement when concatenating tokens or performing stringification
	CERT-C:PRE30-C	Do not create a universal character name through concatenation
POW10	POW10:8	Limit the use of the preprocessor to file inclusion and simple macros.
JPL	JPL:20	Make only very limited use of the C pre-processor.

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="Macro Uses ## Operator"

/* 'Macro Uses ## Operator' warning issued on following line */
#define funcname(nm) \
    ( nm ## _func )

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

LANG.PREPROC.PASTE : Macro Uses ## Operator

Summary

Properties

Example

Relevant Configuration File Parameters