LANG.PREPROC.NOFPAREN : Macro Parameter Not Parenthesized

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The body of a function-like macro contains one or more non-parenthesized occurrences of a macro parameter.

Class Name

Macro Parameter Not Parenthesized

Significance

style

Mnemonic

LANG.PREPROC.NOFPAREN

Categories

MisraC2023	MisraC2023:20.7	Expressions resulting from the expansion of macro parameters shall be enclosed in parentheses
Misra2012	Misra2012:20.7	Expressions resulting from the expansion of macro parameters shall be enclosed in parentheses
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:M16-0-6	In the definition of a function-like macro, each instance of a parameter shall be enclosed in parentheses, unless it is used as the operand of # or ##.
MisraC++2008	MisraC++2008:16-0-6	In the definition of a function-like macro, each instance of a parameter shall be enclosed in parentheses, unless it is used as the operand of # or ## .
MisraC++2023	MisraC++2023:19.3.4	Parentheses shall be used to ensure macro arguments are expanded appropriately

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 Parameter Not Parenthesized"

#define M1( a, b ) ( a + b )              /* 'Macro Parameter Not Parenthesized' warning issued here
                                           * - 2 instances: one each for the unparenthesized uses of a and b
                                           */

#define M2( a, b ) ( ( a ) + ( b ) )                /* all occurrences of a and b in the body are parenthesized */

#define M3( a, b ) ( ( a ) + ( b ) + a )  /* 'Macro Parameter Not Parenthesized' warning issued here */

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

LANG.PREPROC.NOFPAREN : Macro Parameter Not Parenthesized

Summary

Properties

Example

Relevant Configuration File Parameters