LANG.PREPROC.NOFPAREN : Macro Parameter Not Parenthesized

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LANG.PREPROC.NOFPAREN : Macro Parameter Not Parenthesized

Summary

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

Properties

MisraC2025

MisraC2025:20.7

Expressions resulting from the expansion of macro parameters shall be appropriately delimited

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

Example

#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 */

Relevant Configuration File Parameters

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