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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.PREPROC.HASH : Macro Uses # Operator

Summary

A macro definition uses the # ("stringification" or "stringizing") operator.

See also:

Properties

Class Name Macro Uses # Operator
Significance style
Mnemonic LANG.PREPROC.HASH
Categories
MisraC2025 MisraC2025:20.10 The # and ## preprocessor operators should not be used
MisraC2023 MisraC2023:20.10 The # and ## preprocessor operators should not be used
Misra2012 Misra2012:20.10 The # and ## preprocessor operators should not be used
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
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"

Example 

#define tostr(x) #x  /* 'Macro Uses # Operator' warning issued here */

Relevant Configuration File Parameters

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

 

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