LANG.STRUCT.CGEN : Use of C Generic

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A use of the _Generic keyword.

Class Name

Use of C Generic

Significance

style

Mnemonic

LANG.STRUCT.CGEN

Categories

MisraC2023	MisraC2023:1.4	Emergent language features shall not be used
Misra2012	Misra2012:1.4	Emergent language features shall not be used

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Use of C Generic"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

int lang_struct_cgen(){
    return _Generic( 42, int: 1, float: 2 ); /* 'Use of C Generic' warning issued here */
}

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

LANG.STRUCT.CGEN : Use of C Generic

Summary

Properties

Example

Relevant Configuration File Parameters