LANG.PREPROC.IFNDEF : Use of #ifndef

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A use of the #ifndef preprocessor directive.

Many coding standards forbid the use of #ifndef because it makes code harder for human readers to understand.

Class Name

Use of #ifndef

Significance

style

Mnemonic

LANG.PREPROC.IFNDEF

Categories

CWE	CWE:710	Improper Adherence to Coding Standards
JSF++	JSF++:28	The #ifndef and #endif pre-processor directives will only be used as defined in AV Rule 27 to prevent multiple inclusions of the same header file.

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="Use of #ifndef"

#ifndef X_DEFINED /* 'Use of #ifndef' warning issued here */
int y;
#endif                   /* ('Use of #endif' warning issued here if enabled) */

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

LANG.PREPROC.IFNDEF : Use of #ifndef

Summary

Properties

Example

Relevant Configuration File Parameters