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V2579. MISRA. Macro should not be defin…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V2579. MISRA. Macro should not be defined with the same name as a keyword.

Apr 19 2021

This diagnostic rule is based on the software development guidelines by MISRA (Motor Industry Software Reliability Association).

This rule is only relevant for C.

The analyzer detected a macro whose name overlaps a keyword.

Examples:

#define if while
#define int float
#define while(something) for (;(something);)

Changes in the meaning of keywords are confusing and can lead to incorrect code.

An exception is the redefinition of the 'inline' keyword if the C90 language standard is used.

Here is the example that is valid in C90, but will be considered an error in C99 and later standards:

#define inline

The diagnostic also ignores keyword overrides if they are identical in terms of semantics, or the macro is expanded into a keyword of the same name.

Example:

#define const const

This diagnostic is classified as:

  • MISRA-C-20.4
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