LANG.EXT.MS : Microsoft Extension

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A use of one of the following Microsoft extensions.

#pragma start_map_region ([ string-literal])

#pragma stop_map_region

#pragma comment(commenttype [, "str"])

__assume()

__has_assign()

__has_copy()

__has_nothrow_assign()

__uuidof()

try-except statement

try-finally statement

type declared with the __w64 specifier

struct type declared with the __interface keyword

Class Name

Microsoft Extension

Significance

style

Mnemonic

LANG.EXT.MS

Categories

MisraC2023	MisraC2023:1.2	Language extensions should not be used
Misra2012	Misra2012:1.2	Language extensions should not be used
Misra2004	Misra2004:1.1	All code shall conform to ISO/IEC 9899:1990 "Programming languages C", amended and corrected by ISO/IEC 9899/COR1:1995, ISO/IEC 9899/AMD1:1995, and ISO/IEC 9899/COR2:1996
	Misra2004:2.2	Source code shall only use /* ... */ style comments
JPL	JPL:1	Do not stray outside the language definition.

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="Microsoft Extension"

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

#pragma comment( lib, "user32" ) // Warning issued here because this not standard C

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

LANG.EXT.MS : Microsoft Extension

Summary

Properties

Example

Relevant Configuration File Parameters