LANG.STRUCT.DECL.ANH : Anonymous Namespace in Header File

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C and C++

LANG.STRUCT.DECL.ANH : Anonymous Namespace in Header File

Summary

An anonymous namespace is defined in a header file.

Properties

Class Name

Anonymous Namespace in Header File

Significance

style

Mnemonic

LANG.STRUCT.DECL.ANH

Categories

AUTOSARC++14	AUTOSARC++14:M7-3-3	There shall be no unnamed namespaces in header files.
MisraC++2008	MisraC++2008:7-3-3	There shall be no unnamed namespaces in header files.
MisraC++2023	MisraC++2023:10.3.1	There shall be no unnamed namespaces in header files
CERT-CPP	CERT-CPP:DCL59-CPP	Do not define an unnamed namespace in a header file

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="Anonymous Namespace in Header File"

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

Example

// LANG.STRUCT.DECL.ANH.cpp

#include "LANG.STRUCT.DECL.ANH.hpp"

namespace                          // ok: not in a header file
{
  int z=1;
}

int f(void){ return z + MYNS::y;}

// LANG.STRUCT.DECL.hpp

namespace        // 'Anonymous Namespace in Header File' warning issued here 
{
  int x=2;
}

namespace MYNS                     // ok : not anonymous
{
  int y=x;
}

Relevant Configuration File Parameters

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

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