LANG.STRUCT.DECL.GLOBAL : Inappropriate Declaration in Global Namespace

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CodeSonar^® 9.2p0

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CodeSecure Inc

C and C++

LANG.STRUCT.DECL.GLOBAL : Inappropriate Declaration in Global Namespace

Summary

A declaration in the global namespace is not one of the following.

main()
a namespace declaration
an extern "C" declaration
a type definition for one of the following type names: char_t, int8_t, uint16_t, uint32_t, int8_t, int32_t, int16_t, float32_t, float64_t

Properties

Class Name

Inappropriate Declaration in Global Namespace

Significance

style

Mnemonic

LANG.STRUCT.DECL.GLOBAL

Categories

AUTOSARC++14	AUTOSARC++14:M7-3-1	The global namespace shall only contain main, namespace declarations and extern "C" declarations.
MisraC++2008	MisraC++2008:7-3-1	The global namespace shall only contain main, namespace declarations and extern "C" declarations.
MisraC++2023	MisraC++2023:6.0.3	The only declarations in the global namespace shall be main, namespace declarations and extern "C" declarations

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="Inappropriate Declaration in Global Namespace"

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

extern "C" int extern_C_int;                                         // ok: extern "C" declaration

typedef int int32_t;                                                 // ok: type definitions for 'int32_t' are permitted

typedef int nonexempt_typename;   // 'Inappropriate Declaration in Global Namespace' warning issued here

int global_int;                   // 'Inappropriate Declaration in Global Namespace' warning issued here

void global_func(void){}           // 'Inappropriate Declaration in Global Namespace' warning issued here

namespace {
  int fn_in_anon_namespace(void);                                    // ok: not in the global namespace
}

namespace myns
{
  int var_in_named_namespace;                                        // ok: not in the global namespace
}

int32_t main ( ) { return 2; }                                       // ok: main()

Relevant Configuration File Parameters

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

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