LANG.ID.NU.TYPE : Non-unique Identifiers: Typedef

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CodeSonar^® 9.2p0

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C and C++

LANG.ID.NU.TYPE : Non-unique Identifiers: Typedef

Summary

A typedef statement specifies a type name that is identical to one or more other identifiers.

See Identifier Classes for related warning classes.

Properties

Class Name

Non-unique Identifiers: Typedef

Significance

style

Mnemonic

LANG.ID.NU.TYPE

Categories

MisraC2025	MisraC2025:5.6	A typedef name shall be a unique identifier
MisraC2023	MisraC2023:5.6	A typedef name shall be a unique identifier
Misra2012	Misra2012:5.6	A typedef name shall be a unique identifier
Misra2004	Misra2004:5.3	A typedef name shall be a unique identifier
MisraC++2008	MisraC++2008:2-10-3	A typedef name (including qualification, if any) shall be a unique identifier.
CWE	CWE:710	Improper Adherence to Coding Standards
CERT-C	CERT-C:DCL23-C	Guarantee that mutually visible identifiers are unique

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="Non-unique Identifiers: Typedef"

Example

Suppose fileA.c and fileB.c are both in the analyzed software (but not necessarily in the same compilation unit).

/* LANG.ID.NU.TYPE.a.c */

#define typedefA 1
extern int typedefB;
void typedefC(void);

/* LANG.ID.NU.TYPE.b.c */

typedef int typedefA; /* 'Non-unique Identifiers: Typedef' warning issued here */
typedef int typedefB; /* 'Non-unique Identifiers: Typedef' warning issued here */
typedef int typedefC; /* 'Non-unique Identifiers: Typedef' warning issued here */

Relevant Configuration File Parameters

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

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