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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.STRUCT.DECL.IO : Inconsistent Object Declarations

Summary

An identifier has multiple declarations, and the declarations differ in one or more of the following.

Properties

Class Name Inconsistent Object Declarations
Significance reliability
Mnemonic LANG.STRUCT.DECL.IO
Categories
MisraC2025 MisraC2025:8.3 All declarations of an object or function shall use the same names and type qualifiers
MisraC2023 MisraC2023:8.3 All declarations of an object or function shall use the same names and type qualifiers
Misra2012 Misra2012:8.3 All declarations of an object or function shall use the same names and type qualifiers
Misra2004 Misra2004:8.3 For each function parameter the type given in the declaration and definition shall be identical, and the return types shall also be identical
  Misra2004:8.4 If objects or functions are declared more than once their types shall be compatible
  Misra2004:16.4 The identifiers used in the declaration and definition of a function shall be identical
AUTOSARC++14 AUTOSARC++14:M3-2-1 All declarations of an object or function shall have compatible types.
  AUTOSARC++14:M3-9-1 The types used for an object, a function return type, or a function parameter shall be token-for-token identical in all declarations and re-declarations.
MisraC++2008 MisraC++2008:3-2-1 All declarations of an object or function shall have compatible types.
  MisraC++2008:3-9-1 The types used for an object, a function return type, or a function parameter shall be token-for-token identical in all declarations and re-declarations.
MisraC++2023 MisraC++2023:6.2.2 All declarations of a variable or function shall have the same type
  MisraC++2023:6.9.1 The same type aliases shall be used in all declarations and re- declarations of the same entity
TS17961 TS17961:5.13-funcdecl Declaring the same function or object in incompatible ways
CERT-C CERT-C:DCL40-C Do not create incompatible declarations of the same function or object
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
INCREMENTAL_BUILD = No
WARNING_FILTER += allow class="Inconsistent Object Declarations"
Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Incrementality Note: This warning class is not available for incremental analyses, even if the class is explicitly enabled.

Example

Suppose the project contains files LANG.STRUCT.DECL.IO.a.c and LANG.STRUCT.DECL.IO.a.c. They do not need to be in the same compilation unit.

/* LANG.STRUCT.DECL.IO.a.c */
        
int i;

double d;               /* 'Inconsistent Declarations' warning issued here
                         * - different types for d */

/* LANG.STRUCT.DECL.IO.b.c */
        
const int i;            /* 'Inconsistent Object Declarations' warning issued here
                         * - different type modifiers for i */

int d;

Relevant Configuration File Parameters

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

 

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