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C and C++

LANG.STRUCT.INIT.ENUM : Inconsistent Enumerator Initialization

Summary

The elements in an enumeration have been initialized in a way that conflicts with the JPL rule 12 requirement that enumeration declarations initialize either:

Properties

Class Name Inconsistent Enumerator Initialization
Significance style
Mnemonic LANG.STRUCT.INIT.ENUM
Categories
MisraC2025 MisraC2025:8.12 Within an enumerator list, the value of an implicitly-specified enumeration constant shall be unique
MisraC2023 MisraC2023:8.12 Within an enumerator list, the value of an implicitly-specified enumeration constant shall be unique
Misra2012 Misra2012:8.12 Within an enumerator list, the value of an implicitly-specified enumeration constant shall be unique
Misra2004 Misra2004:9.3 In an enumerator list, the "=" construct shall not be used to explicitly initialise members other than the first, unless all items are explicitly initialised
AUTOSARC++14 AUTOSARC++14:A7-2-4 In an enumeration, either (1) none, (2) the first or (3) all enumerators shall be initialized.
MisraC++2008 MisraC++2008:8-5-3 In an enumerator list, the = construct shall not be used to explicitly initialize members other than the first, unless all items are explicitly initialized.
MisraC++2023 MisraC++2023:11.6.3 Within an enumerator list, the value of an implicitly-specified enumeration constant shall be unique
CWE CWE:665 Improper Initialization
  CWE:710 Improper Adherence to Coding Standards
CERT-C CERT-C:INT09-C Ensure enumeration constants map to unique values
JSF++ JSF++:145 In an enumerator list, the '=' construct shall not be used to explicitly initialize members other than the first, unless all items are explicitly initialized.
JPL JPL:12 Do not use selective value assignments to elements of an enum list.
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="Inconsistent Enumerator Initialization"
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 

enum no_second_init { /* 'Inconsistent Enumerator Initialization' warning issued here */
   NO_SECOND_INIT1 = 0,
   NO_SECOND_INIT2, 
   NO_SECOND_INIT3 = 2
};

Relevant Configuration File Parameters

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

 

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