LANG.STRUCT.INIT.ENUM : Inconsistent Enumerator

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LANG.STRUCT.INIT.ENUM : Inconsistent Enumerator Initialization

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

all elements, or

no elements, or

only the first element.

Class Name

Inconsistent Enumerator Initialization

Significance

style

Mnemonic

LANG.STRUCT.INIT.ENUM

Categories

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.

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

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

LANG.STRUCT.INIT.ENUM : Inconsistent Enumerator Initialization

Summary

Properties

Example

Relevant Configuration File Parameters