MISRA C:2012 Rule 16.2

A switch label shall only be used when the most closely-enclosing compound statement is the body of a switch statement

Description

Rule Definition

A switch label shall only be used when the most closely-enclosing compound statement is the body of a switch statement

Rationale

The C Standard permits placing a switch label (for instance, case or default) before any statement contained in the body of a switch statement. This flexibility can lead to unstructured code. To prevent unstructured code, make sure a switch label appears only at the outermost level of the body of a switch statement.

Additional Message in Report

All messages in report file begin with "MISRA-C switch statements syntax normative restriction."

Initializers shall not be used in switch clauses.
The child statement of a switch shall be a compound statement.
All switch clauses shall appear at the same level.
A switch clause shall only contain switch labels and switch clauses, and no other code.
A switch statement shall only contain switch labels and switch clauses, and no other code.

Troubleshooting

If you expect a rule violation but do not see it, refer to Diagnose Why Coding Standard Violations Do Not Appear as Expected.

Check Information

Group: Switch Statements

Category: Required

AGC Category: Advisory