VERILOG023: “default” case item should include a colon

Summary

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Reliability	Security	Maintainability	Code attribute	Effort to fix	Tags
-	-	LOW	Consistency | Conventional	2min	synthesis, readability, vscode, linter, lowrisc, simulation

Description

Noncompliant code example

unique case (my_state)
  StInit:   $display("Shall we begin");
  StError:  $display("Oh boy this is Bad");
  default begin // Noncompliant: No ":"
    my_state = StInit;
    interrupt = 1;
  end
endcase

Compliant solution

unique case (my_state)
  StInit:   $display("Shall we begin");
  StError:  $display("Oh boy this is Bad");
  default: begin
    my_state = StInit;
    interrupt = 1;
  end
endcase

To improve readability, a default case item should include a colon.

Articles & blog posts

• lowRISC Verilog Coding Style Guide - Spacing - Case items

Parameters

No parameters.