Case Rules

case_001

This rule checks the indent of case, when, and end case keywords.

Violation

 case data is

     when 0 =>
 when 1 =>
         when 3 =>

end case;

Fix

case data is

  when 0 =>
  when 1 =>
  when 3 =>

end case;

case_002

This rule checks for a single space after the case keyword.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

case    data is

Fix

case data is

case_003

This rule checks for a single space before the is keyword.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

case data    is

Fix

case data is

case_004

This rule checks for a single space after the when keyword.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

case data is

  when   3 =>

Fix

case data is

  when 3 =>

case_005

This rule checks for a single space before the => operator.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

case data is

  when 3   =>

Fix

case data is

  when 3 =>

case_006

This rule checks for a single space between the end and case keywords.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

case data is

end    case;

Fix

case data is

end case;

case_007

This rule checks for blank lines or comments above the case keyword.

Refer to Configuring Previous Line Rules for more information.

The default style is no_code.

Violation

a <= '1';
case data is


-- This is a comment
case data is

Fix

a <= '1';

case data is

-- This is a comment
case data is

case_008

The function of this rule has been included in rule case_201.

case_009

This rule checks for blank lines or comments above the end keyword.

Refer to Configuring Blank Lines for more information.

Violation

  when others =>
    null;
end case;

Fix

  when others =>
    null;

end case;

case_010

This rule checks for a blank line below the end case keywords.

Refer to Configuring Blank Lines for more information.

Violation

end case;
a <= '1';

Fix

end case;

a <= '1';

case_011

This rule checks the alignment of multiline when statements.

Violation

case data is

  when 0 | 1 | 2 | 3
   4 | 5 | 7 =>

Fix

case data is

  when 0 | 1 | 2 | 3
       4 | 5 | 7 =>

case_012

This rule checks for code after the => operator.

Violation

when 0 => a <= '1';

Fix

when 0 =>
  a <= '1';

case_013

This rule checks the indent of the null keyword.

Violation

  when others =>
     null;

  when others =>
null;

Fix

when others =>
  null;

when others =>
  null;

case_014

This rule checks the case keyword has proper case.

Refer to Configuring Uppercase and Lowercase Rules for more information.

Violation

CASE address is

Case address is

case address is

Fix

case address is

case address is

case address is

case_015

This rule checks the is keyword has proper case.

Refer to Configuring Uppercase and Lowercase Rules for more information.

Violation

case address IS

case address Is

case address iS

Fix

case address is

case address is

case address is

case_016

This rule checks the when has proper case.

Refer to Configuring Uppercase and Lowercase Rules for more information.

Violation

WHEN a =>
When b =>
when c =>

Fix

when a =>
when b =>
when c =>

case_017

This rule checks the end keyword in the end case has proper case.

Refer to Configuring Uppercase and Lowercase Rules for more information.

Violation

End case;
END case;
end case;

Fix

end case;
end case;
end case;

case_018

This rule checks the case keyword has proper case in the end case.

Refer to Configuring Uppercase and Lowercase Rules for more information.

Violation

end CASE;
end CAse;
end case;

Fix

end case;
end case;
end case;

case_019

This rule checks for labels before the case keyword. The label should be removed. The preference is to have comments above the case statement.

Violation

CASE_LABEL : case address is
CASE_LABEL: case address is
case address is

Fix

case address is
case address is
case address is

case_020

This rule checks for labels after the end case keywords. The label should be removed. The preference is to have comments above the case statement.

Violation

end case CASE_LABEL;
end case;

Fix

end case;
end case;

case_021

The function of this rule has been superseded with comment indent updates and is handled by rule comment_010.

case_200

This rule checks for a blank line below the => keyword.

Refer to Configuring Blank Lines for more information.

Violation

when 0 =>
  a <= b;

Fix

when 0 =>

  a <= b;

case_201

This rule checks for blank lines or comments above the when keyword.

Refer to Configuring Previous Line Rules for more information.

The default style is allow_comment.

Violation

case data is
  when 3 =>
  -- Comment
  when 4 =>

Fix

case data is

  when 3 =>

  -- Comment
  when 4 =>