class RuboCop::Cop::Lint::EmptyWhen

Checks for the presence of ‘when` branches without a body.

@example

# bad
case foo
when bar
  do_something
when baz
end

# good
case condition
when foo
  do_something
when bar
  nil
end

@example AllowComments: true (default)

# good
case condition
when foo
  do_something
when bar
  # noop
end

@example AllowComments: false

# bad
case condition
when foo
  do_something
when bar
  # do nothing
end

Constants

MSG

Public Instance Methods

on_case(node) click to toggle source
# File lib/rubocop/cop/lint/empty_when.rb, line 50
def on_case(node)
  node.when_branches.each do |when_node|
    next if when_node.body
    next if cop_config['AllowComments'] && contains_comments?(when_node)

    add_offense(when_node)
  end
end