class RuboCop::Cop::Style::LambdaCall

This cop checks for use of the lambda.(args) syntax.

@example

# bad
lambda.(x, y)

# good
lambda.call(x, y)

Public Instance Methods

on_send(node) click to toggle source
# File lib/rubocop/cop/style/lambda_call.rb, line 18
def on_send(node)
  _receiver, selector, = *node

  # we care only about `call` methods
  return unless selector == :call

  if offense?(node)
    add_offense(node, :expression) { opposite_style_detected }
  else
    correct_style_detected
  end
end

Private Instance Methods

autocorrect(node) click to toggle source
# File lib/rubocop/cop/style/lambda_call.rb, line 39
def autocorrect(node)
  lambda do |corrector|
    if style == :call
      receiver_node, = *node
      receiver = receiver_node.source
      replacement = node.source.sub("#{receiver}.", "#{receiver}.call")
      corrector.replace(node.source_range, replacement)
    else
      corrector.remove(node.loc.selector)
    end
  end
end
message(_node) click to toggle source
# File lib/rubocop/cop/style/lambda_call.rb, line 52
def message(_node)
  if style == :call
    'Prefer the use of `lambda.call(...)` over `lambda.(...)`.'
  else
    'Prefer the use of `lambda.(...)` over `lambda.call(...)`.'
  end
end
offense?(node) click to toggle source
# File lib/rubocop/cop/style/lambda_call.rb, line 33
def offense?(node)
  # lambda.() does not have a selector
  style == :call && node.loc.selector.nil? ||
    style == :braces && node.loc.selector
end