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Contents
# encoding: utf-8
module RuboCop
module Cop
module Style
# This cop checks for use of the lambda.(args) syntax.
#
# @example
#
# # bad
# lambda.(x, y)
#
# # good
# lambda.call(x, y)
class LambdaCall < Cop
include ConfigurableEnforcedStyle
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
def offense?(node)
# lambda.() does not have a selector
style == :call && node.loc.selector.nil? ||
style == :braces && node.loc.selector
end
def autocorrect(node)
@corrections << lambda do |corrector|
if style == :call
receiver_node, = *node
expr = node.loc.expression
receiver = receiver_node.loc.expression.source
replacement = expr.source.sub("#{receiver}.", "#{receiver}.call")
corrector.replace(expr, replacement)
else
corrector.remove(node.loc.selector)
end
end
end
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
end
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems