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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for string conversion in string interpolation,
# which is redundant.
#
# @example
#
# # bad
#
# "result is #{something.to_s}"
#
# @example
#
# # good
#
# "result is #{something}"
class RedundantStringCoercion < Base
include Interpolation
extend AutoCorrector
MSG_DEFAULT = 'Redundant use of `Object#to_s` in interpolation.'
MSG_SELF = 'Use `self` instead of `Object#to_s` in ' \
'interpolation.'
def_node_matcher :to_s_without_args?, '(send _ :to_s)'
def on_interpolation(begin_node)
final_node = begin_node.children.last
return unless to_s_without_args?(final_node)
message = final_node.receiver ? MSG_DEFAULT : MSG_SELF
add_offense(final_node.loc.selector, message: message) do |corrector|
receiver = final_node.receiver
corrector.replace(
final_node,
if receiver
receiver.source
else
'self'
end
)
end
end
end
end
end
end
Version data entries
34 entries across 34 versions & 3 rubygems