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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for usage of the %W() syntax when %w() would do.
#
# @example
# # bad
# %W(cat dog pig)
# %W[door wall floor]
#
# # good
# %w/swim run bike/
# %w[shirt pants shoes]
# %W(apple #{fruit} grape)
class UnneededCapitalW < Cop
include PercentLiteral
MSG = 'Do not use `%W` unless interpolation is needed. ' \
'If not, use `%w`.'.freeze
def on_array(node)
process(node, '%W')
end
def autocorrect(node)
lambda do |corrector|
src = node.loc.begin.source
corrector.replace(node.loc.begin, src.tr('W', 'w'))
end
end
private
def on_percent_literal(node)
return if requires_interpolation?(node)
add_offense(node)
end
def requires_interpolation?(node)
node.child_nodes.any? do |string|
string.dstr_type? ||
double_quotes_required?(string.source)
end
end
end
end
end
end
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