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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop looks for uses of the *for* keyword, or *each* method. The
# preferred alternative is set in the EnforcedStyle configuration
# parameter. An *each* call with a block on a single line is always
# allowed, however.
class For < Cop
include ConfigurableEnforcedStyle
EACH_LENGTH = 'each'.length
def on_for(node)
if style == :each
add_offense(node, :keyword, 'Prefer `each` over `for`.') do
opposite_style_detected
end
else
correct_style_detected
end
end
def on_block(node)
return if block_length(node).zero?
method, _args, _body = *node
return unless method.send_type?
_receiver, method_name, *args = *method
return unless method_name == :each && args.empty?
if style == :for
incorrect_style_detected(method)
else
correct_style_detected
end
end
private
def incorrect_style_detected(method)
end_pos = method.source_range.end_pos
range = range_between(end_pos - EACH_LENGTH, end_pos)
add_offense(range, range, 'Prefer `for` over `each`.') do
opposite_style_detected
end
end
end
end
end
end
Version data entries
13 entries across 13 versions & 2 rubygems