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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module InternalAffairs
# Checks that node types are checked using the predicate helpers.
#
# @example
#
# # bad
# node.type == :send
#
# # good
# node.send_type?
#
class NodeTypePredicate < Cop
MSG = 'Use `#%<type>s_type?` to check node type.'.freeze
def_node_matcher :node_type_check, <<-PATTERN
(send (send $_ :type) :== (sym $_))
PATTERN
def on_send(node)
node_type_check(node) do |_receiver, node_type|
return unless Parser::Meta::NODE_TYPES.include?(node_type)
add_offense(node, message: format(MSG, type: node_type))
end
end
def autocorrect(node)
receiver, node_type = node_type_check(node)
range = Parser::Source::Range.new(node.source_range.source_buffer,
receiver.loc.expression.end_pos + 1,
node.loc.expression.end_pos)
lambda do |corrector|
corrector.replace(range, "#{node_type}_type?")
end
end
end
end
end
end
Version data entries
6,791 entries across 6,785 versions & 25 rubygems