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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 < Base
extend AutoCorrector
MSG = 'Use `#%<type>s_type?` to check node type.'
RESTRICT_ON_SEND = %i[==].freeze
# @!method node_type_check(node)
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)
message = format(MSG, type: node_type)
add_offense(node, message: message) do |corrector|
range = node.loc.expression.with(begin_pos: receiver.loc.expression.end_pos + 1)
corrector.replace(range, "#{node_type}_type?")
end
end
end
end
end
end
end
Version data entries
74 entries across 68 versions & 8 rubygems