Sha256: 8b462bfad4b0a0e3248490830a2c15d477ceb6a1454646ea215fa7403f5ba463
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Size: 1002 Bytes
Versions: 14
Compression:
Stored size: 1002 Bytes
Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for inheritance from Struct.new.
#
# @example
# # bad
# class Person < Struct.new(:first_name, :last_name)
# def age
# 42
# end
# end
#
# # good
# Person = Struct.new(:first_name, :last_name) do
# def age
# 42
# end
# end
class StructInheritance < Cop
MSG = "Don't extend an instance initialized by `Struct.new`. " \
'Use a block to customize the struct.'
def on_class(node)
return unless struct_constructor?(node.parent_class)
add_offense(node, location: node.parent_class.source_range)
end
def_node_matcher :struct_constructor?, <<-PATTERN
{(send (const nil? :Struct) :new ...)
(block (send (const nil? :Struct) :new ...) ...)}
PATTERN
end
end
end
end
Version data entries
14 entries across 14 versions & 2 rubygems