class Unparser::Equalizer
Define equality, equivalence and inspection methods
Original code before vendoring and reduction from: github.com/dkubb/equalizer.
Public Class Methods
new(*keys)
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Initialize an Equalizer
with the given keys
Will use the keys with which it is initialized to define cmp?, hash, and inspect
@param [Array<Symbol>] keys
@return [undefined]
@api private
rubocop:disable Lint/MissingSuper
# File lib/unparser/equalizer.rb, line 20 def initialize(*keys) @keys = keys define_methods freeze end
Private Instance Methods
define_cmp_method()
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# File lib/unparser/equalizer.rb, line 39 def define_cmp_method keys = @keys define_method(:cmp?) do |comparator, other| keys.all? do |key| __send__(key).public_send(comparator, other.__send__(key)) end end private :cmp? end
define_hash_method()
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# File lib/unparser/equalizer.rb, line 49 def define_hash_method keys = @keys define_method(:hash) do keys.map(&public_method(:__send__)).push(self.class).hash end end
define_inspect_method()
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# File lib/unparser/equalizer.rb, line 56 def define_inspect_method keys = @keys define_method(:inspect) do klass = self.class name = klass.name || klass.inspect "#<#{name}#{keys.map { |key| " #{key}=#{__send__(key).inspect}" }.join}>" end end
define_methods()
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# File lib/unparser/equalizer.rb, line 33 def define_methods define_cmp_method define_hash_method define_inspect_method end
included(descendant)
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rubocop:enable Lint/MissingSuper
# File lib/unparser/equalizer.rb, line 29 def included(descendant) descendant.include(Methods) end