lib/plumb/match_class.rb in plumb-0.0.3 vs lib/plumb/match_class.rb in plumb-0.0.4

@@ -1,20 +1,21 @@
 # frozen_string_literal: true
 
-require 'plumb/steppable'
+require 'plumb/composable'
 
 module Plumb
   class MatchClass
-    include Steppable
+    include Composable
 
-    attr_reader :matcher
+    attr_reader :children
 
     def initialize(matcher = Undefined, error: nil, label: nil)
       raise TypeError 'matcher must respond to #===' unless matcher.respond_to?(:===)
 
       @matcher = matcher
       @error = error.nil? ? build_error(matcher) : (error % matcher)
       @label = matcher.is_a?(Class) ? matcher.inspect : "Match(#{label || @matcher.inspect})"
+      @children = [matcher].freeze
       freeze
     end
 
     def call(result)
       @matcher === result.value ? result : result.invalid(errors: @error)