From bd0b76329228986d1d461312989ec76c839d055b Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Mon, 6 Nov 2017 21:13:39 +0100
Subject: [PATCH] Refactor `DependsOn` with `DelegateClass`.

---
 Library/Homebrew/cask/lib/hbc/dsl/depends_on.rb | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/Library/Homebrew/cask/lib/hbc/dsl/depends_on.rb b/Library/Homebrew/cask/lib/hbc/dsl/depends_on.rb
index bdef4239a5..5faac299fa 100644
--- a/Library/Homebrew/cask/lib/hbc/dsl/depends_on.rb
+++ b/Library/Homebrew/cask/lib/hbc/dsl/depends_on.rb
@@ -2,7 +2,7 @@ require "rubygems"
 
 module Hbc
   class DSL
-    class DependsOn
+    class DependsOn < DelegateClass(Hash)
       VALID_KEYS = Set.new [
         :formula,
         :cask,
@@ -19,19 +19,18 @@ module Hbc
       }.freeze
 
       attr_accessor :java
-      attr_accessor :pairs
       attr_reader :arch, :cask, :formula, :macos, :x11
 
       def initialize
-        @pairs ||= {}
+        super({})
         @cask ||= []
         @formula ||= []
       end
 
-      def load(pairs = {})
+      def load(**pairs)
         pairs.each do |key, value|
           raise "invalid depends_on key: '#{key.inspect}'" unless VALID_KEYS.include?(key)
-          @pairs[key] = send(:"#{key}=", *value)
+          self[key] = send(:"#{key}=", *value)
         end
       end
 
@@ -90,14 +89,6 @@ module Hbc
         raise "invalid 'depends_on x11' value: #{arg.inspect}" unless [true, false].include?(arg)
         @x11 = arg
       end
-
-      def to_yaml
-        @pairs.to_yaml
-      end
-
-      def to_s
-        @pairs.inspect
-      end
     end
   end
 end