Replace the ruby18_wrap.rb preload script with ruby_classic_wrap.rb

scripts/preload/ruby18_wrap.rb

@@ -1,17 +0,0 @@
-# ruby18_wrap.rb
-# Author: Splendide Imaginarius (2022)
-
-# Creative Commons CC0: To the extent possible under law, Splendide Imaginarius
-# has waived all copyright and related or neighboring rights to ruby18_wrap.rb.
-# https://creativecommons.org/publicdomain/zero/1.0/
-
-# This preload script provides functions that existed in RPG Maker's Ruby v1.8,
-# but were renamed in the current Ruby version used in mkxp-z, so that games
-# (or other preload scripts) that expect Ruby v1.8's function names can find
-# them.
-
-class Hash
-	def index(*args)
-		key(*args)
-	end
-end

scripts/preload/ruby_classic_wrap.rb

@@ -0,0 +1,43 @@
+# ruby_classic_wrap.rb
+
+# Creative Commons CC0: To the extent possible under law, the author(s) have
+# dedicated all copyright and related and neighboring rights to this script
+# to the public domain worldwide.
+# https://creativecommons.org/publicdomain/zero/1.0/
+
+# This preload script provides functions that existed in RPG Maker's versions of Ruby,
+# but were renamed or changed in the current Ruby version used in mkxp-z, so that games
+# (or other preload scripts) that expect the older Ruby behavior can function.
+
+class Hash
+	alias_method :index, :key unless method_defined?(:index)
+end
+
+class Object
+	TRUE = true unless const_defined?("TRUE")
+	FALSE = false unless const_defined?("FALSE")
+	NIL = nil unless const_defined?("NIL")
+	
+	alias_method :id, :object_id unless method_defined?(:id)
+	alias_method :type, :class unless method_defined?(:type)
+end
+
+class NilClass
+	def id
+		4 # Starting with Ruby2, 64-bit builds of ruby make this 8
+	end
+end
+
+class TrueClass
+	def id
+		2 # Starting with Ruby2, 64-bit builds of ruby make this 20
+	end
+end
+
+if defined?(BasicObject) && BasicObject.instance_method(:initialize).arity == 0
+	# In ruby 1.9.2, and only ruby 1.9.2, BasicObject.initialize accepted any number of arguments
+	class BasicObject
+		def initialize(*args)
+		end
+	end
+end