delegate invocation to callables via the context

lib/v8.rb

@@ -21,6 +21,7 @@ require 'v8/conversion/string'
 require 'v8/conversion'
 require 'v8/access/names'
 require 'v8/access/indices'
+require 'v8/access/invocation'
 require 'v8/access'
 require 'v8/context'
 require 'v8/object'

lib/v8/access.rb

@@ -1,4 +1,5 @@
 class V8::Access
   include Names
   include Indices
+  include Invocation
 end

lib/v8/access/invocation.rb

@@ -0,0 +1,47 @@
+class V8::Access
+  module Invocation
+    def methodcall(code, this, args)
+      code.methodcall this, args
+    end
+
+    module Aritize
+      def aritize(args)
+        arity < 0 ? args : Array.new(arity).to_enum(:each_with_index).map {|item, i| args[i]}
+      end
+    end
+
+    module Proc
+      include Aritize
+      def methodcall(this, args)
+        call *aritize([this].concat(args))
+      end
+      ::Proc.send :include, self
+    end
+
+    module Method
+      include Aritize
+      def methodcall(this, args)
+        context = V8::Context.current
+        access = context.access
+        if this.equal? self.receiver
+          call *aritize(args)
+        elsif this.class <= self.receiver.class
+          access.methodcall(unbind, this, args)
+        elsif this.equal? context.scope
+          call *aritize(args)
+        else
+          fail TypeError, "cannot invoke #{self} on #{this}"
+        end
+      end
+      ::Method.send :include, self
+    end
+
+    module UnboundMethod
+      def methodcall(this, args)
+        access = V8::Context.current.access
+        access.methodcall bind(this), this, args
+      end
+      ::UnboundMethod.send :include, self
+    end
+  end
+end

lib/v8/access/names.rb

@@ -9,7 +9,7 @@ class V8::Access
       methods = accessible_names(obj)
       if methods.include?(name)
         method = obj.method(name)
-        method.arity == 0 ? method.call : method
+        method.arity == 0 ? method.call : method.unbind
       elsif obj.respond_to?(:[]) && !special?(name)
         obj.send(:[], name, &dontintercept)
       else

lib/v8/conversion.rb

@@ -23,6 +23,9 @@ for type in [Class, Object, Array, Hash, String, Symbol, Time, Proc, Method] do
     include V8::Conversion.const_get(name)
   end
 end
+class UnboundMethod
+  include V8::Conversion::Method
+end
 
 for type in [:Object, :String, :Date] do
   V8::C::const_get(type).class_eval do

lib/v8/conversion/code.rb

@@ -22,14 +22,15 @@ class V8::Conversion
       def call(arguments)
         protect do
           context = V8::Context.current
-          length_of_given_args = arguments.Length()
+          access = context.access
-          args = ::Array.new(@code.arity < 0 ? length_of_given_args : @code.arity)
+          args = ::Array.new(arguments.Length())
           0.upto(args.length - 1) do |i|
-            if i < length_of_given_args
+            if i < args.length
               args[i] = context.to_ruby arguments[i]
             end
           end
-          context.to_v8 @code.call(*args)
+          this = context.to_ruby arguments.This()
+          context.to_v8 access.methodcall(@code, this, args)
         end
       end
     end