extend type inference for dsl

and finally test it

test/risc/test_builder1.rb

@@ -0,0 +1,20 @@
+require_relative "../helper"
+
+module Risc
+  class TestCompilerBuilder < MiniTest::Test
+
+    def setup
+      Parfait.boot!
+      Risc.boot!
+      @init = Parfait.object_space.get_init
+      @compiler = Risc::MethodCompiler.new( @init )
+      @builder  = @compiler.compiler_builder(@init)
+    end
+    def test_inserts_built
+      r1 = RegisterValue.new(:r1 , :Space)
+      @builder.build{ space << r1 }
+      assert_equal Transfer , @compiler.risc_instructions.next.class
+    end
+
+  end
+end