first steps to defining specialised slot classes

getting rid of the mess in SlotDefinition (wip)

test/slot_machine/instruction/test_argument_transfer.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestArgumentTransfer < SlotMachineInstructionTest
     def instruction
-      receiver = SlotDefinition.new(:message , [:receiver])
+      receiver = MessageDefinition.new( [:receiver])
       arg = SlotLoad.new("test", [:message, :caller] , [:message,:type] )
       ArgumentTransfer.new("" , receiver ,[arg])
     end

test/slot_machine/instruction/test_not_same_check.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestNotSameCheck < SlotMachineInstructionTest
     def instruction
-      target = SlotDefinition.new(:message , :caller)
+      target = SlotDefinition.for(:message , :caller)
       NotSameCheck.new(target , target , Label.new("ok" , "target"))
     end
     def test_len

test/slot_machine/instruction/test_slot_definition.rb

@@ -4,7 +4,7 @@ module SlotMachine
   class TestSlotDefinitionBasics < MiniTest::Test
 
     def slot(slot = :caller)
-      SlotDefinition.new(:message , slot)
+      MessageDefinition.new(slot)
     end
     def test_create_ok1
       assert_equal :message , slot.known_object

test/slot_machine/instruction/test_slot_definition1.rb

@@ -6,7 +6,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       @compiler = Risc::FakeCompiler.new
-      @definition = SlotDefinition.new(StringConstant.new("hi") , [])
+      @definition = SlotDefinition.for(StringConstant.new("hi") , [])
       @register = @definition.to_register(@compiler , InstructionMock.new)
       @instruction = @compiler.instructions.first
     end
@@ -27,7 +27,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       @compiler = Risc::FakeCompiler.new
-      @definition = SlotDefinition.new(StringConstant.new("hi") , [:type])
+      @definition = SlotDefinition.for(StringConstant.new("hi") , [:type])
       @register = @definition.to_register(@compiler , InstructionMock.new)
       @instruction = @compiler.instructions.first
     end

test/slot_machine/instruction/test_slot_definition2.rb

@@ -5,7 +5,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       @compiler = Risc::FakeCompiler.new
-      @definition = SlotDefinition.new(:message , :caller)
+      @definition = MessageDefinition.new( :caller)
       @register = @definition.to_register(@compiler , "fake source")
       @instruction = @compiler.instructions.first
     end

test/slot_machine/instruction/test_slot_definition3.rb

@@ -5,7 +5,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       @compiler = Risc::FakeCompiler.new
-      @definition = SlotDefinition.new(:message , [:caller , :type])
+      @definition = MessageDefinition.new( [:caller , :type])
       @register = @definition.to_register(@compiler , InstructionMock.new)
     end
     def test_def_next_class

test/slot_machine/instruction/test_truth_check.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestSameCheck < SlotMachineInstructionTest
     def instruction
-      target = SlotDefinition.new(:message , :caller)
+      target = MessageDefinition.new( :caller)
       TruthCheck.new(target , Label.new("ok" , "target"))
     end
     def test_len