Reworking if statement

Using 2 phase approach
Flattening tbd

lib/mom/check.rb

@@ -0,0 +1,9 @@
+module Mom
+
+  # A base class for conditions in MOM
+  # Just a marker, no real functionality for now
+
+  class Check < Instruction
+
+  end
+end

lib/mom/if_statement.rb

@@ -0,0 +1,14 @@
+module Mom
+  class IfStatement < Instruction
+    attr_reader :condition , :if_true , :if_false
+
+    attr_accessor :hoisted
+
+    def initialize( cond , if_true , if_false = nil)
+      @condition = cond
+      @if_true = if_true
+      @if_false = if_false
+    end
+  end
+
+end

lib/mom/instruction.rb

@@ -2,10 +2,17 @@ module Mom
 
   # Base class for MOM instructions
   class Instruction
+    attr :next_instruction
+
+    # flattening will change the structure from a tree to a linked list (and use
+    # next_instruction to do so)
+    def flatten
+      raise "not implemented"
+    end
   end
 
-  # basically a label
-  class Noop
+  # A label with a name
+  class Label
     attr_reader :name
     def initialize(name)
       @name = name
@@ -16,6 +23,7 @@ module Mom
 end
 
 require_relative "simple_call"
+require_relative "if_statement"
 require_relative "truth_check"
 require_relative "jump"
 require_relative "slot_load"

lib/mom/truth_check.rb

@@ -1,3 +1,5 @@
+require_relative "check"
+
 module Mom
 
   # The funny thing about the ruby truth is that is is anything but false or nil
@@ -5,17 +7,11 @@ module Mom
   # To implement the normal ruby logic, we check for false or nil and jump
   # to the false branch. true_block follows implicitly
   #
-  # The class only carries the blocks for analysis, and does
-  #  - NOT imply any order
-  # - will not "handle" the blocks in subsequent processing.
-  #
-  class TruthCheck < Instruction
-    attr_reader :condition , :true_block , :false_block , :merge_block
+  class TruthCheck < Check
+    attr_reader :condition
 
-    def initialize(condition , true_block , false_block , merge_block)
-      @condition , @true_block , @false_block , @merge_block = condition , true_block , false_block , merge_block
+    def initialize(condition)
+      @condition  = condition 
     end
   end
-
-
 end