start a new ruby layer to do the to_vool conversion

the "normalization" is getting more and more complicated and is not tested
And it seems i really don't like working with the untyped ast

lib/ruby/if_statement.rb

@@ -0,0 +1,39 @@
+require_relative "normalizer"
+
+module Ruby
+  class IfStatement < Statement
+    include Normalizer
+
+    attr_reader :condition , :if_true , :if_false
+
+    def initialize( cond , if_true , if_false = nil)
+      @condition = cond
+      @if_true = if_true
+      @if_false = if_false
+    end
+
+    def normalize
+      cond , rest = *normalize_name(@condition)
+      fals = @if_false ? @if_false.normalize : nil
+      me = IfStatement.new(cond , @if_true.normalize, fals)
+      return me unless rest
+      rest << me
+      rest
+    end
+
+    def has_false?
+      @if_false != nil
+    end
+
+    def has_true?
+      @if_true != nil
+    end
+
+    def to_s(depth = 0)
+      parts = ["if (#{@condition})" , @body.to_s(depth + 1) ]
+      parts += ["else" ,  "@if_false.to_s(depth + 1)"] if(@false)
+      parts << "end"
+      at_depth(depth , *parts )
+    end
+  end
+end