removing exceptions

lib/ast/basic_expressions.rb

@@ -62,4 +62,8 @@ module Ast
       value
     end
   end
+  class AssignmentExpression < Expression
+    def compile frame , method
+    end
+  end
 end

lib/ast/if_expression.rb

@@ -1,7 +1,8 @@
 module Ast
   class IfExpression < Expression
 #    attr_reader  :cond, :if_true, :if_false
-    def compile context
+    def compile frame , method
+      return nil
       f = context.function
       # to execute the logic as the if states it, the blocks are the other way around
       # so we can the jump over the else if true ,and the else joins unconditionally after the true_block

lib/ast/operator_expressions.rb

@@ -1,7 +1,10 @@
 module Ast
   class OperatorExpression < Expression
 #    attr_reader  :operator, :left, :right
-    def compile context
+    def compile frame , method
+      nil
+    end
+    def scratch
       into = context.function
       puts "compiling operator #{to_s}"
       r_val = right.compile(context)

lib/ast/return_expression.rb

@@ -1,7 +1,10 @@
 module Ast
   class ReturnExpression < Expression
 #    attr_reader  :expression
-    def compile context
+    def compile frame ,method
+      nil
+    end
+    def sc
       into = context.function
       puts "compiling return expression #{expression}, now return in return_regsiter"
       expression_value = expression.compile(context)

lib/ast/while_expression.rb

@@ -1,7 +1,10 @@
 module Ast
   class WhileExpression < Expression
 #    attr_reader  :condition, :body
-    def compile context
+    def compile frame , method
+      nil
+    end
+    def old
       into = context.function
       ret = into.new_block "while_end"
       while_block = into.new_block "while_start"

lib/virtual/instruction.rb

@@ -15,6 +15,9 @@ module Virtual
     def attributes
       [:next]
     end
+    def initialize nex = nil
+      @next = nex
+    end
   end
 
   # the first instruction we need is to stop. Off course in a real machine this would be a syscall, but that is just 

lib/virtual/method.rb

@@ -15,15 +15,15 @@ module Virtual
       Method.new(:main , [] , Virtual::SelfReference )
     end
     def attributes
-      [:name , :args , :receiver , :start , :return_type]
+      [:name , :args , :receiver , :return_type , :start]
     end
-    def initialize name , args , receiver = Virtual::SelfReference.new , return_type = Virtual::Reference 
+    def initialize name , args , receiver = Virtual::SelfReference.new , return_type = Virtual::Reference , start = MethodEnter.new
       @name = name.to_sym
       @args = args
       @locals = []
       @receiver = receiver
       @return_type = return_type
-      @start = MethodEnter.new
+      @start = start
       @current = @start
     end
     attr_reader :name , :args , :receiver , :start