adds variable, something compliles , but...

lib/arm/arm_machine.rb

@@ -32,7 +32,7 @@ module Arm
     end
     
     def word_load value , reg
-      raise "nnn " unless reg.class == Symbol
+      raise "not a register :#{reg}:" unless reg.class == Symbol
       mov( :left => reg , :right => value )
     end
     def string_load str_lit , reg

lib/ast/basic_expressions.rb

@@ -23,6 +23,11 @@ module Ast
     def initialize name
       @name = name
     end
+    def compile context
+      variable = Vm::Variable.new(@name)
+      context.locals[@name] = variable
+      variable
+    end
     def inspect
       self.class.name + ".new(" + name + ")"
     end

lib/ast/function_expression.rb

@@ -14,11 +14,15 @@ module Ast
     end
     
     def compile context
-      args = params.collect{|p| Vm::Value.type p.name }
-      function = Vm::Function.new(name ,args )
-      context.program.add_function function
       parent_locals = context.locals
       context.locals = {}
+      args = []
+      params.each do |param|
+        args << param.compile(context) # making the argument a local
+      end
+#      args = params.collect{|p| Vm::Value.type p.name }
+      function = Vm::Function.new(name ,args )
+      context.program.add_function function
       block.each do |b|
         compiled = b.compile context
         if compiled.is_a? Vm::Block

lib/ast/operator_expressions.rb

@@ -35,8 +35,10 @@ module Ast
     end
     
     def compile context
-      var = @assigned.compile(context)
-      context.locals[@assignee] = var 
+      value = @assigned.compile(context)
+      variable = Vm::Variable.new @assignee , :r0 , value
+      context.locals[@assignee] = variable
+      variable
     end
 
     def attributes

lib/vm/function.rb

@@ -56,7 +56,6 @@ module Vm
     
     def assemble io
       @entry.assemble(io)
-      raise @body.inspect
       @body.assemble(io)
       @exit.assemble(io)
     end

lib/vm/values.rb

@@ -36,7 +36,6 @@ module Vm
       end
       t
     end
-    
   end
 
   class Word < Value
@@ -61,6 +60,21 @@ module Vm
     end
   end
 
+  class Variable < Value
+    attr_reader :name , :register
+    def initialize name , register = nil , val = nil
+      super(val)
+      @register = register
+      @name = name
+    end
+    def length
+      @value.length
+    end
+    def assemble io
+      @value.load @register
+    end
+  end
+
   # The name really says it all.
   # The only interesting thing is storage.
   # Currently string are stored "inline" , ie in the code segment.