more random code

lib/vm/context.rb

@@ -0,0 +1,53 @@
+require_relative "kernel"
+
+module Vm
+  class Context
+    def initialize 
+      @locals = {}
+    end
+    def get name
+      @locals[name]
+    end
+  end
+end
+
+# ast classes
+module Parser
+  Expression.class_eval do
+    def compile builder , context
+      raise "abstract #{self.inspect}"
+    end
+  end
+
+  IntegerExpression.class_eval do
+  end
+
+  NameExpression.class_eval do
+  end
+
+  StringExpression.class_eval do
+    def compile builder , context
+      return string
+    end
+  end
+
+  FuncallExpression.class_eval do
+    def compile builder , context
+      arguments = args.collect{|arg| arg.compile(builder , context) }
+      function = context.get(name)
+      unless function
+        function = Vm::Kernel.send(name)
+        context.add_function( name , function )
+      end
+      
+    end    
+  end
+
+  ConditionalExpression.class_eval do
+  end
+
+  AssignmentExpression.class_eval do
+  end
+  FunctionExpression.class_eval do
+  end
+end