public DomConverter(CodeCompletionController controller)
 {
 	stv = new DomSyntaxTreeVisitor(this);
 	this.controller = controller;
 	if (standard_units == null) InitModules();
 }
		public ExpressionVisitor(expression expr, SymScope entry_scope, DomSyntaxTreeVisitor stv)
		{
			this.expr = expr;
			this.entry_scope = entry_scope;
            this.stv = stv;
		}