private Expression CallMacro(Bindings scope)
{
var firstElem = Elements.First();
var macro = scope.Resolve(firstElem.Token.Text) as Macro;
return macro.ExpandAndEvaluate(Elements.Skip(1), scope);
}
private bool IsMacro(Expression expr, Bindings scope)
{
return expr is SymbolExpression
&& scope.Resolve(expr.Token.Text) is Macro;
}