public object Visit(Expr.Call expr)
{
object callee = Evaluate(expr.callee);
List <object> arguments = new List <object>();
foreach (Expr arg in expr.arguments)
{
arguments.Add(Evaluate(arg));
}
if (!(callee is ILoxCallable))
{
throw new RuntimeError(expr.paren, "Can only call functions and classes.");
}
ILoxCallable function = (ILoxCallable)callee;
if (arguments.Count != function.Arity)
{
throw new RuntimeError(expr.paren, "Expected " + function.Arity
+ " arguments but got " + arguments.Count + ".");
}
return(function.Call(this, arguments));
}
public object Visit(Expr.Call expr)
{
Resolve(expr.callee);
foreach (Expr arg in expr.arguments)
{
Resolve(arg);
}
return(null);
}