public LoxFunction findMethod(string name)
{
if (methods.ContainsKey(name))
{
return(methods[name]);
}
if (superclass != null)
{
return(superclass.findMethod(name));
}
return(null);
}
public object get(Token name)
{
if (fields.ContainsKey(name.lexeme))
{
return(fields[name.lexeme]);
}
LoxFunction method = klass.findMethod(name.lexeme);
if (method != null)
{
return(method.bind(this));// method;
}
throw new RuntimeError(name, "Undefined property '" + name.lexeme + "'.");
}
public object visitSuperExpr(Expr.Super expr)
{
int distance = locals[expr];
LoxClass superclass = (LoxClass)environment.getAt(distance, "super");
// "this" is always one level nearer than "super"'s environment
LoxInstance object_ = (LoxInstance)environment.getAt(distance - 1, "this");
LoxFunction method = superclass.findMethod(expr.method.lexeme);
if (method == null)
{
throw new RuntimeError(expr.method, "Undefined property '" + expr.method.lexeme + "'.");
}
return(method.bind(object_));
}