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