我不知道为什么嵌套类型的范围不包括Delphi中的派生类;它可以使代码更干净:
type TBaseTest = class public type PVector = ^TVector; TVector = record A,B,R: Integer; end; public procedure Execute(var Vector: TVector); virtual; abstract; end; TTestA = class(TBaseTest) public // E2003 Undeclared identifier: 'TVector' procedure Execute(var Vector: TVector); override; // workaround: // procedure Execute(var Vector: TBaseTest.TVector); override; end;