delphi泛型模板编程

delphi泛型模板编程

泛型模板编程的关键：泛型作用体现在模板，体现在虚实之间相互转换，以虚概实，以实就虚。

unit TxInfo;

interface

uses
  System.Types,
  System.Classes,
  System.SysUtils,
  Generics.Collections;

type
  TPeople = record
    Name: string;
    Age: string;
  end;

type
  TTxInfo<T> = class
  public
    PeopleList: TList<T>;
  public
    constructor Create;
    destructor Destroy; override;
  private
    function ProcessInfo(aAPeopleStr: string): T; virtual; abstract;
  public
    procedure GetInfo(AStr: string); overload;
  end;

type
  TMyNetInfo<T> = class(TTxInfo<T>)//泛型类可以继承
  public
    function ProcessInfo(APeopleStr: string): T; override;
  end;

implementation

{ TTxHttp }
constructor TTxInfo<T>.Create;
begin
  inherited Create();
  PeopleList := TList<T>.Create;
end;

destructor TTxInfo<T>.Destroy;
begin
  PeopleList.Free;
  inherited Destroy;
end;

procedure TTxInfo<T>.GetInfo(AStr: string);
var
  m_Info: T;
begin
  PeopleList.Clear;
  m_Info := ProcessInfo(AStr);
  PeopleList.Add(m_Info);
end;

{ TMyNetInfo<TFilmInfoT> }
function TMyNetInfo<T>.ProcessInfo(APeopleStr: string): T;
begin
  var pepole: TPeople;
  pepole.Name:= APeopleStr;
  Result:=T(Pointer(@pepole)^);//实转虚，泛型就是可以在虚实之间相互转换
end;

end.