官方的正则表达式组件 RegularExpressions (3) : TMatchEvaluator

unit Unit1;interfaceuses  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,  Dialogs, StdCtrls, RegularExpressions;type  TForm1 = class(TForm)    Memo1: TMemo;    Button1: TButton;    procedure Button1Click(Sender: TObject);  private    function MyMatchEvaluator(const Match: TMatch): string; //TMatchEvaluator = function(const Match: TMatch): string of object;  public  end;var  Form1: TForm1;implementation{$R *.dfm}const  pattern = '[A-Z]+\d+';  txt = 'AAA1 BBB2 AA11 BB22 A111 B222 AAAA';procedure TForm1.Button1Click(Sender: TObject);begin  Memo1.Text := TRegEx.Replace(txt, pattern, MyMatchEvaluator); //aaa1 bbb2 aa11 bb22 a111 b222 AAAAend;function TForm1.MyMatchEvaluator(const Match: TMatch): string;begin  Result := LowerCase(Match.Value);end;end.