Dismiss Notice

REGISTRATION IS AFTER ADMIN ACTIVATION

DONATIONS WITH PAYPAL CLICK TO BUTTON

1 MONTH VIP - 5$; 3 MONTHS VIP - 10$; 6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$

DONATIONS WITH Bitcoin Address:3NRs3CK3fhXifrNYxHEZKpETDd9vNLMsMD

Dismiss Notice
The registration is approved by the Administrator. It takes about 1 day to approve your registration
Dismiss Notice
For open hidden message no need write thanks, thank etc. Enough is click to like button on right side of thread.

call a function whose name is stored in a stringtype TMyFuncType = function(a: inte

Discussion in 'Delphi Help&Requests' started by Lgogo, Feb 15, 2014.

  1. Lgogo
    Offline

    LgogoLgogo is a Featured Member DF Expert DF Donator

    If you just need to call one particular type of functions (say, function(integer, integer): string), it's a lot easier.

    Declare a function type, then get a function pointer and cast it like this:

    Code:
    type
      TMyFuncType = function(a: integer; b: integer): string of object;
    
      TMyClass = class
      published
        function Func1(a: integer; b: integer): string;
        function Func2(a: integer; b: integer): string;
        function Func3(a: integer; b: integer): string;
      public
        function Call(MethodName: string; a, b: integer): string;
      end;
    
    function TMyClass.Call(MethodName: string; a, b: integer): string;
    var m: TMethod;
    begin
      m.Code := Self.MethodAddress(MethodName); //find method code
      m.Data := pointer(Self); //store pointer to object instance
      Result := TMyFuncType(m)(a, b);
    end;
    
    {...}
    
    //use it like this
    var MyClass: TMyClass;
    begin
      MyClass := TMyClass.Create;
      MyClass.Call('Func1', 3, 5);
      MyClass.Call('Func2', 6, 4);
      MyClass.Destroy;
    end.
     
  2. BraveSofts
    Offline

    BraveSofts Guest

    RE:

    th'x but it need if you don't mind a small example to be Understood Very well..
    by the way , a great job you do.
     

Share This Page

Laws
Our website, law, laws, copyright and aims to be respectful of individual rights. Our site, as defined in the law of 5651 serves as a provider of space. According to the law, contrary to the law of site management has no obligation to monitor content. Therefore, our site has adopted the principle of fit and remove. Works are subject to copyright laws and is shared in a manner that violated their legal rights, or professional associations, rights holders who, adsdelphi@gmail.com I can reach us at e-mail address. Complaints considered to be infringing on the examination of the content will be removed from our site.
Donate Help To Us and Be VIP
DONATIONS WITH PAYPAL CLICK TO BUTTON
6 MONTHS VIP - 20$; 1 YEAR VIP - 30$; 2 YEARS VIP - 50$; GOLD USER FOR LIFE VIP - 150$
Social Block