can not find TDictionary

[isml]

Hi, everyone. I search the internet and find in Delphi I can "use System.Generics.Collections", but in lazarus I can not find this unit.How could I use TDictionary?

[balazsszekely]

You need a newer version of FPC. AFAIK Generics.Collections is part of FPC trunk for almost two years now. The TDictionary from Generics.Collections is compatible with the one from Delphi System.Generics.Collections. For older versions of FPC,  the closest to TDictionary is TFPGMap from unit fgl. You can give it a try.

[Thaddy]

There is a version of generics.collections available that works with 3.0.4.
https://github.com/maciej-izak/generics.collections
(as per http://forum.lazarus.freepascal.org/index.php/topic,40404.msg279118.html#msg279118 )

[isml]

I am using lazarus 1.8.2, the newest edition. But when I "use Generics.Collections", there are compile error. What package should I add?

[isml]

There is a version of generics.collections available that works with 3.0.4.
https://github.com/maciej-izak/generics.collections
(as per http://forum.lazarus.freepascal.org/index.php/topic,40404.msg279118.html#msg279118 )

Is there a built-in library? If not, I would try this.

[balazsszekely]

@isml
You're mixing Lazarus with FPC. Lazarus 1.8.2 comes with FPC 3.0.4 and generics.collection is not included by default, so you have two solution:
1. Use a newer version of FPC, you can install a separate instance of Lazarus/FPC with fpcupdeluxe.exe(http://forum.lazarus.freepascal.org/index.php/topic,34645.0.html). It won't interfere with your current installation.
2. Install the package mentioned by @Thaddy

[isml]

Now I know where the problem is. Thanks for all the reply.

[Thaddy]

@isml
You're mixing Lazarus with FPC. Lazarus 1.8.2 comes with FPC 3.0.4 and generics.collection is not included by default, so you have two solution:
1. Use a newer version of FPC, you can install a separate instance of Lazarus/FPC with fpcupdeluxe.exe(http://forum.lazarus.freepascal.org/index.php/topic,34645.0.html). It won't interfere with your current installation.
2. Install the package mentioned by @Thaddy

2 .Which I can highly recommend if you are coming from Delphi and don't want a double installation. 3.0.4 is stable.
Just download from github and unpack in a directory. No further installation is needed. Just make sure it is in the path.