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digitalmars.D.learn - Help with DynamicArray of Emsi Containers

reply =?UTF-8?Q?Christian_K=c3=b6stlin?= <christian.koestlin gmail.com> writes:
I am struggling with initializing an Emsi Containers DynamicArray in a 
nice way. Some background information of my usecase:

I experimenting in porting some old 3d engine code of mine from c++ to 
dlang. In the engine I want to exactly control when resources are freed 
and not rely on the garbage collector. For that I am using reference 
counters courtesy of autoptr.

e.g.

```d

alias Texture = IntrusivePtr!TextureData; // dub package autoptr
class TextureData
{
   IFImage image; // dub package imagefmt
}

```


another class of mine now is supposed to hold several of those textures 
for multitexturing and should be initialized in its constructor:

```d
class Appearance
{
   Texture[] textures;
   this(Texture[] textures)
   {
     this.textures = textures;
   }
}
```
Unfortunately this does not work properly together with autoptr's (see 
https://github.com/submada/autoptr/issues/5#issuecomment-997683868).

Because of that I am using now DynamicArrays from Emsi Containers, but I 
am having trouble initializing them:

```d
class Apperance
{
   DynamicArray!Texture textures;
   this(DynamicArray!Texture textures)
   {
     this.textures = textures;
   }
}
```
does not compile.

What would be the best way to initialize the variable?

Kind regards,
Christian
Apr 30 2022
parent reply vit <vit vit.vit> writes:
On Saturday, 30 April 2022 at 20:22:43 UTC, Christian Köstlin 
wrote:

 I am struggling with initializing an Emsi Containers 
 DynamicArray in a nice way. Some background information of my 
 usecase:

 I experimenting in porting some old 3d engine code of mine from 
 c++ to dlang. In the engine I want to exactly control when 
 resources are freed and not rely on the garbage collector. For 
 that I am using reference counters courtesy of autoptr.

 e.g.

 ```d

 alias Texture = IntrusivePtr!TextureData; // dub package autoptr
 class TextureData
 {
   IFImage image; // dub package imagefmt
 }

 ```


 another class of mine now is supposed to hold several of those 
 textures for multitexturing and should be initialized in its 
 constructor:

 ```d
 class Appearance
 {
   Texture[] textures;
   this(Texture[] textures)
   {
     this.textures = textures;
   }
 }
 ```
 Unfortunately this does not work properly together with 
 autoptr's (see 
 https://github.com/submada/autoptr/issues/5#issuecomment-997683868).

 Because of that I am using now DynamicArrays from Emsi 
 Containers, but I am having trouble initializing them:

 ```d
 class Apperance
 {
   DynamicArray!Texture textures;
   this(DynamicArray!Texture textures)
   {
     this.textures = textures;
   }
 }
 ```
 does not compile.

 What would be the best way to initialize the variable?

 Kind regards,
 Christian


DynamicArray has disabled postblit (is not copyable).


Package autoptr is deprecated (internaly redirected to 
btl:atuoptr), all functionality is moved to package 
[BTL](https://code.dlang.org/packages/btl) (subpackage 
btl:autoptr). This library contains subpackage btl:vector with 
functionality like DynamicArray with support for copying. I use 
IntrusivePtr inside Vector/SmallVector and i have no problems.
May 01 2022
parent =?UTF-8?Q?Christian_K=c3=b6stlin?= <christian.koestlin gmail.com> writes:
On 2022-05-01 09:12, vit wrote:

 DynamicArray has disabled postblit (is not copyable).
 
 
 Package autoptr is deprecated (internaly redirected to btl:atuoptr), all 
 functionality is moved to package 
 [BTL](https://code.dlang.org/packages/btl) (subpackage btl:autoptr). 
 This library contains subpackage btl:vector with functionality like 
 DynamicArray with support for copying. I use IntrusivePtr inside 
 Vector/SmallVector and i have no problems.


Thanks a lot for those pointers, I changed/upgraded my dependencies, and 
it already looks better.
May 01 2022