Creating 1000 instances

[Ferhat Kurtulmuş]

On Friday, 19 February 2021 at 08:04:19 UTC, Виталий Фадеев wrote:
> We have:
>     class File
>     {
>         // WIN32_FIND_DATAW data;
>     }
>
>     void fastReadDir()
>     {
>         File[] files;
>
>         // reserve space, allocating instances
>         files = new File[]( 1000 );  // <--- trouble here ?
>
>         // filling instances
>         auto file = files.ptr;
>
>         writeln( file.data );    // <--- or trouble here ?
>
>         // ...
>     }
>
> Got:
>     SegFault
>
> Goal:
>     Allocate memory for 1000 instances at once.
>
> Source:
>     https://run.dlang.io/is/xfaXcv
>
> Question:
>     What is the true, fastest, beauty way to create 1000 
> instances of the class File ?

files = new File[]( 1000 );
files[] = new File(); // add this

Since classes are reference types all instances of files will be 
the same reference of "new File()", which you probably don't want.