Using onOutOfMemoryError in C wrappers

[Basile B.]

On Wednesday, 24 March 2021 at 08:51:34 UTC, Per Nordlöw wrote:
> On Wednesday, 24 March 2021 at 08:31:19 UTC, Basile B. wrote:
>> There are several ways to do that. In addition to 
>> onOutOfMemoryError, you can use a static instance
>>
>>   void v() @nogc nothrow
>>   {
>>     __gshared oom = new OutOfMemoryError();
>>     auto X* = X_create();
>>     if (X is null)
>>         throw oom;
>>   }
>
> How is that better than
>
>     void v() @nogc nothrow
>     {
>         auto X* = X_create();
>         if (X is null)
>             onOutOfMemoryError();
>     }
>
> considering the fact that accessing `__gshared` state is 
> neither `@safe` nor `pure`? Which, in turn, makes `v()` 
> unconditionally unsafe and unpure regardless of safety and 
> purity of `X_create()`.

In now way. But in your question you mentioned @nogc nothrow and 
not @safe and pure.