forcing "@nogc" on class destructors

[Freddy via Digitalmars-d]

On Tuesday, 20 January 2015 at 18:12:27 UTC, ketmar via 
Digitalmars-d wrote:
> Hello.
>
> as there is no possibility to doing GC allocations in class
> destructors, wouldn't it be nice to just force "@nogc" 
> attribute on
> such dtors?
>
> i know, i know, "this will break alot of code". i'm pretty sure 
> that
> this will break alot of INVALID code, which better be broken at
> compile-time anyway.
>
> sure, we have alot of code of pre- at nogc era, and alot of code 
> where
> authord didn't bother to add attributes at all. so we can 
> introduce
> "--force-dtor-nogc" CLI arg and document this change, making it 
> opt-in
> for, say, six month and opt-out after that.
>
> and i know that D devs (Walter at least) are resistant to 
> command-line
> flags that changing compiler behavior. i don't know how to 
> overcome
> this. say, by adding "@gc" attribute, which dfix can 
> automatically add?
>
> but i still believe that instead of telling people again and 
> again that
> they should not allocate in class destructors, we can use 
> computer
> itself to track and stop this behavior.
>
> let's see how this proposal will be rejected. will there be 
> some sane
> reasons, or only the good old song about "broken code"? make 
> your bets!
Not an error, Make it a warning.