[Haskell-cafe] Re: Top Level <-

[Ganesh Sittampalam]

On Sun, 7 Sep 2008, Ashley Yakeley wrote:

> Ganesh Sittampalam wrote:
>> Suppose I am writing something that I intend to be used as part of a 
>> plug-in that is reloaded in different forms again and again. And I see 
>> module K which does something I want, so I use it. It so happens that K 
>> uses M, which has a <-. If I knew that using K in my plug-in would cause a 
>> memory leak, I would avoid doing so; but since the whole point of <- is to 
>> avoid making the need for some state visible in the API.
>
> The results from the <- in M will only be stored once for the life of the 
> RTS, no matter how many times your plug-ins are reloaded.

Sorry, I keep forgetting that. OK, so you can't get an endless stream of 
leaks unless you use <- yourself, or modules on your system keep getting 
upgraded to new versions.

Ganesh