Oh, and I think that using sameTVar# for primop and sameTVar for wrapper is a 
good choice, even if we make transition slightly more difficult. This naming 
feels better to me and I think there are few libraries that will need to 
adjust. So I vote to keep these names as they are.

Janek

----- Oryginalna wiadomość -----
Od: "Jan Stolarek" <jan.stola...@p.lodz.pl>
Do: "Simon Peyton-Jones" <simo...@microsoft.com>
DW: ghc-devs@haskell.org, "Gabor Greif" <ggr...@gmail.com>
Wysłane: czwartek, 22 sierpień 2013 14:43:29
Temat: Re: Changes to primops break libraries (was Re: 7.8 Feature window)

> 1. Why do you say "this naming feels more consistent"?  Consistent with what?
Convention is that functions ending with # operate on unboxed values and return 
unboxed values (usually), so to me it seemed consistent that sameTVar# returns 
an unboxed value, while sameTVar does not. I raised that problem on the Trac 
(http://ghc.haskell.org/trac/ghc/ticket/6135#comment:72) and the only answer I 
got was from Ian:

"Regarding the name of sameMutableArray#, I don't have a strong opinion. I 
suspect there are few users of the function, so personally I'd be inclined to 
use the most consistent names. "

So I assumed that everyone else agrees.

But anyway, this can be changed easily. We just need to agree on the names.

> 2.  The module name PrimWrappers is terrible, because it's so close to 
> PrimopWrappers
Yes, I also don't like that similarity in names, but I don't think that current 
name is terrible - if I write sth like this:

  import GHC.Prim
  import GHC.PrimWrappers

it seems to be clearer whta the second module might contain, than if I write

  import GHC.Prim
  import GHC.BoolOpWrappers

Again, I can change this, but we have to decide on a name. CmpOpWrappers is not 
good IMO - not all wrappers are for comparisons!

> 3. Could you add a section "Breaking changes" to 
> http://ghc.haskell.org/trac/ghc/wiki/PrimBool to explain what to change.  
Yes, I was thinking about that yesterday when I realized that second person 
asks the question which was already answered on the wiki. I wasn't sure where 
to put information about breaking changes so that it is easy to find for people 
who need it. I think that I'll make a spearate page on the wiki and link to it 
from release notes.

Janek


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