Top-level type signatures in TcGblEnv?

[Edsko de Vries]

I'm sorry, I don't see any location information ("Located .." types) in
tcg_type_env?

Edsko


On Mon, Feb 25, 2013 at 3:22 PM, Simon Peyton-Jones
<simonpj at microsoft.com>wrote:

>  Can’t you just use the range of the tcg_type_env?
>
> Simon****
>
> ** **
>
> *From:* Edsko de Vries [mailto:edskodevries at gmail.com]
> *Sent:* 18 February 2013 14:03
> *To:* Simon Peyton-Jones
> *Cc:* ghc-devs at haskell.org
> *Subject:* Top-level type signatures in TcGblEnv?****
>
> ** **
>
> Dear Simon, other ghc devs,****
>
> ** **
>
> I hooked into genericHscRecompile to traverse the typechecked source and
> construct an environment of type****
>
> ** **
>
>      [(SrcSpan, Id)]****
>
> ** **
>
> recording all identifiers in the source with their type, definition site,
> etc. To be precise, I am traversing the ****
>
> ** **
>
>     tcg_binds     :: LHsBinds Id,           -- Value bindings in this
> module****
>
> ** **
>
> field of the TcGblEnv structure returned by the type checker. The problem
> is that I have so far been unable to find top-level user-supplied type
> annotations inside LHsBinds. The closest thing I've found is the PostTcType
> of a MatchGroup, but that is not Located; what I'm really looking for is an
> LSig. ****
>
> ** **
>
> Now, let-bindings get a HsValBindsLR instead of an LHsBinds, and that
> *does* contain signatures. My question is two-fold:****
>
> ** **
>
> 1. First, am I missing something? Are there LSigs somewhere inside the
> TcGblEnv where I simply haven't seen them?****
>
> ** **
>
> 2. If not, is there a good reason why tcg_binds is an LHsBinds rather than
> an HsValBindsLR? And if there isn't, would you accept a patch making the
> change?****
>
> ** **
>
> Thanks,****
>
> ** **
>
> Edsko****
>
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