[Template-haskell] Re: template-haskell names in 6.3

[Keean Schupke]

I think I am already using that... I wasn't sure if the 'module-part' of the
name was the same as in a global name generated from ''... is:

module Foo
data Test

mkName "Foo.Test" == ''Test -- is this true?

    Keean

Simon Peyton-Jones wrote:

>Keean
>
>I was half way through implementing this when I realised it's there
>already. If you say
>
>	mkName "Foo.baz"
>
>you'll get a dynamically scoped qualified name, just as you want.
>
>Is that OK?  
>
>Simon
>
>| -----Original Message-----
>| From: template-haskell-bounces at haskell.org
>[mailto:template-haskell-bounces at haskell.org] On
>| Behalf Of Keean Schupke
>| Sent: 03 December 2004 14:38
>| To: Simon Peyton-Jones
>| Cc: template-haskell at haskell.org
>| Subject: Re: [Template-haskell] Re: template-haskell names in 6.3
>| 
>| Simon Peyton-Jones wrote:
>| 
>| >do you mean
>| >	n <- newName s
>| >or
>| >	let n = mkName s
>| >?
>| >
>| >
>| I mean the latter... or perhaps: "n <- return $ mkName s"...
>| 
>| >If the latter, you will get
>| >	data Foo = Foo Foo
>| >
>| >... and then I see what you want.  You want a version of mkName that
>is
>| >like giving a qualified name in Haskell.  It's dynamically scoped
>just
>| >like mkName, but it obeys the usual rules for qualified names in
>| >Haskell.
>| >
>| >To be totally explicit, suppose I have
>| >
>| >	foo = [| mkQualName "Foo" "baz" |]
>| >
>| >then if I call foo thus
>| >
>| >	wibble = \baz -> $foo
>| >
>| >the $foo splice will expand to "Foo.baz", and that won't see the
>\baz;
>| >it'll see whatever Foo.baz is in scope.
>| >
>| >
>| This is exactly what I am after...
>| 
>| >Is that what you seek?  I can see it's reasonable.  I'd need to add
>| >
>| >	mkQualName :: String -> String -> Name
>| >
>| >That'd mean an extra form of Name.  Currently, if you say
>| >	'Foo.baz
>| >you'll get a Name whose nameModule isn't necessarily Foo... it'll be
>the
>| >module that baz was actually defined in.
>| >
>| >
>| I'll leave that up to you, I don't mind if this translation happens,
>as
>| long as it refers to the Foo.baz in dynamic scope the actuall name
>| can change.
>| 
>|     Keean
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>