On 12.07.2013 02:22, Richard A. O'Keefe wrote:
For what it's worth,
let x = 1 in
- let x = x+1 in
- let x = x+2 in
- x;;
prints
val it : int = 4
in the F# interactive system, but
let x = 1 in
- let x = x+1 in
- let x = x+2 in
- x;;
prints Duplicate definition of x at the
Hello all,
I have a type (Mail) which consists of hash and a list, where the hash
keeps some redundant data of the list for faster access. I can add and
remove elements to values of this type using custom functions, called
push and pop.
Now I wanted to write some quick checks, but I have no clue
* martin martin.drautzb...@web.de [2013-07-12 08:33:54+0200]
Hello all,
I have a type (Mail) which consists of hash and a list, where the hash
keeps some redundant data of the list for faster access. I can add and
remove elements to values of this type using custom functions, called
push
It looks like cabal repl [1] could solve this kind of problems, but it is
not clear when it will be merged in cabal HEAD.
[1] https://github.com/haskell/cabal/issues/375
KInd regards,
Kirill Zaborsky
четверг, 11 июля 2013 г., 15:55:15 UTC+4 пользователь Kirill Zaborsky
написал:
Currently
Thanks Roman. Tried it and implemented, but had troubles until I realized that
for String, 10 test take quite long. :-)
However, I decided to solve this problem in a more natural way
Original Message
Subject: Re: [Haskell-cafe] Comparing functions
From: Roman Cheplyaka
Hello all,
My problem is the following: I have my own data types, and I'd like to
derive automatically instances of some type class from them. I've started
looking at GHC.Generics, which offer tools to do exactly that. However,
some functions of my typeclass do not take my data type as a
Well, in your case, you need not 'from', but 'to', in order to convert
from a generic representation to yours.
Take a look at how a similar task is done in SmallCheck:
https://github.com/feuerbach/smallcheck/blob/master/Test/SmallCheck/Series.hs#L180
Yes, this looks like a similar task, thanks a million!
JP
On Fri, Jul 12, 2013 at 10:57 AM, Roman Cheplyaka r...@ro-che.info wrote:
Well, in your case, you need not 'from', but 'to', in order to convert
from a generic representation to yours.
Take a look at how a similar task is done in
Hello everyone,
Is there a way to automatically reify a type ?
In other words, to do the following:
reifyType (LitT ...) = ConT ''LitT ...
I am using Template Haskell and I want the generated code to have
access to Type datatypes that were available to the Template Haskell
code.
Cheers,
Jose
Hello!
I'm not sure if this is what you're asking for, as it doesn't fit that line
of code. 'LitT' is a data constructor not a type constructor. So instead
it'd be
reifyType (LitT ...) = ConE 'LitT ...
If this is what you're looking for, then 'lift' is what you want:
That's exactly what I mean!
I'll give it a try.
Thanks Michael,
Jose
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Hello,
I am getting the following error message:
No instance for (Lift Type)
arising from a use of `lift'
Possible fix: add an instance declaration for (Lift Type)
I have imported Language.Haskell.TH.Instances.
Is there anything else I have to do ?
Regards,
Jose
You might need to cabal update - I recently uploaded a new version to
hackage, because I realized the package was a bit out of date from the
github repo.
It works for me: https://gist.github.com/mgsloan/f9238b2272df43e53896
On Fri, Jul 12, 2013 at 5:49 AM, Jose A. Lopes jabolo...@google.com
When I implemented this stuff yesterday, I included `Deep` variants for
each function which used NFData. I'm debating whether I think the right
recommendation is to, by default, use the `async`/NFData versions of catch,
handle, and try, or to have them as separate functions.
I wrote up the blog
So haddock ignores {-# LANGUAGE CPP #-}, which makes it crash on any
file that uses it. But if you pass --optghc=-cpp, it runs CPP on
everything, which makes it crash on any file that uses string gaps, or
happens to contain a /*. /* is rare and easily fixed, but not string
gaps.
It looks like a
On Fri, Jul 12, 2013 at 2:25 PM, Evan Laforge qdun...@gmail.com wrote:
In the broader scheme, it seems perverse to be using CPP in the first
place. I use it to configure imports and exports, e.g. to swap out a
driver backend on different OSes, and to export more symbols when
testing. Would
* Evan Laforge qdun...@gmail.com [2013-07-12 14:25:00-0400]
So haddock ignores {-# LANGUAGE CPP #-}, which makes it crash on any
file that uses it.
I'm pretty sure it's not true in general.
If you click on the Source link at this haddock page:
Are you using `cabal haddock` or calling haddock manually?
Cheers,
On Fri, Jul 12, 2013 at 3:25 PM, Evan Laforge qdun...@gmail.com wrote:
So haddock ignores {-# LANGUAGE CPP #-}, which makes it crash on any
file that uses it. But if you pass --optghc=-cpp, it runs CPP on
everything, which
I'm calling haddock myself. Cabal might have some special magic for CPP,
when I searched for haddock CPP I got some old bugs about adding cabal
support. So presumably it's possible.
On Jul 12, 2013 1:15 PM, Felipe Almeida Lessa felipe.le...@gmail.com
wrote:
Are you using `cabal haddock` or
I guess that cabal preprocesses the files before calling Haddock then.
Perhaps that's why it asks me to `cabal configure` before `cabal
haddock`ing =). If you're able to switch over to cabal, that may be
the easiest solution.
Cheers,
On Fri, Jul 12, 2013 at 6:31 PM, Evan Laforge
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