Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Manuel M T Chakravarty]

And while we are dreaming, in an iOS port of GHCi (meaning GHCi runs on iOS and 
doesn't just generate code for it), it would be great to make bytecode 
persistent — ie, the bytecode that GHCi currently generates internally to 
interpret programs should be serialized to save and load it.  (Note that iOS 
apps are not allowed to generate binary code, so we wouldn't need the gcc tool 
chain etc, but just have a stripped down GHCi that generates bytecode only.  
All pre-compiled libraries that are part of the GHCi app can of course still be 
native code and load and interact with the interpreter as usual.)

Manuel


Don Stewart:
> Oh, Scheme is trivial to implement, when compared with Haskell. So
> people write it from scratch as a tutorial exercise.
> 
> Haskell isn't trivial to implement from scratch, so instead we port
> existing implementations mostly.
> 
> That means really, porting Hugs or GHC. And you've been pointed at examples.
> 
> I think people are clearly keen for this, now it is a small matter of
> programming talent and will.
> 
> -- Don
> 
> On Sat, Jun 18, 2011 at 3:03 PM, John Velman  wrote:
>> On Sat, Jun 18, 2011 at 10:44:01PM +0400, MigMit wrote:
>> 
>> Well, this is my point.  THERE ARE 3 SCHEME INTERPRETERS in the iPad app
>> store.
>> 
>> They run on factory iPads, not jailbroken.
>> 
>> The GUI for the gambitREPL  (Read, Evaluate, Print, Loop) is just like a
>> console.   Input a scheme expression.  CR. Answer appears, new prompt.
>> 
>> In haskell we need to allow for some way to input layout.  I don't recall
>> how Hugs handles this, if at all.
>> 
>> There are probably 5 or 10 people out there who want to learn functional
>> programming, and they are studying Scheme on their iPads.  Or Ocaml.
>> 
>> I don't forsee doing production programming ON THE IPAD, but experimenting,
>> testing some functions, and, by the way, learning Haskell.
>> 
>> While I'm fantasizing, something like Hugs or ghci with SOE would really be
>> neat.
>> 
>> Sorry for shouting  :-)
>> 
>> John Velman
>> 
>>> Well, Haskell is fun, isn't it? And that's what iPhone is perfect for: fun.
>>> 
>>> Back when I had iPod Touch 1G (jailbroken, of course), I used to run Hugs 
>>> on it. Now I would love to see a Haskell interpreter in the App Store -- 
>>> which, by the way, is possible; as there are Scheme interpreters there, why 
>>> not Haskell?
>>> 
>>> Отправлено с iPhone
>>> 
>>> Jun 18, 2011, в 22:27, Jack Henahan  написал(а):
>>> 
 I suppose you could make a GUI, by why? Given that you'll have to be 
 working on a jailbroken device, anyway, one could just as well use one of 
 the numerous terminal emulators now floating around for jailbroken iOS. 
 That said, the idea of people writing Haskell on phones and iPads and so 
 on makes me just a little bit grinny.
 
 On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:
 
> 
> 
> On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
> To further emphasize, I'd like to type in (or paste in) Haskell code and
> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
> on the iPad.
> 
> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
> supports cross-compilation, you can compile GHC for iOS.  I guess you 
> could cross compile Hugs with GCC.  Doing so probably isn't trivial, but 
> it should be straightforward.
> 
> I bet you could even use Xcode to make a graphical user interface to GHCi.
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Alexander Solla]

On Sun, Jun 19, 2011 at 8:44 AM, Tom Murphy  wrote:

> On 6/18/11, Alexander Solla  wrote:
> >
> > Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now
> > supports cross-compilation, you can compile GHC for iOS.
>
>
> Can you provide a link for info? I don't understand how this would be done.


This was news to me too.  I haven't read anything relevant in the GHC manual
(but then, I haven't looked for quite a while).  I said "apparently",
because of the contents of this link:

http://www.haskell.org/haskellwiki/IPhone#GHC_as_a_cross_compiler
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Jack Henahan]

Well, strictly speaking, GHC only supports self-cross-compilation, id est 
porting[1], cf. [2]. For more information on cross compilation generally, refer 
to the wiki page[3]. Does that answer your question, or did you have something 
else in mind?


[1]:http://hackage.haskell.org/trac/ghc/wiki/Building/Porting
[2]:http://hackage.haskell.org/trac/ghc/wiki/CrossCompilation
[3]:http://en.wikipedia.org/wiki/Cross_compiler

On Jun 19, 2011, at 11:44 AM, Tom Murphy wrote:

> On 6/18/11, Alexander Solla  wrote:
>> 
>> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now
>> supports cross-compilation, you can compile GHC for iOS.
> 
> 
> Can you provide a link for info? I don't understand how this would be done.
> 
> Thanks
> Tom
> 
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Tom Murphy]

On 6/18/11, Alexander Solla  wrote:
>
> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now
> supports cross-compilation, you can compile GHC for iOS.


Can you provide a link for info? I don't understand how this would be done.

Thanks
Tom

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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Malcolm Wallace]

On 18 Jun 2011, at 20:19, Jack Henahan wrote:

> but the dev would either be forced into Hugs, or they'd have to implement a 
> more portable GHC. Does such a thing exist already?

Just as a point of interest, the original nhc compiler was original written for 
an ARM architecture machine (Acorn Archimedes) with 2Mb of memory.  Its 
successor, nhc98, can be bootstrapped from C sources, and always aimed to be as 
portable as possible.  The project is largely unmaintained now, so there is 
likely to be some bitrot, but it would probably work OK with some effort.
Regards,
Malcolm

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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Jack Henahan]

Oh, wow, I'd never seen gambitREPL, just the (pretty terrible) iScheme. That's 
pretty neat. It's probably quite doable, then, but the dev would either be 
forced into Hugs, or they'd have to implement a more portable GHC. Does such a 
thing exist already?

On Jun 18, 2011, at 3:03 PM, John Velman wrote:

> On Sat, Jun 18, 2011 at 10:44:01PM +0400, MigMit wrote:
> 
> Well, this is my point.  THERE ARE 3 SCHEME INTERPRETERS in the iPad app
> store.
> 
> They run on factory iPads, not jailbroken.
> 
> The GUI for the gambitREPL  (Read, Evaluate, Print, Loop) is just like a
> console.   Input a scheme expression.  CR. Answer appears, new prompt.
> 
> In haskell we need to allow for some way to input layout.  I don't recall
> how Hugs handles this, if at all.
> 
> There are probably 5 or 10 people out there who want to learn functional
> programming, and they are studying Scheme on their iPads.  Or Ocaml.
> 
> I don't forsee doing production programming ON THE IPAD, but experimenting,
> testing some functions, and, by the way, learning Haskell.
> 
> While I'm fantasizing, something like Hugs or ghci with SOE would really be
> neat.
> 
> Sorry for shouting  :-)
> 
> John Velman
> 
>> Well, Haskell is fun, isn't it? And that's what iPhone is perfect for: fun.
>> 
>> Back when I had iPod Touch 1G (jailbroken, of course), I used to run Hugs on 
>> it. Now I would love to see a Haskell interpreter in the App Store — which, 
>> by the way, is possible; as there are Scheme interpreters there, why not 
>> Haskell?
>> 
>> Отправлено с iPhone
>> 
>> Jun 18, 2011, в 22:27, Jack Henahan  написал(а):
>> 
>>> I suppose you could make a GUI, by why? Given that you'll have to be 
>>> working on a jailbroken device, anyway, one could just as well use one of 
>>> the numerous terminal emulators now floating around for jailbroken iOS. 
>>> That said, the idea of people writing Haskell on phones and iPads and so on 
>>> makes me just a little bit grinny.
>>> 
>>> On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:
>>> 
 
 
 On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
 To further emphasize, I'd like to type in (or paste in) Haskell code and
 have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
 on the iPad.
 
 Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
 supports cross-compilation, you can compile GHC for iOS.  I guess you 
 could cross compile Hugs with GCC.  Doing so probably isn't trivial, but 
 it should be straightforward.
 
 I bet you could even use Xcode to make a graphical user interface to GHCi.
 ___
 Haskell-Cafe mailing list
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Don Stewart]

Oh, Scheme is trivial to implement, when compared with Haskell. So
people write it from scratch as a tutorial exercise.

Haskell isn't trivial to implement from scratch, so instead we port
existing implementations mostly.

That means really, porting Hugs or GHC. And you've been pointed at examples.

I think people are clearly keen for this, now it is a small matter of
programming talent and will.

-- Don

On Sat, Jun 18, 2011 at 3:03 PM, John Velman  wrote:
> On Sat, Jun 18, 2011 at 10:44:01PM +0400, MigMit wrote:
>
> Well, this is my point.  THERE ARE 3 SCHEME INTERPRETERS in the iPad app
> store.
>
> They run on factory iPads, not jailbroken.
>
> The GUI for the gambitREPL  (Read, Evaluate, Print, Loop) is just like a
> console.   Input a scheme expression.  CR. Answer appears, new prompt.
>
> In haskell we need to allow for some way to input layout.  I don't recall
> how Hugs handles this, if at all.
>
> There are probably 5 or 10 people out there who want to learn functional
> programming, and they are studying Scheme on their iPads.  Or Ocaml.
>
> I don't forsee doing production programming ON THE IPAD, but experimenting,
> testing some functions, and, by the way, learning Haskell.
>
> While I'm fantasizing, something like Hugs or ghci with SOE would really be
> neat.
>
> Sorry for shouting  :-)
>
> John Velman
>
>> Well, Haskell is fun, isn't it? And that's what iPhone is perfect for: fun.
>>
>> Back when I had iPod Touch 1G (jailbroken, of course), I used to run Hugs on 
>> it. Now I would love to see a Haskell interpreter in the App Store -- which, 
>> by the way, is possible; as there are Scheme interpreters there, why not 
>> Haskell?
>>
>> Отправлено с iPhone
>>
>> Jun 18, 2011, в 22:27, Jack Henahan  написал(а):
>>
>> > I suppose you could make a GUI, by why? Given that you'll have to be 
>> > working on a jailbroken device, anyway, one could just as well use one of 
>> > the numerous terminal emulators now floating around for jailbroken iOS. 
>> > That said, the idea of people writing Haskell on phones and iPads and so 
>> > on makes me just a little bit grinny.
>> >
>> > On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:
>> >
>> >>
>> >>
>> >> On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
>> >> To further emphasize, I'd like to type in (or paste in) Haskell code and
>> >> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
>> >> on the iPad.
>> >>
>> >> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
>> >> supports cross-compilation, you can compile GHC for iOS.  I guess you 
>> >> could cross compile Hugs with GCC.  Doing so probably isn't trivial, but 
>> >> it should be straightforward.
>> >>
>> >> I bet you could even use Xcode to make a graphical user interface to GHCi.
>> >> ___
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[John Velman]

On Sat, Jun 18, 2011 at 10:44:01PM +0400, MigMit wrote:

Well, this is my point.  THERE ARE 3 SCHEME INTERPRETERS in the iPad app
store.

They run on factory iPads, not jailbroken.

The GUI for the gambitREPL  (Read, Evaluate, Print, Loop) is just like a
console.   Input a scheme expression.  CR. Answer appears, new prompt.

In haskell we need to allow for some way to input layout.  I don't recall
how Hugs handles this, if at all.

There are probably 5 or 10 people out there who want to learn functional
programming, and they are studying Scheme on their iPads.  Or Ocaml.

I don't forsee doing production programming ON THE IPAD, but experimenting,
testing some functions, and, by the way, learning Haskell.

While I'm fantasizing, something like Hugs or ghci with SOE would really be
neat.

Sorry for shouting  :-)

John Velman

> Well, Haskell is fun, isn't it? And that's what iPhone is perfect for: fun.
> 
> Back when I had iPod Touch 1G (jailbroken, of course), I used to run Hugs on 
> it. Now I would love to see a Haskell interpreter in the App Store — which, 
> by the way, is possible; as there are Scheme interpreters there, why not 
> Haskell?
> 
> Отправлено с iPhone
> 
> Jun 18, 2011, в 22:27, Jack Henahan  написал(а):
> 
> > I suppose you could make a GUI, by why? Given that you'll have to be 
> > working on a jailbroken device, anyway, one could just as well use one of 
> > the numerous terminal emulators now floating around for jailbroken iOS. 
> > That said, the idea of people writing Haskell on phones and iPads and so on 
> > makes me just a little bit grinny.
> > 
> > On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:
> > 
> >> 
> >> 
> >> On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
> >> To further emphasize, I'd like to type in (or paste in) Haskell code and
> >> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
> >> on the iPad.
> >> 
> >> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
> >> supports cross-compilation, you can compile GHC for iOS.  I guess you 
> >> could cross compile Hugs with GCC.  Doing so probably isn't trivial, but 
> >> it should be straightforward.
> >> 
> >> I bet you could even use Xcode to make a graphical user interface to GHCi.
> >> ___
> >> Haskell-Cafe mailing list
> >> Haskell-Cafe@haskell.org
> >> http://www.haskell.org/mailman/listinfo/haskell-cafe
> > 
> > ___
> > Haskell-Cafe mailing list
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[MigMit]

Well, Haskell is fun, isn't it? And that's what iPhone is perfect for: fun.

Back when I had iPod Touch 1G (jailbroken, of course), I used to run Hugs on 
it. Now I would love to see a Haskell interpreter in the App Store — which, by 
the way, is possible; as there are Scheme interpreters there, why not Haskell?

Отправлено с iPhone

Jun 18, 2011, в 22:27, Jack Henahan  написал(а):

> I suppose you could make a GUI, by why? Given that you'll have to be working 
> on a jailbroken device, anyway, one could just as well use one of the 
> numerous terminal emulators now floating around for jailbroken iOS. That 
> said, the idea of people writing Haskell on phones and iPads and so on makes 
> me just a little bit grinny.
> 
> On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:
> 
>> 
>> 
>> On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
>> To further emphasize, I'd like to type in (or paste in) Haskell code and
>> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
>> on the iPad.
>> 
>> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
>> supports cross-compilation, you can compile GHC for iOS.  I guess you could 
>> cross compile Hugs with GCC.  Doing so probably isn't trivial, but it should 
>> be straightforward.
>> 
>> I bet you could even use Xcode to make a graphical user interface to GHCi.
>> ___
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Jack Henahan]

I suppose you could make a GUI, by why? Given that you'll have to be working on 
a jailbroken device, anyway, one could just as well use one of the numerous 
terminal emulators now floating around for jailbroken iOS. That said, the idea 
of people writing Haskell on phones and iPads and so on makes me just a little 
bit grinny.

On Jun 18, 2011, at 2:17 PM, Alexander Solla wrote:

> 
> 
> On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
> To further emphasize, I'd like to type in (or paste in) Haskell code and
> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
> on the iPad.
> 
> Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now 
> supports cross-compilation, you can compile GHC for iOS.  I guess you could 
> cross compile Hugs with GCC.  Doing so probably isn't trivial, but it should 
> be straightforward.
> 
> I bet you could even use Xcode to make a graphical user interface to GHCi.
> ___
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Alexander Solla]

On Sat, Jun 18, 2011 at 10:46 AM, John Velman  wrote:
>
> To further emphasize, I'd like to type in (or paste in) Haskell code and
> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
> on the iPad.


Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now
supports cross-compilation, you can compile GHC for iOS.  I guess you could
cross compile Hugs with GCC.  Doing so probably isn't trivial, but it should
be straightforward.

I bet you could even use Xcode to make a graphical user interface to GHCi.
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[Don Stewart]

See also the cloud: http://tryhaskell.org

:-)

On Sat, Jun 18, 2011 at 1:46 PM, John Velman  wrote:

> Well, I'm not interested in a lisp interpreter written in Haskell.  Nor am
> I (at the moment) interested in writing an iPad app in Haskell.
>
> I changed the subject to clarify.
>
> What I would like to see is A Haskell Interpreter on the iPad.
>
> To further emphasize, I'd like to type in (or paste in) Haskell code and
> have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
> on the iPad.
>
> By the way, there are three Scheme interpreters in the iPad app store.  In
> addition to the two I previously mentioned, there is iScheme.
>
> - John Velman
>
>
>
> On Sat, Jun 18, 2011 at 12:43:45PM -0400, Don Stewart wrote:
> > See e.g.
> >
> > http://www.haskell.org/haskellwiki/IPhone
> >
> > 
> > https://github.com/dpp/LispHaskellIPad
> >
> > 
> >
> > On Sat, Jun 18, 2011 at 12:18 PM, John Velman  wrote:
> >
> > >
> > > There are (at least) two Scheme interpreters for iPad at the iTunes
> store:
> > > PixieScheme and GambitREPL.  Both allow entry of scripts, by typing or
> > > pasting.  The Gambit community is very busy trying to expand the
> usefulness
> > > of their interpreter.  Both have pretty good interfaces.
> > >
> > > There is also an Ocaml app, but I don't know or want to know Ocaml, and
> the
> > > interface looks very unfriendly.
> > >
> > > I'd really like to have something like this in Haskell, in the
> "education"
> > > pot, as is the GambitREPL.  Hugs is written in C, if I recall
> correctly.
> > > Would it be possible to compile Hugs for the iPad processor, taking out
> > > enough system calls to make it acceptable?
> > >
> > > John Velman
> > >
> > > ___
> > > Haskell-Cafe mailing list
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> > > http://www.haskell.org/mailman/listinfo/haskell-cafe
> > >
>
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Re: [Haskell-cafe] Haskell *interpreter* on iPad? (Scheme and Ocaml are there)

[John Velman]

Well, I'm not interested in a lisp interpreter written in Haskell.  Nor am
I (at the moment) interested in writing an iPad app in Haskell.

I changed the subject to clarify.

What I would like to see is A Haskell Interpreter on the iPad.  

To further emphasize, I'd like to type in (or paste in) Haskell code and
have it executed on the iPad.  To reiterate:  Something like Hugs, or ghci
on the iPad.

By the way, there are three Scheme interpreters in the iPad app store.  In
addition to the two I previously mentioned, there is iScheme.

- John Velman



On Sat, Jun 18, 2011 at 12:43:45PM -0400, Don Stewart wrote:
> See e.g.
> 
> http://www.haskell.org/haskellwiki/IPhone
> 
> 
> https://github.com/dpp/LispHaskellIPad
> 
> 
> 
> On Sat, Jun 18, 2011 at 12:18 PM, John Velman  wrote:
> 
> >
> > There are (at least) two Scheme interpreters for iPad at the iTunes store:
> > PixieScheme and GambitREPL.  Both allow entry of scripts, by typing or
> > pasting.  The Gambit community is very busy trying to expand the usefulness
> > of their interpreter.  Both have pretty good interfaces.
> >
> > There is also an Ocaml app, but I don't know or want to know Ocaml, and the
> > interface looks very unfriendly.
> >
> > I'd really like to have something like this in Haskell, in the "education"
> > pot, as is the GambitREPL.  Hugs is written in C, if I recall correctly.
> > Would it be possible to compile Hugs for the iPad processor, taking out
> > enough system calls to make it acceptable?
> >
> > John Velman
> >
> > ___
> > Haskell-Cafe mailing list
> > Haskell-Cafe@haskell.org
> > http://www.haskell.org/mailman/listinfo/haskell-cafe
> >

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