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Failed to run the flapjax compiler on my machine
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Wei Hu  
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 More options May 12, 3:28 am
From: Wei Hu <wei....@gmail.com>
Date: Tue, 12 May 2009 00:28:46 -0700 (PDT)
Local: Tues, May 12 2009 3:28 am
Subject: Failed to run the flapjax compiler on my machine
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I tried to run fxc on the Catch Up demo, and got this error:

fxc: src/Flapjax/HtmlEmbedding.hs:25:9-22: No instance nor default
method for class operation BrownPLT.Html.Syntax.prettyPrintScript

What's going wrong here? Thanks.


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Wei Hu  
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 More options May 12, 3:32 am
From: Wei Hu <wei....@gmail.com>
Date: Tue, 12 May 2009 00:32:30 -0700 (PDT)
Local: Tues, May 12 2009 3:32 am
Subject: Re: Failed to run the flapjax compiler on my machine
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Did I use the wrong version of WebBits library?

On May 12, 3:28 am, Wei Hu <wei....@gmail.com> wrote:


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Artyom Shalkhakov  
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 More options May 12, 5:38 am
From: Artyom Shalkhakov <artyom.shalkha...@gmail.com>
Date: Tue, 12 May 2009 15:38:06 +0600
Local: Tues, May 12 2009 5:38 am
Subject: Re: [Flapjax: 405] Failed to run the flapjax compiler on my machine
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Hi

2009/5/12 Wei Hu <wei....@gmail.com>:

> I tried to run fxc on the Catch Up demo, and got this error:

> fxc: src/Flapjax/HtmlEmbedding.hs:25:9-22: No instance nor default
> method for class operation BrownPLT.Html.Syntax.prettyPrintScript

It looks like a compile-time error. What compiler and environment do
you use?

You can use the lovely "cabal install" command to spare yourself the
effort; works flawlessly fine here on Arch.

Cheers,
Artyom Shalkhakov.


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Wei Hu  
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 More options May 12, 11:01 am
From: Wei Hu <wei....@gmail.com>
Date: Tue, 12 May 2009 08:01:40 -0700 (PDT)
Local: Tues, May 12 2009 11:01 am
Subject: Re: Failed to run the flapjax compiler on my machine
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On May 12, 5:38 am, Artyom Shalkhakov <artyom.shalkha...@gmail.com>
wrote:

I'm using ghc-6.10.1 on Debian. I did mean to "cabal install" flapjax,
but it's not on Hackage yet. So what I did was git clone flapjax, cd
compiler, and ran "cabal install" from that directory. There was a
warning while compiling Flapjax.HtmlEmbedding:

src/Flapjax/HtmlEmbedding.hs:25:9:
    Warning: No explicit method nor default method for
`BrownPLT.Html.Syntax.prettyPrintScript'
    In the instance declaration for `Script Flapjax'

I'm wondering if I ran fxc the wrong way. "fxc --help" didn't give
much helpful information.


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Artyom Shalkhakov  
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 More options May 12, 12:58 pm
From: Artyom Shalkhakov <artyom.shalkha...@gmail.com>
Date: Tue, 12 May 2009 22:58:07 +0600
Local: Tues, May 12 2009 12:58 pm
Subject: Re: [Flapjax: 408] Re: Failed to run the flapjax compiler on my machine
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2009/5/12 Wei Hu <wei....@gmail.com>:

> I'm using ghc-6.10.1 on Debian. I did mean to "cabal install" flapjax,
> but it's not on Hackage yet.

Oops, I meant WebBits when I said about Flapjax compiler, sorry.

> So what I did was git clone flapjax, cd
> compiler, and ran "cabal install" from that directory. There was a
> warning while compiling Flapjax.HtmlEmbedding:

> src/Flapjax/HtmlEmbedding.hs:25:9:
>    Warning: No explicit method nor default method for
> `BrownPLT.Html.Syntax.prettyPrintScript'
>    In the instance declaration for `Script Flapjax'

This warning says what it says. :) I suppose there's nothing wrong
with unimplemented class method if it's not used anywhere (which
seems to be the case).

Cheers,
Artyom Shalkhakov.


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Wei Hu  
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 More options May 12, 1:01 pm
From: Wei Hu <wei....@gmail.com>
Date: Tue, 12 May 2009 10:01:49 -0700 (PDT)
Local: Tues, May 12 2009 1:01 pm
Subject: Re: Failed to run the flapjax compiler on my machine
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Then why am I running into this error at run-time?

On May 12, 12:58 pm, Artyom Shalkhakov <artyom.shalkha...@gmail.com>
wrote:


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Arjun Guha  
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 More options May 12, 1:10 pm
From: Arjun Guha <arjun.g...@gmail.com>
Date: Tue, 12 May 2009 13:10:15 -0400
Local: Tues, May 12 2009 1:10 pm
Subject: Re: [Flapjax: 410] Re: Failed to run the flapjax compiler on my machine
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That is definitely a compile-time warning.  My runtime messages are
not nearly as descriptive.

While WebBits is on Hackage, the Flapjax compiler itself is not.  I
suppose I might as well put it on Hackage.

Arjun


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Arjun Guha  
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 More options May 12, 1:20 pm
From: Arjun Guha <arjun.g...@gmail.com>
Date: Tue, 12 May 2009 13:20:45 -0400
Local: Tues, May 12 2009 1:20 pm
Subject: Re: [Flapjax: 410] Re: Failed to run the flapjax compiler on my machine
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Since you're using Debian, this is probably the easiest way to use the compiler:

http://www.cs.brown.edu/~arjun/tmp/fxc_2.0_i386.deb

It installs to /usr/local.

Let me know how it goes.

Arjun


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Wei Hu  
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 More options May 12, 1:37 pm
From: Wei Hu <wei....@gmail.com>
Date: Tue, 12 May 2009 10:37:02 -0700 (PDT)
Local: Tues, May 12 2009 1:37 pm
Subject: Re: Failed to run the flapjax compiler on my machine
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I meant that was an error when *running* the fxc compiler to *compile*
a .fx file.

I'm new to flapjax, so it could well be that I didn't give fxc the
right command options, or that fxc was looking for some files but
failed.

I simply copy-pasted the Catch Up demo into a .fx file, and ran fxc on
it, which gave this error:

fxc: src/Flapjax/HtmlEmbedding.hs:25:9-22: No instance nor default
method for class operation BrownPLT.Html.Syntax.prettyPrintScript

On May 12, 1:10 pm, Arjun Guha <arjun.g...@gmail.com> wrote:


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Arjun Guha  
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 More options May 12, 9:21 pm
From: Arjun Guha <arjun.g...@gmail.com>
Date: Tue, 12 May 2009 21:21:37 -0400
Local: Tues, May 12 2009 9:21 pm
Subject: Re: [Flapjax: 413] Re: Failed to run the flapjax compiler on my machine
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You're right. That's a bug I introduced during some overly aggressive
re-factoring.  Lesson learnt: don't re-factor.

I've pushed an update to github.  If you pull and recompile, it should
work just fine.

Arjun


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