Literate Haskell code and testing functions

Literate Haskell code and testing functions

[Shakthi Kannan]

Hi,

Consider the literate Haskell (line numbers mentioned only for
reference) in markdown text:

=== TEXT ===

1. A list 'a' is defined as a set with five integers, 1 to 5.
2.
3. > a :: [Int]
4. > a = [1, 2, 3, 4, 5]
5.
6. > -- The contents of a are:
7. > *Test> putStrLn "Contents of a:"
8. > *Test> a
9.
=== END ===

I want to be able to load the above text in GHCi, and be able to
execute the commands mentioned in "*Test>".

But, when generating the pandoc output document, I want only lines
1..5, without the testing code in "*Test>".  Is this possible?

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com

Re: Literate Haskell code and testing functions

[Ivan Lazar Miljenovic]

On 28 June 2014 14:12, Shakthi Kannan <shakthimaan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Hi,
>
> Consider the literate Haskell (line numbers mentioned only for
> reference) in markdown text:
>
> === TEXT ===
>
> 1. A list 'a' is defined as a set with five integers, 1 to 5.
> 2.
> 3. > a :: [Int]
> 4. > a = [1, 2, 3, 4, 5]
> 5.
> 6. > -- The contents of a are:
> 7. > *Test> putStrLn "Contents of a:"
> 8. > *Test> a
> 9.
> === END ===
>
> I want to be able to load the above text in GHCi, and be able to
> execute the commands mentioned in "*Test>".
>
> But, when generating the pandoc output document, I want only lines
> 1..5, without the testing code in "*Test>".  Is this possible?
>
> SK

If you're not generating LaTeX, maybe wrap it in \begin{code} ...
\end{code} or something?

(Or if you are generating LaTeX, wrap it in an HTML comment.)

>
> --
> Shakthi Kannan
> http://www.shakthimaan.com
>
> --
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-- 
Ivan Lazar Miljenovic
Ivan.Miljenovic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
http://IvanMiljenovic.wordpress.com

Re: Literate Haskell code and testing functions

[Shakthi Kannan]

Hi,

--- On Sat, Jun 28, 2014 at 9:59 AM, Ivan Lazar Miljenovic
<ivan.miljenovic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
| If you're not generating LaTeX, maybe wrap it in \begin{code} ...
| \end{code} or something?
\--

You mean only for the test code, as in:

=== Input.lhs ===
A list 'a' is defined as a set with five integers, 1 to 5.

> a :: [Int]
> a = [1, 2, 3, 4, 5]

\begin{latex}

> a

\end{latex}
=== END ===

The above fails to load:

=== OUTPUT ===

$ ghci foo.lhs
GHCi, version 7.6.3: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main             ( Input.lhs, interpreted )

Input.lhs:8:3: Parse error: naked expression at top level
Failed, modules loaded: none.

=== END ===

I am actually generating PDF, but, would like to test the code in GHCi.

Thanks for your reply.

SK

-- 
Shakthi Kannan
http://www.shakthimaan.com

Re: Literate Haskell code and testing functions

[Ivan Lazar Miljenovic]

Oh, you want ghci to automatically execute some lines?  I don't think
you can, sorry.

In this sense, Haskell isn't a scripting language like bash, python,
etc. where you can just add arbitrary lines to the end and have them
run when the file is loaded by the interpreter.

On 28 June 2014 15:02, Shakthi Kannan <shakthimaan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Hi,
>
> --- On Sat, Jun 28, 2014 at 9:59 AM, Ivan Lazar Miljenovic
> <ivan.miljenovic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> | If you're not generating LaTeX, maybe wrap it in \begin{code} ...
> | \end{code} or something?
> \--
>
> You mean only for the test code, as in:
>
> === Input.lhs ===
> A list 'a' is defined as a set with five integers, 1 to 5.
>
>> a :: [Int]
>> a = [1, 2, 3, 4, 5]
>
> \begin{latex}
>
>> a
>
> \end{latex}
> === END ===
>
> The above fails to load:
>
> === OUTPUT ===
>
> $ ghci foo.lhs
> GHCi, version 7.6.3: http://www.haskell.org/ghc/  :? for help
> Loading package ghc-prim ... linking ... done.
> Loading package integer-gmp ... linking ... done.
> Loading package base ... linking ... done.
> [1 of 1] Compiling Main             ( Input.lhs, interpreted )
>
> Input.lhs:8:3: Parse error: naked expression at top level
> Failed, modules loaded: none.
>
> === END ===
>
> I am actually generating PDF, but, would like to test the code in GHCi.
>
> Thanks for your reply.
>
> SK
>
> --
> Shakthi Kannan
> http://www.shakthimaan.com
>
> --
> You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
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> For more options, visit https://groups.google.com/d/optout.



-- 
Ivan Lazar Miljenovic
Ivan.Miljenovic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
http://IvanMiljenovic.wordpress.com