Manditory code blocks

[johndcook]

Apparently a .lhs file must contain a code block, though it may be empty. The following file will process correctly, but lhs2TeX will hang if you remove the empty code block.

\documentclass{article} %include polycode.fmt \begin{document}

%options ghci \eval{2+2}

\begin{code} \end{code}

\end{document}

I'm using lhs2TeX version 1.8.1 and ghc 7.8.2 on Windows.

[kosmikus]

Using \eval requires the file itself to be accepted by ghci. An empty literate Haskell file currently is not. You get unlit: No definitions in file (perhaps you forgot the '>'s?). I would rather not special-case this. You can of course use a different literate preprocessor that is more tolerant, for example lhs2TeX itself, by saying

%options ghci -pgmL lhs2TeX -optL--pre

(but then again, this has other implications).

[johndcook]

Thanks.

On Tue, Jul 22, 2014 at 2:57 PM, Andres Löh notifications@github.com wrote:

Using \eval requires the file itself to be accepted by ghci. An empty literate Haskell file currently is not. You get unlit: No definitions in file (perhaps you forgot the '>'s?). I would rather not special-case this. You can of course use a different literate preprocessor that is more tolerant, for example lhs2TeX itself, by saying

%options ghci -pgmL lhs2TeX -optL--pre

(but then again, this has other implications).

— Reply to this email directly or view it on GitHub https://github.com/kosmikus/lhs2tex/issues/36#issuecomment-49792057.

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John D. Cook http://www.johndcook.com