Thanks, John, for both your replies.
Sam
On Friday, 4 August 2017 16:04:08 UTC+1, John MacFarlane wrote:
I'd say the obvious thing to do is to create a program
preprocesses the C source file, converting it into a
Markdown document that you can pipe through pandoc.
Or write a standalone tool in Haskell, using pandoc
as a library. (And language-c to parse the source
code.)
+++ Sam Liddicott [Aug 04 17 07:43 ]:
> I use pandoc in my C source files.
> C comments contain pandoc markup, or perhaps special C comments like
> this /*:pandoc
> and the pandoc ends when the C comment ends.
> Combined with goat (to convert ascii diagrams to SVG) this is a great
> way to document code.
> The difficulty in doing this now is convincing pandoc that code outside
> of comments is a fenced code block, and that the start end end comment
> markers shouldn't be rendered.
> For instance:
> ---8<------8<------8<------8<------8<------8<------8<---
> /**
> It's a shame that pandoc renders the leading /*
> and now here is some code but it the comment markers sadly render:
> ~~~C
> */
> int x() {
> blag();
> }; /*
> ~~~
> etc.
> */
> ---8<------8<------8<------8<------8<------8<------8<---
> This feature can't be implemented using the filters, because if pandoc
> treats the C source as pandoc markup, the start-comment might be
> halfway through an AST node that never should be there.
> I think that it needs parser support; but it isn't a new input format
> either, as other variants of markdown might be used internally.
> Ideally, this requires a new parsing mode to assume a fenced-code-block
> interspersed with other pandoc markup.
> i think the method is:
> based on the file extension or a runtime argument, set the default
> fenced code block type, and the comment start and end sequences.
> 1. If, (after skipping initial white space), the first text is not a
> comment-start-sequence, then the fence-code block is assumed before the
> white space, and all the input is inserted into that fenced code block
> in the AST until end-of-file or a comment-start-sequence.
> 2. At a comment-start-sequence, the sequence is thrown away and the
> parse acts as if a fenced-code-block-end was read.
> 3. Parsing continues as normal until a comment-end-sequence is read.
> This sequence is thrown away and the parser repeats from 1.
> Now maybe the start-comment-sequence is always followed by a magic
> header like :pandoc and maybe by further attributes which ought to be
> applies to the previous fenced code block, and maybe the
> end-comment-sequence could have attributes to apply to the upcoming
> fenced-code-block. Maybe as a way to say: skip this code block until
> you next see a pandoc comment, don't even bother to emit it. Not all
> code wants to be part of the documentation, after all.
> Maybe this would be better suited to an awk script to run manually and
> not be part of pandoc at all. I'm using this sed, which does the job
> somewhat.
> sed -e '1!s/^\/\* */~~~\n\n/;/\/\*/!s/\*\/$/\n\n~~~C/' | pandoc --toc
> -s -S -o doc.html
> What are others thoughts on this?
> Sam
>
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