Writing markdown from parsed representation

[winny-]

This might be beyond the scope of this library: is it possible to read in markdown, manipulate it, and write the modified markdown to file? I mainly want to do this to manage a long README.md with a table of contents, and lexically sorted subsections.

[greghendershott]

I think it's probably out of scope because:

I think it's not too difficult to write an xexpr->markdown function that uses match to recursively walk an x-expression and produce something.

Here's a small example of an xexpr->markdown that emits "lite" markdown (for use in HTML metadata, and intentionally eliminating block elements).

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If you wanted to make an xexpr->markdown that emits "full" markdown, and submit it as a PR, I'd consider taking it -- however I'd be nervous:

1. "Full" markdown likely means many corner cases.

2. People might expect exact round-tripping -- (check-equal? x (xexpr->markdown (parse-markdown x))) -- for all possible x, but I think that's impossible (or at least not practically worthwhile) to make true. (One simple example: Both _em_ and <em>em</em> are valid markdown and both will parse to (em () "em"). That direction is "lossy".)