I've Seen the Future...
Ali Rantakari has taken the PEG from peg-markdown and used it to build a syntax highlighter. Said highlighter is compatible with Cocoa apps.
Which means that it is possible to build a MMD text editor with built in highlighting, using essentially the same PEG built into peg-markdown.
I have built a very rough Cocoa app that uses this highlighter for a document based app. So basically, you can edit plain text files on your mac, and see them highlighted in a way that correlates to the Markdown syntax.
This app is not finished. It’s just a proof of concept. It uses the peg-markdown PEG, not the MMD 3 PEG, so it doesn’t get MMD extensions to the Markdown syntax.
But it basically works!
I hope that this concept can be used to build some really amazing applications!
PS> The code can be used to create qt and gtk2 apps as well, but don’t ask me to figure that out…