> > I'm emitting code in which I want to prettyprint the contents > > of a Cmm Block as a comment, by which I mean putting `--` to the left > > of *each* line of the rendered Cmm Block. Using GHC.Utils.Outputable, > > is this even possible? How would I tackle it? (The Haddock page > > does not suggest any obvious combinators.) > > > It's not easy. One (rather horrible) approach would be to render the > document to a string, split the output into lines and add the comment > symbols, and then splice the result into another document.
I'd be willing to go there, except I don't know how I would guess the width of the string I'm hoping to render to. Maybe it wouldn't matter. > Perhaps you could rather use block comment syntax? This would be > much easier. Alas, one goal is to make the comment very obvious to the human reader. Some prettyprinters can be jiggered to insert a specified string at every line break. But I gather SDoc is not one of those. *Sadness* N _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
