Currently, `read-language` does return #f when `get-info` is not available. I'm not sure anymore whether that was intended, but since it has worked that way for a while, and since the intent of `read-language` is to report the `get-info` function, then I think the way forward here is to fix the documentation.
It sounds like DrRacket is handling a `#f` result ok: it should only support syntax coloring if a language specifies a 'color-lexer configuration via `get-info`, and so if `get-info` is not provided, then no 'color-lexer configuration is available. Or is `get-info` provided and somehow not recognized? At Sun, 20 Jul 2014 18:50:06 -0500, Robby Findler wrote: > It appears that read-language can return #f and what DrRacket does in > that case appears to be what you're seeing. Is that what you're > getting? > > The docs say that read-language never returns #f (presumably it is > allowed to return #f when fail-thunk returns #f, but the relevant > fail-thunk here doesn't return #f) so I'm not sure if that's a docs > bug, in which case I should change drracket to cope with it or an > implementation bug. > > But if I create a pollen directory, use 'rack pkg --link pollen' to > set it up and then put main.rkt with this content: > > #lang racket/base > (module reader racket/base (provide read-syntax) > (define (read-syntax a b) > #'(module m racket/base))) > > then I see this: > > $ racket > Welcome to Racket v6.1.0.3. > > (read-language (open-input-string "#lang pollen")) > #f > > > Robby > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
