Re: [racket-users] racket users fight for their right to colon keywords

Greg Hendershott wrote on 10/24/2015 10:43 AM: p.s. If people read that (even just section 7.7), and there's still a debate? Then probably the only resolution would be a compromise that leaves everyone equally unhappy. Like say :#:keyword:#: ;) I linked the paper on Oct 15, though it got lost

Re: [racket-users] racket users fight for their right to colon keywords

On Fri, Oct 23, 2015 at 2:58 PM, Anthony Carrico wrote: > but seriously Asumu mentioned > Flatt and Barzilay's "Keyword and optional arguments in PLT Scheme" on > irc last night: > http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.162.17 > The paper illuminates the

Re: [racket-users] Probabilities in log-space and rounding errors

I guess one should just try to use log1p instead of log(1+x), but I'm not sure how lg+ could be defined with log1p. Note also that lg1+ is defined in terms of log1p (by first exponentiating x). On Thu, Oct 22, 2015 at 1:41 PM, Alex Knauth wrote: > lg+ and lg- are defined

Re: [racket-users] Getting the "require" syntax arrows to work right

Aha, yes, that seems to work. I should have thought of that, but I actually didn’t know you can just copy all properties over with datum->syntax, haha. I guess I should have read the docs for that more carefully. This does seem a little bit like cheating because now the macro-generated

Re: [racket-users] Getting the "require" syntax arrows to work right

I'm not sure syntax-original? is really that meaningful anymore. Another way to forge it is to use read-syntax with a string port that has whatever you want (during a macro expansion call). And check syntax even accepts an alternative property for those times when these two approaches aren't

Re: [racket-users] Getting the "require" syntax arrows to work right

Maybe you need to copy over the properties too? This seems to work: #lang racket/base (require (for-syntax racket/base)) (define-syntax (import stx) (syntax-case stx () [(_ (a b)) #`(require #,(datum->syntax stx (string->symbol (format "~a/~a" (syntax-e

[racket-users] Getting the "require" syntax arrows to work right

I’ve been toying with the idea of making an R7RS implementation in Racket, and one of the things I’ve implemented is the R7RS `import` form. It’s very easy to implement in Racket, and it works fine as far as I can tell, but I can’t figure out how to get the special binding arrows to cooperate