Greets, On Wed 18 Aug 2010 14:35, Ian Hulin <i...@hulin.org.uk> writes:
> On 18/08/10 15:03, Ludovic Courtès wrote: >> Ian Hulin <i...@hulin.org.uk> writes: >>> Also what are the args the REPL says you can supply to (make-module) ?. > It looks like there are three optional parameters, and the code is > trying to do a home-grown version of (ice-9 optargs) [...] In git, the definition begins: (define* (make-module #:optional (size 31) (uses '()) (binder #f)) ...) > As the lilypond C++ routine immediately adds stuff to the uses list it > could be useful to call make-module with this parameter. > However, how do you call the thing while getting it to accept that you > don't want to pass it the first parameter and want to let it default the > value, but the first positional one you are passing is actually the > second actual one, as you don't have any list separators in Scheme like > in C++, or Pascal or whatever. So Scheme cannot distinguish between > (make-module ( my-obarray-size)) and (make-module ( my-uses-list)) > whereas a language with list-element separators could make this clear > make-module ( my_obbaray_size, , ); > and make-module ( , my_uses_list , ); You use #:key instead of #:optional arguments. make-module needs to be declared to have #:key arguments, though, which is not currently the case. Andy -- http://wingolog.org/
