Thank you for helping out again. It does work for $(map(esc, body)...), so it's probably a bug. I'll file an issue if no one comes up with something better.
On Monday, August 3, 2015 at 11:03:47 PM UTC-4, Yichao Yu wrote: > > On Mon, Aug 3, 2015 at 10:47 PM, Cedric St-Jean <cedric...@gmail.com > <javascript:>> wrote: > > I'm trying to write a macro that takes up a function definition and > outputs > > another one. It starts like: > > > > macro mac(fdef) > > @capture(fdef, begin function fname_ (args__) body__ end end) > > :(function $(esc(fname)) ($(args...)) > > ... end) > > end > > > > Macrotools are very convenient for getting the args, but I have issues > > putting them back into place. I thought it wouldn't matter if they were > > gensym'ed, but it turns out that arguments like (x::SomeType) will have > > SomeType resolved in the macro's environment, which is obviously wrong. > > > > So I need to escape hygiene. Something like $(esc(args)...), but that > does > > not work, as esc returns an Expr. I thought that $(map(esc, args)...) > could > > make sense, but it's complaining that: > > > > :($(Expr(:error, "\"(escape x)\" is not a valid function argument > name"))) > > > > Enter code here... > > Seems that escape is not accepted in function arguments. Possibly a bug... > > > > > which makes little sense to me. Any ideas? > > > > Cédric >
