On Mon, Aug 3, 2015 at 10:47 PM, Cedric St-Jean <[email protected]> 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
