On Wed, Apr 20, 2016 at 2:54 PM, Yichao Yu <yyc1...@gmail.com> wrote: > On Wed, Apr 20, 2016 at 2:33 PM, Didier Verna <did...@didierverna.net> wrote: >> I wrote: >> >>> Could someone explain what's hygienic about Julia's macros? Because I >>> cannot figure out an example by myself... >> >> OK, I think I get it: >> >> julia> macro finish() >> t = 5 >> end >> >> julia> function foo() >> t = 10 >> @finish() >> t >> end >> foo (generic function with 1 method) >> >> julia> foo() >> 10 >> >> >> Still, it seems to me extremely abusive to call this macro system >> hygienic... > > There's https://github.com/JuliaLang/julia/issues/14893 > Your macro is also simply returning a `5` btw.
Just to be clear, the behavior you observer is correct and expected. Non-escaped variables used in macro is not supposed to affect the user of the macro. The bug report I pasted is merely a FYI since you are getting very closed to discover it. > >> >> -- >> ELS'16 registration open! http://www.european-lisp-symposium.org >> >> Lisp, Jazz, Aïkido: http://www.didierverna.info
