It's documented under "Hygiene for variables" here http://elixir-lang.org/docs/stable/elixir/Kernel.SpecialForms.html#quote/2.
The reasoning for this behaviour is that variables from different contexts shouldn't leak into each others contexts without making it explicit with `var!`. Your code doesn't work because `args` is used in a different context than where it was defined. On Wed, Jul 27, 2016 at 3:28 PM, Jiafeng Cao <funfriend...@gmail.com> wrote: > Hi, I've been reading through about macros, and came across the `var!`. I > thought I got the idea of it until I wrote some code like this gist > <https://gist.github.com/lerencao/9a271ba31b6771f4563f645fae9b9815>. > I know I can use `def unquote(name)(var!(args)), do: ...` to make it work. > I just cannot get it. > What's I missing here? Many thanks. > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elixir-lang-talk+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elixir-lang-talk/09af6955-28e3-4a14-8851-0bfa201dc760%40googlegroups.com > <https://groups.google.com/d/msgid/elixir-lang-talk/09af6955-28e3-4a14-8851-0bfa201dc760%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Eric Meadows-Jönsson -- You received this message because you are subscribed to the Google Groups "elixir-lang-talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to elixir-lang-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-talk/CAM_eapj1NoarMycJtQ%2BfvXGpi_27xsx%3D43hvj_ZogrDaqOWA4A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
