Hi Billou, thanks for letting me know about the |> esc part! I'll make a new topic to cover the macro part of this post.
On Friday, June 6, 2014 5:33:38 PM UTC+8, Billou Bielour wrote: > > For the macro problem, note that arguments of macro are expressions, or > Symbols: > > Just as functions map a tuple of argument values to a return value, macros >> map a tuple of argument expressions to a returned expression. They allow >> the programmer to arbitrarily transform the written code to a resulting >> expression, which then takes the place of the macro call in the final >> syntax tree. >> > > macro test(x); dump(x); end > > @test var > Symbol var > > So you can do something like that: > > macro fetch(obj) > quote > local ic1eq = $obj.ic1eq > local ic2eq = $obj.ic2eq > end > end > > This will not work however, because of hygiene: > > macroexpand (:(@fetch var)) > > :(begin # /opt/mandelbrot/session-manager/src/Worker.jl, line 3: > local #174#ic1eq = var.ic1eq # line 4: > local #175#ic2eq = var.ic2eq > end) > > You just need to escape your quote block: > > macro fetch(obj) > quote > local ic1eq = $obj.ic1eq > local ic2eq = $obj.ic2eq > end |> esc > end > > You can also look here for a similar question: > > > https://groups.google.com/forum/#!searchin/julia-users/unpack/julia-users/IQS2mT1ITwU/gEyj6JNJsuAJ > >
