requires

gistfile1.txt

~/Documents/julia  master  j6                                                                                                       ✓  19:55:43 
               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.6.1-pre.unknown (2017-10-07 01:18 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 389b23c* (3 days old release-0.6)
|__/                   |  x86_64-redhat-linux

julia> module Foo
       using Requires
       @show @macroexpand @init println("init")
       @init println("init")
       end
@macroexpand(@init(println("init"))) = quote  # /home/basti/.julia/v0.6/Requires/src/init.jl, line 16:
    begin  # /home/basti/.julia/v0.6/Requires/src/init.jl, line 5:
        if !((Requires.isdefined)(:__inits__)) # /home/basti/.julia/v0.6/Requires/src/init.jl, line 6:
            const __inits__ = (Requires.Function)[]
        end # /home/basti/.julia/v0.6/Requires/src/init.jl, line 8:
        if !((Requires.isdefined)(:__init__)) # /home/basti/.julia/v0.6/Requires/src/init.jl, line 9:
            __init__() = begin  # /home/basti/.julia/v0.6/Requires/src/init.jl, line 9:
                    for f = __inits__ # /home/basti/.julia/v0.6/Requires/src/init.jl, line 24:
                        f()
                    end
                end
        end
    end # /home/basti/.julia/v0.6/Requires/src/init.jl, line 17:
    (Requires.push!)(__inits__, (()->begin  # /home/basti/.julia/v0.6/Requires/src/init.jl, line 17:
                println("init")
            end)) # /home/basti/.julia/v0.6/Requires/src/init.jl, line 18:
    Requires.nothing
end
init
Foo

---------------------------------------------------------- vs ---------------------------------------------------------

 ~/Documents/julia  master  julia --depwarn=no                                                    ✓  19:55:19 
               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.7.0-DEV.2097 (2017-10-10 05:01 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit c61aa27 (0 days old master)
|__/                   |  x86_64-redhat-linux

julia> module Foo
       using Requires
       @show @macroexpand @init println("init")
       @init println("init")
       end
#= REPL[1]:3 =# @macroexpand(#= REPL[1]:3 =# @init(println("init"))) = quote
    #= /home/basti/.julia/v0.7/Requires/src/init.jl:16 =#
    begin
        #= /home/basti/.julia/v0.7/Requires/src/init.jl:5 =#
        if !((Requires.isdefined)(:__inits__))
            #= /home/basti/.julia/v0.7/Requires/src/init.jl:6 =#
            const Requires.__inits__ = (Requires.Function)[]
        end
        #= /home/basti/.julia/v0.7/Requires/src/init.jl:8 =#
        if !((Requires.isdefined)(:__init__))
            #= /home/basti/.julia/v0.7/Requires/src/init.jl:9 =#
            (Requires.__init__)() = begin
                    #= /home/basti/.julia/v0.7/Requires/src/init.jl:9 =#
                    for #2#f = Requires.__inits__
                        #= /home/basti/.julia/v0.7/Requires/src/init.jl:24 =#
                        #2#f()
                    end
                end
        end
    end
    #= /home/basti/.julia/v0.7/Requires/src/init.jl:17 =#
    (Requires.push!)(__inits__, (()->begin
                #= /home/basti/.julia/v0.7/Requires/src/init.jl:17 =#
                println("init")
            end))
    #= /home/basti/.julia/v0.7/Requires/src/init.jl:18 =#
    Requires.nothing
end
ERROR: UndefVarError: __inits__ not defined