This package allows you to specify required keyword arguments, as suggusted in JuliaLang/julia#5111.
As of Julia version 0.7.0, this functionality is built in. From this version forward, the @required_keywords macro won't do anything.
julia> using RequiredKeywords
julia> @required_keywords f(x; y::Int64) = x*y
f (generic function with 1 method)
julia> f(2,y=2)
4
julia> f(2)
ERROR: Unassigned Keyword: Required keyword y::Int64 not included.
Stacktrace:
[1] f(::Int64) at ./REPL[5]:1