Do we expect the following syntax to work?

julia> [Int, Float64, String, Bool] .<: Union{Int, String}
ERROR: syntax: space not allowed after ":" used for quoting

It works if you call <: as a broadcasted function:

julia> (<:).([Int, Float64, String, Bool], Union{Int, String})
4-element BitArray{1}:
 1
 0
 1
 0

Version info:

Julia Versio

Can someone please convert the Chinese text in the readme to English.

Please note: the major language for all SciSharp projects is English. Translations of the documentation in other languages should only be second to English and in a separate subfolder.