Add custom chain method

New to Julia
5

You are probably right. I don’t know enough about ::Colon and parser restrictions (.. could clash with the broadcast operator . somehow?), but the following variations seem to work

(&)(pre::Union{String,Ci},next_::String)=return Ci(pre,next_)
    
@show "a"&"b"
@show "a"&"b"&"c"        

(..)(x::Vararg{String})=begin
    pre=x[1]
    for next_ in x[2:end]
        pre=Ci(pre,next_)
    end
    return pre
end

@show ..("a","b")
@show ..("a","b","c")

yielding

"a" & "b" = Ci("a", "b")
("a" & "b") & "c" = Ci(Ci("a", "b"), "c")
"a" .. "b" = Ci("a", "b")
..("a", "b", "c") = Ci(Ci("a", "b"), "c")
Ci(Ci("a", "b"), "c")

Edit: switching the operators doesn’t work in both cases…

(..)(pre::Union{String,Ci},next_::String)=return Ci(pre,next_)
    
@show "a".."b"
@show "a".."b".."c"

fails with

ERROR: syntax: ".." is not a unary operator

and

(&)(x::Vararg{String})=begin
    pre=x[1]
    for next_ in x[2:end]
        pre=Ci(pre,next_)
    end
    return pre
end

@show "a"&"b"
@show "a"&"b"&"c"

fails with

ERROR: MethodError: no method matching &(::Ci, ::String)
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