Parsing String to Dates.CompoundPeriod

General Usage
7

hmm… interesting. I would also have thought it is implemented, given +, and - are already implemented.

Well, here is my attempt, using differences.

function duration_gt(x::Dates.CompoundPeriod, y::Dates.CompoundPeriod)
    d = y-x
    # probably bad assumption that the first period is always 
    # the lower time resolution and canonicalized?
    first(d.periods).value < 0 
end
duration_gt(x::Dates.CompoundPeriod, y::Dates.Period) = duration_gt(x,Dates.CompoundPeriod(y))
duration_gt(x::Dates.Period, y::Dates.CompoundPeriod) = duration_gt(Dates.CompoundPeriod(x),y)
duration_gt(x::Dates.Period, y::Dates.Period) = duration_gt(Dates.CompoundPeriod(x),Dates.CompoundPeriod(y))

Some quick test cases:

julia> W1D1 = Week(1)+Day(1)
1 week, 1 day

julia> S2 = Second(2)
2 seconds

julia> MS300 = Microsecond(300)
300 microseconds

julia> duration_gt(W1D1,S2)
true

julia> duration_gt(S2,W1D1)
false

julia> duration_gt(S2,MS300)
true

julia> duration_gt(MS300,S2)
false

I think it is not implemented, because Year and Month are not fixed duration, it doesn’t work with CompoundPeriond with Month or Year in it.