Definition of tail2

[cossio]

TupleTools.jl/src/TupleTools.jl

Line 37 in ad34513

@inline tail2(t::Tuple{Any,Any,Vararg{Any}}) = argtail2(t...)

Can someone explain why tail2 is defined in such a complicated way?

Why not just tail2(t::Tuple) = tail(tail(t))?

[Jutho]

I don't remember; I just copied how Base implements tail.

[cossio]

ok. Just wondering if there was deep reason.

[Jutho]

Not sure if both would generate the same machine code; that's easy to check.

[Jutho]

Just checked, and tail(tail(t)) generates the same machine code as tail2(t). Maybe the simpler implementation is indeed less confusing.

In general, I have recently used TupleTools a bit less, due to the good broadcasting support of tuples.