FYI: New calendar project (uses C++14 and C++17).

[Ivan Čukić]

Hi Mark,

An alternative to Niebler's range-v3 and cppitertools you might want
to try is boost.range (it is a part of the default boost package, I
don't know whether it has everything you'd need for this).

I haven't seen where you used struct-bindings - the code compiles fine
with gcc -std=c++14.

Cool you've started playing with things like these :)

Cheers,
Ivan