Survey: what new bit of syntax would you like in base #RStats?

What should the following bits of syntax do?

* ===
* ++ And --
* +=
* //
* ?
* {{ }}
* [[[ ]]]
* <<==
* (?: X)

@coolbutuseless

* === as identical() (vectorized over list() elements, please!)

* // as integer division (like the complement of %%

* ? as a FALSE-coalescing infix operator à la `%||%`

* [[[ ]]] as a defensive version of `[[` that checks for "scalar (chr/int/etc.)" type

* (?: X) as syntactic sugar for quote()

* <<== as like <<- but assigns into ALL parent environments for maximum chaos

@yjunechoe snap!!!

I also want === to be vectorised 'identical()'