Only implements the different conversion types from and to ints for now.
Unfortunately very reliant on builtins.{floor,ceil} which can't be
implemented purely except very inefficiently (to my knowledge), so it
only really works for C++ Nix >= 2.4. Tests are thus skipped for
C++ Nix 2.3.
Change-Id: Idcb1a11df11e214cdba3f2a0715472b370daa7dc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9008
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
We omit type checks for performance reasons in most places currently, so
the library grouping is important in showing people what to use for what
sort of input. The moved functions make sense to use with floats as
well, so we'll move them to the num library. Some of the remaining
functions could theoretically be adapted and moved, but aren't for now.
Change-Id: Ifdecaa60be594f4438b2a58b9ea6445e2da080e3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9007
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
