rust/library/core
Julian Frimmel 60a9d5a5a9 Re-enable copy[_nonoverlapping]() runtime checks
This commit re-enables the debug checks for valid usages of the two
functions `copy()` and `copy_nonoverlapping()`. Those checks were com-
mented out in #79684 in order to make the functions const. All that's
been left was a FIXME, that could not be resolved until there is was way
to only do the checks at runtime.
Since #89247 there is such a way: `const_eval_select()`. This commit
uses that new intrinsic in order to either do nothing (at compile time)
or to do the old checks (at runtime).

The change itself is rather small: in order to make the checks usable
with `const_eval_select`, they are moved into a local function (one for
`copy` and one for `copy_nonoverlapping` to keep symmetry).

The change does not break referential transparency, as there is nothing
you can do at compile time, which you cannot do on runtime without get-
ting undefined behavior. The CTFE-engine won't allow missuses. The other
way round is also fine.
2021-11-09 10:02:09 +01:00
..
benches Auto merge of #88788 - falk-hueffner:speedup-int-log10-branchless, r=joshtriplett 2021-10-12 03:18:54 +00:00
primitive_docs Add primitive documentation to libcore 2021-09-12 02:23:08 +00:00
src Re-enable copy[_nonoverlapping]() runtime checks 2021-11-09 10:02:09 +01:00
tests Rollup merge of #89951 - ojeda:stable-unwrap_unchecked, r=dtolnay 2021-10-31 09:20:27 +01:00
Cargo.toml rfc3052: Remove authors field from Cargo manifests 2021-07-29 14:56:05 -07:00