8 commits

Author	SHA1	Message	Date
The8472	e0d70153cd	Add comments around code where ordering is important due for panic-safety ... Iterators contain arbitrary code which may panic. Unsafe code has to be careful to do its state updates at the right point between calls that may panic.	2021-06-22 19:06:55 +02:00
The8472	f72c60a39a	Revert "Auto merge of #83770 - the8472:tra-extend, r=Mark-Simulacrum" ... Due to a performance regression that didn't show up in the original perf run this reverts commit 9111b8ae97, reversing changes made to 9a700d2947.	2021-05-27 18:17:09 +02:00
bors	9111b8ae97	Auto merge of #83770 - the8472:tra-extend, r=Mark-Simulacrum ... Add `TrustedRandomAccess` specialization for `Vec::extend()` This should do roughly the same as the `TrustedLen` specialization but result in less IR by using `__iterator_get_unchecked` instead of `Iterator::for_each` Conflicting specializations are manually prioritized by grouping them under yet another helper trait.	2021-05-26 19:22:31 +00:00
Ivan Tham	eeac70c567	Merge same condition branch in vec spec_extend	2021-04-15 11:58:02 +08:00
The8472	020287516b	add TrustedRandomAccess specialization to vec::extend ... This should do roughly the same as the TrustedLen specialization but result in less IR by using __iterator_get_unchecked instead of iterator.for_each.	2021-04-08 20:30:27 +02:00
The8472	ad3a791e2a	panic early when TrustedLen indicates a length > usize::MAX	2021-03-31 23:09:28 +02:00
C	2de8356f60	style: applying Rust style	2020-12-29 14:03:30 +00:00
C	bd49a60f29	refactor: moved SpecExtend into spec_extend.rs	2020-12-29 14:03:30 +00:00