The struct_variant feature was accepted and is no longer feature gated.
See #19122, #19124
§6.1.6 Enumerations shows an example of a struct-like enum variant.
Since commit 46068c9da, call to `reserve()` on empty vec allocates
exactly requested capacity, so unroll of first iteration may help only
with branch prediction.
Resolves #29672. This happened because rust runtime startup objects, rsbegin.o and rsend.o, were not included in the target libraries package for -windows-gnu.
r? @alexcrichton
The `enable-nonzeroing-move-hints` flag name was too long and caused misalignment of the help text.
Now calculating the needed padding dynamically from the available flags instead.
When merging two sorted blocks `left` and `right` if the last element in
`left` is <= the first in `right`, the blocks are already sorted.
Add this as an additional fast path by simply copying the whole left
block into the output and advancing the left pointer. The right block is
then treated the same way by the already present logic in the merge
loop.
Reduces runtime of .sort() to less than 50% of the previous, if the data
was already perfectly sorted. Sorted data with a few swaps are also
sorted quicker than before. The overhead of one comparison per merge
seems to be negligible.
Allow the changing of `target_family` through flexible configuration. The whole computing world isn't just a binary of *nix and Windows! Makes porting `libstd` and co to new platforms a lot less painful.
* Store the native representation directly in the `ExitStatus` structure instead
of a "parsed version" (mostly for Unix).
* On Windows, be more robust against processes exiting with the status of 259.
Unfortunately this exit code corresponds to `STILL_ACTIVE`, causing libstd to
think the process was still alive, causing an infinite loop. Instead the loop
is removed altogether and `WaitForSingleObject` is used to wait for the
process to exit.
* Store the native representation directly in the `ExitStatus` structure instead
of a "parsed version" (mostly for Unix).
* On Windows, be more robust against processes exiting with the status of 259.
Unfortunately this exit code corresponds to `STILL_ACTIVE`, causing libstd to
think the process was still alive, causing an infinite loop. Instead the loop
is removed altogether and `WaitForSingleObject` is used to wait for the
process to exit.
Handle them in `middle::reachable` instead (no optimizations so far, just drop all trait impl items into the reachable set, as before). Addresses the concerns from https://github.com/rust-lang/rust/pull/29291#discussion_r43672413
\+ In `middle::reachable` don't treat impls of `Drop` specially, they are subsumed by the general impl treatment.
\+ Add some tests checking reachability of trait methods written in UFCS form
\+ Minor refactoring in the second commit
r? @alexcrichton
