This is needed for cases where we only need to know if a list item matches the given predicate (eg. in Servo, we need to know if attributes from different DOM elements are equal).
The current comment actually describes *co*-variance.
Fixing this to describe contravariance while keeping 'static in the definition was tricky so just changed to use 'short and 'long.
I found the typo in my attempt to understand the concept of variance itself and the comment confused me. I mention this to point out that I'm new to the concept so may have still got the definition wrong, so please review with care :)
This is a fairly trivial (but IMHO handy) change to implement IterBytes for IpAddr and SocketAddr.
I originally stumbled across this because I wanted to use a SocketAddr as a HashMap key and discovered that I couldn't do it directly. Had to impl IterBytes on a new intermediate type to work around it.
This is needed for cases where we only need to know if a list item
matches the given predicate (eg. in Servo, we need to know if attributes
from different DOM elements are equal).
The previous definition was actually describing covariance.
Fixing to describe contravariance while keeping 'static in the definition was tricky so just changed to use 'short and 'long.
Thinking about swap as an example of unsafe programming. This cleans it up a bit. It also removes type parametrization over `RawPtr` from the memcpy functions to make this compile.
It unsafe assumptions that any impl of RawPtr is for actual pointers,
that they can be copied by memcpy. Removing it is easy, so I don't
think it's solving a real problem.
I've always thought 'compile_and_link: ...' looked really awkward in our build output. Replace it with something more interesting. I'm open to alternatives to 'oxidize', like 'compile', anything but 'compile_and_link'.
Repair a rather embarassingly obvious hole that I created as part of #9629. In particular, prevent `&mut` borrows of data in an aliasable location. This used to be prevented through the restrictions mechanism, but in #9629 I modified those rules incorrectly.
r? @pcwalton
Fixes#11913
I was looking into #9303 and was curious if this would still be valuable. @kballard had already done 99% of the work, so I brought the branch up to date and added a feature gate. Any feedback would be appreciated; I wasn't sure if this should be set up as a syntax extension with `#[macro_registrar]`, and if so, where it should be located.
Original PR is here: #9255
TODO:
* [x] Convert to loadable syntax extension
* [x] Default to big endian
* [x] Add `target` identifier
* [x] Expand to include code points 128-255
It was decided that a consistent result across platforms would be the
most useful and least surprising. A "target" option has been added to
get the old behaviour of using the target platform's endianess.
fourcc!() allows you to embed FourCC (or OSType) values that are
evaluated as u32 literals. It takes a 4-byte ASCII string and produces
the u32 resulting in interpreting those 4 bytes as a u32, using either
the platform-native endianness, or explicitly as big or little endian.
I don't know if anything depends on MemReader::fill returning an empty slice instead of EndOfFile, but I'm pretty sure that MemReader::read_until should not go into an infinite loop.
These are ancient. I removed a bunch of questions that are less relevant - or completely unrelevant, updated other entries, and removed things that are already better expressed elsewhere.
Before:
test test::bench_nonpod_nonarena ... bench: 62 ns/iter (+/- 6)
test test::bench_pod_nonarena ... bench: 0 ns/iter (+/- 0)
After:
test test::bench_nonpod_nonarena ... bench: 158 ns/iter (+/- 11)
test test::bench_pod_nonarena ... bench: 48 ns/iter (+/- 2)
The other tests show no change, but are adjusted to use the generic
return value of `.iter` anyway so that this doesn't change in future.
benchmarking.
This allows a result to be marked as "used" by passing it to a function
LLVM cannot see inside. By making `iter` generic and using this
`black_box` on the result benchmarks can get this behaviour simply by
returning their computation.
Alex Crichton