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Pkgsrc changes:
* Remove one SunOS patch, apparently no longer needed.
* Adapt one patch for Darwin, adjust cargo checksum accordingly.
* Adjust bootstraps to version 1.50.0.
Version 1.51.0 (2021-03-25)
============================
Language
--------
- [You can now parameterize items such as functions, traits, and
`struct`s by constant values in addition to by types and
lifetimes.][79135] Also known as "const generics" E.g. you can
now write the following. Note: Only values of primitive integers,
`bool`, or `char` types are currently permitted.
```rust
struct GenericArray<T, const LENGTH: usize> {
inner: [T; LENGTH]
}
impl<T, const LENGTH: usize> GenericArray<T, LENGTH> {
const fn last(&self) -> Option<&T> {
if LENGTH == 0 {
None
} else {
Some(&self.inner[LENGTH - 1])
}
}
}
```
Compiler
--------
- [Added the `-Csplit-debuginfo` codegen option for macOS platforms.][79570]
This option controls whether debug information is split across
multiple files or packed into a single file. **Note** This option
is unstable on other platforms.
- [Added tier 3\* support for `aarch64_be-unknown-linux-gnu`,
`aarch64-unknown-linux-gnu_ilp32`, and
`aarch64_be-unknown-linux-gnu_ilp32` targets.][81455]
- [Added tier 3 support for `i386-unknown-linux-gnu` and
`i486-unknown-linux-gnu` targets.][80662]
- [The `target-cpu=native` option will now detect individual features
of CPUs.][80749]
- [Rust now uses `inline-asm` for stack probes when used with LLVM
11.0.1+][77885]
\* Refer to Rust's [platform support page][forge-platform-support]
for more information on Rust's tiered platform support.
Libraries
---------
- [`Box::downcast` is now also implemented for any `dyn Any + Send
+ Sync` object.][80945]
- [`str` now implements `AsMut<str>`.][80279]
- [`u64` and `u128` now implement `From<char>`.][79502]
- [`Error` is now implemented for `&T` where `T` implements `Error`.][75180]
- [`Poll::{map_ok, map_err}` are now implemented for `Poll<Option<Result<T,
E>>>`.][80968]
- [`unsigned_abs` is now implemented for all signed integer types.][80959]
- [`io::Empty` now implements `io::Seek`.][78044]
- [`rc::Weak<T>` and `sync::Weak<T>`'s methods such as `as_ptr`
are now implemented for `T: ?Sized` types.][80764]
Stabilized APIs
---------------
- [`Arc::decrement_strong_count`]
- [`Arc::increment_strong_count`]
- [`Once::call_once_force`]
- [`Peekable::next_if_eq`]
- [`Peekable::next_if`]
- [`Seek::stream_position`]
- [`array::IntoIter`]
- [`panic::panic_any`]
- [`ptr::addr_of!`]
- [`ptr::addr_of_mut!`]
- [`slice::fill_with`]
- [`slice::split_inclusive_mut`]
- [`slice::split_inclusive`]
- [`slice::strip_prefix`]
- [`slice::strip_suffix`]
- [`str::split_inclusive`]
- [`sync::OnceState`]
- [`task::Wake`]
Cargo
-----
- [Added the `split-debuginfo` profile option to control the -Csplit-debuginfo
codegen option.][cargo/9112]
- [Added the `resolver` field to `Cargo.toml` to enable the new
feature resolver and CLI option behavior.][cargo/8997] Version
2 of the feature resolver will try to avoid unifying features of
dependencies where that unification could be unwanted. Such as
using the same dependency with a `std` feature in a build scripts
and proc-macros, while using the `no-std` feature in the final
binary. See the [Cargo book documentation][feature-resolver@2.0]
for more information on the feature.
Rustdoc
-------
- [Rustdoc will now include documentation for methods available
from `Deref` traits.][80653]
- [You can now provide a `--default-theme` flag which sets the
default theme to use for documentation.][79642]
Various improvements to intra-doc links:
- [You can link to non-path primitives such as `slice`.][80181]
- [You can link to associated items.][74489]
- [You can now include generic parameters when linking to items,
like `Vec<T>`.][76934]
Misc
----
- [You can now pass `--include-ignored` to tests (e.g. with
`cargo test -- --include-ignored`) to include testing tests marked
`#[ignore]`.][80053]
Compatibility Notes
-------------------
- [WASI platforms no longer use the `wasm-bindgen` ABI, and instead
use the wasm32 ABI.][79998]
- [`rustc` no longer promotes division, modulo and indexing operations
to `const` that could fail.][80579]
- [The minimum version of glibc for the following platforms has
been bumped to version 2.31 for the distributed artifacts.][81521]
- `armv5te-unknown-linux-gnueabi`
- `sparc64-unknown-linux-gnu`
- `thumbv7neon-unknown-linux-gnueabihf`
- `armv7-unknown-linux-gnueabi`
- `x86_64-unknown-linux-gnux32`
Internal Only
-------------
- [Consistently avoid constructing optimized MIR when not doing codegen][80718]
[79135]: rust-lang/rust#79135
[74489]: rust-lang/rust#74489
[76934]: rust-lang/rust#76934
[79570]: rust-lang/rust#79570
[80181]: rust-lang/rust#80181
[79642]: rust-lang/rust#79642
[80945]: rust-lang/rust#80945
[80279]: rust-lang/rust#80279
[80053]: rust-lang/rust#80053
[79502]: rust-lang/rust#79502
[75180]: rust-lang/rust#75180
[79135]: rust-lang/rust#79135
[81521]: rust-lang/rust#81521
[80968]: rust-lang/rust#80968
[80959]: rust-lang/rust#80959
[80718]: rust-lang/rust#80718
[80653]: rust-lang/rust#80653
[80579]: rust-lang/rust#80579
[79998]: rust-lang/rust#79998
[78044]: rust-lang/rust#78044
[81455]: rust-lang/rust#81455
[80764]: rust-lang/rust#80764
[80749]: rust-lang/rust#80749
[80662]: rust-lang/rust#80662
[77885]: rust-lang/rust#77885
[cargo/8997]: rust-lang/cargo#8997
[cargo/9112]: rust-lang/cargo#9112
[feature-resolver@2.0]: https://doc.rust-lang.org/nightly/cargo/reference/features.html#feature-resolver-version-2
[`Once::call_once_force`]: https://doc.rust-lang.org/stable/std/sync/struct.Once.html#method.call_once_force
[`sync::OnceState`]: https://doc.rust-lang.org/stable/std/sync/struct.OnceState.html
[`panic::panic_any`]: https://doc.rust-lang.org/stable/std/panic/fn.panic_any.html
[`slice::strip_prefix`]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.strip_prefix
[`slice::strip_suffix`]: https://doc.rust-lang.org/stable/std/primitive.slice.html#method.strip_prefix
[`Arc::increment_strong_count`]: https://doc.rust-lang.org/nightly/std/sync/struct.Arc.html#method.increment_strong_count
[`Arc::decrement_strong_count`]: https://doc.rust-lang.org/nightly/std/sync/struct.Arc.html#method.decrement_strong_count
[`slice::fill_with`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.fill_with
[`ptr::addr_of!`]: https://doc.rust-lang.org/nightly/std/ptr/macro.addr_of.html
[`ptr::addr_of_mut!`]: https://doc.rust-lang.org/nightly/std/ptr/macro.addr_of_mut.html
[`array::IntoIter`]: https://doc.rust-lang.org/nightly/std/array/struct.IntoIter.html
[`slice::split_inclusive`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_inclusive
[`slice::split_inclusive_mut`]: https://doc.rust-lang.org/nightly/std/primitive.slice.html#method.split_inclusive_mut
[`str::split_inclusive`]: https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_inclusive
[`task::Wake`]: https://doc.rust-lang.org/nightly/std/task/trait.Wake.html
[`Seek::stream_position`]: https://doc.rust-lang.org/nightly/std/io/trait.Seek.html#method.stream_position
[`Peekable::next_if`]: https://doc.rust-lang.org/nightly/std/iter/struct.Peekable.html#method.next_if
[`Peekable::next_if_eq`]: https://doc.rust-lang.org/nightly/std/iter/struct.Peekable.html#method.next_if_eq- Loading branch information
