Rollup of 5 pull requests #108530
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Rollup of 5 pull requests #108530
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The extra query is unnecessary in the common case of not having fuel.
Implement read_buf for TcpStream, Stdin, StdinLock, ChildStdout, ChildStderr (and internally for AnonPipe, Handle, Socket), so that it skips buffer initialization. The other provided methods like read_to_string and read_to_end are implemented in terms of read_buf and so benefit from the optimization as well. This commit also implements read_vectored and is_read_vectored where applicable.
…re-11, r=estebank
Stabilize `#![feature(target_feature_11)]`
## Stabilization report
### Summary
Allows for safe functions to be marked with `#[target_feature]` attributes.
Functions marked with `#[target_feature]` are generally considered as unsafe functions: they are unsafe to call, cannot be assigned to safe function pointers, and don't implement the `Fn*` traits.
However, calling them from other `#[target_feature]` functions with a superset of features is safe.
```rust
// Demonstration function
#[target_feature(enable = "avx2")]
fn avx2() {}
fn foo() {
// Calling `avx2` here is unsafe, as we must ensure
// that AVX is available first.
unsafe {
avx2();
}
}
#[target_feature(enable = "avx2")]
fn bar() {
// Calling `avx2` here is safe.
avx2();
}
```
### Test cases
Tests for this feature can be found in [`src/test/ui/rfcs/rfc-2396-target_feature-11/`](https://github.com/rust-lang/rust/tree/b67ba9ba208ac918228a18321fc3a11a99b1c62b/src/test/ui/rfcs/rfc-2396-target_feature-11/).
### Edge cases
- rust-lang#73631
Closures defined inside functions marked with `#[target_feature]` inherit the target features of their parent function. They can still be assigned to safe function pointers and implement the appropriate `Fn*` traits.
```rust
#[target_feature(enable = "avx2")]
fn qux() {
let my_closure = || avx2(); // this call to `avx2` is safe
let f: fn() = my_closure;
}
```
This means that in order to call a function with `#[target_feature]`, you must show that the target-feature is available while the function executes *and* for as long as whatever may escape from that function lives.
### Documentation
- Reference: rust-lang/reference#1181
---
cc tracking issue rust-lang#69098
r? ``@ghost``
…riplett Move IpAddr, SocketAddr and V4+V6 related types to `core` Implements RFC rust-lang/rfcs#2832. The RFC has completed FCP with disposition merge, but is not yet merged. Moves IP types to `core` as specified in the RFC. The full list of moved types is: `IpAddr`, `Ipv4Addr`, `Ipv6Addr`, `SocketAddr`, `SocketAddrV4`, `SocketAddrV6`, `Ipv6MulticastScope` and `AddrParseError`. Doing this move was one of the main driving arguments behind rust-lang#78802.
Implement read_buf for a few more types Implement read_buf for TcpStream, Stdin, StdinLock, ChildStdout, ChildStderr (and internally for AnonPipe, Handle, Socket), so that it skips buffer initialization. The other provided methods like read_to_string and read_to_end are implemented in terms of read_buf and so benefit from the optimization as well. This commit also implements read_vectored and is_read_vectored where applicable.
…tion-fuel, r=WaffleLapkin Lazily compute crate name for consider_optimizing The extra query is unnecessary in the common case of not having fuel.
…sions, r=Nilstrieb Avoid `&str` to `String` conversions This patch removes some unnecessary `&str` to `String` conversions.
rustbot
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@bors r+ rollup=never p=5 |
bors
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⌛ Testing commit 18d4a7f with merge 626dce39b08b65e962214e3f0dc1b6ec0fc2bf3e... |
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Successful merges:
#![feature(target_feature_11)]#99767 (Stabilize#![feature(target_feature_11)])core#104265 (Move IpAddr, SocketAddr and V4+V6 related types tocore)&strtoStringconversions #108523 (Avoid&strtoStringconversions)Failed merges:
r? @ghost
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