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f64 methods have been stable since rust 1.0, but f32 never got stabilised.
I suggest backporting this to beta as well (needs changing stablilisation version then).
r? @aturon
Fixes https://github.com/rust-lang/rfcs/issues/1438
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f64 methods have been stable since rust 1.0, but f32 never got stabilised.
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When looking in the documentation I often scan the examples the first thing I do. In these 3 cases it's not obvious which direction the operation happens by adding this comment it makes it more obvious.
r? @steveklabnik
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Are trait impls still insta-stable? Considering that this design has been around for a long time on `String` and `OsString` it probably doesn't matter much...
The `From` impl is a bit strange to me. It's stolen from `OsString` but I'm not really sure about it... `String` just impls `From<&str>` instead, would that make more sense?
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Resolves #30507
r? @steveklabnik
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This PR siliences some warnings when compiling stdlib with --test. Mostly remove some unused imports and added a few `#[allow(..)]`.
I also marked some signal handling functions with `#[cfg(not(test))]`, because they are only called through `rt::lang_start`, which is also marked as `#[cfg(not(test))]`
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There's no need for us to redeclare it in an extern block.
We should probably put the syscall number constants in libc too.
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The first line (paragraph?) of a doc-comment is what rustdoc shows when listing items of a module.
What makes `Instant` and `SystemTime` different is important enough to be there. (Though feel free to bikeshed the wording.)
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r? @steveklabnik
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* If the requested descriptors to inherit are stdio descriptors there
are situations where they will not be set correctly
* Example: parent's stdout --> child's stderr
parent's stderr --> child's stdout
* Solution: if the requested descriptors for the child are stdio
descriptors, `dup` them before overwriting the child's stdio
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Types like `&AssertRecoverSafe<T>` and `Rc<AssertRecoverSafe<T>>` were
mistakenly not considered recover safe, but the point of the assertion wrapper
is that it indeed is! This was caused by an interaction between the
`RecoverSafe` and `NoUnsafeCell` marker traits, and this is updated by adding an
impl of the `NoUnsafeCell` marker trait for `AssertRecoverSafe` to ensure that
it never interacts with the other negative impls of `RecoverSafe`.
cc #30510
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r? @alexcrichton
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There's no need for us to redeclare it in an extern block.
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The `dynamic_lib` library has been deprecated in favor of contents on crates.io, but apparently `libloading` is a more specific direction that fits the need.
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Resolves #30507
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Currently a compiler can be built with the `--disable-elf-tls` option for compatibility with OSX 10.6 which doesn't have ELF TLS. This is unfortunate, however, as a whole new compiler must be generated which can take some time. These commits add a new (feature gated) `cfg(target_thread_local)` annotation set by the compiler which indicates whether `#[thread_local]` is available for use. The compiler now interprets `MACOSX_DEPLOYMENT_TARGET` (a standard environment variable) to set this flag on OSX. With this we may want to start compiling our OSX nightlies with `MACOSX_DEPLOYMENT_TARGET` set to 10.6 which would allow the compiler out-of-the-box to generate 10.6-compatible binaries.
For now the compiler still by default targets OSX 10.7 by allowing ELF TLS by default (e.g. if `MACOSX_DEPLOYMENT_TARGET` isn't set).
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All these definitions can now be written in Rust, so do so!
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This transitions the standard library's `thread_local!` macro to use the
freshly-added and gated `#[cfg(target_thread_local)]` attribute. This greatly
simplifies the `#[cfg]` logic in play here, but requires that the standard
library expose both the OS and ELF TLS implementation modules as unstable
implementation details.
The implementation details were shuffled around a bit but end up generally
compiling to the same thing.
Closes #26581 (this supersedes the need for the option)
Closes #27057 (this also starts ignoring the option)
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Closes #30156.
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Types like `&AssertRecoverSafe<T>` and `Rc<AssertRecoverSafe<T>>` were
mistakenly not considered recover safe, but the point of the assertion wrapper
is that it indeed is! This was caused by an interaction between the
`RecoverSafe` and `NoUnsafeCell` marker traits, and this is updated by adding an
impl of the `NoUnsafeCell` marker trait for `AssertRecoverSafe` to ensure that
it never interacts with the other negative impls of `RecoverSafe`.
cc #30510
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Lots of cruft to remove!
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Lots of cruft to remove!
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- upgrades libc to version with si_addr support in openbsd
- declares libc use for getentropy
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It returns sizeof(dirent_t), so I'm not sure why its return type is int.
It's only used once, and that usage immediately casts it to usize.
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Rust already supports Linux's getrandom(2), which is very similar and
was based on getentropy(2). This is a pretty clean, simple addition that
uses the same approach as the iOS randomness API support.
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I didn't see any reason that debug couldn't be added to this object, since every field derives debug.
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This PR adds `memchr`and `memrchr` based on @BurntSushi 's rust-memchr crate to libstd (as discussed in #30151).
I've update some places in libstd to use memchr/memrchr, but I am not sure if there are other places where it could be used as well.
ref #30076
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