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This code is identical to io::util::copy()
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liblog, libregex, librustc, libstd
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This commit handles the fallout from deprecating `_with` and `_equiv` methods.
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This commit deprecates the `_equiv` family of methods on `HashMap` and
`HashSet` by instead generalizing the "normal" methods like `get` and
`remove` to use the new `std::borrow` infrastructure.
[breaking-change]
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Following [the collections reform
RFC](https://github.com/rust-lang/rfcs/pull/235),
this commit adds a new `borrow` module to libcore.
The module contains traits for borrowing data (`BorrowFrom` and
`BorrowFromMut`),
generalized cloning (`ToOwned`), and a clone-on-write smartpointer (`Cow`).
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This breaks code that referred to variant names in the same namespace as
their enum. Reexport the variants in the old location or alter code to
refer to the new locations:
```
pub enum Foo {
A,
B
}
fn main() {
let a = A;
}
```
=>
```
pub use self::Foo::{A, B};
pub enum Foo {
A,
B
}
fn main() {
let a = A;
}
```
or
```
pub enum Foo {
A,
B
}
fn main() {
let a = Foo::A;
}
```
[breaking-change]
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The forwards compatible parts of #18645, rebased. Converts implicit coercions from `[T, ..n]` to `&[T]` into explicit references.
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This moves chars() and lines() out of Buffer and into separate traits (CharsBuffer and LinesBuffer respectively) - this matches the pattern used for bytes() on Reader (with BytesReader).
(I came across this when I wanted a trait object of a Buffer, so that I could use read_line(); rustc errors about std::io::Buffer not being object-safe.)
[breaking-change]
Any uses of Buffer::lines() will need to use the new trait std::io::LinesBuffer.
The same is true for Buffer::chars() with std::io::CharsBuffer.
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This also impls `FormatWriter` for `Vec<u8>`
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For consistancy with ToString
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This test was somewhat sketchy already with a `loop` around `write`, so this
just adds some explicit synchronization to only call `write` once and guarantee
that the error happens.
Closes #18900
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I found some occurrences of "failure" and "fails" in the documentation. I changed them to "panics" if it means a task panic. Otherwise I left it as is, or changed it to "errors" to clearly distinguish them.
Also, I made a minor fix that is breaking the layout of a module page. "Example" is shown in an irrelevant place from the following page: http://doc.rust-lang.org/std/os/index.html
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It seems odd that the `AsRefReader`/`AsRefWriter` have the single method `by_ref()`. This creates the new traits `ByRefReader`/`ByRefWriter` and deprecates the old traits.
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The previous implementation was very likely to cause panics during
unwinding through this process:
- child panics, drops its receiver
- taskpool comes back around and sends another job over to that child
- the child receiver has hung up, so the taskpool panics on send
- during unwinding, the taskpool attempts to send a quit message to
the child, causing a panic during unwinding
- panic during unwinding causes a process abort
This meant that TaskPool upgraded any child panic to a full process
abort. This came up in Iron when it caused crashes in long-running
servers.
This implementation uses a single channel to communicate between
spawned tasks and the TaskPool, which significantly reduces the complexity
of the implementation and cuts down on allocation. The TaskPool uses
the channel as a single-producer-multiple-consumer queue.
Additionally, through the use of send_opt and recv_opt instead of
send and recv, this TaskPool is robust on the face of child panics,
both before, during, and after the TaskPool itself is dropped.
Due to the TaskPool no longer using an `init_fn_factory`, this is a
[breaking-change]
otherwise, the API has not changed.
If you used `init_fn_factory` in your code, and this change breaks for
you, you can instead use an `AtomicUint` counter and a channel to
move information into child tasks.
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This implements a considerable portion of rust-lang/rfcs#369 (tracked in #18640). Some interpretations had to be made in order to get this to work. The breaking changes are listed below:
[breaking-change]
- `core::num::{Num, Unsigned, Primitive}` have been deprecated and their re-exports removed from the `{std, core}::prelude`.
- `core::num::{Zero, One, Bounded}` have been deprecated. Use the static methods on `core::num::{Float, Int}` instead. There is no equivalent to `Zero::is_zero`. Use `(==)` with `{Float, Int}::zero` instead.
- `Signed::abs_sub` has been moved to `std::num::FloatMath`, and is no longer implemented for signed integers.
- `core::num::Signed` has been removed, and its methods have been moved to `core::num::Float` and a new trait, `core::num::SignedInt`. The methods now take the `self` parameter by value.
- `core::num::{Saturating, CheckedAdd, CheckedSub, CheckedMul, CheckedDiv}` have been removed, and their methods moved to `core::num::Int`. Their parameters are now taken by value. This means that
- `std::time::Duration` no longer implements `core::num::{Zero, CheckedAdd, CheckedSub}` instead defining the required methods non-polymorphically.
- `core::num::{zero, one, abs, signum}` have been deprecated. Use their respective methods instead.
- The `core::num::{next_power_of_two, is_power_of_two, checked_next_power_of_two}` functions have been deprecated in favor of methods defined a new trait, `core::num::UnsignedInt`
- `core::iter::{AdditiveIterator, MultiplicativeIterator}` are now only implemented for the built-in numeric types.
- `core::iter::{range, range_inclusive, range_step, range_step_inclusive}` now require `core::num::Int` to be implemented for the type they a re parametrized over.
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[breaking-change]
Any uses of Buffer::lines() and Buffer::chars() will need to use the new trait std::io::BufferPrelude.
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The subtraction was erroneously backwards, returning negative durations!
Closes #18925
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Closes #18842.
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This commit deprecates the entire libtime library in favor of the
externally-provided libtime in the rust-lang organization. Users of the
`libtime` crate as-is today should add this to their Cargo manifests:
[dependencies.time]
git = "https://github.com/rust-lang/time"
To implement this transition, a new function `Duration::span` was added to the
`std::time::Duration` time. This function takes a closure and then returns the
duration of time it took that closure to execute. This interface will likely
improve with `FnOnce` unboxed closures as moving in and out will be a little
easier.
Due to the deprecation of the in-tree crate, this is a:
[breaking-change]
cc #18855, some of the conversions in the `src/test/bench` area may have been a
little nicer with that implemented
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This commit deprecates the entire libtime library in favor of the
externally-provided libtime in the rust-lang organization. Users of the
`libtime` crate as-is today should add this to their Cargo manifests:
[dependencies.time]
git = "https://github.com/rust-lang/time"
To implement this transition, a new function `Duration::span` was added to the
`std::time::Duration` time. This function takes a closure and then returns the
duration of time it took that closure to execute. This interface will likely
improve with `FnOnce` unboxed closures as moving in and out will be a little
easier.
Due to the deprecation of the in-tree crate, this is a:
[breaking-change]
cc #18855, some of the conversions in the `src/test/bench` area may have been a
little nicer with that implemented
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The methods have been moved into Float and SignedInt
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Num, NumCast, Unsigned, Float, Primitive and Int have been removed.
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This removes the need for libcore to depend on libm. `abs_sub` is not as useful for integers.
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cc https://github.com/rust-lang/rust/issues/18000
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