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Fixes #20943
Signed-off-by: Peter Atashian <retep998@gmail.com>
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This commit is an implementation of [RFC 503][rfc] which is a stabilization
story for the prelude. Most of the RFC was directly applied, removing reexports.
Some reexports are kept around, however:
* `range` remains until range syntax has landed to reduce churn.
* `Path` and `GenericPath` remain until path reform lands. This is done to
prevent many imports of `GenericPath` which will soon be removed.
* All `io` traits remain until I/O reform lands so imports can be rewritten all
at once to `std::io::prelude::*`.
This is a breaking change because many prelude reexports have been removed, and
the RFC can be consulted for the exact list of removed reexports, as well as to
find the locations of where to import them.
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0503-prelude-stabilization.md
[breaking-change]
Closes #20068
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Remove most of the public reexports mentioned in #19253
These are all leftovers from the enum namespacing transition
In particular:
* src/libstd/num/strconv.rs
* ExponentFormat
* SignificantDigits
* SignFormat
* src/libstd/path/windows.rs
* PathPrefix
* src/libstd/sys/windows/timer.rs
* Req
* src/libcollections/str.rs
* MaybeOwned
* src/libstd/collections/hash/map.rs
* Entry
* src/libstd/collections/hash/table.rs
* BucketState
* src/libstd/dynamic_lib.rs
* Rtld
* src/libstd/io/net/ip.rs
* IpAddr
* src/libstd/os.rs
* MemoryMapKind
* MapOption
* MapError
* src/libstd/sys/common/net.rs
* SocketStatus
* InAddr
* src/libstd/sys/unix/timer.rs
* Req
[breaking-change]
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followed by a semicolon.
This allows code like `vec![1i, 2, 3].len();` to work.
This breaks code that uses macros as statements without putting
semicolons after them, such as:
fn main() {
...
assert!(a == b)
assert!(c == d)
println(...);
}
It also breaks code that uses macros as items without semicolons:
local_data_key!(foo)
fn main() {
println("hello world")
}
Add semicolons to fix this code. Those two examples can be fixed as
follows:
fn main() {
...
assert!(a == b);
assert!(c == d);
println(...);
}
local_data_key!(foo);
fn main() {
println("hello world")
}
RFC #378.
Closes #18635.
[breaking-change]
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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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This patch continues runtime removal by moving out timer-related code
into `sys`.
Because this eliminates APIs in `libnative` and `librustrt`, it is a:
[breaking-change]
This functionality is likely to be available publicly, in some form,
from `std` in the future.
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