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This patch replaces `MacItem` with `MacItems`.
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Change to resolve and update compiler and libs for uses.
[breaking-change]
Enum variants are now in both the value and type namespaces. This means that
if you have a variant with the same name as a type in scope in a module, you
will get a name clash and thus an error. The solution is to either rename the
type or the variant.
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Part of issue #16640. I am leaving this issue open to handle parsing of
higher-rank lifetimes in traits.
This change breaks code that used unboxed closures:
* Instead of `F:|&: int| -> int`, write `F:Fn(int) -> int`.
* Instead of `F:|&mut: int| -> int`, write `F:FnMut(int) -> int`.
* Instead of `F:|: int| -> int`, write `F:FnOnce(int) -> int`.
[breaking-change]
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This breaks code that looked like:
mymacro!(static::foo);
... where `mymacro!` expects a path or expression. Change such macros to
not accept keywords followed by `::`.
Closes #17298.
[breaking-change]
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`expr[]`, `expr[expr..]`, `expr[..expr]`,`expr[expr..expr]`
Uses the Slice and SliceMut traits.
Allows ... as well as .. in range patterns.
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The implementation essentially desugars during type collection and AST
type conversion time into the parameter scheme we have now. Only fully
qualified names--e.g. `<T as Foo>::Bar`--are supported.
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We were leaving these on the stack, causing spurious backtraces.
I've confirmed that this test fails without the fix.
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Fixes #13490.
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Remove ~~~ for code block specification. Use /// Over /** */ for doc
blocks.
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This prevents confusing errors when accidentally using an assignment
in an `if` expression. For example:
```rust
fn main() {
let x = 1u;
if x = x {
println!("{}", x);
}
}
```
Previously, this yielded:
```
test.rs:4:16: 4:17 error: expected `:`, found `!`
test.rs:4 println!("{}", x);
^
```
With this change, it now yields:
```
test.rs:3:8: 3:13 error: mismatched types: expected `bool`, found `()` (expected bool, found ())
test.rs:3 if x = x {
^~~~~
```
Closes issue #17283
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This makes having multiple restrictions at once cleaner.
Also drop NO_DOUBLEBAR restriction since it is never used.
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Replaces some usage of `.to_string()` with `.into_string()`
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The `StrInterner::clear()` method takes self immutably but can invalidate references returned by `StrInterner::get_ref`. Since `get_ref` is unused, just remove it.
Closes #17181
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Sized deallocation makes it pointless to provide an address that never
overlaps with pointers returned by an allocator. Code can branch on the
capacity of the allocation instead of a comparison with this sentinel.
This improves the situation in #8859, and the remaining issues are only
from the logging API, which should be disabled by default in optimized
release builds anyway along with debug assertions. The remaining issues
are part of #17081.
Closes #8859
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type they provide an implementation for.
This breaks code like:
mod foo {
struct Foo { ... }
}
impl foo::Foo {
...
}
Change this code to:
mod foo {
struct Foo { ... }
impl Foo {
...
}
}
Closes #17059.
RFC #155.
[breaking-change]
r? @brson
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This adds ‘help’ diagnostic messages to rustc. This is used for anything that
provides help to the user, particularly the `--explain` messages that were
previously integrated into the relevant error message.
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type they provide an implementation for.
This breaks code like:
mod foo {
struct Foo { ... }
}
impl foo::Foo {
...
}
Change this code to:
mod foo {
struct Foo { ... }
impl Foo {
...
}
}
Additionally, if you used the I/O path extension methods `stat`,
`lstat`, `exists`, `is_file`, or `is_dir`, note that these methods have
been moved to the the `std::io::fs::PathExtensions` trait. This breaks
code like:
fn is_it_there() -> bool {
Path::new("/foo/bar/baz").exists()
}
Change this code to:
use std::io::fs::PathExtensions;
fn is_it_there() -> bool {
Path::new("/foo/bar/baz").exists()
}
Closes #17059.
RFC #155.
[breaking-change]
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The other extension types already worked this way and it can be useful to track some state along with the extension.
I also removed the `BasicMacroExpander` and `BasicIdentMacroExpander` since the span inside of them was never used. The expander function types now directly implement the relevant trait.
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Replaces some usage of `.to_string()` with `.into_string()`
Signed-off-by: Peter Atashian <retep998@gmail.com>
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The string slices returned by `get_ref` can actually be
invalidated by calling `clear`. Since this method is unused,
it is easiest to simply remove it.
Closes #17181
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This PR creates a new lint : ``unused_extern_crate``, which do pretty much the same thing as ``unused_import``, but for ``extern crate`` statements. It is related to feature request #10385.
I adapted the code tracking used imports so that it tracks extern crates usage as well. This was mainly trial and error and while I believe all cases are covered, there might be some code I added that is useless (long compile times didn't give me the opportunity to check this in detail).
Also, I removed some unused ``extern crate`` statements from the libs, that where spotted by this new lint.
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The spans inside of these types were always None and never used. Pass
the expander function directly instead of wrapping it in one of these
types.
[breaking-change]
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This allows code to access the fields of tuples and tuple structs behind the feature gate `tuple_indexing`:
```rust
#![feature(tuple_indexing)]
let x = (1i, 2i);
assert_eq!(x.1, 2);
struct Point(int, int);
let origin = Point(0, 0);
assert_eq!(origin.0, 0);
assert_eq!(origin.1, 0);
```
Implements [RFC 53](https://github.com/rust-lang/rfcs/blob/master/active/0053-tuple-accessors.md). Closes #16950.
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For convenience, the traits are implemented for the respective bare
functions. Change code from this:
```rust
ItemDecorator(some_function)
// or
ItemModifier(some_other_function)
```
to
```rust
ItemDecorator(box some_function)
// or
ItemModifier(box some_other_function)
```
[breaking-change]
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Instead of `extern crate foo = bar`, write `extern crate bar as foo`.
Instead of `extern crate baz = "quux"`, write `extern crate "quux" as
baz`.
Closes #16461.
[breaking-change]
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