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This moves errors and all handling of numeric suffixes into the parser
rather than the lexer.
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This adds an optional suffix at the end of a literal token:
`"foo"bar`. An actual use of a suffix in a expression (or other literal
that the compiler reads) is rejected in the parser.
This doesn't switch the handling of numbers to this system, and doesn't
outlaw illegal suffixes for them yet.
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Allows parsing view items (`use` and `extern crate`) individually. Does not change behavior of any existing functions.
Closes #19024
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`Box<for<'a> Foo<&'a T> + 'a>` can be accepted. Also cleanup the visitor/fold
in general, exposing more callbacks.
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Came up on IRC that this was a bit unhelpful as to what should actually be *done*. I am new to changing compiler messages, please let me know if there's anything else that needs to be done to accomadate this change.
(My build system is still constantly crashing [Is bors contagious?], so this hasn't been formally `check`ed. I figure it's a simple enough change that any consequences [like compile-fail expected messages?] can be eyeballed by someone more experienced.)
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Make struct variant syntax more consistent with struct syntax and fix an
assert in middle::typeck.
Fix #19003
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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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Make struct variant syntax more consistent with struct syntax and fix an
assert in middle::typeck.
Fix #19003
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Struct variant field visibility is now inherited. Remove `pub` keywords
from declarations.
Closes #18641
[breaking-change]
r? @alexcrichton
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[breaking-change]
This will break any uses of macros that assumed () being a valid literal.
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Struct variant field visibility is now inherited. Remove `pub` keywords
from declarations.
Closes #18641
[breaking-change]
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Fix some old papercuts with diagnostics, e.g. tweaking spans, rewording messages. See individual commits.
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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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This corrects the error message to point at the literal, not the next
token.
Closes #17123.
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Adds a method for printing a fatal error and also a help message to the
parser and uses this in a variety of places to improve error messages.
Closes #12213.
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This can crop-up with a misconfigured editor or an unexpected
interaction between version control and certain operating systems.
Closes #11669.
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Num, NumCast, Unsigned, Float, Primitive and Int have been removed.
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This breaks code like:
struct Foo {
x: int,
}
let f: Foo = ...;
... f.x::<int> ...
Change this code to not contain an unused type parameter. For example:
struct Foo {
x: int,
}
let f: Foo = ...;
... f.x ...
Closes #18680.
[breaking-change]
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Closes #14197
Removes the `matchers` nonterminal.
If you're using `$foo:matchers` in a macro, write `$foo:tt` instead.
[breaking-change]
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completely.
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These paths also bind anonymous regions (or will, once HRTB is fully working).
Fixes #18423.
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Unicode characters and strings.
Use `\u0080`-`\u00ff` instead. ASCII/byte literals are unaffected.
This PR introduces a new function, `escape_default`, into the ASCII
module. This was necessary for the pretty printer to continue to
function.
RFC #326.
Closes #18062.
[breaking-change]
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bounds like any other "type parameter".
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Closes #18126.
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Conflicts:
src/libsyntax/parse/parser.rs
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Conflicts:
src/libcollections/slice.rs
src/libcore/failure.rs
src/libsyntax/parse/token.rs
src/test/debuginfo/basic-types-mut-globals.rs
src/test/debuginfo/simple-struct.rs
src/test/debuginfo/trait-pointers.rs
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Closes #15386.
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We can simplify these usages due to the new delimiter representation. `Parser::expect_open_delim` has been added for convenience.
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