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* Point at where the token was expected instead of the last token
successfuly parsed.
* Only show `unexpected token` if the next char and the unexpected token
don't have the same span.
* Change some cfail and pfail tests to ui test.
* Don't show all possible tokens in span label if they are more than 6.
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```rust
error: expected one of `.`, `;`, `?`, `}`, or an operator, found `)`
--> $DIR/token-error-correct-3.rs:29:9
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25 | foo()
| - expected one of `.`, `;`, `?`, `}`, or an operator after this
...
29 | } else {
| ^ unexpected token
```
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```rust
struct S;
impl S {
pub hello_method(&self) {
println!("Hello");
}
}
fn main() { S.hello_method(); }
```
```rust
error: can't qualify macro invocation with `pub`
--> file.rs:3:4
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3 | pub hello_method(&self) {
| ^^^- - expected `!` here for a macro invocation
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| did you mean to write `fn` here for a method declaration?
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= help: try adjusting the macro to put `pub` inside the invocation
```
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Given the following statement
```rust
pub (a) fn afn() {}
```
Provide the following diagnostic:
```rust
error: incorrect restriction in `pub`
--> file.rs:15:1
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15 | pub (a) fn afn() {}
| ^^^^^^^
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= help: some valid visibility restrictions are:
`pub(crate)`: visible only on the current crate
`pub(super)`: visible only in the current module's parent
`pub(in path::to::module)`: visible only on the specified path
help: to make this visible only to module `a`, add `in` before the path:
| pub (in a) fn afn() {}
```
Remove cruft from old `pub(path)` syntax.
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`TokenStream`-based attributes, paths in attribute and derive macro invocations
This PR
- refactors `Attribute` to use `Path` and `TokenStream` instead of `MetaItem`.
- supports macro invocation paths for attribute procedural macros.
- e.g. `#[::foo::attr_macro] struct S;`, `#[cfg_attr(all(), foo::attr_macro)] struct S;`
- supports macro invocation paths for derive procedural macros.
- e.g. `#[derive(foo::Bar, super::Baz)] struct S;`
- supports arbitrary tokens as arguments to attribute procedural macros.
- e.g. `#[foo::attr_macro arbitrary + tokens] struct S;`
- supports using arbitrary tokens in "inert attributes" with derive procedural macros.
- e.g. `#[derive(Foo)] struct S(#[inert arbitrary + tokens] i32);`
where `#[proc_macro_derive(Foo, attributes(inert))]`
r? @nrc
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Whenever we parse a chain of binary operations, as long as the first
operation is `<` and the subsequent operations are either `>` or `<`,
present the following diagnostic help:
use `::<...>` instead of `<...>` if you meant to specify type arguments
This will lead to spurious recommendations on situations like
`2 < 3 < 4` but should be clear from context that the help doesn't apply
in that case.
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Add catch {} to AST
Part of #39849. Builds on #39864.
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Give spans to individual path segments in AST
And use these spans in path resolution diagnostics.
The spans are spans of identifiers in segments, not whole segments. I'm not sure what spans are more useful in general, but identifier spans are a better fit for resolve errors.
HIR still doesn't have spans.
Fixes https://github.com/rust-lang/rust/pull/38927#discussion_r95336667 https://github.com/rust-lang/rust/pull/38890#issuecomment-271731008
r? @nrc @eddyb
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Update syntax for `pub(restricted)`
Update the syntax before stabilization.
cc https://github.com/rust-lang/rust/issues/32409
r? @nikomatsakis
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`tokenstream::TokenTree::Sequence`.
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save-analysis: be more paranoid about generated paths
fixes https://github.com/rust-lang-nursery/rls/issues/160
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This commit updates the version number to 1.17.0 as we're not on that version of
the nightly compiler, and at the same time this updates src/stage0.txt to
bootstrap from freshly minted beta compiler and beta Cargo.
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fixes https://github.com/rust-lang-nursery/rls/issues/160
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Bounds parsing refactoring 2
See https://github.com/rust-lang/rust/pull/37511 for previous discussion.
cc @matklad
Relaxed parsing rules:
- zero bounds after `:` are allowed in all contexts.
- zero predicates are allowed after `where`.
- trailing separator `,` is allowed after predicates in `where` clauses not followed by `{`.
Other parsing rules:
- trailing separator `+` is still allowed in all bound lists.
Code is also cleaned up and tests added.
I haven't touched parsing of trait object types yet, I'll do it later.
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exclusive range patterns
adds `..` patterns to the language under a feature gate (`exclusive_range_pattern`).
This allows turning
``` rust
match i {
0...9 => {},
10...19 => {},
20...29 => {},
_ => {}
}
```
into
``` rust
match i {
0..10 => {},
10..20 => {},
20..30 => {},
_ => {}
}
```
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Refactor `TokenStream`
r? @nrc
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Fix regression in parsing of trait object types
Fixes https://github.com/rust-lang/rust/issues/39169
Accepting parens in this position is a regression itself, introduced in Rust 1.6 by https://github.com/rust-lang/rust/pull/29870, so I hope to revert this in my next bounds refactoring patch (possibly with a warning, crater run, etc).
r? @eddyb
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Refactor the parser to consume token trees
This is groundwork for efficiently parsing attribute proc macro invocations, bang macro invocations, and `TokenStream`-based attributes and fragment matchers.
This improves parsing performance by 8-15% and expansion performance by 0-5% on a sampling of the compiler's crates.
r? @nrc
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