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Update tests
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Merge `unused_tuple_struct_fields` into `dead_code`
This implicitly upgrades the lint from `allow` to `warn` and places it into the `unused` lint group.
[Discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Moving.20.60unused_tuple_struct_fields.60.20from.20allow.20to.20warn)
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Attribute values must be literals. The error you get when that doesn't
hold is pretty bad, e.g.:
```
unexpected expression: 1 + 1
```
You also get the same error if the attribute value is a literal, but an
invalid literal, e.g.:
```
unexpected expression: "foo"suffix
```
This commit does two things.
- Changes the error message to "attribute value must be a literal",
which gives a better idea of what the problem is and how to fix it. It
also no longer prints the invalid expression, because the carets below
highlight it anyway.
- Separates the "not a literal" case from the "invalid literal" case.
Which means invalid literals now get the specific error at the literal
level, rather than at the attribute level.
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never_patterns: Parse match arms with no body
Never patterns are meant to signal unreachable cases, and thus don't take bodies:
```rust
let ptr: *const Option<!> = ...;
match *ptr {
None => { foo(); }
Some(!),
}
```
This PR makes rustc accept the above, and enforces that an arm has a body xor is a never pattern. This affects parsing of match arms even with the feature off, so this is delicate. (Plus this is my first non-trivial change to the parser).
~~The last commit is optional; it introduces a bit of churn to allow the new suggestions to be machine-applicable. There may be a better solution? I'm not sure.~~ EDIT: I removed that commit
r? `@compiler-errors`
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Fix parser ICE from attrs
Fixes #118531,
Fixes #118530.
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Co-authored-by: Adrian <adrian.iosdev@gmail.com>
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Remove asmjs
Fulfills [MCP 668](https://github.com/rust-lang/compiler-team/issues/668).
`asmjs-unknown-emscripten` does not work as-specified, and lacks essential upstream support for generating asm.js, so it should not exist at all.
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Tweak error and move tests
r? `@Nilstrieb`
Split off #117565.
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Handle and recover `match expr { pat >= { arm } }`.
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Recover from incorrectly ordered/duplicated function keywords
Fixes #115714
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Give a better diagnostic for missing parens in Fn* bounds
Fixes #108109
It would be nice to try and recover here, but I'm not sure it's worth the effort, especially as the bounds on the recovered function would be incorrect.
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When parsing a closure without a body that is surrounded by a block,
suggest moving the opening brace after the closure head.
Fix #116608.
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Detect missing `=>` after match guard during parsing
```
error: expected one of `,`, `:`, or `}`, found `.`
--> $DIR/missing-fat-arrow.rs:25:14
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LL | Some(a) if a.value == b {
| - while parsing this struct
LL | a.value = 1;
| -^ expected one of `,`, `:`, or `}`
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| while parsing this struct field
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help: try naming a field
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LL | a: a.value = 1;
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help: you might have meant to start a match arm after the match guard
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LL | Some(a) if a.value == b => {
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```
Fix #78585.
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```
error: expected one of `,`, `:`, or `}`, found `.`
--> $DIR/missing-fat-arrow.rs:25:14
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LL | Some(a) if a.value == b {
| - while parsing this struct
LL | a.value = 1;
| -^ expected one of `,`, `:`, or `}`
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| while parsing this struct field
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help: try naming a field
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LL | a: a.value = 1;
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help: you might have meant to start a match arm after the match guard
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LL | Some(a) if a.value == b => {
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```
Fix #78585.
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Suggests turbofish in patterns
Fixes #114112
r? ```@estebank```
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Detect actual span for getting unexpected token from parsing macros
Fixes #112458
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fix(parse): return unpected when current token is EOF
close https://github.com/rust-lang/rust/issues/111148
#111148 panic occurred because [FatalError.raise()](https://github.com/bvanjoi/rust/blob/master/compiler/rustc_parse/src/parser/mod.rs#LL540C3-L540C3) was encountered which caused by `Eof` and `Pound`(the last token) had same span, when parsing `#` in `fn a<<i<Y<w<>#`.
<img width="825" alt="image" src="https://user-images.githubusercontent.com/30187863/236612589-9e2c6a0b-18cd-408c-b636-c12a51cbcf1c.png">
There are a few ways to solve this problem:
- Change the action assign for [self.last_unexpected_token_span](https://github.com/rust-lang/rust/blob/master/compiler/rustc_parse/src/parser/diagnostics.rs#L592), for example, if current token is `Eof`, then return Error directly.
- Avoid triggering the `FatalError` when the current token is `Eof`.
I have chosen the second option because executing `expected_one_of_not_found` when the token is `Eof` but not in `ediable` seems reasonable.
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