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It was added in #130349, but it's not used meaningfully, and causes
difficulties for Nonterminal removal in #124141.
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Current places where `Interpolated` is used are going to change to
instead use invisible delimiters. This prepares for that.
- It adds invisible delimiter cases to the `can_begin_*`/`may_be_*`
methods and the `failed_to_match_macro` that are equivalent to the
existing `Interpolated` cases.
- It adds panics/asserts in some places where invisible delimiters
should never occur.
- In `Parser::parse_struct_fields` it excludes an ident + invisible
delimiter from special consideration in an error message, because
that's quite different to an ident + paren/brace/bracket.
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Pasted metavariables are wrapped in invisible delimiters, which
pretty-print as empty strings, and changing that can break some proc
macros. But error messages saying "expected identifer, found ``" are
bad. So this commit adds support for metavariables in `TokenDescription`
so they print as "metavariable" in error messages, instead of "``".
It's not used meaningfully yet, but will be needed to get rid of
interpolated tokens.
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It's not used meaningfully yet, but will be needed to get rid of
interpolated tokens.
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Rollup of 8 pull requests
Successful merges:
- #123947 (Add vec_deque::Iter::as_slices and friends)
- #125405 (Add std::thread::add_spawn_hook.)
- #133175 (ci: use free runner in dist-i686-msvc)
- #133183 (Mention std::fs::remove_dir_all in std::fs::remove_dir)
- #133188 (Add `visit` methods to ast nodes that already have `walk`s on ast visitors)
- #133201 (Remove `TokenKind::InvalidPrefix`)
- #133207 (Default-enable `llvm_tools_enabled` when no `config.toml` is present)
- #133213 (Correct the tier listing of `wasm32-wasip2`)
r? `@ghost`
`@rustbot` modify labels: rollup
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Resolve tweaks
A couple of small perf improvements, and some minor refactorings, all in `rustc_resolve`.
r? `@petrochenkov`
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It was added in #123752 to handle some cases involving emoji, but it
isn't necessary because it's always treated the same as
`TokenKind::InvalidIdent`. This commit removes it, which makes things a
little simpler.
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Trim whitespace in RemoveLet primary span
Separate `RemoveLet` span into primary span for `let` and removal suggestion span for `let `, so that primary span does not include whitespace.
Fixes: #133031
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If a macro statement has been parsed after `else`, suggest a missing `if`:
```
error: expected `{`, found `falsy`
--> $DIR/else-no-if.rs:47:12
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LL | } else falsy! {} {
| ---- ^^^^^
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| expected an `if` or a block after this `else`
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help: add an `if` if this is the condition of a chained `else if` statement
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LL | } else if falsy! {} {
| ++
```
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Look at the expression that was parsed when trying to recover from a bad `if` condition to determine what was likely intended by the user beyond "maybe this was meant to be an `else` body".
```
error: expected `{`, found `map`
--> $DIR/missing-dot-on-if-condition-expression-fixable.rs:4:30
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LL | for _ in [1, 2, 3].iter()map(|x| x) {}
| ^^^ expected `{`
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help: you might have meant to write a method call
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LL | for _ in [1, 2, 3].iter().map(|x| x) {}
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```
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Separate `RemoveLet` span into primary span for `let` and removal
suggestion span for `let `, so that primary span does not include
whitespace.
Fixes: #133031
Signed-off-by: Tyrone Wu <wudevelops@gmail.com>
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`to_lowercase` allocates, but `eq_ignore_ascii_case` doesn't. This path
is hot enough that this makes a small but noticeable difference in
benchmarking.
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Add Unicode block-drawing compiler output support
Add nightly-only theming support to rustc output using Unicode box
drawing characters instead of ASCII-art to draw the terminal UI.
In order to enable, the flags `-Zunstable-options=yes --error-format=human-unicode` must be passed in.
After:
```
error: foo
╭▸ test.rs:3:3
│
3 │ X0 Y0 Z0
│ ┌───╿──│──┘
│ ┌│───│──┘
│ ┏││━━━┙
│ ┃││
4 │ ┃││ X1 Y1 Z1
5 │ ┃││ X2 Y2 Z2
│ ┃│└────╿──│──┘ `Z` label
│ ┃└─────│──┤
│ ┗━━━━━━┥ `Y` is a good letter too
│ `X` is a good letter
╰╴
note: bar
╭▸ test.rs:4:3
│
4 │ ┏ X1 Y1 Z1
5 │ ┃ X2 Y2 Z2
6 │ ┃ X3 Y3 Z3
│ ┗━━━━━━━━━━┛
├ note: bar
╰ note: baz
note: qux
╭▸ test.rs:4:3
│
4 │ X1 Y1 Z1
╰╴ ━━━━━━━━
```
Before:
```
error: foo
--> test.rs:3:3
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3 | X0 Y0 Z0
| ___^__-__-
| |___|__|
| ||___|
| |||
4 | ||| X1 Y1 Z1
5 | ||| X2 Y2 Z2
| |||____^__-__- `Z` label
| ||_____|__|
| |______| `Y` is a good letter too
| `X` is a good letter
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note: bar
--> test.rs:4:3
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4 | / X1 Y1 Z1
5 | | X2 Y2 Z2
6 | | X3 Y3 Z3
| |__________^
= note: bar
= note: baz
note: qux
--> test.rs:4:3
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4 | X1 Y1 Z1
| ^^^^^^^^
```
After:
Before:
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Add nightly-only theming support to rustc output using Unicode box
drawing characters instead of ASCII-art to draw the terminal UI:
After:
```
error: foo
╭▸ test.rs:3:3
│
3 │ X0 Y0 Z0
│ ┌───╿──│──┘
│ ┌│───│──┘
│ ┏││━━━┙
│ ┃││
4 │ ┃││ X1 Y1 Z1
5 │ ┃││ X2 Y2 Z2
│ ┃│└────╿──│──┘ `Z` label
│ ┃└─────│──┤
│ ┗━━━━━━┥ `Y` is a good letter too
│ `X` is a good letter
╰╴
note: bar
╭▸ test.rs:4:3
│
4 │ ┏ X1 Y1 Z1
5 │ ┃ X2 Y2 Z2
6 │ ┃ X3 Y3 Z3
│ ┗━━━━━━━━━━┛
├ note: bar
╰ note: baz
note: qux
╭▸ test.rs:4:3
│
4 │ X1 Y1 Z1
╰╴ ━━━━━━━━
```
Before:
```
error: foo
--> test.rs:3:3
|
3 | X0 Y0 Z0
| ___^__-__-
| |___|__|
| ||___|
| |||
4 | ||| X1 Y1 Z1
5 | ||| X2 Y2 Z2
| |||____^__-__- `Z` label
| ||_____|__|
| |______| `Y` is a good letter too
| `X` is a good letter
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note: bar
--> test.rs:4:3
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4 | / X1 Y1 Z1
5 | | X2 Y2 Z2
6 | | X3 Y3 Z3
| |__________^
= note: bar
= note: baz
note: qux
--> test.rs:4:3
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4 | X1 Y1 Z1
| ^^^^^^^^
```
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Enforce that raw lifetimes must be valid raw identifiers
Make sure that the identifier part of a raw lifetime is a valid raw identifier. This precludes `'r#_` and all module segment paths for now.
I don't believe this is compelling to support. This was raised by `@ehuss` in https://github.com/rust-lang/reference/pull/1603#discussion_r1822726753 (well, specifically the `'r#_` case), but I don't see why we shouldn't just make it consistent with raw identifiers.
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It caused a test regression in the `cfg_eval.rs` crate. (The bugfix
in #129346 was in a different commit; this commit was just a code
simplification.)
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Use `token_descr` more in error messages
This is the first two commits from #124141, put into their own PR to get things rolling. Commit messages have the details.
r? ``@estebank``
cc ``@petrochenkov``
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By using `token_descr`, as is done for many other errors, we can get
slightly better descriptions in error messages, e.g.
"macro expansion ignores token `let` and any following" becomes
"macro expansion ignores keyword `let` and any tokens following".
This will be more important once invisible delimiters start being
mentioned in error messages -- without this commit, that leads to error
messages such as "error at ``" because invisible delimiters are
pretty printed as an empty string.
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These are all standard dictionary words and don't require hyphenation.
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Rollup of 9 pull requests
Successful merges:
- #122670 (Fix bug where `option_env!` would return `None` when env var is present but not valid Unicode)
- #131095 (Use environment variables instead of command line arguments for merged doctests)
- #131339 (Expand set_ptr_value / with_metadata_of docs)
- #131652 (Move polarity into `PolyTraitRef` rather than storing it on the side)
- #131675 (Update lint message for ABI not supported)
- #131681 (Fix up-to-date checking for run-make tests)
- #131702 (Suppress import errors for traits that couldve applied for method lookup error)
- #131703 (Resolved python deprecation warning in publish_toolstate.py)
- #131710 (Remove `'apostrophes'` from `rustc_parse_format`)
r? `@ghost`
`@rustbot` modify labels: rollup
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Add `&pin (mut|const) T` type position sugar
This adds parser support for `&pin mut T` and `&pin const T` references. These are desugared to `Pin<&mut T>` and `Pin<&T>` in the AST lowering phases.
This PR currently includes #130526 since that one is in the commit queue. Only the most recent commits (bd450027eb4a94b814a7dd9c0fa29102e6361149 and following) are new.
Tracking:
- #130494
r? `@compiler-errors`
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Add suggestion for removing invalid path sep `::` in fn def
Add suggestion for removing invalid path separator `::` in function definition.
for example: `fn invalid_path_separator::<T>() {}`
fixes #130791
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Retire the `unnamed_fields` feature for now
`#![feature(unnamed_fields)]` was implemented in part in #115131 and #115367, however work on that feature has (afaict) stalled and in the mean time there have been some concerns raised (e.g.[^1][^2]) about whether `unnamed_fields` is worthwhile to have in the language, especially in its current desugaring. Because it represents a compiler implementation burden including a new kind of anonymous ADT and additional complication to field selection, and is quite prone to bugs today, I'm choosing to remove the feature.
However, since I'm not one to really write a bunch of words, I'm specifically *not* going to de-RFC this feature. This PR essentially *rolls back* the state of this feature to "RFC accepted but not yet implemented"; however if anyone wants to formally unapprove the RFC from the t-lang side, then please be my guest. I'm just not totally willing to summarize the various language-facing reasons for why this feature is or is not worthwhile, since I'm coming from the compiler side mostly.
Fixes #117942
Fixes #121161
Fixes #121263
Fixes #121299
Fixes #121722
Fixes #121799
Fixes #126969
Fixes #131041
Tracking:
* https://github.com/rust-lang/rust/issues/49804
[^1]: https://rust-lang.zulipchat.com/#narrow/stream/213817-t-lang/topic/Unnamed.20struct.2Funion.20fields
[^2]: https://github.com/rust-lang/rust/issues/49804#issuecomment-1972619108
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codemountains:rename-nestedmetaitem-to-metaitemlnner, r=nnethercote
Rename `NestedMetaItem` to `MetaItemInner`
Fixes #131087
r? `@nnethercote`
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```
error: expected a pattern, found an expression
--> f889.rs:3:13
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3 | let (x, y.drop()) = (1, 2); //~ ERROR
| ^^^^^^^^ not a pattern
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= note: arbitrary expressions are not allowed in patterns: <https://doc.rust-lang.org/book/ch18-00-patterns.html>
error[E0532]: expected a pattern, found a function call
--> f889.rs:2:13
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2 | let (x, drop(y)) = (1, 2); //~ ERROR
| ^^^^ not a tuple struct or tuple variant
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= note: function calls are not allowed in patterns: <https://doc.rust-lang.org/book/ch18-00-patterns.html>
```
Fix #97200.
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Implement RFC3695 Allow boolean literals as cfg predicates
This PR implements https://github.com/rust-lang/rfcs/pull/3695: allow boolean literals as cfg predicates, i.e. `cfg(true)` and `cfg(false)`.
r? `@nnethercote` *(or anyone with parser knowledge)*
cc `@clubby789`
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Parser: better error messages for `@` in struct patterns
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for example: `fn invalid_path_separator::<T>() {}`
fixes: #130791
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Fix `break_last_token`.
It currently doesn't handle the three-char tokens `>>=` and `<<=` correctly. These can be broken twice, resulting in three individual tokens. This is a latent bug that currently doesn't cause any problems, but does cause problems for #124141, because that PR increases the usage of lazy token streams.
r? `@petrochenkov`
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It currently doesn't handle the three-char tokens `>>=` and `<<=`
correctly. These can be broken twice, resulting in three individual
tokens. This is a latent bug that currently doesn't cause any problems,
but does cause problems for #124141, because that PR increases the usage
of lazy token streams.
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