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previously, this lint did not distinguish between `<img` and `<img>`,
and since the latter should be accepted under html5,
the former was also accepted.
the parser now also handles multi-line tags and multi-line attributes.
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from expansion
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1. rustdoc::bare_urls doesn't output
invalid suggestions if source_span_for_markdown_range
fails to find a span
2. source_span_for_markdown_range tries harder to
return a span by applying an additional diagnostic
fixes https://github.com/rust-lang/rust/issues/135851
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Follow up https://github.com/rust-lang/rust/pull/127127
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And pass this to the individual emitters when necessary.
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It's simpler and more concise.
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This is a bit of an experiment to see if it improves perf.
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The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
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Tweak some structured suggestions to be more verbose and accurate
Addressing some issues I found while working on #127282.
```
error: this URL is not a hyperlink
--> $DIR/auxiliary/include-str-bare-urls.md:1:11
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LL | HEADS UP! https://example.com MUST SHOW UP IN THE STDERR FILE!
| ^^^^^^^^^^^^^^^^^^^
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= note: bare URLs are not automatically turned into clickable links
note: the lint level is defined here
--> $DIR/include-str-bare-urls.rs:14:9
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LL | #![deny(rustdoc::bare_urls)]
| ^^^^^^^^^^^^^^^^^^
help: use an automatic link instead
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LL | HEADS UP! <https://example.com> MUST SHOW UP IN THE STDERR FILE!
| + +
```
```
error[E0384]: cannot assign twice to immutable variable `v`
--> $DIR/assign-imm-local-twice.rs:7:5
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LL | v = 1;
| ----- first assignment to `v`
LL | println!("v={}", v);
LL | v = 2;
| ^^^^^ cannot assign twice to immutable variable
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help: consider making this binding mutable
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LL | let mut v: isize;
| +++
```
```
error[E0393]: the type parameter `Rhs` must be explicitly specified
--> $DIR/issue-22560.rs:9:23
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LL | trait Sub<Rhs=Self> {
| ------------------- type parameter `Rhs` must be specified for this
...
LL | type Test = dyn Add + Sub;
| ^^^
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= note: because of the default `Self` reference, type parameters must be specified on object types
help: set the type parameter to the desired type
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LL | type Test = dyn Add + Sub<Rhs>;
| +++++
```
```
error[E0596]: cannot borrow `v` as mutable, as it is not declared as mutable
--> $DIR/issue-33819.rs:4:34
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LL | Some(ref v) => { let a = &mut v; },
| ^^^^^^ cannot borrow as mutable
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help: try removing `&mut` here
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LL - Some(ref v) => { let a = &mut v; },
LL + Some(ref v) => { let a = v; },
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```
```
help: remove the invocation before committing it to a version control system
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LL - dbg!();
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```
```
error[E0308]: mismatched types
--> $DIR/issue-39974.rs:1:21
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LL | const LENGTH: f64 = 2;
| ^ expected `f64`, found integer
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help: use a float literal
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LL | const LENGTH: f64 = 2.0;
| ++
```
```
error[E0529]: expected an array or slice, found `Vec<i32>`
--> $DIR/match-ergonomics.rs:8:9
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LL | [&v] => {},
| ^^^^ pattern cannot match with input type `Vec<i32>`
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help: consider slicing here
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LL | match x[..] {
| ++++
```
```
error[E0609]: no field `0` on type `[u32; 1]`
--> $DIR/parenthesized-deref-suggestion.rs:10:21
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LL | (x as [u32; 1]).0;
| ^ unknown field
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help: instead of using tuple indexing, use array indexing
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LL | (x as [u32; 1])[0];
| ~ +
```
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Use more accurate spans for multipart suggestion.
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Most modules have such a blank line, but some don't. Inserting the blank
line makes it clearer that the `//!` comments are describing the entire
module, rather than the `use` declaration(s) that immediately follows.
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Currently we have an awkward mix of fallible and infallible functions:
```
new_parser_from_source_str
maybe_new_parser_from_source_str
new_parser_from_file
(maybe_new_parser_from_file) // missing
(new_parser_from_source_file) // missing
maybe_new_parser_from_source_file
source_str_to_stream
maybe_source_file_to_stream
```
We could add the two missing functions, but instead this commit removes
of all the infallible ones and renames the fallible ones leaving us with
these which are all fallible:
```
new_parser_from_source_str
new_parser_from_file
new_parser_from_source_file
source_str_to_stream
source_file_to_stream
```
This requires making `unwrap_or_emit_fatal` public so callers of
formerly infallible functions can still work.
This does make some of the call sites slightly more verbose, but I think
it's worth it for the simpler API. Also, there are two `catch_unwind`
calls and one `catch_fatal_errors` call in this diff that become
removable thanks this change. (I will do that in a follow-up PR.)
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It's the only one of these functions where `psess` isn't the first
argument.
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Lexing converts source text into a token stream. Parsing converts a
token stream into AST fragments. This commit renames several lexing
operations that have "parse" in the name. I think these names have been
subtly confusing me for years.
This is just a `s/parse/lex/` on function names, with one exception:
`parse_stream_from_source_str` becomes `source_str_to_stream`, to make
it consistent with the existing `source_file_to_stream`. The commit also
moves that function's location in the file to be just above
`source_file_to_stream`.
The commit also cleans up a few comments along the way.
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GuillaumeGomez:stabilize-custom_code_classes_in_docs, r=rustdoc
Stabilize `custom_code_classes_in_docs` feature
Fixes #79483.
This feature has been around for quite some time now, I think it's fine to stabilize it now.
## Summary
## What is the feature about?
In short, this PR changes two things, both related to codeblocks in doc comments in Rust documentation:
* Allow to disable generation of `language-*` CSS classes with the `custom` attribute.
* Add your own CSS classes to a code block so that you can use other tools to highlight them.
#### The `custom` attribute
Let's start with the new `custom` attribute: it will disable the generation of the `language-*` CSS class on the generated HTML code block. For example:
```rust
/// ```custom,c
/// int main(void) {
/// return 0;
/// }
/// ```
```
The generated HTML code block will not have `class="language-c"` because the `custom` attribute has been set. The `custom` attribute becomes especially useful with the other thing added by this feature: adding your own CSS classes.
#### Adding your own CSS classes
The second part of this feature is to allow users to add CSS classes themselves so that they can then add a JS library which will do it (like `highlight.js` or `prism.js`), allowing to support highlighting for other languages than Rust without increasing burden on rustdoc. To disable the automatic `language-*` CSS class generation, you need to use the `custom` attribute as well.
This allow users to write the following:
```rust
/// Some code block with `{class=language-c}` as the language string.
///
/// ```custom,{class=language-c}
/// int main(void) {
/// return 0;
/// }
/// ```
fn main() {}
```
This will notably produce the following HTML:
```html
<pre class="language-c">
int main(void) {
return 0;
}</pre>
```
Instead of:
```html
<pre class="rust rust-example-rendered">
<span class="ident">int</span> <span class="ident">main</span>(<span class="ident">void</span>) {
<span class="kw">return</span> <span class="number">0</span>;
}
</pre>
```
To be noted, we could have written `{.language-c}` to achieve the same result. `.` and `class=` have the same effect.
One last syntax point: content between parens (`(like this)`) is now considered as comment and is not taken into account at all.
In addition to this, I added an `unknown` field into `LangString` (the parsed code block "attribute") because of cases like this:
```rust
/// ```custom,class:language-c
/// main;
/// ```
pub fn foo() {}
```
Without this `unknown` field, it would generate in the DOM: `<pre class="language-class:language-c language-c">`, which is quite bad. So instead, it now stores all unknown tags into the `unknown` field and use the first one as "language". So in this case, since there is no unknown tag, it'll simply generate `<pre class="language-c">`. I added tests to cover this.
EDIT(camelid): This description is out-of-date. Using `custom,class:language-c` will generate the output `<pre class="language-class:language-c">` as would be expected; it treats `class:language-c` as just the name of a language (similar to the langstring `c` or `js` or what have you) since it does not use the designed class syntax.
Finally, I added a parser for the codeblock attributes to make it much easier to maintain. It'll be pretty easy to extend.
As to why this syntax for adding attributes was picked: it's [Pandoc's syntax](https://pandoc.org/MANUAL.html#extension-fenced_code_attributes). Even if it seems clunkier in some cases, it's extensible, and most third-party Markdown renderers are smart enough to ignore Pandoc's brace-delimited attributes (from [this comment](https://github.com/rust-lang/rust/pull/110800#issuecomment-1522044456)).
r? `@notriddle`
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* instead simply set the primary message inside the lint decorator functions
* it used to be this way before [#]101986 which introduced `msg` to prevent
good path delayed bugs (which no longer exist) from firing under certain
circumstances when lints were suppressed / silenced
* this is no longer necessary for various reasons I presume
* it shaves off complexity and makes further changes easier to implement
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Fixes a regression caused by 0a50dba50bedd24377bd1066da3b4b7066df4d28
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Existing names for values of this type are `sess`, `parse_sess`,
`parse_session`, and `ps`. `sess` is particularly annoying because
that's also used for `Session` values, which are often co-located, and
it can be difficult to know which type a value named `sess` refers to.
(That annoyance is the main motivation for this change.) `psess` is nice
and short, which is good for a name used this much.
The commit also renames some `parse_sess_created` values as
`psess_created`.
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Because it's now the only constructor.
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Much better!
Note that this involves renaming (and updating the value of)
`DIAGNOSTIC_BUILDER` in clippy.
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I started by changing it to `DiagData`, but that didn't feel right.
`DiagInner` felt much better.
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First, introduce a typedef `DiagnosticArgMap`.
Second, make the `args` field public, and remove the `args` getter and
`replace_args` setter. These were necessary previously because the getter
had a `#[allow(rustc::potential_query_instability)]` attribute, but that
was removed in #120931 when the args were changed from `FxHashMap` to
`FxIndexMap`. (All the other `Diagnostic` fields are public.)
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All the other `emit`/`emit_diagnostic` methods were recently made
consuming (e.g. #119606), but this one wasn't. But it makes sense to.
Much of this is straightforward, and lots of `clone` calls are avoided.
There are a couple of tricky bits.
- `Emitter::primary_span_formatted` no longer takes a `Diagnostic` and
returns a pair. Instead it takes the two fields from `Diagnostic` that
it used (`span` and `suggestions`) as `&mut`, and modifies them. This
is necessary to avoid the cloning of `diag.children` in two emitters.
- `from_errors_diagnostic` is rearranged so various uses of `diag` occur
before the consuming `emit_diagnostic` call.
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In the past it did create a fresh expansion, but now, after surviving a number of refactorings, it does not.
Now it's just a thin wrapper around `apply_mark`.
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librustdoc: fix typos
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Lots of vectors of messages called `message` or `msg`. This commit
pluralizes them.
Note that `emit_message_default` and `emit_messages_default` both
already existed, and both process a vector, so I renamed the former
`emit_messages_default_inner` because it's called by the latter.
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