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Part of #87059
Partially reverts #84703
Preview at: https://notriddle.com/notriddle-rustdoc-test/real-headers/std/index.html
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Per discussion in #84326. For trait implementations, this was
misleading: the items actually do have documentation (but it comes from
the trait definition).
For both trait implementations and trait implementors, this was
redundant: in both of those cases, the items are default-hidden by
different toggle at the level above.
Update tests: Remove XPath selectors that over-specified on details tag,
in cases that weren't testing toggles. Add an explicit test for toggles
on methods. Rename item-hide-threshold to toggle-item-contents for
consistency.
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This is step 2 towards fixing #77548.
In the codegen and codegen-units test suites, the `//` comment markers
were kept in order not to affect any source locations. This is because
these tests cannot be automatically `--bless`ed.
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Fixes issue #82920
Even if an item does not change between compilation sessions, it may end
up with a different `DefId`, since inserting/deleting an item affects
the `DefId`s of all subsequent items. Therefore, we use a `DefPathHash`
in the incremental compilation system, which is stable in the face of
changes to unrelated items.
In particular, the query system will consider the inputs to a query to
be unchanged if any `DefId`s in the inputs have their `DefPathHash`es
unchanged. Queries are pure functions, so the query result should be
unchanged if the query inputs are unchanged.
Unfortunately, it's possible to inadvertantly make a query result
incorrectly change across compilations, by relying on the specific value
of a `DefId`. Specifically, if the query result is a slice that gets
sorted by `DefId`, the precise order will depend on how the `DefId`s got
assigned in a particular compilation session. If some definitions end up
with different `DefId`s (but the same `DefPathHash`es) in a subsequent
compilation session, we will end up re-computing a *different* value for
the query, even though the query system expects the result to unchanged
due to the unchanged inputs.
It turns out that we have been sorting the predicates computed during
`astconv` by their `DefId`. These predicates make their way into the
`super_predicates_that_define_assoc_type`, which ends up getting used to
compute the vtables of trait objects. This, re-ordering these predicates
between compilation sessions can lead to undefined behavior at runtime -
the query system will re-use code built with a *differently ordered*
vtable, resulting in the wrong method being invoked at runtime.
This PR avoids sorting by `DefId` in `astconv`, fixing the
miscompilation. However, it's possible that other instances of this
issue exist - they could also be easily introduced in the future.
To fully fix this issue, we should
1. Turn on `-Z incremental-verify-ich` by default. This will cause the
compiler to ICE whenver an 'unchanged' query result changes between
compilation sessions, instead of causing a miscompilation.
2. Remove the `Ord` impls for `CrateNum` and `DefId`. This will make it
difficult to introduce ICEs in the first place.
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Fixes #68690
When we generate the proc macro harness, we now explicitly recorder the
order in which we generate entries. We then use this ordering data to
deserialize the correct proc-macro-data from the crate metadata.
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Rustdoc render async function re-export
Closes #63710
r? @nikomatsakis
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This ensures that we match the order used by proc macro metadata
serialization.
Fixes #64251
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Hide trait default methods
Fixes #62499.
However, the question remains: do we want to extend it to this point or not?
r? @QuietMisdreavus
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Improve Rustdoc's handling of procedural macros
Fixes #58700
Fixes #58696
Fixes #49553
Fixes #52210
This commit removes the special rustdoc handling for proc macros, as we can now
retrieve their span and attributes just like any other item.
A new command-line option is added to rustdoc: `--crate-type`. This takes the same options as rustc's `--crate-type` option. However, all values other than `proc-macro` are treated the same. This allows Rustdoc to enable 'proc macro mode' when handling a proc macro crate.
In compiletest, a new 'rustdoc-flags' option is added. This allows us to
pass in the '--proc-macro-crate' flag in the absence of Cargo.
I've opened [an additional PR to Cargo](https://github.com/rust-lang/cargo/pull/7159) to support passing in this flag.
These two PRS can be merged in any order - the Cargo changes will not
take effect until the 'cargo' submodule is updated in this repository.
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Fixes #58700
Fixes #58696
Fixes #49553
Fixes #52210
This commit removes the special rustdoc handling for proc macros, as we
can now
retrieve their span and attributes just like any other item.
A new command-line option is added to rustdoc: `--crate-type`. This
takes the same options as rustc's `--crate-type` option. However, all
values other than `proc-macro` are treated the same. This allows Rustdoc
to enable 'proc macro mode' when handling a proc macro crate.
In compiletest, a new 'rustdoc-flags' option is added. This allows us to
pass in the '--proc-macro-crate' flag in the absence of Cargo.
I've opened [an additional PR to
Cargo](https://github.com/rust-lang/cargo/pull/7159) to support passing
in this flag.
These two PRS can be merged in any order - the Cargo changes will not
take effect until the 'cargo' submodule is updated in this repository.
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Split off from #62855
Currently, rustdoc ignores any doc comments found on 'pub use'
statements. As described in issue #58700, this makes it impossible to
properly document procedural macros. Any doc comments must be written on
the procedural macro definition, which must occur in a dedicated
proc-macro crate. This means that any doc comments or doc tests cannot
reference items defined in re-exporting crate, despite the fact that
such items may be required to use the procedural macro.
To solve this issue, this commit allows doc comments to be written on
'pub use' statements. For consistency, this applies to *all* 'pub use'
statements, not just those importing procedural macros.
When inlining documentation, documentation on 'pub use' statements will
be prepended to the documentation of the inlined item. For example,
the following items:
```rust
mod other_mod {
/// Doc comment from definition
pub struct MyStruct;
}
/// Doc comment from 'pub use'
///
pub use other_mod::MyStruct;
```
will caues the documentation for the re-export of 'MyStruct' to be
rendered as:
```
Doc comment from 'pub use'
Doc comment from definition
```
Note the empty line in the 'pub use' doc comments - because doc comments
are concatenated as-is, this ensure that the doc comments on the
definition start on a new line.
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The dyn keyword has been stable for a while now so rustdoc should start using it.
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Fix spelling in the documentation to htmldocck.py
I was reading through htmldocck.py, and decided to attempt to clean it up a little bit. Let me know if you disagree with my edits.
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There was an issue (#33025) which caused these tests to not work. The issue has
since been fixed in #33133, and so we can now include them.
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rustdoc: Populate external_traits with traits only seen in impls
This means default methods can always be found and "Important traits" will include all spotlight traits.
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This means default methods can always be found and "Important traits" will include all spotlight traits.
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* Visibility was missing from impl items.
* Attributes and docs were missing from consts and types in impls.
* Const default values were missing from traits.
This unifies the code that handles associated items from impls and traits.
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