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9368: fix: Prefer identifier tokens in expand_macro r=Veykril a=Veykril
Fixes #9366
bors r+
Co-authored-by: Lukas Wirth <[email protected]>
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9367: Document perf characteristic of to_node r=matklad a=matklad
bors r+
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Co-authored-by: Aleksey Kladov <[email protected]>
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9348: output to log file if RA_LOG_FILE is defined in environment r=rezural a=rezural
This adds a check for RA_LOG_FILE, and logs to that if defined. It currently overrides flags.log_file. If this is undesirable, I will add a check.
Co-authored-by: rezural <[email protected]>
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9364: Split hover actions config into its own config struct r=Veykril a=Veykril
bors r+
Co-authored-by: Lukas Wirth <[email protected]>
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9363: Set explicit target directory to avoid cargo deadlock r=jonas-schievink a=oxalica
Fix #9360
r? @jonas-schievink
Co-authored-by: oxalica <[email protected]>
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9362: feature: massively improve performance for large files r=matklad a=matklad
bors r+
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Co-authored-by: Aleksey Kladov <[email protected]>
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This story begins in #8384, where we added a smart test for our syntax
highting, which run the algorithm on synthetic files of varying length
in order to guesstimate if the complexity is O(N^2) or O(N)-ish.
The test turned out to be pretty effective, and flagged #9031 as a
change that makes syntax highlighting accidentally quadratic. There was
much rejoicing, for the time being.
Then, lnicola asked an ominous question[1]: "Are we sure that the time
is linear right now?"
Of course it turned out that our sophisticated non-linearity detector
*was* broken, and that our syntax highlighting *was* quadratic.
Investigating that, many brave hearts dug deeper and deeper into the
guts of rust-analyzer, only to get lost in a maze of traits delegating
to traits delegating to macros.
Eventually, matklad managed to peel off all layers of abstraction one by
one, until almost nothing was left. In fact, the issue was discovered in
the very foundation of the rust-analyzer -- in the syntax trees.
Worse, it was not a new problem, but rather a well-know, well-understood
and event (almost) well-fixed (!) performance bug.
The problem lies within `SyntaxNodePtr` type -- a light-weight "address"
of a node in a syntax tree [3]. Such pointers are used by rust-analyzer all
other the place to record relationships between IR nodes and the
original syntax.
Internally, the pointer to a syntax node is represented by node's range.
To "dereference" the pointer, you traverse the syntax tree from the
root, looking for the node with the right range. The inner loop of this
search is finding a node's child whose range contains the specified
range. This inner loop was implemented by naive linear search over all
the children. For wide trees, dereferencing a single `SyntaxNodePtr` was
linear. The problem with wide trees though is that they contain a lot of
nodes! And dereferencing pointers to all the nodes is quadratic in the
size of the file!
The solution to this problem is to speed up the children search --
rather than doing a linear lookup, we can use binary search to locate
the child with the desired interval.
Doing this optimization was one of the motivations (or rather, side
effects) of #6857. That's why `rowan` grew the useful
`child_or_token_at_range` method which does exactly this binary search.
But looks like we've never actually switch to this method? Oups.
Lesson learned: do not leave broken windows in the fundamental infra.
Otherwise, you'll have to repeatedly re-investigate the issue, by
digging from the top of the Everest down to the foundation!
[1]: https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/.60syntax_highlighting_not_quadratic.60.20failure/near/240811501
[2]: https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/Syntax.20highlighting.20is.20quadratic
[3]: https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer/topic/Syntax.20highlighting.20is.20quadratic/near/243412392
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The completion of cfg will look at the enabled cfg keys when
performing completion.
It will also look crate features when completing a feature cfg
option. A fixed list of known values for some cfg options are
provided.
For unknown keys it will look at the enabled values for that cfg key,
which means that completion will only show enabled options for those.
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9165: Apply some clippy suggestions r=matklad a=clemenswasser
Co-authored-by: Clemens Wasser <[email protected]>
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9264: feat: Make documentation on hover configurable r=Veykril a=Veykril
This also implements deprecation support for config options as this renames `hoverActions_linksInHover` to `hover_linksInHover`.
Fixes #9232
Co-authored-by: Lukas Wirth <[email protected]>
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9314: Fix extract_function with await r=sasurau4 a=sasurau4
Fix #9287
Co-authored-by: Daiki Ihara <[email protected]>
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9227: Add a config setting to disable the 'test' cfg in specified crates r=matklad a=lf-
If you are opening libcore from rust-lang/rust as opposed to e.g.
goto definition from some other crate which would use the sysroot
instance of libcore, a `#![cfg(not(test))]` would previously have made
all the code excluded from the module tree, breaking the editor
experience.
Core does not need to ever be edited with `#[cfg(test)]` enabled,
as the tests are in another crate.
This PR puts in a slight hack that checks for the crate name "core" and
turns off `#[cfg(test)]` for that crate.
Fixes #9203
Fixes #9226
Co-authored-by: Jade <[email protected]>
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Fixes crates which vanish when the 'test' cfg atom is set.
Fix #7243.
Fix #9203.
Fix #7225.
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If you are opening libcore from rust-lang/rust as opposed to e.g.
goto definition from some other crate which would use the sysroot
instance of libcore, a `#![cfg(not(test))]` would previously have made
all the code excluded from the module tree, breaking the editor
experience.
This puts in a slight hack that checks for the crate name "core" and
turns off `#[cfg(test)]`.
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9356: internal: Move out and regroup more completion tests r=Veykril a=Veykril
bors r+
Co-authored-by: Lukas Wirth <[email protected]>
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9344: fix: rename works when invoked on a reference r=matklad a=matklad
bors r+
🤖
Co-authored-by: Aleksey Kladov <[email protected]>
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9328: internal: Update deps r=lnicola a=kjeremy
Co-authored-by: kjeremy <[email protected]>
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9338: minor: use minicore r=matklad a=matklad
bors r+
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Co-authored-by: Aleksey Kladov <[email protected]>
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