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improvement: Rework IndexedContext to reuse the previously calculated scopes #22898

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@tgodzik tgodzik commented Apr 1, 2025

It turns out the work being done in IndexedContext was already done in Completions, but better, since it doesn't try to read files as the separate logic does.

There is still some improvement to be done to not calculate it twice, but in order to keep this PR as simple as possible I will skip that for now.

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som-snytt commented Apr 1, 2025

I wonder if this strategy helps #22430 (which I haven't returned to yet)

Edit: I guess only in the sense of "moral support".

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tgodzik commented Apr 1, 2025

I think I am actually doing it all wrong and might be possible that IndexedContext is not really needed 😅

@tgodzik tgodzik force-pushed the fix-slow branch 2 times, most recently from 3e69d9e to 21aa3b8 Compare April 3, 2025 18:27
@tgodzik tgodzik force-pushed the fix-slow branch 4 times, most recently from d27ca2c to 376f628 Compare April 16, 2025 20:05
@tgodzik tgodzik changed the title improvement: Look up isAccessible lazily improvement: Rework IndexedContext to reuse the previously calculated scopes Apr 16, 2025
… scopes

It turns out the work being done in IndexedContext was already done in Completions, but better, since it doesn't try to read files as the separate logic does.

There is still some improvement to be done to not calculate it twice, but in order to keep this PR as simple as possible I will skip that for now.
@@ -48,6 +48,16 @@ case class Completion(label: String, description: String, symbols: List[Symbol])

object Completion:

def scopeContext(pos: SourcePosition)(using Context): CompletionResult =
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Ideally this would get deduplicated with normal rawCompletions being invoked, but I will try to do it as a separate step afterwards.

@Test def `sealed-conflict` =
check(
"""
|object A {
| val e: Either[Int, String] = ???
| type Left = String
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type val actually fine here, but val causes an error

@@ -655,7 +655,7 @@ class InlayHintsSuite extends BaseInlayHintsSuite {
| val y/*: S<<scala/collection/Set#>>[Char<<scala/Char#>>]*/ = f
| ???
| }
| val x/*: AB<<scala/collection/AbstractMap#>>[Int<<scala/Int#>>, String<<scala/Predef.String#>>]*/ = test(Set/*[Int<<scala/Int#>>]*/(1), Set/*[Char<<scala/Char#>>]*/('a'))
| val x/*: AB<<scala/collection/AbstractMap#>>[Int<<scala/Int#>>, String<<java/lang/String#>>]*/ = test(Set/*[Int<<scala/Int#>>]*/(1), Set/*[Char<<scala/Char#>>]*/('a'))
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This was inconsistent previously

@tgodzik tgodzik requested review from rochala and kasiaMarek April 17, 2025 10:18
@tgodzik tgodzik marked this pull request as ready for review April 17, 2025 10:18
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2 participants