Using of Kotlin reflection for simple operations like bean management is very slow
First time initialization time: 261 ms for `copyBean(K2JVMCompilerArguments())`
Subsequent calls of `copyBean(K2JVMCompilerArguments())` take 1.7 ms per call
Unfortunately compiler argument handling is also used in Kotlin IntelliJ plugin
to parse facet settings. Big projects may have thousands of Kotlin facets
The same `ArgumentUtilsKt.copyProperties` frame is seen across various freezes:
IDEA-252440 2-3 minutes freeze on Kotlin project reimporting in last 203 eap
IDEA-253107 A lot of short freezes (1-3 sec) during Kotlin project development
KTIJ-23501 Make main run configuration detection lighter
KTIJ-22435 Unresponsive UI with 100% cpu
Reflection issue:
KT-56358 KClasses.getMemberProperties takes too much time
This commit replaces all reflection stuff with a simple code generation
Now `K2JVMCompilerArguments().clone()` goes to hard-to-measure time
Such split allows to reuse default implementation for different
use-cases. Helpers, in this case, allows to do manipulations with
options where required.
^KT-57159 In Progress
There's no way for the end user to use this implementation anymore,
since old JVM backend cannot be enabled, and nothing else from Kotlin
depends on it.
Now all tests with `Fir` in name are named accordingly to parser which
is used in them -- `FirPsi` or `FirLightTree`. This is needed to keep
consistency between different types of tests, because there is no
single default in parser mode between different scenarios of using FIR
If you need to mute a test for Gradle IC, the only way is to add exclude pattern and regenerate tests aka remove unnecessary tests. But the filter is absolute, so if you have the same test name in different subfolders (e.g. `pureKotlin/classRemoved/` and `classHierarchyAffected/classRemoved`) you cannot disable only one of them. This commit adds logic to specify which name pattern in which subfolder should be excluded
For the following example, when we run the reference shortener, it
drops `a.b.c` qualifier, because it matches "FOURTH".
```
package a.b.c
fun <T, E, D> foo(a: T, b: E, c: D) = a.hashCode() + b.hashCode() + c.hashCode() // FIRST
fun <E> E.foo() = hashCode() // SECOND
object Receiver {
fun <T, E, D> foo(a: T, b: E, c: D) = a.hashCode() + b.hashCode() + c.hashCode() // THIRD
fun foo(a: Int, b: Boolean, c: String) = a.hashCode() + b.hashCode() + c.hashCode() // FOURTH
fun test(): Int {
fun foo(a: Int, b: Boolean, c: Int) = a + b.hashCode() + c // FIFTH
return <expr>a.b.c.foo(1, false, "bar")</expr>
}
}
```
As shown in the above example, when SHORTEN_IF_ALEADY_IMPORTED option is
given from a user, the reference shortener has to check whether it can
drop the qualifier without changing the referenced symbol and if it is
possible to do that without adding a new import directive, it deletes
the qualifier.
It needs two steps:
1. Collect all candidate symbols matching the signature e.g., function
arguments / type arguments
2. Determine whether the referenced symbol has the highest reference
priority when we drops the qualifier depending on scopes
This commit uses `AllCandidatesResolver(shorteningContext.analysisSession.useSiteSession).
getAllCandidates( .. fake FIR call/property-access ..)` for step1.
For step2, we use a heuristic based on scopes of candidates. If a
candidate symbol is under the same scope with the target expression, it
has a `FirLocalScope` which has the high priority. So when we have a
candidate under a `FirLocalScope` and the actual referenced symbol is
different from the candidate, we must avoid dropping its qualifier
because the shortening will change its semantics i.e., reference.
The order of scopes depending on their scope types is:
1. FirLocalScope
2. FirClassUseSiteMemberScope / FirNestedClassifierScope
3. FirExplicitSimpleImportingScope
4. FirPackageMemberScope
5. others
Note that for "others" the above rule can be wrong. Please update it if
you find other scopes that have a priority higher than the specified
scopes.
One of non-trivial parts is the priority among multiple
FirClassUseSiteMemberScope and FirNestedClassifierScope. They are
basically scopes for class declarations. We decide their priorities
based on the distance of class declaration from the target expression.
Note that we take a strict approach to reject all false positive. For
example, when we are not sure, we don't shorten it to avoid changing its
semantics.
TODO: One corner case is handling receivers. We have to update
```
private fun shortenIfAlreadyImported(
firQualifiedAccess: FirQualifiedAccess,
calledSymbol: FirCallableSymbol<*>,
expressionInScope: KtExpression,
): Boolean
```
The current implementation cannot handle the following example:
```
package foo
class Foo {
fun test() {
// It references FIRST. Removing `foo` lets it reference SECOND.
<caret>foo.myRun {
42
}
}
}
inline fun <R> myRun(block: () -> R): R = block() // FIRST
inline fun <T, R> T.myRun(block: T.() -> R): R = block() // SECOND
```
Tests related to TODO:
- analysis/analysis-api/testData/components/referenceShortener/referenceShortener/receiver2.kt
- analysis/analysis-api/testData/components/referenceShortener/referenceShortener/receiver3.kt
We can use less strict rule for produced annotations:
* Previously: the same annotations from `findAnnotation` and `annotations`
have the same identity
* Now: the same annotations from `findAnnotation` and `annotations`
are equals by 'equals'
^KT-56046
and assert that symbol is not a substitution/intersection override
in the `compute` method otherwise.
Because `fakeOverrideSubstitution` should be calculated for all real
implicit types, no call to this method should actually happen.
Otherwise, it can be problematic to create a session
which would contain the full designation path:
`provider.getFirCallableContainerFile(symbol)`
returns `firFile` of a super class which might be from module `a`,
when declaration and its outer classes are from module `b`.
^KTIJ-24105
If typealias is defined in a separate file, then after changing some base types, an incremental compilation of Kotlin could not find all affected files, because of lack of information, which it can not get on the class file analyzing phase. FIR provides a new approach to IC compilation: now we can run the frontend several times, which allows us to obtain all necessary information and use it to mark all affected files for recompilation.
Relates to KT-54991
#KT-28233 Fixed
Adds implementation and tests for the new
KtClassOrObjectSymbol.annotationApplicableTargets property on
KtSymbolInfoProvider. This implementation delegates to the canonical
implementation in AnnotationChecker for FE1.0, and to the implementation
in FirAnnotationHelpers for FIR.
This change also includes direct tests for annotationApplicableTargets,
and a fix for FirClassLikeSymbol.getAllowedAnnotationTargets in
FirAnnotationHelpers.
- `.ll.kt` test data can be added in cases where LL FIR resolution
legally diverges from K2 compiler results.
- Each `.ll.kt` test is prefixed with an `LL_FIR_DIVERGENCE` directive
which must explain why the test may diverge from K2 compiler results.
- `LLFirDivergenceCommentChecker` ensures that each `.ll.kt` file
contains an `LL_FIR_DIVERGENCE` directive.
- `LLFirIdenticalChecker` results in an assertion error if the `.ll.kt`
test and its base test are completely identical, including in their
meta info (but ignoring `LL_FIR_DIVERGENCE`).
- The checker additionally ensures that the base source file and the
`.ll.kt` source file have identical Kotlin source code (ignoring
meta info and `LL_FIR_DIVERGENCE`). This ensures that both tests
test the exact same thing.
- `.ll.kt` files are ignored by select test generators, in addition to
`.fir.kt` files.
This test ensures that annotations on other annotations are properly
handled, even if those annotations are defined in Java rather than in
Kotlin.
Note that this functionality only works on FIR, and currently has bugs
that mean the result is an error type. Follow-on changes will fix the
error-type bug, and restore proper functionality for FIR.
This will allow to keep backward compatiblity for deprecated
kotlinOptions DSL for already existing compiler arguments, but add a new
one only into compilerOptions DSL.
^KT-53108 In Progress
Previously, the `KtFirUsualClassType.qualifiers` was empty for the local classes
The reason was a RawFirBuilder setting up a containingClassForLocalAttr
to the outer non-local class for the local class. It should be a null instead,
see the localClassType.kt as an example
^KT-55510 fixed
otherwise references from java to ktElements won't be treated as references,
cause java references resolve to light elements and search can/should be called
on ktElements
It's the same logic that is used in generateTests, and it prevents
master builds from failing as soon as the new year begins. The year in
the COPYRIGHT_HEADER should be updated manually anyway, after which all
the generators will need to be re-run.
Sebastian Sellmair