org.jetbrains.kotlin.fir.scopes.impl.AbstractFirUseSiteMemberScope.kt Maven / Gradle / Ivy
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/*
* Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.fir.scopes.impl
import org.jetbrains.kotlin.fir.FirSession
import org.jetbrains.kotlin.fir.declarations.utils.isStatic
import org.jetbrains.kotlin.fir.resolve.substitution.ConeSubstitutor
import org.jetbrains.kotlin.fir.scopes.*
import org.jetbrains.kotlin.fir.scopes.impl.FirTypeIntersectionScopeContext.ResultOfIntersection
import org.jetbrains.kotlin.fir.symbols.ConeClassLikeLookupTag
import org.jetbrains.kotlin.fir.symbols.impl.*
import org.jetbrains.kotlin.fir.types.ConeSimpleKotlinType
import org.jetbrains.kotlin.name.Name
abstract class AbstractFirUseSiteMemberScope(
val ownerClassLookupTag: ConeClassLikeLookupTag,
session: FirSession,
overrideCheckerForBaseClass: FirOverrideChecker,
// null means "use overrideCheckerForBaseClass"
overrideCheckerForIntersection: FirOverrideChecker?,
protected val superTypeScopes: List,
dispatchReceiverType: ConeSimpleKotlinType,
protected val declaredMemberScope: FirContainingNamesAwareScope
) : AbstractFirOverrideScope(session, overrideCheckerForBaseClass) {
protected val supertypeScopeContext = FirTypeIntersectionScopeContext(
session,
overrideCheckerForIntersection ?: overrideCheckerForBaseClass,
superTypeScopes, dispatchReceiverType, forClassUseSiteScope = true
)
private val functions: MutableMap> = hashMapOf()
private val properties: MutableMap>> = hashMapOf()
protected val directOverriddenFunctions: MutableMap>> =
hashMapOf()
protected val directOverriddenProperties: MutableMap>> = hashMapOf()
protected val functionsFromSupertypes: MutableMap>> = mutableMapOf()
protected val propertiesFromSupertypes: MutableMap>> = mutableMapOf()
protected val fieldsFromSupertypes: MutableMap> = mutableMapOf()
private val callableNamesCached by lazy(LazyThreadSafetyMode.PUBLICATION) {
buildSet {
addAll(declaredMemberScope.getCallableNames())
superTypeScopes.flatMapTo(this) { it.getCallableNames() }
}
}
private val classifierNamesCached by lazy(LazyThreadSafetyMode.PUBLICATION) {
buildSet {
addAll(declaredMemberScope.getClassifierNames())
superTypeScopes.flatMapTo(this) { it.getClassifierNames() }
}
}
final override fun processFunctionsByName(name: Name, processor: (FirNamedFunctionSymbol) -> Unit) {
// Important optimization: avoid creating cache keys for names that are definitely absent
if (name !in getCallableNames()) return
functions.getOrPut(name) {
collectFunctions(name)
}.forEach {
processor(it)
}
}
protected open fun collectFunctions(
name: Name
): Collection = mutableListOf().apply {
collectDeclaredFunctions(name, this)
val explicitlyDeclaredFunctions = this.toSet()
collectFunctionsFromSupertypes(name, this, explicitlyDeclaredFunctions)
}
protected fun collectDeclaredFunctions(name: Name, destination: MutableList) {
declaredMemberScope.processFunctionsByName(name) { symbol ->
if (symbol.isStatic) return@processFunctionsByName
if (!symbol.isVisibleInCurrentClass()) return@processFunctionsByName
val directOverridden = computeDirectOverriddenForDeclaredFunction(symbol)
directOverriddenFunctions[symbol] = directOverridden
destination += symbol.replaceWithWrapperSymbolIfNeeded()
}
}
protected abstract fun FirNamedFunctionSymbol.isVisibleInCurrentClass(): Boolean
private fun FirCallableSymbol<*>.isInvisible(): Boolean {
return this is FirNamedFunctionSymbol && !isVisibleInCurrentClass()
}
protected fun collectFunctionsFromSupertypes(
name: Name,
destination: MutableList,
explicitlyDeclaredFunctions: Set
) {
for (resultOfIntersection in getFunctionsFromSupertypesByName(name)) {
resultOfIntersection.collectNonOverriddenDeclarations(explicitlyDeclaredFunctions, destination)
}
}
/**
* If the receiver [ResultOfIntersection] is not overridden by any symbol in [explicitlyDeclared],
* adds its [ResultOfIntersection.chosenSymbol] to [destination].
*
* If the [ResultOfIntersection] is [ResultOfIntersection.NonTrivial] and only some of the intersected symbols are overridden,
* constructs a new [ResultOfIntersection] consisting of the non-overridden symbols and adds its [ResultOfIntersection.chosenSymbol]
* to [destination].
*
* It's the opposite operation of [collectDirectOverriddenForDeclared].
*/
protected fun > ResultOfIntersection.collectNonOverriddenDeclarations(
explicitlyDeclared: Set>,
destination: MutableList,
) {
when (this) {
is ResultOfIntersection.SingleMember -> {
val chosenSymbol = chosenSymbol
if (chosenSymbol.isInvisible()) return
val overriddenBy = chosenSymbol.getOverridden(explicitlyDeclared)
if (overriddenBy == null) {
destination += chosenSymbol
}
}
is ResultOfIntersection.NonTrivial -> {
// For non-trivial intersections, some of the intersected symbols can be overridden and some not.
val (visibleNotOverridden, overriddenOrInvisible) = overriddenMembers
.partition { !it.member.isInvisible() && it.member.getOverridden(explicitlyDeclared) == null }
if (overriddenOrInvisible.isEmpty()) {
// Case 1: all intersected symbols are overridden.
destination += chosenSymbol
} else if (visibleNotOverridden.isNotEmpty()) {
// Case 2: some intersected symbols are overridden.
// Create a new ResultOfIntersection from the non-overridden and add it to destination.
destination += supertypeScopeContext
.convertGroupedCallablesToIntersectionResults(visibleNotOverridden.map { it.baseScope to listOf(it.member) })
.map { it.chosenSymbol }
}
// Case 3: all are overridden. Don't add anything to destination.
}
}
}
private fun getFunctionsFromSupertypesByName(name: Name): List> {
return functionsFromSupertypes.getOrPut(name) {
supertypeScopeContext.collectIntersectionResultsForCallables(name, FirScope::processFunctionsByName)
}
}
final override fun processPropertiesByName(name: Name, processor: (FirVariableSymbol<*>) -> Unit) {
// Important optimization: avoid creating cache keys for names that are definitely absent
if (name !in getCallableNames()) return
properties.getOrPut(name) {
collectProperties(name)
}.forEach {
processor(it)
}
}
protected abstract fun collectProperties(name: Name): Collection>
private fun computeDirectOverriddenForDeclaredFunction(declaredFunctionSymbol: FirNamedFunctionSymbol): List> {
val result = mutableListOf>()
for (resultOfIntersection in getFunctionsFromSupertypesByName(declaredFunctionSymbol.name)) {
resultOfIntersection.collectDirectOverriddenForDeclared(declaredFunctionSymbol, result, overrideChecker::isOverriddenFunction)
}
return result
}
/**
* If [declared] overrides the receiver [ResultOfIntersection], adds it to [result].
* If the [ResultOfIntersection] is [ResultOfIntersection.NonTrivial] and [declared] only overrides some of the intersected symbols,
* a new [ResultOfIntersection] is constructed containing only the overridden symbols.
*
* Opposite operation to [collectNonOverriddenDeclarations].
*/
protected inline fun > ResultOfIntersection.collectDirectOverriddenForDeclared(
declared: T,
result: MutableList>,
isOverridden: (T, T) -> Boolean,
) {
when (this) {
is ResultOfIntersection.SingleMember -> {
val symbolFromSupertype = chosenSymbol
if (isOverridden(declared, symbolFromSupertype)) {
result.add(this)
}
}
is ResultOfIntersection.NonTrivial -> {
// For non-trivial intersections, declared can override a subset of the intersected symbols.
val (overridden, nonOverridden) = overriddenMembers.partition {
isOverridden(declared, it.member)
}
if (nonOverridden.isEmpty()) {
// Case 1: all intersected symbols are overridden
result += this
} else if (overridden.isNotEmpty()) {
// Case 2: some intersected symbols are overridden.
// Create a new ResultOfIntersection from the overridden symbols and add it to result.
result += supertypeScopeContext.convertGroupedCallablesToIntersectionResults(overridden.map { it.baseScope to listOf(it.member) })
}
// Case 3: No intersected symbols are overridden. Don't add anything to result.
}
}
}
override fun processDirectOverriddenFunctionsWithBaseScope(
functionSymbol: FirNamedFunctionSymbol,
processor: (FirNamedFunctionSymbol, FirTypeScope) -> ProcessorAction
): ProcessorAction {
return processDirectOverriddenMembersWithBaseScopeImpl(
directOverriddenFunctions,
functionsFromSupertypes,
functionSymbol,
processor
)
}
override fun processDirectOverriddenPropertiesWithBaseScope(
propertySymbol: FirPropertySymbol,
processor: (FirPropertySymbol, FirTypeScope) -> ProcessorAction
): ProcessorAction {
return processDirectOverriddenMembersWithBaseScopeImpl(
directOverriddenProperties,
propertiesFromSupertypes,
propertySymbol,
processor
)
}
private fun > processDirectOverriddenMembersWithBaseScopeImpl(
directOverriddenMap: Map>>,
callablesFromSupertypes: Map>>,
callableSymbol: D,
processor: (D, FirTypeScope) -> ProcessorAction
): ProcessorAction {
when (val directOverridden = directOverriddenMap[callableSymbol]) {
null -> {
val resultOfIntersection = callablesFromSupertypes[callableSymbol.name]
?.firstOrNull { it.chosenSymbol == callableSymbol }
?: return ProcessorAction.NONE
for ((overridden, baseScope) in resultOfIntersection.overriddenMembers) {
if (!processor(overridden, baseScope)) return ProcessorAction.STOP
}
return ProcessorAction.NONE
}
else -> {
for (resultOfIntersection in directOverridden) {
for ((overridden, baseScope) in resultOfIntersection.overriddenMembers) {
if (!processor(overridden, baseScope)) return ProcessorAction.STOP
}
}
return ProcessorAction.NONE
}
}
}
override fun processClassifiersByNameWithSubstitution(name: Name, processor: (FirClassifierSymbol<*>, ConeSubstitutor) -> Unit) {
// Important optimization: avoid creating cache keys for names that are definitely absent
if (name !in getClassifierNames()) return
var shadowed = false
declaredMemberScope.processClassifiersByNameWithSubstitution(name) { classifier, substitutor ->
shadowed = true
processor(classifier, substitutor)
}
if (!shadowed) {
supertypeScopeContext.processClassifiersByNameWithSubstitution(name, processor)
}
}
override fun processDeclaredConstructors(processor: (FirConstructorSymbol) -> Unit) {
declaredMemberScope.processDeclaredConstructors(processor)
}
override fun getCallableNames(): Set {
return callableNamesCached
}
override fun getClassifierNames(): Set {
return classifierNamesCached
}
/**
* This function is currently used only for creating suspend views in Java.
*/
protected open fun FirNamedFunctionSymbol.replaceWithWrapperSymbolIfNeeded(): FirNamedFunctionSymbol {
return this
}
}