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/*
* Copyright 2022 Google LLC
* Copyright 2010-2022 JetBrains s.r.o. and Kotlin Programming Language contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
@file:Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER")
package com.google.devtools.ksp.impl.symbol.kotlin
import com.google.devtools.ksp.KSObjectCache
import com.google.devtools.ksp.processing.impl.KSNameImpl
import com.google.devtools.ksp.symbol.*
import com.intellij.psi.PsiClass
import org.jetbrains.kotlin.analysis.api.fir.symbols.KtFirFunctionSymbol
import org.jetbrains.kotlin.analysis.api.symbols.*
import org.jetbrains.kotlin.analysis.api.symbols.markers.KtSymbolKind
import org.jetbrains.kotlin.descriptors.Modality
import org.jetbrains.kotlin.fir.java.declarations.FirJavaClass
import org.jetbrains.kotlin.fir.java.declarations.FirJavaMethod
import org.jetbrains.kotlin.fir.java.resolveIfJavaType
import org.jetbrains.kotlin.fir.resolve.getContainingClass
import org.jetbrains.kotlin.fir.symbols.SymbolInternals
import org.jetbrains.kotlin.psi.KtDeclaration
import org.jetbrains.kotlin.psi.KtFunction
class KSFunctionDeclarationImpl private constructor(internal val ktFunctionSymbol: KtFunctionLikeSymbol) :
KSFunctionDeclaration,
AbstractKSDeclarationImpl(ktFunctionSymbol),
KSExpectActual by KSExpectActualImpl(ktFunctionSymbol) {
companion object : KSObjectCache<KtFunctionLikeSymbol, KSFunctionDeclarationImpl>() {
fun getCached(ktFunctionSymbol: KtFunctionLikeSymbol) =
cache.getOrPut(ktFunctionSymbol) { KSFunctionDeclarationImpl(ktFunctionSymbol) }
}
override val functionKind: FunctionKind by lazy {
when (ktFunctionSymbol.symbolKind) {
KtSymbolKind.CLASS_MEMBER -> FunctionKind.MEMBER
KtSymbolKind.TOP_LEVEL -> FunctionKind.TOP_LEVEL
KtSymbolKind.SAM_CONSTRUCTOR -> FunctionKind.LAMBDA
else -> throw IllegalStateException("Unexpected symbol kind ${ktFunctionSymbol.symbolKind}")
}
}
override val isAbstract: Boolean by lazy {
(ktFunctionSymbol as? KtFunctionSymbol)?.modality == Modality.ABSTRACT
}
override val extensionReceiver: KSTypeReference? by lazy {
analyze {
if (!ktFunctionSymbol.isExtension) {
null
} else {
ktFunctionSymbol.receiverType?.let {
KSTypeReferenceImpl.getCached(it, this@KSFunctionDeclarationImpl)
}
}
}
}
@OptIn(SymbolInternals::class)
override val returnType: KSTypeReference? by lazy {
// FIXME: temporary workaround before upstream fixes java type refs.
if (origin == Origin.JAVA) {
if (ktFunctionSymbol is KtFirFunctionSymbol) {
(ktFunctionSymbol.firSymbol.fir as? FirJavaMethod)?.also {
it.returnTypeRef = it.returnTypeRef.resolveIfJavaType(
it.moduleData.session,
(it.getContainingClass(it.moduleData.session) as FirJavaClass).javaTypeParameterStack
)
}
}
}
analyze {
// Constructors
if (ktFunctionSymbol is KtConstructorSymbol) {
((parentDeclaration as KSClassDeclaration).asStarProjectedType() as KSTypeImpl).type
} else {
ktFunctionSymbol.returnType
}.let { KSTypeReferenceImpl.getCached(it, this@KSFunctionDeclarationImpl) }
}
}
override val parameters: List<KSValueParameter> by lazy {
ktFunctionSymbol.valueParameters.map { KSValueParameterImpl.getCached(it, this) }
}
override fun findOverridee(): KSDeclaration? {
TODO("Not yet implemented")
}
override fun asMemberOf(containing: KSType): KSFunction {
TODO("Not yet implemented")
}
override val simpleName: KSName by lazy {
if (ktFunctionSymbol is KtFunctionSymbol) {
KSNameImpl.getCached(ktFunctionSymbol.name.asString())
} else {
KSNameImpl.getCached("<init>")
}
}
override val qualifiedName: KSName? by lazy {
KSNameImpl.getCached("${parentDeclaration?.qualifiedName?.asString()}.${this.simpleName.asString()}")
}
override fun <D, R> accept(visitor: KSVisitor<D, R>, data: D): R {
return visitor.visitFunctionDeclaration(this, data)
}
override val declarations: Sequence<KSDeclaration> by lazy {
val psi = ktFunctionSymbol.psi as? KtFunction ?: return@lazy emptySequence()
if (!psi.hasBlockBody()) {
emptySequence()
} else {
psi.bodyBlockExpression?.statements?.asSequence()?.filterIsInstance<KtDeclaration>()?.mapNotNull {
analyze {
it.getSymbol().toKSDeclaration()
}
} ?: emptySequence()
}
}
private fun isSyntheticConstructor(): Boolean {
return origin == Origin.SYNTHETIC ||
(origin == Origin.JAVA && ktFunctionSymbol.psi == null || ktFunctionSymbol.psi is PsiClass)
}
override fun toString(): String {
// TODO: fix origin for implicit Java constructor in AA
// TODO: should we change the toString() behavior for synthetic constructors?
return if (isSyntheticConstructor()) {
"synthetic constructor for ${this.parentDeclaration}"
} else {
this.simpleName.asString()
}
}
override val docString: String? by lazy {
if (isSyntheticConstructor()) {
parentDeclaration?.docString
} else {
super.docString
}
}
}
internal fun KtFunctionLikeSymbol.toModifiers(): Set<Modifier> {
val result = mutableSetOf<Modifier>()
if (this is KtFunctionSymbol) {
result.add(visibility.toModifier())
result.add(modality.toModifier())
if (isExternal) {
result.add(Modifier.EXTERNAL)
}
if (isInfix) {
result.add(Modifier.INFIX)
}
if (isInline) {
result.add(Modifier.INLINE)
}
if (isStatic) {
result.add(Modifier.JAVA_STATIC)
}
if (isSuspend) {
result.add(Modifier.SUSPEND)
}
if (isOperator) {
result.add(Modifier.OPERATOR)
}
if (isOperator) {
result.add(Modifier.OVERRIDE)
}
}
return result
}
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