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// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package org.jetbrains.uast.kotlin
import com.intellij.psi.*
import com.intellij.psi.util.PsiTypesUtil
import org.jetbrains.annotations.ApiStatus
import org.jetbrains.kotlin.psi.*
import org.jetbrains.uast.*
import org.jetbrains.uast.internal.acceptList
import org.jetbrains.uast.kotlin.internal.TypedResolveResult
import org.jetbrains.uast.visitor.UastVisitor
@ApiStatus.Internal
class KotlinUFunctionCallExpression(
override val sourcePsi: KtCallElement,
givenParent: UElement?,
) : KotlinAbstractUExpression(givenParent), UCallExpression, KotlinUElementWithType, UMultiResolvable {
override val receiverType by lz {
baseResolveProviderService.getReceiverType(sourcePsi, this)
}
override val methodName by lz {
baseResolveProviderService.resolvedFunctionName(sourcePsi)
}
override val classReference: UReferenceExpression by lz {
KotlinClassViaConstructorUSimpleReferenceExpression(sourcePsi, methodName.orAnonymous("class"), this)
}
override val methodIdentifier: UIdentifier? by lz {
if (sourcePsi is KtSuperTypeCallEntry) {
((sourcePsi.parent as? KtInitializerList)?.parent as? KtEnumEntry)?.let { ktEnumEntry ->
return@lz KotlinUIdentifier(ktEnumEntry.nameIdentifier, this)
}
}
when (val calleeExpression = sourcePsi.calleeExpression) {
null -> null
is KtNameReferenceExpression ->
KotlinUIdentifier(calleeExpression.getReferencedNameElement(), this)
is KtConstructorDelegationReferenceExpression ->
KotlinUIdentifier(calleeExpression.firstChild ?: calleeExpression, this)
is KtConstructorCalleeExpression -> {
val referencedNameElement = calleeExpression.constructorReferenceExpression?.getReferencedNameElement()
if (referencedNameElement != null) KotlinUIdentifier(referencedNameElement, this)
else generateSequence<PsiElement>(calleeExpression) { it.firstChild?.takeIf { it.nextSibling == null } }
.lastOrNull()
?.takeIf { it.firstChild == null }
?.let { KotlinUIdentifier(it, this) }
}
is KtLambdaExpression ->
KotlinUIdentifier(calleeExpression.functionLiteral.lBrace, this)
else ->
KotlinUIdentifier(
sourcePsi.valueArgumentList?.leftParenthesis
?: sourcePsi.lambdaArguments.singleOrNull()?.getLambdaExpression()?.functionLiteral?.lBrace
?: calleeExpression, this
)
}
}
override val valueArgumentCount: Int
get() = sourcePsi.valueArguments.size
override val valueArguments by lz {
sourcePsi.valueArguments.map {
baseResolveProviderService.baseKotlinConverter.convertOrEmpty(it.getArgumentExpression(), this)
}
}
override fun getArgumentForParameter(i: Int): UExpression? {
val resolvedCall = baseResolveProviderService.resolveCall(sourcePsi)
if (resolvedCall != null) {
val actualParamIndex = if (baseResolveProviderService.isResolvedToExtension(sourcePsi)) i - 1 else i
if (actualParamIndex == -1) return receiver
return baseResolveProviderService.getArgumentForParameter(sourcePsi, actualParamIndex, this)
}
val argument = valueArguments.getOrNull(i) ?: return null
val argumentType = argument.getExpressionType()
for (resolveResult in multiResolve()) {
val psiMethod = resolveResult.element as? PsiMethod ?: continue
val psiParameter = psiMethod.parameterList.parameters.getOrNull(i) ?: continue
if (argumentType == null || psiParameter.type.isAssignableFrom(argumentType))
return argument
}
return null
}
override fun getExpressionType(): PsiType? {
super<KotlinUElementWithType>.getExpressionType()?.let { return it }
for (resolveResult in multiResolve()) {
val psiMethod = resolveResult.element
when {
psiMethod.isConstructor ->
psiMethod.containingClass?.let { return PsiTypesUtil.getClassType(it) }
else ->
psiMethod.returnType?.let { return it }
}
}
return null
}
override val typeArgumentCount: Int
get() = sourcePsi.typeArguments.size
override val typeArguments by lz {
sourcePsi.typeArguments.map { ktTypeProjection ->
ktTypeProjection.typeReference?.let { baseResolveProviderService.resolveToType(it, this, boxed = true) } ?: UastErrorType
}
}
override val returnType: PsiType? by lz {
getExpressionType()
}
override val kind: UastCallKind by lz {
baseResolveProviderService.callKind(sourcePsi)
}
override val receiver: UExpression? by lz {
(uastParent as? UQualifiedReferenceExpression)?.let {
if (it.selector == this) return@lz it.receiver
}
val ktNameReferenceExpression = sourcePsi.calleeExpression as? KtNameReferenceExpression ?: return@lz null
val localCallableDeclaration =
baseResolveProviderService.resolveToDeclaration(ktNameReferenceExpression) as? PsiVariable ?: return@lz null
if (localCallableDeclaration !is PsiLocalVariable && localCallableDeclaration !is PsiParameter) return@lz null
// an implicit receiver for variables calls (KT-25524)
object : KotlinAbstractUExpression(this), UReferenceExpression {
override val sourcePsi: KtNameReferenceExpression get() = ktNameReferenceExpression
override val resolvedName: String? get() = localCallableDeclaration.name
override fun resolve(): PsiElement = localCallableDeclaration
}
}
private val multiResolved: Iterable<TypedResolveResult<PsiMethod>> by lz {
val contextElement = sourcePsi
val calleeExpression = contextElement.calleeExpression as? KtReferenceExpression ?: return@lz emptyList()
val methodName = methodName ?: calleeExpression.text ?: return@lz emptyList()
val variants = baseResolveProviderService.getReferenceVariants(calleeExpression, methodName)
variants.flatMap {
when (it) {
is PsiClass -> it.constructors.asSequence()
is PsiMethod -> sequenceOf(it)
else -> emptySequence()
}
}.map { TypedResolveResult(it) }.asIterable()
}
override fun multiResolve(): Iterable<TypedResolveResult<PsiMethod>> =
multiResolved
override fun resolve(): PsiMethod? =
baseResolveProviderService.resolveCall(sourcePsi)
override fun accept(visitor: UastVisitor) {
if (visitor.visitCallExpression(this)) return
uAnnotations.acceptList(visitor)
methodIdentifier?.accept(visitor)
classReference.accept(visitor)
valueArguments.acceptList(visitor)
visitor.afterVisitCallExpression(this)
}
override fun convertParent(): UElement? = super.convertParent().let { result ->
when (result) {
is UMethod -> result.uastBody ?: result
is UClass ->
result.methods
.filterIsInstance<KotlinConstructorUMethod>()
.firstOrNull { it.isPrimary }
?.uastBody
?: result
else -> result
}
}
}
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