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/*
* Copyright 2020 Google LLC
* Copyright 2010-2020 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.
*/
package com.google.devtools.ksp.symbol.impl.kotlin
import com.google.devtools.ksp.KSObjectCache
import com.google.devtools.ksp.memoized
import com.google.devtools.ksp.processing.impl.KSNameImpl
import com.google.devtools.ksp.processing.impl.ResolverImpl
import com.google.devtools.ksp.symbol.KSExpectActual
import com.google.devtools.ksp.symbol.KSName
import com.google.devtools.ksp.symbol.KSTypeParameter
import com.google.devtools.ksp.symbol.KSTypeReference
import com.google.devtools.ksp.symbol.KSVisitor
import com.google.devtools.ksp.symbol.Variance
import com.google.devtools.ksp.symbol.impl.synthetic.KSTypeReferenceSyntheticImpl
import org.jetbrains.kotlin.lexer.KtTokens
import org.jetbrains.kotlin.psi.KtTypeParameter
import org.jetbrains.kotlin.psi.KtTypeParameterListOwner
class KSTypeParameterImpl private constructor(val ktTypeParameter: KtTypeParameter) :
KSTypeParameter,
KSDeclarationImpl(ktTypeParameter),
KSExpectActual by KSExpectActualNoImpl() {
companion object : KSObjectCache<KtTypeParameter, KSTypeParameterImpl>() {
fun getCached(ktTypeParameter: KtTypeParameter) =
cache.getOrPut(ktTypeParameter) { KSTypeParameterImpl(ktTypeParameter) }
}
override val name: KSName by lazy {
KSNameImpl.getCached(ktTypeParameter.name!!)
}
override val isReified: Boolean by lazy {
ktTypeParameter.modifierList?.hasModifier(KtTokens.REIFIED_KEYWORD) ?: false
}
override val variance: Variance by lazy {
when {
ktTypeParameter.modifierList == null -> Variance.INVARIANT
ktTypeParameter.modifierList!!.hasModifier(KtTokens.OUT_KEYWORD) -> Variance.COVARIANT
ktTypeParameter.modifierList!!.hasModifier(KtTokens.IN_KEYWORD) -> Variance.CONTRAVARIANT
else -> Variance.INVARIANT
}
}
private val owner: KtTypeParameterListOwner by lazy {
(parentDeclaration as KSDeclarationImpl).ktDeclaration as KtTypeParameterListOwner
}
override val bounds: Sequence<KSTypeReference> by lazy {
val list = sequenceOf(ktTypeParameter.extendsBound)
list.plus(
owner.typeConstraints
.filter {
it.subjectTypeParameterName!!.getReferencedName() == ktTypeParameter.nameAsSafeName.asString()
}
.map { it.boundTypeReference }
).filterNotNull().map { KSTypeReferenceImpl.getCached(it) }.ifEmpty {
sequenceOf(
KSTypeReferenceSyntheticImpl.getCached(ResolverImpl.instance!!.builtIns.anyType.makeNullable(), this)
)
}.memoized()
}
override val qualifiedName: KSName? by lazy {
KSNameImpl.getCached("${this.parentDeclaration!!.qualifiedName!!.asString()}.${simpleName.asString()}")
}
override val simpleName: KSName by lazy {
KSNameImpl.getCached(ktTypeParameter.name ?: "_")
}
override val typeParameters: List<KSTypeParameter> = emptyList()
override fun <D, R> accept(visitor: KSVisitor<D, R>, data: D): R {
return visitor.visitTypeParameter(this, data)
}
}
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