org.jetbrains.kotlin.js.inline.clean.substituteKTypes.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2020 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.js.inline.clean
import org.jetbrains.kotlin.js.backend.ast.*
import org.jetbrains.kotlin.js.backend.ast.metadata.*
// Replaces getReifiedTypeParameterKType() with its KType
fun substituteKTypes(root: JsNode) {
val visitor = object : JsVisitorWithContextImpl() {
override fun endVisit(invocation: JsInvocation, ctx: JsContext) {
// for invocations from non-inline contexts
invocation.checkDoesNotCreateRecursiveKType()
val qualifier = invocation.qualifier as? JsNameRef ?: return
if (qualifier.name?.specialFunction != SpecialFunction.GET_REIFIED_TYPE_PARAMETER_KTYPE) return
val firstArg = invocation.arguments.first()
getTransitiveKType(firstArg)?.let {
// for invocations from inline contexts
it.checkNoInvocationsWithRecursiveKType()
ctx.replaceMe(it)
}
}
}
visitor.accept(root)
}
// Get KType from expression or from staticRef of referenced name.
// kType metadata is set on jsClass expressions.
// There can be a chain of local variables from jsClass to its usage.
// This methods uses staticRef to find the original expression with kType metadata.
private fun getTransitiveKType(e: JsExpression): JsExpression? {
return when {
e.kType != null ->
e.kType
e is JsNameRef -> {
val staticRef = e.name?.staticRef as? JsExpression ?: return null
getTransitiveKType(staticRef)
}
else -> null
}
}
private fun JsExpression.checkNoInvocationsWithRecursiveKType() {
val visitor = object : JsVisitorWithContextImpl() {
override fun endVisit(invocation: JsInvocation, ctx: JsContext) {
invocation.checkDoesNotCreateRecursiveKType()
}
}
visitor.accept(this)
}
private fun JsInvocation.checkDoesNotCreateRecursiveKType() {
// See KT-40173
if (kTypeWithRecursion) TODO("Non-reified type parameters with recursive bounds are not supported yet")
}