1 files changed, 83 insertions, 0 deletions
diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSTypeArgumentImpl.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSTypeArgumentImpl.kt
new file mode 100644
index 00000000..d3cb3975
--- /dev/null
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSTypeArgumentImpl.kt
@@ -0,0 +1,83 @@
+/*
+ * 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.findParentOfType
+import com.google.devtools.ksp.memoized
+import com.google.devtools.ksp.symbol.KSAnnotation
+import com.google.devtools.ksp.symbol.KSNode
+import com.google.devtools.ksp.symbol.KSTypeArgument
+import com.google.devtools.ksp.symbol.KSTypeReference
+import com.google.devtools.ksp.symbol.KSVisitor
+import com.google.devtools.ksp.symbol.Location
+import com.google.devtools.ksp.symbol.Origin
+import com.google.devtools.ksp.symbol.Variance
+import com.google.devtools.ksp.symbol.impl.toLocation
+import org.jetbrains.kotlin.psi.KtProjectionKind
+import org.jetbrains.kotlin.psi.KtTypeProjection
+import org.jetbrains.kotlin.psi.KtUserType
+
+abstract class KSTypeArgumentImpl : KSTypeArgument {
+    override fun <D, R> accept(visitor: KSVisitor<D, R>, data: D): R {
+        return visitor.visitTypeArgument(this, data)
+    }
+
+    override fun toString(): String {
+        return "$variance $type"
+    }
+}
+
+class KSTypeArgumentKtImpl private constructor(val ktTypeArgument: KtTypeProjection) : KSTypeArgumentImpl() {
+    companion object : KSObjectCache<KtTypeProjection, KSTypeArgumentKtImpl>() {
+        fun getCached(ktTypeArgument: KtTypeProjection) = cache.getOrPut(ktTypeArgument) {
+            KSTypeArgumentKtImpl(ktTypeArgument)
+        }
+    }
+
+    override val origin = Origin.KOTLIN
+
+    override val location: Location by lazy {
+        ktTypeArgument.toLocation()
+    }
+
+    override val parent: KSNode? by lazy {
+        ktTypeArgument.findParentOfType<KtUserType>()?.let { KSClassifierReferenceImpl.getCached(it) }
+    }
+
+    override val variance: Variance by lazy {
+        when (ktTypeArgument.projectionKind) {
+            KtProjectionKind.STAR -> Variance.STAR
+            KtProjectionKind.IN -> Variance.CONTRAVARIANT
+            KtProjectionKind.NONE -> Variance.INVARIANT
+            KtProjectionKind.OUT -> Variance.COVARIANT
+        }
+    }
+
+    override val type: KSTypeReference? by lazy {
+        if (ktTypeArgument.typeReference != null) {
+            KSTypeReferenceImpl.getCached(ktTypeArgument.typeReference!!)
+        } else {
+            null
+        }
+    }
+
+    override val annotations: Sequence<KSAnnotation> by lazy {
+        ktTypeArgument.annotationEntries.asSequence().map { KSAnnotationImpl.getCached(it) }.memoized()
+    }
+}