1 files changed, 77 insertions, 0 deletions
diff --git a/kotlin-analysis-api/src/main/kotlin/com/google/devtools/ksp/impl/symbol/kotlin/KSTypeArgumentImpl.kt b/kotlin-analysis-api/src/main/kotlin/com/google/devtools/ksp/impl/symbol/kotlin/KSTypeArgumentImpl.kt
new file mode 100644
index 00000000..ef8aa3eb
--- /dev/null
+++ b/kotlin-analysis-api/src/main/kotlin/com/google/devtools/ksp/impl/symbol/kotlin/KSTypeArgumentImpl.kt
@@ -0,0 +1,77 @@
+/*
+ * 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.
+ */
+
+package com.google.devtools.ksp.impl.symbol.kotlin
+
+import com.google.devtools.ksp.IdKeyPair
+import com.google.devtools.ksp.KSObjectCache
+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 org.jetbrains.kotlin.analysis.api.KtStarTypeProjection
+import org.jetbrains.kotlin.analysis.api.KtTypeArgumentWithVariance
+import org.jetbrains.kotlin.analysis.api.KtTypeProjection
+
+class KSTypeArgumentImpl private constructor(
+    private val ktTypeProjection: KtTypeProjection,
+    override val parent: KSNode?
+) : KSTypeArgument {
+    companion object : KSObjectCache<IdKeyPair<KtTypeProjection, KSNode?>, KSTypeArgumentImpl>() {
+        fun getCached(ktTypeProjection: KtTypeProjection, parent: KSNode? = null) =
+            cache.getOrPut(IdKeyPair(ktTypeProjection, parent)) { KSTypeArgumentImpl(ktTypeProjection, parent) }
+    }
+
+    override val variance: Variance by lazy {
+        when (ktTypeProjection) {
+            is KtStarTypeProjection -> Variance.STAR
+            is KtTypeArgumentWithVariance -> {
+                when (ktTypeProjection.variance) {
+                    org.jetbrains.kotlin.types.Variance.INVARIANT -> Variance.INVARIANT
+                    org.jetbrains.kotlin.types.Variance.IN_VARIANCE -> Variance.CONTRAVARIANT
+                    org.jetbrains.kotlin.types.Variance.OUT_VARIANCE -> Variance.COVARIANT
+                    else -> throw IllegalStateException("Unexpected variance")
+                }
+            }
+        }
+    }
+
+    override val type: KSTypeReference? by lazy {
+        ktTypeProjection.type?.let { KSTypeReferenceImpl.getCached(it, this@KSTypeArgumentImpl) }
+    }
+
+    override val annotations: Sequence<KSAnnotation> by lazy {
+        ktTypeProjection.type?.annotations() ?: emptySequence()
+    }
+
+    override val origin: Origin = parent?.origin ?: Origin.SYNTHETIC
+
+    override val location: Location
+        get() = TODO("Not yet implemented")
+
+    override fun <D, R> accept(visitor: KSVisitor<D, R>, data: D): R {
+        return visitor.visitTypeArgument(this, data)
+    }
+
+    override fun toString(): String {
+        return "$variance $type"
+    }
+}