1 files changed, 65 insertions, 0 deletions
diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/binary/KSTypeArgumentDescriptorImpl.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/binary/KSTypeArgumentDescriptorImpl.kt
new file mode 100644
index 00000000..5b76e27a
--- /dev/null
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/binary/KSTypeArgumentDescriptorImpl.kt
@@ -0,0 +1,65 @@
+/*
+ * 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.binary
+
+import com.google.devtools.ksp.IdKeyTriple
+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.KSTypeReference
+import com.google.devtools.ksp.symbol.Location
+import com.google.devtools.ksp.symbol.NonExistLocation
+import com.google.devtools.ksp.symbol.Origin
+import com.google.devtools.ksp.symbol.Variance
+import com.google.devtools.ksp.symbol.impl.kotlin.KSTypeArgumentImpl
+import org.jetbrains.kotlin.types.TypeProjection
+
+class KSTypeArgumentDescriptorImpl private constructor(
+    val descriptor: TypeProjection,
+    override val origin: Origin,
+    override val parent: KSNode?
+) : KSTypeArgumentImpl() {
+    companion object : KSObjectCache<IdKeyTriple<TypeProjection, Origin, KSNode?>, KSTypeArgumentDescriptorImpl>() {
+        fun getCached(descriptor: TypeProjection, origin: Origin, parent: KSNode?) = cache
+            .getOrPut(IdKeyTriple(descriptor, origin, parent)) {
+                KSTypeArgumentDescriptorImpl(descriptor, origin, parent)
+            }
+    }
+
+    override val location: Location = NonExistLocation
+
+    override val type: KSTypeReference by lazy {
+        KSTypeReferenceDescriptorImpl.getCached(descriptor.type, origin, if (parent != null) this else null)
+    }
+
+    override val variance: Variance by lazy {
+        if (descriptor.isStarProjection)
+            Variance.STAR
+        else {
+            when (descriptor.projectionKind) {
+                org.jetbrains.kotlin.types.Variance.IN_VARIANCE -> Variance.CONTRAVARIANT
+                org.jetbrains.kotlin.types.Variance.OUT_VARIANCE -> Variance.COVARIANT
+                else -> Variance.INVARIANT
+            }
+        }
+    }
+
+    override val annotations: Sequence<KSAnnotation> by lazy {
+        descriptor.type.annotations.asSequence().map { KSAnnotationDescriptorImpl.getCached(it, this) }
+    }
+}