1 files changed, 76 insertions, 0 deletions
diff --git a/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSFunctionImpl.kt b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSFunctionImpl.kt
new file mode 100644
index 00000000..55eebfbf
--- /dev/null
+++ b/compiler-plugin/src/main/kotlin/com/google/devtools/ksp/symbol/impl/kotlin/KSFunctionImpl.kt
@@ -0,0 +1,76 @@
+/*
+ * 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.symbol.KSFunction
+import com.google.devtools.ksp.symbol.KSType
+import com.google.devtools.ksp.symbol.KSTypeParameter
+import com.google.devtools.ksp.symbol.impl.binary.KSTypeParameterDescriptorImpl
+import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import java.util.Objects
+
+class KSFunctionImpl(val descriptor: CallableDescriptor) : KSFunction {
+
+    override val isError: Boolean = false
+
+    private val cachedHashCode by lazy(LazyThreadSafetyMode.PUBLICATION) {
+        Objects.hash(
+            returnType ?: 0,
+            parameterTypes,
+            typeParameters,
+            extensionReceiverType ?: 0
+        )
+    }
+
+    override val returnType by lazy(LazyThreadSafetyMode.PUBLICATION) {
+        descriptor.returnType?.let(::getKSTypeCached)
+    }
+    override val parameterTypes: List<KSType> by lazy(LazyThreadSafetyMode.PUBLICATION) {
+        descriptor.valueParameters.map {
+            getKSTypeCached(it.type)
+        }
+    }
+    override val typeParameters: List<KSTypeParameter> by lazy(LazyThreadSafetyMode.PUBLICATION) {
+        descriptor.typeParameters.map {
+            KSTypeParameterDescriptorImpl.getCached(it)
+        }
+    }
+
+    override val extensionReceiverType: KSType? by lazy(LazyThreadSafetyMode.PUBLICATION) {
+        descriptor.extensionReceiverParameter?.type?.let(::getKSTypeCached)
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as KSFunctionImpl
+
+        if (returnType != other.returnType) return false
+        if (parameterTypes != other.parameterTypes) return false
+        if (typeParameters != other.typeParameters) return false
+        if (extensionReceiverType != other.extensionReceiverType) return false
+
+        return true
+    }
+
+    override fun hashCode() = cachedHashCode
+
+    override fun toString(): String {
+        return "KSFunctionImpl(descriptor=$descriptor)"
+    }
+}