Add KCallableNamePropertyLowering

2017-06-02 15:49:06 +02:00
parent 44b7f5a5be
commit d888addba0
5 changed files with 86 additions and 76 deletions
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.kotlin.backend.common.lower
+
+import org.jetbrains.kotlin.backend.common.BackendContext
+import org.jetbrains.kotlin.backend.common.FileLoweringPass
+import org.jetbrains.kotlin.builtins.functions.FunctionClassDescriptor
+import org.jetbrains.kotlin.builtins.getFunctionalClassKind
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.expressions.IrCall
+import org.jetbrains.kotlin.ir.expressions.IrCallableReference
+import org.jetbrains.kotlin.ir.expressions.IrExpression
+import org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl
+import org.jetbrains.kotlin.ir.expressions.impl.IrConstImpl
+import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
+import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
+import org.jetbrains.kotlin.resolve.DescriptorUtils
+import org.jetbrains.kotlin.types.KotlinType
+
+class KCallableNamePropertyLowering(val context: BackendContext) : FileLoweringPass {
+    override fun lower(irFile: IrFile) {
+        irFile.transformChildrenVoid(KCallableNamePropertyTransformer(this))
+    }
+}
+
+private class KCallableNamePropertyTransformer(val lower: KCallableNamePropertyLowering) : IrElementTransformerVoid() {
+
+    override fun visitCall(expression: IrCall): IrExpression {
+        val callableReference = expression.dispatchReceiver as? IrCallableReference ?: return expression
+
+        //TODO rewrite checking
+        val directMember = DescriptorUtils.getDirectMember(expression.descriptor)
+        if (!((directMember.containingDeclaration as? ClassDescriptor)?.defaultType?.isKFunctionType ?: false)) return expression
+        if (directMember.name.asString() != "name") return expression
+
+        val receiver = callableReference.dispatchReceiver ?: callableReference.extensionReceiver
+
+        return lower.context.createIrBuilder(expression.symbol, expression.startOffset, expression.endOffset).run {
+
+            IrCompositeImpl(startOffset, endOffset, context.builtIns.stringType).apply {
+                receiver?.let {
+                    //put receiver for bound callable reference
+                    statements.add(it)
+                }
+
+                statements.add(
+                        IrConstImpl.string(
+                                expression.startOffset,
+                                expression.endOffset,
+                                context.builtIns.stringType,
+                                callableReference.descriptor.name.asString()
+                        )
+                )
+            }
+
+        }
+
+    }
+}
+
+//TODO move to utils
+val KotlinType.isKFunctionType: Boolean
+    get() {
+        val kind = constructor.declarationDescriptor?.getFunctionalClassKind()
+        return kind == FunctionClassDescriptor.Kind.KFunction
+    }