| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.codehaus.groovy.transform.tailrec |
| |
| import groovy.transform.CompileStatic |
| import org.codehaus.groovy.ast.CodeVisitorSupport |
| import org.codehaus.groovy.ast.MethodNode |
| import org.codehaus.groovy.ast.expr.Expression |
| import org.codehaus.groovy.ast.expr.MethodCallExpression |
| import org.codehaus.groovy.ast.expr.StaticMethodCallExpression; |
| |
| /** |
| * Collect all recursive calls within method |
| * |
| * @author Johannes Link |
| */ |
| @CompileStatic |
| class CollectRecursiveCalls extends CodeVisitorSupport { |
| MethodNode method |
| List<Expression> recursiveCalls = [] |
| |
| public void visitMethodCallExpression(MethodCallExpression call) { |
| if (isRecursive(call)) { |
| recursiveCalls << call |
| } |
| super.visitMethodCallExpression(call) |
| } |
| |
| public void visitStaticMethodCallExpression(StaticMethodCallExpression call) { |
| if (isRecursive(call)) { |
| recursiveCalls << call |
| } |
| super.visitStaticMethodCallExpression(call) |
| } |
| |
| private boolean isRecursive(call) { |
| new RecursivenessTester().isRecursive(method: method, call: call) |
| } |
| |
| synchronized List<Expression> collect(MethodNode method) { |
| recursiveCalls.clear() |
| this.method = method |
| this.method.code.visit(this) |
| recursiveCalls |
| } |
| } |