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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2013-2014 the original author or authors.
*
* 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.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.MethodCallExpression
import org.codehaus.groovy.ast.expr.StaticMethodCallExpression
/**
*
* Check if there are any recursive calls in a method
*
* @author Johannes Link
*/
@CompileStatic
class HasRecursiveCalls extends CodeVisitorSupport {
MethodNode method
boolean hasRecursiveCalls = false
public void visitMethodCallExpression(MethodCallExpression call) {
if (isRecursive(call)) {
hasRecursiveCalls = true
} else {
super.visitMethodCallExpression(call)
}
}
public void visitStaticMethodCallExpression(StaticMethodCallExpression call) {
if (isRecursive(call)) {
hasRecursiveCalls = true
} else {
super.visitStaticMethodCallExpression(call)
}
}
private boolean isRecursive(call) {
new RecursivenessTester().isRecursive(method: method, call: call)
}
synchronized boolean test(MethodNode method) {
hasRecursiveCalls = false
this.method = method
this.method.code.visit(this)
hasRecursiveCalls
}
}