1 /* 2 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package vm.mlvm.meth.share.transform.v2; 25 26 import java.lang.invoke.MethodHandle; 27 import java.lang.invoke.MethodHandles; 28 import java.util.Arrays; 29 30 import nsk.share.test.TestUtils; 31 import vm.mlvm.meth.share.Argument; 32 import vm.mlvm.meth.share.MHUtils; 33 34 public class MHFoldTF extends MHNaryTF { 35 36 protected final MHCall _combiner, _target; 37 38 public MHFoldTF(MHCall target, MHCall combiner) { 39 _target = target; 40 _combiner = combiner; 41 } 42 43 @Override 44 protected void check() throws IllegalArgumentException { 45 Argument[] targetArgs = _target.getArgs(); 46 Argument[] combinerArgs = _combiner.getArgs(); 47 48 MHUtils.assertAssignableType( 49 "combiner result assignable to parameter 0", 50 targetArgs[0].getType(), 51 _combiner.getRetVal().getType()); 52 53 for ( int i = 0; i < combinerArgs.length; i++ ) { 54 MHUtils.assertAssignableType( 55 "combiner parameter " + i + " assignable to target parameter " + (i + 1), 56 combinerArgs[i].getType(), 57 targetArgs[i + 1].getType()); 58 } 59 } 60 61 @Override 62 protected Argument computeRetVal() { 63 return _target.getRetVal(); 64 } 65 66 @Override 67 protected Argument[] computeInboundArgs() { 68 return TestUtils.cdr(_target.getArgs()); 69 } 70 71 @Override 72 protected MethodHandle computeInboundMH() { 73 return MethodHandles.foldArguments(_target.getTargetMH(), _combiner.getTargetMH()); 74 } 75 76 @Override 77 public MHCall[] getOutboundCalls() { 78 return new MHCall[] { _target, _combiner }; 79 } 80 81 @Override 82 protected String getName() { 83 return "foldArguments"; 84 } 85 86 @Override 87 protected String getDescription() { 88 return "combiner=" + _combiner; 89 } 90 }