001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.asm4.Type;
022    import org.jetbrains.asm4.commons.InstructionAdapter;
023    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
024    import org.jetbrains.jet.codegen.ExpressionCodegen;
025    import org.jetbrains.jet.codegen.StackValue;
026    import org.jetbrains.jet.codegen.state.GenerationState;
027    import org.jetbrains.jet.lang.psi.JetExpression;
028    
029    import java.util.List;
030    
031    public class IteratorNext implements IntrinsicMethod {
032        @Override
033        public StackValue generate(
034                ExpressionCodegen codegen,
035                InstructionAdapter v,
036                @NotNull Type expectedType,
037                PsiElement element,
038                List<JetExpression> arguments,
039                StackValue receiver,
040                @NotNull GenerationState state
041        ) {
042            String name;
043            if (expectedType == Type.CHAR_TYPE) {
044                name = "Char";
045            }
046            else if (expectedType == Type.BOOLEAN_TYPE) {
047                name = "Boolean";
048            }
049            else if (expectedType == Type.BYTE_TYPE) {
050                name = "Byte";
051            }
052            else if (expectedType == Type.SHORT_TYPE) {
053                name = "Short";
054            }
055            else if (expectedType == Type.INT_TYPE) {
056                name = "Int";
057            }
058            else if (expectedType == Type.LONG_TYPE) {
059                name = "Long";
060            }
061            else if (expectedType == Type.FLOAT_TYPE) {
062                name = "Float";
063            }
064            else if (expectedType == Type.DOUBLE_TYPE) {
065                name = "Double";
066            }
067            else {
068                throw new UnsupportedOperationException();
069            }
070            receiver.put(AsmTypeConstants.OBJECT_TYPE, v);
071            v.invokevirtual("jet/" + name + "Iterator", "next" + name, "()" + expectedType.getDescriptor());
072            return StackValue.onStack(expectedType);
073        }
074    }