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.org.objectweb.asm.Type;
022    import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter;
023    import org.jetbrains.jet.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.lang.psi.JetExpression;
026    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
027    
028    import java.util.List;
029    
030    import static org.jetbrains.jet.lang.types.lang.KotlinBuiltIns.BUILT_INS_PACKAGE_FQ_NAME;
031    
032    public class IteratorNext extends IntrinsicMethod {
033        @NotNull
034        @Override
035        public Type generateImpl(
036                @NotNull ExpressionCodegen codegen,
037                @NotNull InstructionAdapter v,
038                @NotNull Type returnType,
039                PsiElement element,
040                List<JetExpression> arguments,
041                StackValue receiver
042        ) {
043            String name;
044            if (returnType == Type.CHAR_TYPE) {
045                name = "Char";
046            }
047            else if (returnType == Type.BOOLEAN_TYPE) {
048                name = "Boolean";
049            }
050            else if (returnType == Type.BYTE_TYPE) {
051                name = "Byte";
052            }
053            else if (returnType == Type.SHORT_TYPE) {
054                name = "Short";
055            }
056            else if (returnType == Type.INT_TYPE) {
057                name = "Int";
058            }
059            else if (returnType == Type.LONG_TYPE) {
060                name = "Long";
061            }
062            else if (returnType == Type.FLOAT_TYPE) {
063                name = "Float";
064            }
065            else if (returnType == Type.DOUBLE_TYPE) {
066                name = "Double";
067            }
068            else {
069                throw new UnsupportedOperationException();
070            }
071            receiver.put(AsmTypeConstants.OBJECT_TYPE, v);
072            v.invokevirtual(BUILT_INS_PACKAGE_FQ_NAME + "/" + name + "Iterator", "next" + name, "()" + returnType.getDescriptor());
073            return returnType;
074        }
075    }