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
017package org.jetbrains.jet.codegen.intrinsics;
018
019import com.intellij.psi.PsiElement;
020import org.jetbrains.annotations.NotNull;
021import org.jetbrains.asm4.Type;
022import org.jetbrains.asm4.commons.InstructionAdapter;
023import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
024import org.jetbrains.jet.codegen.ExpressionCodegen;
025import org.jetbrains.jet.codegen.StackValue;
026import org.jetbrains.jet.codegen.state.GenerationState;
027import org.jetbrains.jet.lang.psi.JetExpression;
028
029import java.util.List;
030
031public class StringPlus 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        if (receiver == null || receiver == StackValue.none()) {
043            codegen.gen(arguments.get(0)).put(AsmTypeConstants.JAVA_STRING_TYPE, v);
044            codegen.gen(arguments.get(1)).put(AsmTypeConstants.OBJECT_TYPE, v);
045        }
046        else {
047            receiver.put(AsmTypeConstants.JAVA_STRING_TYPE, v);
048            codegen.gen(arguments.get(0)).put(AsmTypeConstants.OBJECT_TYPE, v);
049        }
050        v.invokestatic("jet/runtime/Intrinsics", "stringPlus", "(Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/String;");
051        return StackValue.onStack(AsmTypeConstants.JAVA_STRING_TYPE);
052    }
053}