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.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.lang.psi.JetExpression;
026    
027    import java.util.List;
028    
029    public class StringLength extends IntrinsicMethod {
030        @NotNull
031        @Override
032        public Type generateImpl(
033                @NotNull ExpressionCodegen codegen,
034                @NotNull InstructionAdapter v,
035                @NotNull Type returnType,
036                PsiElement element,
037                List<JetExpression> arguments,
038                StackValue receiver
039        ) {
040            receiver.put(receiver.type, v);
041            v.invokeinterface("java/lang/CharSequence", "length", "()I");
042            return Type.INT_TYPE;
043        }
044    }