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.lang.types.lang;
018    
019    import kotlin.KotlinPackage;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
023    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
024    import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
025    import org.jetbrains.jet.lang.descriptors.ValueParameterDescriptor;
026    import org.jetbrains.jet.lang.descriptors.annotations.Annotated;
027    import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor;
028    import org.jetbrains.jet.lang.resolve.DescriptorUtils;
029    import org.jetbrains.jet.lang.resolve.constants.ArrayValue;
030    import org.jetbrains.jet.lang.resolve.constants.CompileTimeConstant;
031    import org.jetbrains.jet.lang.resolve.constants.EnumValue;
032    
033    import java.util.List;
034    
035    public class InlineUtil {
036    
037        public static boolean hasNoinlineAnnotation(@NotNull CallableDescriptor valueParameterDescriptor) {
038            return KotlinBuiltIns.containsAnnotation(valueParameterDescriptor, KotlinBuiltIns.getInstance().getNoinlineClassAnnotation());
039        }
040    
041        @NotNull
042        public static InlineStrategy getInlineType(@NotNull DeclarationDescriptor descriptor) {
043            ClassDescriptor inlineAnnotation = KotlinBuiltIns.getInstance().getInlineClassAnnotation();
044            AnnotationDescriptor annotation = descriptor.getAnnotations().findAnnotation(DescriptorUtils.getFqNameSafe(inlineAnnotation));
045            if (annotation == null) {
046                return InlineStrategy.NOT_INLINE;
047            }
048            CompileTimeConstant<?> argument = getAnnotationSingleArgument(descriptor, inlineAnnotation);
049            if (argument == null) {
050                return InlineStrategy.AS_FUNCTION;
051            }
052            assert argument instanceof EnumValue : "Inline annotation parameter should be enum entry but was: " + argument;
053            String name = ((EnumValue) argument).getValue().getName().asString();
054            return name.equals(InlineStrategy.IN_PLACE.name()) ? InlineStrategy.IN_PLACE : InlineStrategy.AS_FUNCTION;
055        }
056    
057        public static boolean hasOnlyLocalContinueAndBreak(@NotNull ValueParameterDescriptor descriptor) {
058            return hasInlineOption(descriptor, InlineOption.LOCAL_CONTINUE_AND_BREAK);
059        }
060    
061        public static boolean hasOnlyLocalReturn(@NotNull ValueParameterDescriptor descriptor) {
062            return hasInlineOption(descriptor, InlineOption.ONLY_LOCAL_RETURN);
063        }
064    
065        private static boolean hasInlineOption(@NotNull ValueParameterDescriptor descriptor, @NotNull InlineOption option) {
066            CompileTimeConstant<?> argument =
067                    getAnnotationSingleArgument(descriptor, KotlinBuiltIns.getInstance().getInlineOptionsClassAnnotation());
068    
069            if (argument instanceof ArrayValue) {
070                List<CompileTimeConstant<?>> values = ((ArrayValue) argument).getValue();
071    
072                for (CompileTimeConstant<?> value : values) {
073                    if (value instanceof EnumValue) {
074                        if (((EnumValue) value).getValue().getName().asString().equals(option.name())) {
075                            return true;
076                        }
077                    }
078                }
079            }
080    
081            return false;
082        }
083    
084        @Nullable
085        private static CompileTimeConstant<?> getAnnotationSingleArgument(
086                @NotNull Annotated annotated,
087                @NotNull ClassDescriptor annotationClass
088        ) {
089            AnnotationDescriptor annotation = annotated.getAnnotations().findAnnotation(DescriptorUtils.getFqNameSafe(annotationClass));
090            if (annotation != null) {
091                return KotlinPackage.firstOrNull(annotation.getAllValueArguments().values());
092            }
093            return null;
094        }
095    }