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.resolve.extension;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.annotations.Nullable;
021 import org.jetbrains.jet.lang.descriptors.*;
022 import org.jetbrains.jet.lang.diagnostics.Errors;
023 import org.jetbrains.jet.lang.psi.*;
024 import org.jetbrains.jet.lang.resolve.BindingTrace;
025 import org.jetbrains.jet.lang.resolve.FunctionAnalyzerExtension;
026 import org.jetbrains.jet.lang.types.JetType;
027 import org.jetbrains.jet.lang.types.lang.InlineUtil;
028 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
029
030 import java.util.List;
031
032 public class InlineAnalyzerExtension implements FunctionAnalyzerExtension.AnalyzerExtension {
033
034 public static final InlineAnalyzerExtension INSTANCE = new InlineAnalyzerExtension();
035
036 private InlineAnalyzerExtension() {
037
038 }
039
040 @Override
041 public void process(
042 @NotNull final FunctionDescriptor descriptor, @NotNull JetNamedFunction function, @NotNull final BindingTrace trace
043 ) {
044 assert descriptor instanceof SimpleFunctionDescriptor && ((SimpleFunctionDescriptor) descriptor).getInlineStrategy().isInline() :
045 "This method should be invoced on inline function: " + descriptor;
046
047 checkDefaults(descriptor, function, trace);
048 checkNotVirtual(descriptor, function, trace);
049 checkHasInlinableAndNullability(descriptor, function, trace);
050
051 JetVisitorVoid visitor = new JetVisitorVoid() {
052
053 @Override
054 public void visitJetElement(@NotNull JetElement element) {
055 super.visitJetElement(element);
056 element.acceptChildren(this);
057 }
058
059 @Override
060 public void visitClass(@NotNull JetClass klass) {
061 trace.report(Errors.NOT_YET_SUPPORTED_IN_INLINE.on(klass, klass, descriptor));
062 }
063
064 @Override
065 public void visitObjectDeclaration(@NotNull JetObjectDeclaration declaration) {
066 trace.report(Errors.NOT_YET_SUPPORTED_IN_INLINE.on(declaration, declaration, descriptor));
067 }
068
069 @Override
070 public void visitNamedFunction(@NotNull JetNamedFunction function) {
071 trace.report(Errors.NOT_YET_SUPPORTED_IN_INLINE.on(function, function, descriptor));
072 }
073 };
074
075 function.acceptChildren(visitor);
076 }
077
078 private static void checkDefaults(
079 @NotNull FunctionDescriptor functionDescriptor,
080 @NotNull JetFunction function,
081 @NotNull BindingTrace trace
082 ) {
083 int index = 0;
084 List<JetParameter> jetParameters = function.getValueParameters();
085 for (ValueParameterDescriptor parameter : functionDescriptor.getValueParameters()) {
086 if (parameter.hasDefaultValue()) {
087 JetParameter jetParameter = jetParameters.get(index);
088 trace.report(Errors.NOT_YET_SUPPORTED_IN_INLINE.on(jetParameter, jetParameter, functionDescriptor));
089 }
090 index++;
091 }
092 }
093
094 private static void checkNotVirtual(
095 @NotNull FunctionDescriptor functionDescriptor,
096 @NotNull JetFunction function,
097 @NotNull BindingTrace trace
098 ) {
099 if (functionDescriptor.getVisibility() == Visibilities.PRIVATE || functionDescriptor.getModality() == Modality.FINAL) {
100 return;
101 }
102
103 if (functionDescriptor.getContainingDeclaration() instanceof PackageFragmentDescriptor) {
104 return;
105 }
106
107 trace.report(Errors.DECLARATION_CANT_BE_INLINED.on(function));
108 }
109
110
111 private static void checkHasInlinableAndNullability(
112 @NotNull FunctionDescriptor functionDescriptor,
113 @NotNull JetFunction function,
114 @NotNull BindingTrace trace
115 ) {
116 boolean hasInlinable = false;
117 List<ValueParameterDescriptor> parameters = functionDescriptor.getValueParameters();
118 int index = 0;
119 for (ValueParameterDescriptor parameter : parameters) {
120 hasInlinable |= checkInlinableParameter(parameter, function.getValueParameters().get(index++), functionDescriptor, trace);
121 }
122 ReceiverParameterDescriptor receiverParameter = functionDescriptor.getReceiverParameter();
123 if (receiverParameter != null) {
124 JetTypeReference receiver = function.getReceiverTypeRef();
125 assert receiver != null : "Descriptor has a receiver but psi doesn't " + function.getText();
126 hasInlinable |= checkInlinableParameter(receiverParameter, receiver, functionDescriptor, trace);
127 }
128
129 if (!hasInlinable) {
130 trace.report(Errors.NOTHING_TO_INLINE.on(function, functionDescriptor));
131 }
132 }
133
134 public static boolean checkInlinableParameter(
135 @NotNull CallableDescriptor parameter,
136 @NotNull JetElement expression,
137 @NotNull CallableDescriptor functionDescriptor,
138 @Nullable BindingTrace trace
139 ) {
140 KotlinBuiltIns builtIns = KotlinBuiltIns.getInstance();
141 JetType type = parameter.getReturnType();
142 if (type != null && builtIns.isExactFunctionOrExtensionFunctionType(type)) {
143 if (!InlineUtil.hasNoinlineAnnotation(parameter)) {
144 if (type.isNullable()) {
145 if (trace != null) {
146 trace.report(Errors.NULLABLE_INLINE_PARAMETER.on(expression, expression, functionDescriptor));
147 }
148 }
149 else {
150 return true;
151 }
152 }
153 }
154 return false;
155 }
156 }