1 //===- MultiplexConsumer.cpp - AST Consumer for PCH Generation --*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //  This file defines the MultiplexConsumer class. It also declares and defines
11 //  MultiplexASTDeserializationListener and  MultiplexASTMutationListener, which
12 //  are implementation details of MultiplexConsumer.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "clang/Frontend/MultiplexConsumer.h"
17 
18 #include "clang/AST/ASTMutationListener.h"
19 #include "clang/AST/DeclGroup.h"
20 #include "clang/Serialization/ASTDeserializationListener.h"
21 
22 using namespace clang;
23 
24 namespace clang {
25 
26 // This ASTDeserializationListener forwards its notifications to a set of
27 // child listeners.
28 class MultiplexASTDeserializationListener
29     : public ASTDeserializationListener {
30 public:
31   // Does NOT take ownership of the elements in L.
32   MultiplexASTDeserializationListener(
33       const std::vector<ASTDeserializationListener*>& L);
34   virtual void ReaderInitialized(ASTReader *Reader);
35   virtual void IdentifierRead(serialization::IdentID ID,
36                               IdentifierInfo *II);
37   virtual void TypeRead(serialization::TypeIdx Idx, QualType T);
38   virtual void DeclRead(serialization::DeclID ID, const Decl *D);
39   virtual void SelectorRead(serialization::SelectorID iD, Selector Sel);
40   virtual void MacroDefinitionRead(serialization::PreprocessedEntityID,
41                                    MacroDefinition *MD);
42 private:
43   std::vector<ASTDeserializationListener*> Listeners;
44 };
45 
46 MultiplexASTDeserializationListener::MultiplexASTDeserializationListener(
47       const std::vector<ASTDeserializationListener*>& L)
48     : Listeners(L) {
49 }
50 
51 void MultiplexASTDeserializationListener::ReaderInitialized(
52     ASTReader *Reader) {
53   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
54     Listeners[i]->ReaderInitialized(Reader);
55 }
56 
57 void MultiplexASTDeserializationListener::IdentifierRead(
58     serialization::IdentID ID, IdentifierInfo *II) {
59   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
60     Listeners[i]->IdentifierRead(ID, II);
61 }
62 
63 void MultiplexASTDeserializationListener::TypeRead(
64     serialization::TypeIdx Idx, QualType T) {
65   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
66     Listeners[i]->TypeRead(Idx, T);
67 }
68 
69 void MultiplexASTDeserializationListener::DeclRead(
70     serialization::DeclID ID, const Decl *D) {
71   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
72     Listeners[i]->DeclRead(ID, D);
73 }
74 
75 void MultiplexASTDeserializationListener::SelectorRead(
76     serialization::SelectorID ID, Selector Sel) {
77   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
78     Listeners[i]->SelectorRead(ID, Sel);
79 }
80 
81 void MultiplexASTDeserializationListener::MacroDefinitionRead(
82     serialization::PreprocessedEntityID ID, MacroDefinition *MD) {
83   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
84     Listeners[i]->MacroDefinitionRead(ID, MD);
85 }
86 
87 // This ASTMutationListener forwards its notifications to a set of
88 // child listeners.
89 class MultiplexASTMutationListener : public ASTMutationListener {
90 public:
91   // Does NOT take ownership of the elements in L.
92   MultiplexASTMutationListener(const std::vector<ASTMutationListener*>& L);
93   virtual void CompletedTagDefinition(const TagDecl *D);
94   virtual void AddedVisibleDecl(const DeclContext *DC, const Decl *D);
95   virtual void AddedCXXImplicitMember(const CXXRecordDecl *RD, const Decl *D);
96   virtual void AddedCXXTemplateSpecialization(const ClassTemplateDecl *TD,
97                                     const ClassTemplateSpecializationDecl *D);
98   virtual void AddedCXXTemplateSpecialization(const FunctionTemplateDecl *TD,
99                                               const FunctionDecl *D);
100   virtual void CompletedImplicitDefinition(const FunctionDecl *D);
101   virtual void StaticDataMemberInstantiated(const VarDecl *D);
102 private:
103   std::vector<ASTMutationListener*> Listeners;
104 };
105 
106 MultiplexASTMutationListener::MultiplexASTMutationListener(
107     const std::vector<ASTMutationListener*>& L)
108     : Listeners(L) {
109 }
110 
111 void MultiplexASTMutationListener::CompletedTagDefinition(const TagDecl *D) {
112   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
113     Listeners[i]->CompletedTagDefinition(D);
114 }
115 
116 void MultiplexASTMutationListener::AddedVisibleDecl(
117     const DeclContext *DC, const Decl *D) {
118   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
119     Listeners[i]->AddedVisibleDecl(DC, D);
120 }
121 
122 void MultiplexASTMutationListener::AddedCXXImplicitMember(
123     const CXXRecordDecl *RD, const Decl *D) {
124   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
125     Listeners[i]->AddedCXXImplicitMember(RD, D);
126 }
127 void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(
128     const ClassTemplateDecl *TD, const ClassTemplateSpecializationDecl *D) {
129   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
130     Listeners[i]->AddedCXXTemplateSpecialization(TD, D);
131 }
132 void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(
133     const FunctionTemplateDecl *TD, const FunctionDecl *D) {
134   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
135     Listeners[i]->AddedCXXTemplateSpecialization(TD, D);
136 }
137 void MultiplexASTMutationListener::CompletedImplicitDefinition(
138                                                         const FunctionDecl *D) {
139   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
140     Listeners[i]->CompletedImplicitDefinition(D);
141 }
142 void MultiplexASTMutationListener::StaticDataMemberInstantiated(
143                                                              const VarDecl *D) {
144   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
145     Listeners[i]->StaticDataMemberInstantiated(D);
146 }
147 
148 }  // end namespace clang
149 
150 
151 MultiplexConsumer::MultiplexConsumer(const std::vector<ASTConsumer*>& C)
152     : Consumers(C), MutationListener(0), DeserializationListener(0) {
153   // Collect the mutation listeners and deserialization listeners of all
154   // children, and create a multiplex listener each if so.
155   std::vector<ASTMutationListener*> mutationListeners;
156   std::vector<ASTDeserializationListener*> serializationListeners;
157   for (size_t i = 0, e = Consumers.size(); i != e; ++i) {
158     ASTMutationListener* mutationListener =
159         Consumers[i]->GetASTMutationListener();
160     if (mutationListener)
161       mutationListeners.push_back(mutationListener);
162     ASTDeserializationListener* serializationListener =
163         Consumers[i]->GetASTDeserializationListener();
164     if (serializationListener)
165       serializationListeners.push_back(serializationListener);
166   }
167   if (mutationListeners.size()) {
168     MutationListener.reset(new MultiplexASTMutationListener(mutationListeners));
169   }
170   if (serializationListeners.size()) {
171     DeserializationListener.reset(
172         new MultiplexASTDeserializationListener(serializationListeners));
173   }
174 }
175 
176 MultiplexConsumer::~MultiplexConsumer() {
177   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
178     delete Consumers[i];
179 }
180 
181 void MultiplexConsumer::Initialize(ASTContext &Context) {
182   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
183     Consumers[i]->Initialize(Context);
184 }
185 
186 bool MultiplexConsumer::HandleTopLevelDecl(DeclGroupRef D) {
187   bool Continue = true;
188   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
189     Continue = Continue && Consumers[i]->HandleTopLevelDecl(D);
190   return Continue;
191 }
192 
193 void MultiplexConsumer::HandleInterestingDecl(DeclGroupRef D) {
194   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
195     Consumers[i]->HandleInterestingDecl(D);
196 }
197 
198 void MultiplexConsumer::HandleTranslationUnit(ASTContext &Ctx) {
199   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
200     Consumers[i]->HandleTranslationUnit(Ctx);
201 }
202 
203 void MultiplexConsumer::HandleTagDeclDefinition(TagDecl *D) {
204   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
205     Consumers[i]->HandleTagDeclDefinition(D);
206 }
207 
208 void MultiplexConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
209   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
210     Consumers[i]->HandleTopLevelDeclInObjCContainer(D);
211 }
212 
213 void MultiplexConsumer::CompleteTentativeDefinition(VarDecl *D) {
214   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
215     Consumers[i]->CompleteTentativeDefinition(D);
216 }
217 
218 void MultiplexConsumer::HandleVTable(
219     CXXRecordDecl *RD, bool DefinitionRequired) {
220   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
221     Consumers[i]->HandleVTable(RD, DefinitionRequired);
222 }
223 
224 ASTMutationListener *MultiplexConsumer::GetASTMutationListener() {
225   return MutationListener.get();
226 }
227 
228 ASTDeserializationListener *MultiplexConsumer::GetASTDeserializationListener() {
229   return DeserializationListener.get();
230 }
231 
232 void MultiplexConsumer::PrintStats() {
233   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
234     Consumers[i]->PrintStats();
235 }
236 
237 void MultiplexConsumer::InitializeSema(Sema &S) {
238   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
239     if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
240       SC->InitializeSema(S);
241 }
242 
243 void MultiplexConsumer::ForgetSema() {
244   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
245     if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
246       SC->ForgetSema();
247 }
248