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::MacroID,
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::MacroID 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 private:
101   std::vector<ASTMutationListener*> Listeners;
102 };
103 
104 MultiplexASTMutationListener::MultiplexASTMutationListener(
105     const std::vector<ASTMutationListener*>& L)
106     : Listeners(L) {
107 }
108 
109 void MultiplexASTMutationListener::CompletedTagDefinition(const TagDecl *D) {
110   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
111     Listeners[i]->CompletedTagDefinition(D);
112 }
113 
114 void MultiplexASTMutationListener::AddedVisibleDecl(
115     const DeclContext *DC, const Decl *D) {
116   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
117     Listeners[i]->AddedVisibleDecl(DC, D);
118 }
119 
120 void MultiplexASTMutationListener::AddedCXXImplicitMember(
121     const CXXRecordDecl *RD, const Decl *D) {
122   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
123     Listeners[i]->AddedCXXImplicitMember(RD, D);
124 }
125 void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(
126     const ClassTemplateDecl *TD, const ClassTemplateSpecializationDecl *D) {
127   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
128     Listeners[i]->AddedCXXTemplateSpecialization(TD, D);
129 }
130 void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(
131     const FunctionTemplateDecl *TD, const FunctionDecl *D) {
132   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
133     Listeners[i]->AddedCXXTemplateSpecialization(TD, D);
134 }
135 
136 }  // end namespace clang
137 
138 
139 MultiplexConsumer::MultiplexConsumer(const std::vector<ASTConsumer*>& C)
140     : Consumers(C), MutationListener(0), DeserializationListener(0) {
141   // Collect the mutation listeners and deserialization listeners of all
142   // children, and create a multiplex listener each if so.
143   std::vector<ASTMutationListener*> mutationListeners;
144   std::vector<ASTDeserializationListener*> serializationListeners;
145   for (size_t i = 0, e = Consumers.size(); i != e; ++i) {
146     ASTMutationListener* mutationListener =
147         Consumers[i]->GetASTMutationListener();
148     if (mutationListener)
149       mutationListeners.push_back(mutationListener);
150     ASTDeserializationListener* serializationListener =
151         Consumers[i]->GetASTDeserializationListener();
152     if (serializationListener)
153       serializationListeners.push_back(serializationListener);
154   }
155   if (mutationListeners.size()) {
156     MutationListener.reset(new MultiplexASTMutationListener(mutationListeners));
157   }
158   if (serializationListeners.size()) {
159     DeserializationListener.reset(
160         new MultiplexASTDeserializationListener(serializationListeners));
161   }
162 }
163 
164 MultiplexConsumer::~MultiplexConsumer() {
165   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
166     delete Consumers[i];
167 }
168 
169 void MultiplexConsumer::Initialize(ASTContext &Context) {
170   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
171     Consumers[i]->Initialize(Context);
172 }
173 
174 void MultiplexConsumer::HandleTopLevelDecl(DeclGroupRef D) {
175   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
176     Consumers[i]->HandleTopLevelDecl(D);
177 }
178 
179 void MultiplexConsumer::HandleInterestingDecl(DeclGroupRef D) {
180   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
181     Consumers[i]->HandleInterestingDecl(D);
182 }
183 
184 void MultiplexConsumer::HandleTranslationUnit(ASTContext &Ctx) {
185   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
186     Consumers[i]->HandleTranslationUnit(Ctx);
187 }
188 
189 void MultiplexConsumer::HandleTagDeclDefinition(TagDecl *D) {
190   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
191     Consumers[i]->HandleTagDeclDefinition(D);
192 }
193 
194 void MultiplexConsumer::CompleteTentativeDefinition(VarDecl *D) {
195   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
196     Consumers[i]->CompleteTentativeDefinition(D);
197 }
198 
199 void MultiplexConsumer::HandleVTable(
200     CXXRecordDecl *RD, bool DefinitionRequired) {
201   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
202     Consumers[i]->HandleVTable(RD, DefinitionRequired);
203 }
204 
205 ASTMutationListener *MultiplexConsumer::GetASTMutationListener() {
206   return MutationListener.get();
207 }
208 
209 ASTDeserializationListener *MultiplexConsumer::GetASTDeserializationListener() {
210   return DeserializationListener.get();
211 }
212 
213 void MultiplexConsumer::PrintStats() {
214   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
215     Consumers[i]->PrintStats();
216 }
217 
218 void MultiplexConsumer::InitializeSema(Sema &S) {
219   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
220     if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
221       SC->InitializeSema(S);
222 }
223 
224 void MultiplexConsumer::ForgetSema() {
225   for (size_t i = 0, e = Consumers.size(); i != e; ++i)
226     if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
227       SC->ForgetSema();
228 }
229