1 //===--- Module.h - Describe a module ---------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the Module class, which describes a module in the source
13 //===----------------------------------------------------------------------===//
14 #include "clang/Basic/Module.h"
15 #include "clang/Basic/FileManager.h"
16 #include "clang/Basic/LangOptions.h"
17 #include "clang/Basic/TargetInfo.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Support/raw_ostream.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/StringSwitch.h"
22 using namespace clang;
24 Module::Module(StringRef Name, SourceLocation DefinitionLoc, Module *Parent,
25 bool IsFramework, bool IsExplicit)
26 : Name(Name), DefinitionLoc(DefinitionLoc), Parent(Parent),
27 Umbrella(), ASTFile(0), IsAvailable(true), IsFromModuleFile(false),
28 IsFramework(IsFramework), IsExplicit(IsExplicit), IsSystem(false),
29 InferSubmodules(false), InferExplicitSubmodules(false),
30 InferExportWildcard(false), NameVisibility(Hidden)
33 if (!Parent->isAvailable())
38 Parent->SubModuleIndex[Name] = Parent->SubModules.size();
39 Parent->SubModules.push_back(this);
44 for (submodule_iterator I = submodule_begin(), IEnd = submodule_end();
51 /// \brief Determine whether a translation unit built using the current
52 /// language options has the given feature.
53 static bool hasFeature(StringRef Feature, const LangOptions &LangOpts,
54 const TargetInfo &Target) {
55 return llvm::StringSwitch<bool>(Feature)
56 .Case("altivec", LangOpts.AltiVec)
57 .Case("blocks", LangOpts.Blocks)
58 .Case("cplusplus", LangOpts.CPlusPlus)
59 .Case("cplusplus11", LangOpts.CPlusPlus0x)
60 .Case("objc", LangOpts.ObjC1)
61 .Case("objc_arc", LangOpts.ObjCAutoRefCount)
62 .Case("opencl", LangOpts.OpenCL)
63 .Case("tls", Target.isTLSSupported())
64 .Default(Target.hasFeature(Feature));
68 Module::isAvailable(const LangOptions &LangOpts, const TargetInfo &Target,
69 StringRef &Feature) const {
73 for (const Module *Current = this; Current; Current = Current->Parent) {
74 for (unsigned I = 0, N = Current->Requires.size(); I != N; ++I) {
75 if (!hasFeature(Current->Requires[I], LangOpts, Target)) {
76 Feature = Current->Requires[I];
82 llvm_unreachable("could not find a reason why module is unavailable");
85 bool Module::isSubModuleOf(Module *Other) const {
86 const Module *This = this;
97 const Module *Module::getTopLevelModule() const {
98 const Module *Result = this;
99 while (Result->Parent)
100 Result = Result->Parent;
105 std::string Module::getFullModuleName() const {
106 llvm::SmallVector<StringRef, 2> Names;
108 // Build up the set of module names (from innermost to outermost).
109 for (const Module *M = this; M; M = M->Parent)
110 Names.push_back(M->Name);
113 for (llvm::SmallVector<StringRef, 2>::reverse_iterator I = Names.rbegin(),
125 const DirectoryEntry *Module::getUmbrellaDir() const {
126 if (const FileEntry *Header = getUmbrellaHeader())
127 return Header->getDir();
129 return Umbrella.dyn_cast<const DirectoryEntry *>();
132 void Module::addRequirement(StringRef Feature, const LangOptions &LangOpts,
133 const TargetInfo &Target) {
134 Requires.push_back(Feature);
136 // If this feature is currently available, we're done.
137 if (hasFeature(Feature, LangOpts, Target))
143 llvm::SmallVector<Module *, 2> Stack;
144 Stack.push_back(this);
145 while (!Stack.empty()) {
146 Module *Current = Stack.back();
149 if (!Current->IsAvailable)
152 Current->IsAvailable = false;
153 for (submodule_iterator Sub = Current->submodule_begin(),
154 SubEnd = Current->submodule_end();
155 Sub != SubEnd; ++Sub) {
156 if ((*Sub)->IsAvailable)
157 Stack.push_back(*Sub);
162 Module *Module::findSubmodule(StringRef Name) const {
163 llvm::StringMap<unsigned>::const_iterator Pos = SubModuleIndex.find(Name);
164 if (Pos == SubModuleIndex.end())
167 return SubModules[Pos->getValue()];
170 static void printModuleId(llvm::raw_ostream &OS, const ModuleId &Id) {
171 for (unsigned I = 0, N = Id.size(); I != N; ++I) {
178 void Module::print(llvm::raw_ostream &OS, unsigned Indent) const {
184 OS << "module " << Name;
187 OS.indent(Indent + 2);
193 if (!Requires.empty()) {
194 OS.indent(Indent + 2);
196 for (unsigned I = 0, N = Requires.size(); I != N; ++I) {
204 if (const FileEntry *UmbrellaHeader = getUmbrellaHeader()) {
205 OS.indent(Indent + 2);
206 OS << "umbrella header \"";
207 OS.write_escaped(UmbrellaHeader->getName());
209 } else if (const DirectoryEntry *UmbrellaDir = getUmbrellaDir()) {
210 OS.indent(Indent + 2);
212 OS.write_escaped(UmbrellaDir->getName());
216 for (unsigned I = 0, N = Headers.size(); I != N; ++I) {
217 OS.indent(Indent + 2);
219 OS.write_escaped(Headers[I]->getName());
223 for (unsigned I = 0, N = ExcludedHeaders.size(); I != N; ++I) {
224 OS.indent(Indent + 2);
225 OS << "exclude header \"";
226 OS.write_escaped(ExcludedHeaders[I]->getName());
230 for (submodule_const_iterator MI = submodule_begin(), MIEnd = submodule_end();
232 (*MI)->print(OS, Indent + 2);
234 for (unsigned I = 0, N = Exports.size(); I != N; ++I) {
235 OS.indent(Indent + 2);
237 if (Module *Restriction = Exports[I].getPointer()) {
238 OS << Restriction->getFullModuleName();
239 if (Exports[I].getInt())
247 for (unsigned I = 0, N = UnresolvedExports.size(); I != N; ++I) {
248 OS.indent(Indent + 2);
250 printModuleId(OS, UnresolvedExports[I].Id);
251 if (UnresolvedExports[I].Wildcard) {
252 if (UnresolvedExports[I].Id.empty())
260 if (InferSubmodules) {
261 OS.indent(Indent + 2);
262 if (InferExplicitSubmodules)
264 OS << "module * {\n";
265 if (InferExportWildcard) {
266 OS.indent(Indent + 4);
269 OS.indent(Indent + 2);
277 void Module::dump() const {