1 //===--- ModuleMap.h - Describe the layout of modules -----------*- 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 ModuleMap interface, which describes the layout of a
11 // module as it relates to headers.
13 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_CLANG_LEX_MODULEMAP_H
17 #define LLVM_CLANG_LEX_MODULEMAP_H
19 #include "clang/Basic/LangOptions.h"
20 #include "clang/Basic/Module.h"
21 #include "clang/Basic/SourceManager.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/ADT/IntrusiveRefCntPtr.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/ADT/StringMap.h"
26 #include "llvm/ADT/StringRef.h"
34 class DiagnosticConsumer;
35 class DiagnosticsEngine;
37 class ModuleMapParser;
40 SourceManager *SourceMgr;
41 IntrusiveRefCntPtr<DiagnosticsEngine> Diags;
42 const LangOptions &LangOpts;
43 const TargetInfo *Target;
44 HeaderSearch &HeaderInfo;
46 /// \brief The directory used for Clang-supplied, builtin include headers,
47 /// such as "stdint.h".
48 const DirectoryEntry *BuiltinIncludeDir;
50 /// \brief Language options used to parse the module map itself.
52 /// These are always simple C language options.
53 LangOptions MMapLangOpts;
55 /// \brief The top-level modules that are known.
56 llvm::StringMap<Module *> Modules;
58 /// \brief A header that is known to reside within a given module,
59 /// whether it was included or excluded.
61 llvm::PointerIntPair<Module *, 1, bool> Storage;
64 KnownHeader() : Storage(0, false) { }
65 KnownHeader(Module *M, bool Excluded) : Storage(M, Excluded) { }
67 /// \brief Retrieve the module the header is stored in.
68 Module *getModule() const { return Storage.getPointer(); }
70 /// \brief Whether this header is explicitly excluded from the module.
71 bool isExcluded() const { return Storage.getInt(); }
73 /// \brief Whether this header is available in the module.
74 bool isAvailable() const {
75 return !isExcluded() && getModule()->isAvailable();
78 // \brief Whether this known header is valid (i.e., it has an
79 // associated module).
80 operator bool() const { return Storage.getPointer() != 0; }
83 typedef llvm::DenseMap<const FileEntry *, KnownHeader> HeadersMap;
85 /// \brief Mapping from each header to the module that owns the contents of the
89 /// \brief Mapping from directories with umbrella headers to the module
90 /// that is generated from the umbrella header.
92 /// This mapping is used to map headers that haven't explicitly been named
93 /// in the module map over to the module that includes them via its umbrella
95 llvm::DenseMap<const DirectoryEntry *, Module *> UmbrellaDirs;
97 /// \brief A directory for which framework modules can be inferred.
98 struct InferredDirectory {
99 InferredDirectory() : InferModules(), InferSystemModules() { }
101 /// \brief Whether to infer modules from this directory.
102 unsigned InferModules : 1;
104 /// \brief Whether the modules we infer are [system] modules.
105 unsigned InferSystemModules : 1;
107 /// \brief The names of modules that cannot be inferred within this
109 SmallVector<std::string, 2> ExcludedModules;
112 /// \brief A mapping from directories to information about inferring
113 /// framework modules from within those directories.
114 llvm::DenseMap<const DirectoryEntry *, InferredDirectory> InferredDirectories;
116 /// \brief Describes whether we haved parsed a particular file as a module
118 llvm::DenseMap<const FileEntry *, bool> ParsedModuleMap;
120 friend class ModuleMapParser;
122 /// \brief Resolve the given export declaration into an actual export
125 /// \param Mod The module in which we're resolving the export declaration.
127 /// \param Unresolved The export declaration to resolve.
129 /// \param Complain Whether this routine should complain about unresolvable
132 /// \returns The resolved export declaration, which will have a NULL pointer
133 /// if the export could not be resolved.
135 resolveExport(Module *Mod, const Module::UnresolvedExportDecl &Unresolved,
136 bool Complain) const;
138 /// \brief Resolve the given module id to an actual module.
140 /// \param Id The module-id to resolve.
142 /// \param Mod The module in which we're resolving the module-id.
144 /// \param Complain Whether this routine should complain about unresolvable
147 /// \returns The resolved module, or null if the module-id could not be
149 Module *resolveModuleId(const ModuleId &Id, Module *Mod, bool Complain) const;
152 /// \brief Construct a new module map.
154 /// \param FileMgr The file manager used to find module files and headers.
155 /// This file manager should be shared with the header-search mechanism, since
156 /// they will refer to the same headers.
158 /// \param DC A diagnostic consumer that will be cloned for use in generating
161 /// \param LangOpts Language options for this translation unit.
163 /// \param Target The target for this translation unit.
164 ModuleMap(FileManager &FileMgr, DiagnosticConsumer &DC,
165 const LangOptions &LangOpts, const TargetInfo *Target,
166 HeaderSearch &HeaderInfo);
168 /// \brief Destroy the module map.
172 /// \brief Set the target information.
173 void setTarget(const TargetInfo &Target);
175 /// \brief Set the directory that contains Clang-supplied include
176 /// files, such as our stdarg.h or tgmath.h.
177 void setBuiltinIncludeDir(const DirectoryEntry *Dir) {
178 BuiltinIncludeDir = Dir;
181 /// \brief Retrieve the module that owns the given header file, if any.
183 /// \param File The header file that is likely to be included.
185 /// \returns The module that owns the given header file, or null to indicate
186 /// that no module owns this header file.
187 Module *findModuleForHeader(const FileEntry *File);
189 /// \brief Determine whether the given header is part of a module
190 /// marked 'unavailable'.
191 bool isHeaderInUnavailableModule(const FileEntry *Header) const;
193 /// \brief Retrieve a module with the given name.
195 /// \param Name The name of the module to look up.
197 /// \returns The named module, if known; otherwise, returns null.
198 Module *findModule(StringRef Name) const;
200 /// \brief Retrieve a module with the given name using lexical name lookup,
201 /// starting at the given context.
203 /// \param Name The name of the module to look up.
205 /// \param Context The module context, from which we will perform lexical
208 /// \returns The named module, if known; otherwise, returns null.
209 Module *lookupModuleUnqualified(StringRef Name, Module *Context) const;
211 /// \brief Retrieve a module with the given name within the given context,
212 /// using direct (qualified) name lookup.
214 /// \param Name The name of the module to look up.
216 /// \param Context The module for which we will look for a submodule. If
217 /// null, we will look for a top-level module.
219 /// \returns The named submodule, if known; otherwose, returns null.
220 Module *lookupModuleQualified(StringRef Name, Module *Context) const;
222 /// \brief Find a new module or submodule, or create it if it does not already
225 /// \param Name The name of the module to find or create.
227 /// \param Parent The module that will act as the parent of this submodule,
228 /// or NULL to indicate that this is a top-level module.
230 /// \param IsFramework Whether this is a framework module.
232 /// \param IsExplicit Whether this is an explicit submodule.
234 /// \returns The found or newly-created module, along with a boolean value
235 /// that will be true if the module is newly-created.
236 std::pair<Module *, bool> findOrCreateModule(StringRef Name, Module *Parent,
240 /// \brief Determine whether we can infer a framework module a framework
241 /// with the given name in the given
243 /// \param ParentDir The directory that is the parent of the framework
246 /// \param Name The name of the module.
248 /// \param IsSystem Will be set to 'true' if the inferred module must be a
251 /// \returns true if we are allowed to infer a framework module, and false
253 bool canInferFrameworkModule(const DirectoryEntry *ParentDir,
254 StringRef Name, bool &IsSystem) const;
256 /// \brief Infer the contents of a framework module map from the given
257 /// framework directory.
258 Module *inferFrameworkModule(StringRef ModuleName,
259 const DirectoryEntry *FrameworkDir,
260 bool IsSystem, Module *Parent);
262 /// \brief Retrieve the module map file containing the definition of the given
265 /// \param Module The module whose module map file will be returned, if known.
267 /// \returns The file entry for the module map file containing the given
268 /// module, or NULL if the module definition was inferred.
269 const FileEntry *getContainingModuleMapFile(Module *Module) const;
271 /// \brief Resolve all of the unresolved exports in the given module.
273 /// \param Mod The module whose exports should be resolved.
275 /// \param Complain Whether to emit diagnostics for failures.
277 /// \returns true if any errors were encountered while resolving exports,
279 bool resolveExports(Module *Mod, bool Complain);
281 /// \brief Resolve all of the unresolved conflicts in the given module.
283 /// \param Mod The module whose conflicts should be resolved.
285 /// \param Complain Whether to emit diagnostics for failures.
287 /// \returns true if any errors were encountered while resolving conflicts,
289 bool resolveConflicts(Module *Mod, bool Complain);
291 /// \brief Infers the (sub)module based on the given source location and
294 /// \param Loc The location within the source that we are querying, along
295 /// with its source manager.
297 /// \returns The module that owns this source location, or null if no
298 /// module owns this source location.
299 Module *inferModuleFromLocation(FullSourceLoc Loc);
301 /// \brief Sets the umbrella header of the given module to the given
303 void setUmbrellaHeader(Module *Mod, const FileEntry *UmbrellaHeader);
305 /// \brief Sets the umbrella directory of the given module to the given
307 void setUmbrellaDir(Module *Mod, const DirectoryEntry *UmbrellaDir);
309 /// \brief Adds this header to the given module.
310 /// \param Excluded Whether this header is explicitly excluded from the
311 /// module; otherwise, it's included in the module.
312 void addHeader(Module *Mod, const FileEntry *Header, bool Excluded);
314 /// \brief Parse the given module map file, and record any modules we
317 /// \param File The file to be parsed.
319 /// \returns true if an error occurred, false otherwise.
320 bool parseModuleMapFile(const FileEntry *File);
322 /// \brief Dump the contents of the module map, for debugging purposes.
325 typedef llvm::StringMap<Module *>::const_iterator module_iterator;
326 module_iterator module_begin() const { return Modules.begin(); }
327 module_iterator module_end() const { return Modules.end(); }