Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Basic/Module.h
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Source (jump to first uncovered line)
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//===- Module.h - Describe a module -----------------------------*- C++ -*-===//
2
//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
7
//===----------------------------------------------------------------------===//
8
//
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/// \file
10
/// Defines the clang::Module class, which describes a module in the
11
/// source code.
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//
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//===----------------------------------------------------------------------===//
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15
#ifndef LLVM_CLANG_BASIC_MODULE_H
16
#define LLVM_CLANG_BASIC_MODULE_H
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18
#include "clang/Basic/FileManager.h"
19
#include "clang/Basic/SourceLocation.h"
20
#include "llvm/ADT/ArrayRef.h"
21
#include "llvm/ADT/DenseSet.h"
22
#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/PointerIntPair.h"
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#include "llvm/ADT/PointerUnion.h"
25
#include "llvm/ADT/SetVector.h"
26
#include "llvm/ADT/SmallVector.h"
27
#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
30
#include "llvm/ADT/iterator_range.h"
31
#include <array>
32
#include <cassert>
33
#include <cstdint>
34
#include <ctime>
35
#include <string>
36
#include <utility>
37
#include <vector>
38
39
namespace llvm {
40
41
class raw_ostream;
42
43
} // namespace llvm
44
45
namespace clang {
46
47
class LangOptions;
48
class TargetInfo;
49
50
/// Describes the name of a module.
51
using ModuleId = SmallVector<std::pair<std::string, SourceLocation>, 2>;
52
53
/// The signature of a module, which is a hash of the AST content.
54
struct ASTFileSignature : std::array<uint32_t, 5> {
55
  ASTFileSignature(std::array<uint32_t, 5> S = {{0}})
56
145k
      : std::array<uint32_t, 5>(std::move(S)) {}
57
58
10.1k
  explicit operator bool() const {
59
10.1k
    return *this != std::array<uint32_t, 5>({{0}});
60
10.1k
  }
61
};
62
63
/// Describes a module or submodule.
64
class Module {
65
public:
66
  /// The name of this module.
67
  std::string Name;
68
69
  /// The location of the module definition.
70
  SourceLocation DefinitionLoc;
71
72
  enum ModuleKind {
73
    /// This is a module that was defined by a module map and built out
74
    /// of header files.
75
    ModuleMapModule,
76
77
    /// This is a C++ Modules TS module interface unit.
78
    ModuleInterfaceUnit,
79
80
    /// This is a fragment of the global module within some C++ module.
81
    GlobalModuleFragment,
82
83
    /// This is the private module fragment within some C++ module.
84
    PrivateModuleFragment,
85
  };
86
87
  /// The kind of this module.
88
  ModuleKind Kind = ModuleMapModule;
89
90
  /// The parent of this module. This will be NULL for the top-level
91
  /// module.
92
  Module *Parent;
93
94
  /// The build directory of this module. This is the directory in
95
  /// which the module is notionally built, and relative to which its headers
96
  /// are found.
97
  const DirectoryEntry *Directory = nullptr;
98
99
  /// The presumed file name for the module map defining this module.
100
  /// Only non-empty when building from preprocessed source.
101
  std::string PresumedModuleMapFile;
102
103
  /// The umbrella header or directory.
104
  llvm::PointerUnion<const DirectoryEntry *, const FileEntry *> Umbrella;
105
106
  /// The module signature.
107
  ASTFileSignature Signature;
108
109
  /// The name of the umbrella entry, as written in the module map.
110
  std::string UmbrellaAsWritten;
111
112
  /// The module through which entities defined in this module will
113
  /// eventually be exposed, for use in "private" modules.
114
  std::string ExportAsModule;
115
116
  /// Does this Module scope describe part of the purview of a named C++ module?
117
96.9k
  bool isModulePurview() const {
118
96.9k
    return Kind == ModuleInterfaceUnit || 
Kind == PrivateModuleFragment96.0k
;
119
96.9k
  }
120
121
private:
122
  /// The submodules of this module, indexed by name.
123
  std::vector<Module *> SubModules;
124
125
  /// A mapping from the submodule name to the index into the
126
  /// \c SubModules vector at which that submodule resides.
127
  llvm::StringMap<unsigned> SubModuleIndex;
128
129
  /// The AST file if this is a top-level module which has a
130
  /// corresponding serialized AST file, or null otherwise.
131
  const FileEntry *ASTFile = nullptr;
132
133
  /// The top-level headers associated with this module.
134
  llvm::SmallSetVector<const FileEntry *, 2> TopHeaders;
135
136
  /// top-level header filenames that aren't resolved to FileEntries yet.
137
  std::vector<std::string> TopHeaderNames;
138
139
  /// Cache of modules visible to lookup in this module.
140
  mutable llvm::DenseSet<const Module*> VisibleModulesCache;
141
142
  /// The ID used when referencing this module within a VisibleModuleSet.
143
  unsigned VisibilityID;
144
145
public:
146
  enum HeaderKind {
147
    HK_Normal,
148
    HK_Textual,
149
    HK_Private,
150
    HK_PrivateTextual,
151
    HK_Excluded
152
  };
153
  static const int NumHeaderKinds = HK_Excluded + 1;
154
155
  /// Information about a header directive as found in the module map
156
  /// file.
157
  struct Header {
158
    std::string NameAsWritten;
159
    const FileEntry *Entry;
160
161
18.6k
    explicit operator bool() { return Entry; }
162
  };
163
164
  /// Information about a directory name as found in the module map
165
  /// file.
166
  struct DirectoryName {
167
    std::string NameAsWritten;
168
    const DirectoryEntry *Entry;
169
170
6.75k
    explicit operator bool() { return Entry; }
171
  };
172
173
  /// The headers that are part of this module.
174
  SmallVector<Header, 2> Headers[5];
175
176
  /// Stored information about a header directive that was found in the
177
  /// module map file but has not been resolved to a file.
178
  struct UnresolvedHeaderDirective {
179
    HeaderKind Kind = HK_Normal;
180
    SourceLocation FileNameLoc;
181
    std::string FileName;
182
    bool IsUmbrella = false;
183
    bool HasBuiltinHeader = false;
184
    Optional<off_t> Size;
185
    Optional<time_t> ModTime;
186
  };
187
188
  /// Headers that are mentioned in the module map file but that we have not
189
  /// yet attempted to resolve to a file on the file system.
190
  SmallVector<UnresolvedHeaderDirective, 1> UnresolvedHeaders;
191
192
  /// Headers that are mentioned in the module map file but could not be
193
  /// found on the file system.
194
  SmallVector<UnresolvedHeaderDirective, 1> MissingHeaders;
195
196
  /// An individual requirement: a feature name and a flag indicating
197
  /// the required state of that feature.
198
  using Requirement = std::pair<std::string, bool>;
199
200
  /// The set of language features required to use this module.
201
  ///
202
  /// If any of these requirements are not available, the \c IsAvailable bit
203
  /// will be false to indicate that this (sub)module is not available.
204
  SmallVector<Requirement, 2> Requirements;
205
206
  /// A module with the same name that shadows this module.
207
  Module *ShadowingModule = nullptr;
208
209
  /// Whether this module is missing a feature from \c Requirements.
210
  unsigned IsMissingRequirement : 1;
211
212
  /// Whether we tried and failed to load a module file for this module.
213
  unsigned HasIncompatibleModuleFile : 1;
214
215
  /// Whether this module is available in the current translation unit.
216
  ///
217
  /// If the module is missing headers or does not meet all requirements then
218
  /// this bit will be 0.
219
  unsigned IsAvailable : 1;
220
221
  /// Whether this module was loaded from a module file.
222
  unsigned IsFromModuleFile : 1;
223
224
  /// Whether this is a framework module.
225
  unsigned IsFramework : 1;
226
227
  /// Whether this is an explicit submodule.
228
  unsigned IsExplicit : 1;
229
230
  /// Whether this is a "system" module (which assumes that all
231
  /// headers in it are system headers).
232
  unsigned IsSystem : 1;
233
234
  /// Whether this is an 'extern "C"' module (which implicitly puts all
235
  /// headers in it within an 'extern "C"' block, and allows the module to be
236
  /// imported within such a block).
237
  unsigned IsExternC : 1;
238
239
  /// Whether this is an inferred submodule (module * { ... }).
240
  unsigned IsInferred : 1;
241
242
  /// Whether we should infer submodules for this module based on
243
  /// the headers.
244
  ///
245
  /// Submodules can only be inferred for modules with an umbrella header.
246
  unsigned InferSubmodules : 1;
247
248
  /// Whether, when inferring submodules, the inferred submodules
249
  /// should be explicit.
250
  unsigned InferExplicitSubmodules : 1;
251
252
  /// Whether, when inferring submodules, the inferr submodules should
253
  /// export all modules they import (e.g., the equivalent of "export *").
254
  unsigned InferExportWildcard : 1;
255
256
  /// Whether the set of configuration macros is exhaustive.
257
  ///
258
  /// When the set of configuration macros is exhaustive, meaning
259
  /// that no identifier not in this list should affect how the module is
260
  /// built.
261
  unsigned ConfigMacrosExhaustive : 1;
262
263
  /// Whether files in this module can only include non-modular headers
264
  /// and headers from used modules.
265
  unsigned NoUndeclaredIncludes : 1;
266
267
  /// Whether this module came from a "private" module map, found next
268
  /// to a regular (public) module map.
269
  unsigned ModuleMapIsPrivate : 1;
270
271
  /// Describes the visibility of the various names within a
272
  /// particular module.
273
  enum NameVisibilityKind {
274
    /// All of the names in this module are hidden.
275
    Hidden,
276
    /// All of the names in this module are visible.
277
    AllVisible
278
  };
279
280
  /// The visibility of names within this particular module.
281
  NameVisibilityKind NameVisibility;
282
283
  /// The location of the inferred submodule.
284
  SourceLocation InferredSubmoduleLoc;
285
286
  /// The set of modules imported by this module, and on which this
287
  /// module depends.
288
  llvm::SmallSetVector<Module *, 2> Imports;
289
290
  /// Describes an exported module.
291
  ///
292
  /// The pointer is the module being re-exported, while the bit will be true
293
  /// to indicate that this is a wildcard export.
294
  using ExportDecl = llvm::PointerIntPair<Module *, 1, bool>;
295
296
  /// The set of export declarations.
297
  SmallVector<ExportDecl, 2> Exports;
298
299
  /// Describes an exported module that has not yet been resolved
300
  /// (perhaps because the module it refers to has not yet been loaded).
301
  struct UnresolvedExportDecl {
302
    /// The location of the 'export' keyword in the module map file.
303
    SourceLocation ExportLoc;
304
305
    /// The name of the module.
306
    ModuleId Id;
307
308
    /// Whether this export declaration ends in a wildcard, indicating
309
    /// that all of its submodules should be exported (rather than the named
310
    /// module itself).
311
    bool Wildcard;
312
  };
313
314
  /// The set of export declarations that have yet to be resolved.
315
  SmallVector<UnresolvedExportDecl, 2> UnresolvedExports;
316
317
  /// The directly used modules.
318
  SmallVector<Module *, 2> DirectUses;
319
320
  /// The set of use declarations that have yet to be resolved.
321
  SmallVector<ModuleId, 2> UnresolvedDirectUses;
322
323
  /// A library or framework to link against when an entity from this
324
  /// module is used.
325
  struct LinkLibrary {
326
    LinkLibrary() = default;
327
    LinkLibrary(const std::string &Library, bool IsFramework)
328
3.19k
        : Library(Library), IsFramework(IsFramework) {}
329
330
    /// The library to link against.
331
    ///
332
    /// This will typically be a library or framework name, but can also
333
    /// be an absolute path to the library or framework.
334
    std::string Library;
335
336
    /// Whether this is a framework rather than a library.
337
    bool IsFramework = false;
338
  };
339
340
  /// The set of libraries or frameworks to link against when
341
  /// an entity from this module is used.
342
  llvm::SmallVector<LinkLibrary, 2> LinkLibraries;
343
344
  /// Autolinking uses the framework name for linking purposes
345
  /// when this is false and the export_as name otherwise.
346
  bool UseExportAsModuleLinkName = false;
347
348
  /// The set of "configuration macros", which are macros that
349
  /// (intentionally) change how this module is built.
350
  std::vector<std::string> ConfigMacros;
351
352
  /// An unresolved conflict with another module.
353
  struct UnresolvedConflict {
354
    /// The (unresolved) module id.
355
    ModuleId Id;
356
357
    /// The message provided to the user when there is a conflict.
358
    std::string Message;
359
  };
360
361
  /// The list of conflicts for which the module-id has not yet been
362
  /// resolved.
363
  std::vector<UnresolvedConflict> UnresolvedConflicts;
364
365
  /// A conflict between two modules.
366
  struct Conflict {
367
    /// The module that this module conflicts with.
368
    Module *Other;
369
370
    /// The message provided to the user when there is a conflict.
371
    std::string Message;
372
  };
373
374
  /// The list of conflicts.
375
  std::vector<Conflict> Conflicts;
376
377
  /// Construct a new module or submodule.
378
  Module(StringRef Name, SourceLocation DefinitionLoc, Module *Parent,
379
         bool IsFramework, bool IsExplicit, unsigned VisibilityID);
380
381
  ~Module();
382
383
  /// Determine whether this module is available for use within the
384
  /// current translation unit.
385
60.9k
  bool isAvailable() const { return IsAvailable; }
386
387
  /// Determine whether this module is available for use within the
388
  /// current translation unit.
389
  ///
390
  /// \param LangOpts The language options used for the current
391
  /// translation unit.
392
  ///
393
  /// \param Target The target options used for the current translation unit.
394
  ///
395
  /// \param Req If this module is unavailable because of a missing requirement,
396
  /// this parameter will be set to one of the requirements that is not met for
397
  /// use of this module.
398
  ///
399
  /// \param MissingHeader If this module is unavailable because of a missing
400
  /// header, this parameter will be set to one of the missing headers.
401
  ///
402
  /// \param ShadowingModule If this module is unavailable because it is
403
  /// shadowed, this parameter will be set to the shadowing module.
404
  bool isAvailable(const LangOptions &LangOpts,
405
                   const TargetInfo &Target,
406
                   Requirement &Req,
407
                   UnresolvedHeaderDirective &MissingHeader,
408
                   Module *&ShadowingModule) const;
409
410
  /// Determine whether this module is a submodule.
411
0
  bool isSubModule() const { return Parent != nullptr; }
412
413
  /// Determine whether this module is a submodule of the given other
414
  /// module.
415
  bool isSubModuleOf(const Module *Other) const;
416
417
  /// Determine whether this module is a part of a framework,
418
  /// either because it is a framework module or because it is a submodule
419
  /// of a framework module.
420
193k
  bool isPartOfFramework() const {
421
458k
    for (const Module *Mod = this; Mod; 
Mod = Mod->Parent264k
)
422
268k
      if (Mod->IsFramework)
423
4.20k
        return true;
424
193k
425
193k
    
return false189k
;
426
193k
  }
427
428
  /// Determine whether this module is a subframework of another
429
  /// framework.
430
1.18k
  bool isSubFramework() const {
431
1.18k
    return IsFramework && Parent && 
Parent->isPartOfFramework()345
;
432
1.18k
  }
433
434
  /// Set the parent of this module. This should only be used if the parent
435
  /// could not be set during module creation.
436
66
  void setParent(Module *M) {
437
66
    assert(!Parent);
438
66
    Parent = M;
439
66
    Parent->SubModuleIndex[Name] = Parent->SubModules.size();
440
66
    Parent->SubModules.push_back(this);
441
66
  }
442
443
  /// Retrieve the full name of this module, including the path from
444
  /// its top-level module.
445
  /// \param AllowStringLiterals If \c true, components that might not be
446
  ///        lexically valid as identifiers will be emitted as string literals.
447
  std::string getFullModuleName(bool AllowStringLiterals = false) const;
448
449
  /// Whether the full name of this module is equal to joining
450
  /// \p nameParts with "."s.
451
  ///
452
  /// This is more efficient than getFullModuleName().
453
  bool fullModuleNameIs(ArrayRef<StringRef> nameParts) const;
454
455
  /// Retrieve the top-level module for this (sub)module, which may
456
  /// be this module.
457
80.3k
  Module *getTopLevelModule() {
458
80.3k
    return const_cast<Module *>(
459
80.3k
             const_cast<const Module *>(this)->getTopLevelModule());
460
80.3k
  }
461
462
  /// Retrieve the top-level module for this (sub)module, which may
463
  /// be this module.
464
  const Module *getTopLevelModule() const;
465
466
  /// Retrieve the name of the top-level module.
467
9.83k
  StringRef getTopLevelModuleName() const {
468
9.83k
    return getTopLevelModule()->Name;
469
9.83k
  }
470
471
  /// The serialized AST file for this module, if one was created.
472
15.5k
  const FileEntry *getASTFile() const {
473
15.5k
    return getTopLevelModule()->ASTFile;
474
15.5k
  }
475
476
  /// Set the serialized AST file for the top-level module of this module.
477
3.57k
  void setASTFile(const FileEntry *File) {
478
3.57k
    assert((File == nullptr || getASTFile() == nullptr ||
479
3.57k
            getASTFile() == File) && "file path changed");
480
3.57k
    getTopLevelModule()->ASTFile = File;
481
3.57k
  }
482
483
  /// Retrieve the directory for which this module serves as the
484
  /// umbrella.
485
  DirectoryName getUmbrellaDir() const;
486
487
  /// Retrieve the header that serves as the umbrella header for this
488
  /// module.
489
19.0k
  Header getUmbrellaHeader() const {
490
19.0k
    if (auto *E = Umbrella.dyn_cast<const FileEntry *>())
491
3.11k
      return Header{UmbrellaAsWritten, E};
492
15.9k
    return Header{};
493
15.9k
  }
494
495
  /// Determine whether this module has an umbrella directory that is
496
  /// not based on an umbrella header.
497
0
  bool hasUmbrellaDir() const {
498
0
    return Umbrella && Umbrella.is<const DirectoryEntry *>();
499
0
  }
500
501
  /// Add a top-level header associated with this module.
502
2.49k
  void addTopHeader(const FileEntry *File) {
503
2.49k
    assert(File);
504
2.49k
    TopHeaders.insert(File);
505
2.49k
  }
506
507
  /// Add a top-level header filename associated with this module.
508
5.12k
  void addTopHeaderFilename(StringRef Filename) {
509
5.12k
    TopHeaderNames.push_back(Filename);
510
5.12k
  }
511
512
  /// The top-level headers associated with this module.
513
  ArrayRef<const FileEntry *> getTopHeaders(FileManager &FileMgr);
514
515
  /// Determine whether this module has declared its intention to
516
  /// directly use another module.
517
  bool directlyUses(const Module *Requested) const;
518
519
  /// Add the given feature requirement to the list of features
520
  /// required by this module.
521
  ///
522
  /// \param Feature The feature that is required by this module (and
523
  /// its submodules).
524
  ///
525
  /// \param RequiredState The required state of this feature: \c true
526
  /// if it must be present, \c false if it must be absent.
527
  ///
528
  /// \param LangOpts The set of language options that will be used to
529
  /// evaluate the availability of this feature.
530
  ///
531
  /// \param Target The target options that will be used to evaluate the
532
  /// availability of this feature.
533
  void addRequirement(StringRef Feature, bool RequiredState,
534
                      const LangOptions &LangOpts,
535
                      const TargetInfo &Target);
536
537
  /// Mark this module and all of its submodules as unavailable.
538
  void markUnavailable(bool MissingRequirement = false);
539
540
  /// Find the submodule with the given name.
541
  ///
542
  /// \returns The submodule if found, or NULL otherwise.
543
  Module *findSubmodule(StringRef Name) const;
544
  Module *findOrInferSubmodule(StringRef Name);
545
546
  /// Determine whether the specified module would be visible to
547
  /// a lookup at the end of this module.
548
  ///
549
  /// FIXME: This may return incorrect results for (submodules of) the
550
  /// module currently being built, if it's queried before we see all
551
  /// of its imports.
552
157
  bool isModuleVisible(const Module *M) const {
553
157
    if (VisibleModulesCache.empty())
554
23
      buildVisibleModulesCache();
555
157
    return VisibleModulesCache.count(M);
556
157
  }
557
558
93.3k
  unsigned getVisibilityID() const { return VisibilityID; }
559
560
  using submodule_iterator = std::vector<Module *>::iterator;
561
  using submodule_const_iterator = std::vector<Module *>::const_iterator;
562
563
136k
  submodule_iterator submodule_begin() { return SubModules.begin(); }
564
3.77k
  submodule_const_iterator submodule_begin() const {return SubModules.begin();}
565
136k
  submodule_iterator submodule_end()   { return SubModules.end(); }
566
3.77k
  submodule_const_iterator submodule_end() const { return SubModules.end(); }
567
568
3.60k
  llvm::iterator_range<submodule_iterator> submodules() {
569
3.60k
    return llvm::make_range(submodule_begin(), submodule_end());
570
3.60k
  }
571
3.59k
  llvm::iterator_range<submodule_const_iterator> submodules() const {
572
3.59k
    return llvm::make_range(submodule_begin(), submodule_end());
573
3.59k
  }
574
575
  /// Appends this module's list of exported modules to \p Exported.
576
  ///
577
  /// This provides a subset of immediately imported modules (the ones that are
578
  /// directly exported), not the complete set of exported modules.
579
  void getExportedModules(SmallVectorImpl<Module *> &Exported) const;
580
581
1.40k
  static StringRef getModuleInputBufferName() {
582
1.40k
    return "<module-includes>";
583
1.40k
  }
584
585
  /// Print the module map for this module to the given stream.
586
  void print(raw_ostream &OS, unsigned Indent = 0) const;
587
588
  /// Dump the contents of this module to the given output stream.
589
  void dump() const;
590
591
private:
592
  void buildVisibleModulesCache() const;
593
};
594
595
/// A set of visible modules.
596
class VisibleModuleSet {
597
public:
598
89.0k
  VisibleModuleSet() = default;
599
  VisibleModuleSet(VisibleModuleSet &&O)
600
3.46k
      : ImportLocs(std::move(O.ImportLocs)), Generation(O.Generation ? 1 : 0) {
601
3.46k
    O.ImportLocs.clear();
602
3.46k
    ++O.Generation;
603
3.46k
  }
604
605
  /// Move from another visible modules set. Guaranteed to leave the source
606
  /// empty and bump the generation on both.
607
544
  VisibleModuleSet &operator=(VisibleModuleSet &&O) {
608
544
    ImportLocs = std::move(O.ImportLocs);
609
544
    O.ImportLocs.clear();
610
544
    ++O.Generation;
611
544
    ++Generation;
612
544
    return *this;
613
544
  }
614
615
  /// Get the current visibility generation. Incremented each time the
616
  /// set of visible modules changes in any way.
617
680k
  unsigned getGeneration() const { return Generation; }
618
619
  /// Determine whether a module is visible.
620
45.2k
  bool isVisible(const Module *M) const {
621
45.2k
    return getImportLoc(M).isValid();
622
45.2k
  }
623
624
  /// Get the location at which the import of a module was triggered.
625
45.3k
  SourceLocation getImportLoc(const Module *M) const {
626
45.3k
    return M->getVisibilityID() < ImportLocs.size()
627
45.3k
               ? 
ImportLocs[M->getVisibilityID()]31.5k
628
45.3k
               : 
SourceLocation()13.7k
;
629
45.3k
  }
630
631
  /// A callback to call when a module is made visible (directly or
632
  /// indirectly) by a call to \ref setVisible.
633
  using VisibleCallback = llvm::function_ref<void(Module *M)>;
634
635
  /// A callback to call when a module conflict is found. \p Path
636
  /// consists of a sequence of modules from the conflicting module to the one
637
  /// made visible, where each was exported by the next.
638
  using ConflictCallback =
639
      llvm::function_ref<void(ArrayRef<Module *> Path, Module *Conflict,
640
                         StringRef Message)>;
641
642
  /// Make a specific module visible.
643
  void setVisible(Module *M, SourceLocation Loc,
644
6.84k
                  VisibleCallback Vis = [](Module *) {},
645
                  ConflictCallback Cb = [](ArrayRef<Module *>, Module *,
646
1
                                           StringRef) {});
647
648
private:
649
  /// Import locations for each visible module. Indexed by the module's
650
  /// VisibilityID.
651
  std::vector<SourceLocation> ImportLocs;
652
653
  /// Visibility generation, bumped every time the visibility state changes.
654
  unsigned Generation = 0;
655
};
656
657
} // namespace clang
658
659
#endif // LLVM_CLANG_BASIC_MODULE_H