/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Sema/SemaModule.cpp
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1 | | //===--- SemaModule.cpp - Semantic Analysis for Modules -------------------===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This file implements semantic analysis for modules (C++ modules syntax, |
10 | | // Objective-C modules syntax, and Clang header modules). |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #include "clang/AST/ASTConsumer.h" |
15 | | #include "clang/Lex/HeaderSearch.h" |
16 | | #include "clang/Lex/Preprocessor.h" |
17 | | #include "clang/Sema/SemaInternal.h" |
18 | | |
19 | | using namespace clang; |
20 | | using namespace sema; |
21 | | |
22 | | static void checkModuleImportContext(Sema &S, Module *M, |
23 | | SourceLocation ImportLoc, DeclContext *DC, |
24 | 123k | bool FromInclude = false) { |
25 | 123k | SourceLocation ExternCLoc; |
26 | | |
27 | 123k | if (auto *LSD = dyn_cast<LinkageSpecDecl>(DC)) { |
28 | 35.4k | switch (LSD->getLanguage()) { |
29 | 35.0k | case LinkageSpecDecl::lang_c: |
30 | 35.0k | if (ExternCLoc.isInvalid()) |
31 | 35.0k | ExternCLoc = LSD->getBeginLoc(); |
32 | 35.0k | break; |
33 | 348 | case LinkageSpecDecl::lang_cxx: |
34 | 348 | break; |
35 | 35.4k | } |
36 | 35.4k | DC = LSD->getParent(); |
37 | 35.4k | } |
38 | | |
39 | 124k | while (123k isa<LinkageSpecDecl>(DC) || isa<ExportDecl>(DC)123k ) |
40 | 956 | DC = DC->getParent(); |
41 | | |
42 | 123k | if (!isa<TranslationUnitDecl>(DC)) { |
43 | 19 | S.Diag(ImportLoc, (FromInclude && S.isModuleVisible(M)) |
44 | 19 | ? diag::ext_module_import_not_at_top_level_noop10 |
45 | 19 | : diag::err_module_import_not_at_top_level_fatal9 ) |
46 | 19 | << M->getFullModuleName() << DC; |
47 | 19 | S.Diag(cast<Decl>(DC)->getBeginLoc(), |
48 | 19 | diag::note_module_import_not_at_top_level) |
49 | 19 | << DC; |
50 | 123k | } else if (!M->IsExternC && ExternCLoc.isValid()49.4k ) { |
51 | 10 | S.Diag(ImportLoc, diag::ext_module_import_in_extern_c) |
52 | 10 | << M->getFullModuleName(); |
53 | 10 | S.Diag(ExternCLoc, diag::note_extern_c_begins_here); |
54 | 10 | } |
55 | 123k | } |
56 | | |
57 | | // We represent the primary and partition names as 'Paths' which are sections |
58 | | // of the hierarchical access path for a clang module. However for C++20 |
59 | | // the periods in a name are just another character, and we will need to |
60 | | // flatten them into a string. |
61 | 387 | static std::string stringFromPath(ModuleIdPath Path) { |
62 | 387 | std::string Name; |
63 | 387 | if (Path.empty()) |
64 | 0 | return Name; |
65 | | |
66 | 403 | for (auto &Piece : Path)387 { |
67 | 403 | if (!Name.empty()) |
68 | 16 | Name += "."; |
69 | 403 | Name += Piece.first->getName(); |
70 | 403 | } |
71 | 387 | return Name; |
72 | 387 | } |
73 | | |
74 | | Sema::DeclGroupPtrTy |
75 | 168 | Sema::ActOnGlobalModuleFragmentDecl(SourceLocation ModuleLoc) { |
76 | 168 | if (!ModuleScopes.empty() && |
77 | 168 | ModuleScopes.back().Module->Kind == Module::GlobalModuleFragment1 ) { |
78 | | // Under -std=c++2a -fmodules-ts, we can find an explicit 'module;' after |
79 | | // already implicitly entering the global module fragment. That's OK. |
80 | 1 | assert(getLangOpts().CPlusPlusModules && getLangOpts().ModulesTS && |
81 | 1 | "unexpectedly encountered multiple global module fragment decls"); |
82 | 0 | ModuleScopes.back().BeginLoc = ModuleLoc; |
83 | 1 | return nullptr; |
84 | 1 | } |
85 | | |
86 | | // We start in the global module; all those declarations are implicitly |
87 | | // module-private (though they do not have module linkage). |
88 | 167 | Module *GlobalModule = |
89 | 167 | PushGlobalModuleFragment(ModuleLoc, /*IsImplicit=*/false); |
90 | | |
91 | | // All declarations created from now on are owned by the global module. |
92 | 167 | auto *TU = Context.getTranslationUnitDecl(); |
93 | 167 | TU->setModuleOwnershipKind(Decl::ModuleOwnershipKind::Visible); |
94 | 167 | TU->setLocalOwningModule(GlobalModule); |
95 | | |
96 | | // FIXME: Consider creating an explicit representation of this declaration. |
97 | 167 | return nullptr; |
98 | 168 | } |
99 | | |
100 | 14 | void Sema::HandleStartOfHeaderUnit() { |
101 | 14 | assert(getLangOpts().CPlusPlusModules && |
102 | 14 | "Header units are only valid for C++20 modules"); |
103 | 0 | SourceLocation StartOfTU = |
104 | 14 | SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID()); |
105 | | |
106 | 14 | StringRef HUName = getLangOpts().CurrentModule; |
107 | 14 | if (HUName.empty()) { |
108 | 3 | HUName = SourceMgr.getFileEntryForID(SourceMgr.getMainFileID())->getName(); |
109 | 3 | const_cast<LangOptions &>(getLangOpts()).CurrentModule = HUName.str(); |
110 | 3 | } |
111 | | |
112 | | // TODO: Make the C++20 header lookup independent. |
113 | | // When the input is pre-processed source, we need a file ref to the original |
114 | | // file for the header map. |
115 | 14 | auto F = SourceMgr.getFileManager().getFile(HUName); |
116 | | // For the sake of error recovery (if someone has moved the original header |
117 | | // after creating the pre-processed output) fall back to obtaining the file |
118 | | // ref for the input file, which must be present. |
119 | 14 | if (!F) |
120 | 0 | F = SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()); |
121 | 14 | assert(F && "failed to find the header unit source?"); |
122 | 0 | Module::Header H{HUName.str(), HUName.str(), *F}; |
123 | 14 | auto &Map = PP.getHeaderSearchInfo().getModuleMap(); |
124 | 14 | Module *Mod = Map.createHeaderUnit(StartOfTU, HUName, H); |
125 | 14 | assert(Mod && "module creation should not fail"); |
126 | 0 | ModuleScopes.push_back({}); // No GMF |
127 | 14 | ModuleScopes.back().BeginLoc = StartOfTU; |
128 | 14 | ModuleScopes.back().Module = Mod; |
129 | 14 | ModuleScopes.back().ModuleInterface = true; |
130 | 14 | ModuleScopes.back().IsPartition = false; |
131 | 14 | VisibleModules.setVisible(Mod, StartOfTU); |
132 | | |
133 | | // From now on, we have an owning module for all declarations we see. |
134 | | // All of these are implicitly exported. |
135 | 14 | auto *TU = Context.getTranslationUnitDecl(); |
136 | 14 | TU->setModuleOwnershipKind(Decl::ModuleOwnershipKind::Visible); |
137 | 14 | TU->setLocalOwningModule(Mod); |
138 | 14 | } |
139 | | |
140 | | Sema::DeclGroupPtrTy |
141 | | Sema::ActOnModuleDecl(SourceLocation StartLoc, SourceLocation ModuleLoc, |
142 | | ModuleDeclKind MDK, ModuleIdPath Path, |
143 | 233 | ModuleIdPath Partition, ModuleImportState &ImportState) { |
144 | 233 | assert((getLangOpts().ModulesTS || getLangOpts().CPlusPlusModules) && |
145 | 233 | "should only have module decl in Modules TS or C++20"); |
146 | | |
147 | 0 | bool IsFirstDecl = ImportState == ModuleImportState::FirstDecl; |
148 | 233 | bool SeenGMF = ImportState == ModuleImportState::GlobalFragment; |
149 | | // If any of the steps here fail, we count that as invalidating C++20 |
150 | | // module state; |
151 | 233 | ImportState = ModuleImportState::NotACXX20Module; |
152 | | |
153 | 233 | bool IsPartition = !Partition.empty(); |
154 | 233 | if (IsPartition) |
155 | 27 | switch (MDK) { |
156 | 10 | case ModuleDeclKind::Implementation: |
157 | 10 | MDK = ModuleDeclKind::PartitionImplementation; |
158 | 10 | break; |
159 | 17 | case ModuleDeclKind::Interface: |
160 | 17 | MDK = ModuleDeclKind::PartitionInterface; |
161 | 17 | break; |
162 | 0 | default: |
163 | 0 | llvm_unreachable("how did we get a partition type set?"); |
164 | 27 | } |
165 | | |
166 | | // A (non-partition) module implementation unit requires that we are not |
167 | | // compiling a module of any kind. A partition implementation emits an |
168 | | // interface (and the AST for the implementation), which will subsequently |
169 | | // be consumed to emit a binary. |
170 | | // A module interface unit requires that we are not compiling a module map. |
171 | 233 | switch (getLangOpts().getCompilingModule()) { |
172 | 111 | case LangOptions::CMK_None: |
173 | | // It's OK to compile a module interface as a normal translation unit. |
174 | 111 | break; |
175 | | |
176 | 122 | case LangOptions::CMK_ModuleInterface: |
177 | 122 | if (MDK != ModuleDeclKind::Implementation) |
178 | 121 | break; |
179 | | |
180 | | // We were asked to compile a module interface unit but this is a module |
181 | | // implementation unit. |
182 | 1 | Diag(ModuleLoc, diag::err_module_interface_implementation_mismatch) |
183 | 1 | << FixItHint::CreateInsertion(ModuleLoc, "export "); |
184 | 1 | MDK = ModuleDeclKind::Interface; |
185 | 1 | break; |
186 | | |
187 | 0 | case LangOptions::CMK_ModuleMap: |
188 | 0 | Diag(ModuleLoc, diag::err_module_decl_in_module_map_module); |
189 | 0 | return nullptr; |
190 | | |
191 | 0 | case LangOptions::CMK_HeaderModule: |
192 | 0 | case LangOptions::CMK_HeaderUnit: |
193 | 0 | Diag(ModuleLoc, diag::err_module_decl_in_header_module); |
194 | 0 | return nullptr; |
195 | 233 | } |
196 | | |
197 | 233 | assert(ModuleScopes.size() <= 1 && "expected to be at global module scope"); |
198 | | |
199 | | // FIXME: Most of this work should be done by the preprocessor rather than |
200 | | // here, in order to support macro import. |
201 | | |
202 | | // Only one module-declaration is permitted per source file. |
203 | 233 | if (!ModuleScopes.empty() && |
204 | 233 | ModuleScopes.back().Module->isModulePurview()120 ) { |
205 | 4 | Diag(ModuleLoc, diag::err_module_redeclaration); |
206 | 4 | Diag(VisibleModules.getImportLoc(ModuleScopes.back().Module), |
207 | 4 | diag::note_prev_module_declaration); |
208 | 4 | return nullptr; |
209 | 4 | } |
210 | | |
211 | | // Find the global module fragment we're adopting into this module, if any. |
212 | 229 | Module *GlobalModuleFragment = nullptr; |
213 | 229 | if (!ModuleScopes.empty() && |
214 | 229 | ModuleScopes.back().Module->Kind == Module::GlobalModuleFragment116 ) |
215 | 116 | GlobalModuleFragment = ModuleScopes.back().Module; |
216 | | |
217 | 229 | assert((!getLangOpts().CPlusPlusModules || getLangOpts().ModulesTS || |
218 | 229 | SeenGMF == (bool)GlobalModuleFragment) && |
219 | 229 | "mismatched global module state"); |
220 | | |
221 | | // In C++20, the module-declaration must be the first declaration if there |
222 | | // is no global module fragment. |
223 | 229 | if (getLangOpts().CPlusPlusModules && !IsFirstDecl154 && !SeenGMF42 ) { |
224 | 2 | Diag(ModuleLoc, diag::err_module_decl_not_at_start); |
225 | 2 | SourceLocation BeginLoc = |
226 | 2 | ModuleScopes.empty() |
227 | 2 | ? SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID()) |
228 | 2 | : ModuleScopes.back().BeginLoc0 ; |
229 | 2 | if (BeginLoc.isValid()) { |
230 | 2 | Diag(BeginLoc, diag::note_global_module_introducer_missing) |
231 | 2 | << FixItHint::CreateInsertion(BeginLoc, "module;\n"); |
232 | 2 | } |
233 | 2 | } |
234 | | |
235 | | // Flatten the dots in a module name. Unlike Clang's hierarchical module map |
236 | | // modules, the dots here are just another character that can appear in a |
237 | | // module name. |
238 | 229 | std::string ModuleName = stringFromPath(Path); |
239 | 229 | if (IsPartition) { |
240 | 27 | ModuleName += ":"; |
241 | 27 | ModuleName += stringFromPath(Partition); |
242 | 27 | } |
243 | | // If a module name was explicitly specified on the command line, it must be |
244 | | // correct. |
245 | 229 | if (!getLangOpts().CurrentModule.empty() && |
246 | 229 | getLangOpts().CurrentModule != ModuleName0 ) { |
247 | 0 | Diag(Path.front().second, diag::err_current_module_name_mismatch) |
248 | 0 | << SourceRange(Path.front().second, IsPartition |
249 | 0 | ? Partition.back().second |
250 | 0 | : Path.back().second) |
251 | 0 | << getLangOpts().CurrentModule; |
252 | 0 | return nullptr; |
253 | 0 | } |
254 | 229 | const_cast<LangOptions&>(getLangOpts()).CurrentModule = ModuleName; |
255 | | |
256 | 229 | auto &Map = PP.getHeaderSearchInfo().getModuleMap(); |
257 | 229 | Module *Mod; |
258 | | |
259 | 229 | switch (MDK) { |
260 | 170 | case ModuleDeclKind::Interface: |
261 | 187 | case ModuleDeclKind::PartitionInterface: { |
262 | | // We can't have parsed or imported a definition of this module or parsed a |
263 | | // module map defining it already. |
264 | 187 | if (auto *M = Map.findModule(ModuleName)) { |
265 | 3 | Diag(Path[0].second, diag::err_module_redefinition) << ModuleName; |
266 | 3 | if (M->DefinitionLoc.isValid()) |
267 | 0 | Diag(M->DefinitionLoc, diag::note_prev_module_definition); |
268 | 3 | else if (Optional<FileEntryRef> FE = M->getASTFile()) |
269 | 3 | Diag(M->DefinitionLoc, diag::note_prev_module_definition_from_ast_file) |
270 | 3 | << FE->getName(); |
271 | 3 | Mod = M; |
272 | 3 | break; |
273 | 3 | } |
274 | | |
275 | | // Create a Module for the module that we're defining. |
276 | 184 | Mod = Map.createModuleForInterfaceUnit(ModuleLoc, ModuleName, |
277 | 184 | GlobalModuleFragment); |
278 | 184 | if (MDK == ModuleDeclKind::PartitionInterface) |
279 | 17 | Mod->Kind = Module::ModulePartitionInterface; |
280 | 184 | assert(Mod && "module creation should not fail"); |
281 | 0 | break; |
282 | 187 | } |
283 | | |
284 | 32 | case ModuleDeclKind::Implementation: { |
285 | 32 | std::pair<IdentifierInfo *, SourceLocation> ModuleNameLoc( |
286 | 32 | PP.getIdentifierInfo(ModuleName), Path[0].second); |
287 | | // C++20 A module-declaration that contains neither an export- |
288 | | // keyword nor a module-partition implicitly imports the primary |
289 | | // module interface unit of the module as if by a module-import- |
290 | | // declaration. |
291 | 32 | Mod = getModuleLoader().loadModule(ModuleLoc, {ModuleNameLoc}, |
292 | 32 | Module::AllVisible, |
293 | 32 | /*IsInclusionDirective=*/false); |
294 | 32 | if (!Mod) { |
295 | 2 | Diag(ModuleLoc, diag::err_module_not_defined) << ModuleName; |
296 | | // Create an empty module interface unit for error recovery. |
297 | 2 | Mod = Map.createModuleForInterfaceUnit(ModuleLoc, ModuleName, |
298 | 2 | GlobalModuleFragment); |
299 | 2 | } |
300 | 32 | } break; |
301 | | |
302 | 10 | case ModuleDeclKind::PartitionImplementation: |
303 | | // Create an interface, but note that it is an implementation |
304 | | // unit. |
305 | 10 | Mod = Map.createModuleForInterfaceUnit(ModuleLoc, ModuleName, |
306 | 10 | GlobalModuleFragment); |
307 | 10 | Mod->Kind = Module::ModulePartitionImplementation; |
308 | 10 | break; |
309 | 229 | } |
310 | | |
311 | 229 | if (!GlobalModuleFragment) { |
312 | 113 | ModuleScopes.push_back({}); |
313 | 113 | if (getLangOpts().ModulesLocalVisibility) |
314 | 113 | ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules); |
315 | 116 | } else { |
316 | | // We're done with the global module fragment now. |
317 | 116 | ActOnEndOfTranslationUnitFragment(TUFragmentKind::Global); |
318 | 116 | } |
319 | | |
320 | | // Switch from the global module fragment (if any) to the named module. |
321 | 229 | ModuleScopes.back().BeginLoc = StartLoc; |
322 | 229 | ModuleScopes.back().Module = Mod; |
323 | 229 | ModuleScopes.back().ModuleInterface = MDK != ModuleDeclKind::Implementation; |
324 | 229 | ModuleScopes.back().IsPartition = IsPartition; |
325 | 229 | VisibleModules.setVisible(Mod, ModuleLoc); |
326 | | |
327 | | // From now on, we have an owning module for all declarations we see. |
328 | | // However, those declarations are module-private unless explicitly |
329 | | // exported. |
330 | 229 | auto *TU = Context.getTranslationUnitDecl(); |
331 | 229 | TU->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate); |
332 | 229 | TU->setLocalOwningModule(Mod); |
333 | | |
334 | | // We are in the module purview, but before any other (non import) |
335 | | // statements, so imports are allowed. |
336 | 229 | ImportState = ModuleImportState::ImportAllowed; |
337 | | |
338 | | // FIXME: Create a ModuleDecl. |
339 | 229 | return nullptr; |
340 | 229 | } |
341 | | |
342 | | Sema::DeclGroupPtrTy |
343 | | Sema::ActOnPrivateModuleFragmentDecl(SourceLocation ModuleLoc, |
344 | 18 | SourceLocation PrivateLoc) { |
345 | | // C++20 [basic.link]/2: |
346 | | // A private-module-fragment shall appear only in a primary module |
347 | | // interface unit. |
348 | 18 | switch (ModuleScopes.empty() ? Module::GlobalModuleFragment1 |
349 | 18 | : ModuleScopes.back().Module->Kind17 ) { |
350 | 0 | case Module::ModuleMapModule: |
351 | 2 | case Module::GlobalModuleFragment: |
352 | 3 | case Module::ModulePartitionImplementation: |
353 | 4 | case Module::ModulePartitionInterface: |
354 | 4 | case Module::ModuleHeaderUnit: |
355 | 4 | Diag(PrivateLoc, diag::err_private_module_fragment_not_module); |
356 | 4 | return nullptr; |
357 | | |
358 | 3 | case Module::PrivateModuleFragment: |
359 | 3 | Diag(PrivateLoc, diag::err_private_module_fragment_redefined); |
360 | 3 | Diag(ModuleScopes.back().BeginLoc, diag::note_previous_definition); |
361 | 3 | return nullptr; |
362 | | |
363 | 11 | case Module::ModuleInterfaceUnit: |
364 | 11 | break; |
365 | 18 | } |
366 | | |
367 | 11 | if (!ModuleScopes.back().ModuleInterface) { |
368 | 1 | Diag(PrivateLoc, diag::err_private_module_fragment_not_module_interface); |
369 | 1 | Diag(ModuleScopes.back().BeginLoc, |
370 | 1 | diag::note_not_module_interface_add_export) |
371 | 1 | << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export "); |
372 | 1 | return nullptr; |
373 | 1 | } |
374 | | |
375 | | // FIXME: Check this isn't a module interface partition. |
376 | | // FIXME: Check that this translation unit does not import any partitions; |
377 | | // such imports would violate [basic.link]/2's "shall be the only module unit" |
378 | | // restriction. |
379 | | |
380 | | // We've finished the public fragment of the translation unit. |
381 | 10 | ActOnEndOfTranslationUnitFragment(TUFragmentKind::Normal); |
382 | | |
383 | 10 | auto &Map = PP.getHeaderSearchInfo().getModuleMap(); |
384 | 10 | Module *PrivateModuleFragment = |
385 | 10 | Map.createPrivateModuleFragmentForInterfaceUnit( |
386 | 10 | ModuleScopes.back().Module, PrivateLoc); |
387 | 10 | assert(PrivateModuleFragment && "module creation should not fail"); |
388 | | |
389 | | // Enter the scope of the private module fragment. |
390 | 0 | ModuleScopes.push_back({}); |
391 | 10 | ModuleScopes.back().BeginLoc = ModuleLoc; |
392 | 10 | ModuleScopes.back().Module = PrivateModuleFragment; |
393 | 10 | ModuleScopes.back().ModuleInterface = true; |
394 | 10 | VisibleModules.setVisible(PrivateModuleFragment, ModuleLoc); |
395 | | |
396 | | // All declarations created from now on are scoped to the private module |
397 | | // fragment (and are neither visible nor reachable in importers of the module |
398 | | // interface). |
399 | 10 | auto *TU = Context.getTranslationUnitDecl(); |
400 | 10 | TU->setModuleOwnershipKind(Decl::ModuleOwnershipKind::ModulePrivate); |
401 | 10 | TU->setLocalOwningModule(PrivateModuleFragment); |
402 | | |
403 | | // FIXME: Consider creating an explicit representation of this declaration. |
404 | 10 | return nullptr; |
405 | 11 | } |
406 | | |
407 | | DeclResult Sema::ActOnModuleImport(SourceLocation StartLoc, |
408 | | SourceLocation ExportLoc, |
409 | | SourceLocation ImportLoc, ModuleIdPath Path, |
410 | 1.80k | bool IsPartition) { |
411 | | |
412 | 1.80k | bool Cxx20Mode = getLangOpts().CPlusPlusModules || getLangOpts().ModulesTS1.73k ; |
413 | 1.80k | assert((!IsPartition || Cxx20Mode) && "partition seen in non-C++20 code?"); |
414 | | |
415 | | // For a C++20 module name, flatten into a single identifier with the source |
416 | | // location of the first component. |
417 | 0 | std::pair<IdentifierInfo *, SourceLocation> ModuleNameLoc; |
418 | | |
419 | 1.80k | std::string ModuleName; |
420 | 1.80k | if (IsPartition) { |
421 | | // We already checked that we are in a module purview in the parser. |
422 | 22 | assert(!ModuleScopes.empty() && "in a module purview, but no module?"); |
423 | 0 | Module *NamedMod = ModuleScopes.back().Module; |
424 | | // If we are importing into a partition, find the owning named module, |
425 | | // otherwise, the name of the importing named module. |
426 | 22 | ModuleName = NamedMod->getPrimaryModuleInterfaceName().str(); |
427 | 22 | ModuleName += ":"; |
428 | 22 | ModuleName += stringFromPath(Path); |
429 | 22 | ModuleNameLoc = {PP.getIdentifierInfo(ModuleName), Path[0].second}; |
430 | 22 | Path = ModuleIdPath(ModuleNameLoc); |
431 | 1.78k | } else if (Cxx20Mode) { |
432 | 109 | ModuleName = stringFromPath(Path); |
433 | 109 | ModuleNameLoc = {PP.getIdentifierInfo(ModuleName), Path[0].second}; |
434 | 109 | Path = ModuleIdPath(ModuleNameLoc); |
435 | 109 | } |
436 | | |
437 | | // Diagnose self-import before attempting a load. |
438 | | // [module.import]/9 |
439 | | // A module implementation unit of a module M that is not a module partition |
440 | | // shall not contain a module-import-declaration nominating M. |
441 | | // (for an implementation, the module interface is imported implicitly, |
442 | | // but that's handled in the module decl code). |
443 | | |
444 | 1.80k | if (getLangOpts().CPlusPlusModules && isCurrentModulePurview()63 && |
445 | 1.80k | getCurrentModule()->Name == ModuleName49 ) { |
446 | 4 | Diag(ImportLoc, diag::err_module_self_import_cxx20) |
447 | 4 | << ModuleName << !ModuleScopes.back().ModuleInterface; |
448 | 4 | return true; |
449 | 4 | } |
450 | | |
451 | 1.79k | Module *Mod = getModuleLoader().loadModule( |
452 | 1.79k | ImportLoc, Path, Module::AllVisible, /*IsInclusionDirective=*/false); |
453 | 1.79k | if (!Mod) |
454 | 77 | return true; |
455 | | |
456 | 1.72k | return ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, Mod, Path); |
457 | 1.79k | } |
458 | | |
459 | | /// Determine whether \p D is lexically within an export-declaration. |
460 | 245 | static const ExportDecl *getEnclosingExportDecl(const Decl *D) { |
461 | 511 | for (auto *DC = D->getLexicalDeclContext(); DC; DC = DC->getLexicalParent()266 ) |
462 | 273 | if (auto *ED = dyn_cast<ExportDecl>(DC)) |
463 | 7 | return ED; |
464 | 238 | return nullptr; |
465 | 245 | } |
466 | | |
467 | | DeclResult Sema::ActOnModuleImport(SourceLocation StartLoc, |
468 | | SourceLocation ExportLoc, |
469 | | SourceLocation ImportLoc, Module *Mod, |
470 | 1.74k | ModuleIdPath Path) { |
471 | 1.74k | VisibleModules.setVisible(Mod, ImportLoc); |
472 | | |
473 | 1.74k | checkModuleImportContext(*this, Mod, ImportLoc, CurContext); |
474 | | |
475 | | // FIXME: we should support importing a submodule within a different submodule |
476 | | // of the same top-level module. Until we do, make it an error rather than |
477 | | // silently ignoring the import. |
478 | | // FIXME: Should we warn on a redundant import of the current module? |
479 | 1.74k | if (Mod->getTopLevelModuleName() == getLangOpts().CurrentModule && |
480 | 1.74k | (10 getLangOpts().isCompilingModule()10 || !getLangOpts().ModulesTS9 )) { |
481 | 4 | Diag(ImportLoc, getLangOpts().isCompilingModule() |
482 | 4 | ? diag::err_module_self_import1 |
483 | 4 | : diag::err_module_import_in_implementation3 ) |
484 | 4 | << Mod->getFullModuleName() << getLangOpts().CurrentModule; |
485 | 4 | } |
486 | | |
487 | 1.74k | SmallVector<SourceLocation, 2> IdentifierLocs; |
488 | | |
489 | 1.74k | if (Path.empty()) { |
490 | | // If this was a header import, pad out with dummy locations. |
491 | | // FIXME: Pass in and use the location of the header-name token in this |
492 | | // case. |
493 | 42 | for (Module *ModCheck = Mod; ModCheck; ModCheck = ModCheck->Parent22 ) |
494 | 22 | IdentifierLocs.push_back(SourceLocation()); |
495 | 1.72k | } else if (getLangOpts().CPlusPlusModules && !Mod->Parent56 ) { |
496 | | // A single identifier for the whole name. |
497 | 56 | IdentifierLocs.push_back(Path[0].second); |
498 | 1.66k | } else { |
499 | 1.66k | Module *ModCheck = Mod; |
500 | 3.46k | for (unsigned I = 0, N = Path.size(); I != N; ++I1.79k ) { |
501 | | // If we've run out of module parents, just drop the remaining |
502 | | // identifiers. We need the length to be consistent. |
503 | 1.80k | if (!ModCheck) |
504 | 6 | break; |
505 | 1.79k | ModCheck = ModCheck->Parent; |
506 | | |
507 | 1.79k | IdentifierLocs.push_back(Path[I].second); |
508 | 1.79k | } |
509 | 1.66k | } |
510 | | |
511 | 1.74k | ImportDecl *Import = ImportDecl::Create(Context, CurContext, StartLoc, |
512 | 1.74k | Mod, IdentifierLocs); |
513 | 1.74k | CurContext->addDecl(Import); |
514 | | |
515 | | // Sequence initialization of the imported module before that of the current |
516 | | // module, if any. |
517 | 1.74k | if (!ModuleScopes.empty()) |
518 | 285 | Context.addModuleInitializer(ModuleScopes.back().Module, Import); |
519 | | |
520 | | // A module (partition) implementation unit shall not be exported. |
521 | 1.74k | if (getLangOpts().CPlusPlusModules && ExportLoc.isValid()76 && |
522 | 1.74k | Mod->Kind == Module::ModuleKind::ModulePartitionImplementation17 ) { |
523 | 1 | Diag(ExportLoc, diag::err_export_partition_impl) |
524 | 1 | << SourceRange(ExportLoc, Path.back().second); |
525 | 1.74k | } else if (!ModuleScopes.empty() && |
526 | 1.74k | (284 ModuleScopes.back().ModuleInterface284 || |
527 | 284 | (218 getLangOpts().CPlusPlusModules218 && |
528 | 218 | ModuleScopes.back().Module->isGlobalModule()7 ))) { |
529 | 70 | assert((!ModuleScopes.back().Module->isGlobalModule() || |
530 | 70 | Mod->Kind == Module::ModuleKind::ModuleHeaderUnit) && |
531 | 70 | "should only be importing a header unit into the GMF"); |
532 | | // Re-export the module if the imported module is exported. |
533 | | // Note that we don't need to add re-exported module to Imports field |
534 | | // since `Exports` implies the module is imported already. |
535 | 70 | if (ExportLoc.isValid() || getEnclosingExportDecl(Import)56 ) |
536 | 18 | getCurrentModule()->Exports.emplace_back(Mod, false); |
537 | 52 | else |
538 | 52 | getCurrentModule()->Imports.insert(Mod); |
539 | 1.67k | } else if (ExportLoc.isValid()) { |
540 | | // [module.interface]p1: |
541 | | // An export-declaration shall inhabit a namespace scope and appear in the |
542 | | // purview of a module interface unit. |
543 | 2 | Diag(ExportLoc, diag::err_export_not_in_module_interface) |
544 | 2 | << (!ModuleScopes.empty() && |
545 | 2 | !ModuleScopes.back().ImplicitGlobalModuleFragment1 ); |
546 | 1.66k | } else if (getLangOpts().isCompilingModule()) { |
547 | 161 | Module *ThisModule = PP.getHeaderSearchInfo().lookupModule( |
548 | 161 | getLangOpts().CurrentModule, ExportLoc, false, false); |
549 | 161 | (void)ThisModule; |
550 | 161 | assert(ThisModule && "was expecting a module if building one"); |
551 | 161 | } |
552 | | |
553 | | // In some cases we need to know if an entity was present in a directly- |
554 | | // imported module (as opposed to a transitive import). This avoids |
555 | | // searching both Imports and Exports. |
556 | 0 | DirectModuleImports.insert(Mod); |
557 | | |
558 | 1.74k | return Import; |
559 | 1.74k | } |
560 | | |
561 | 25.4k | void Sema::ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod) { |
562 | 25.4k | checkModuleImportContext(*this, Mod, DirectiveLoc, CurContext, true); |
563 | 25.4k | BuildModuleInclude(DirectiveLoc, Mod); |
564 | 25.4k | } |
565 | | |
566 | 121k | void Sema::BuildModuleInclude(SourceLocation DirectiveLoc, Module *Mod) { |
567 | | // Determine whether we're in the #include buffer for a module. The #includes |
568 | | // in that buffer do not qualify as module imports; they're just an |
569 | | // implementation detail of us building the module. |
570 | | // |
571 | | // FIXME: Should we even get ActOnModuleInclude calls for those? |
572 | 121k | bool IsInModuleIncludes = |
573 | 121k | TUKind == TU_Module && |
574 | 121k | getSourceManager().isWrittenInMainFile(DirectiveLoc)119k ; |
575 | | |
576 | 121k | bool ShouldAddImport = !IsInModuleIncludes; |
577 | | |
578 | | // If this module import was due to an inclusion directive, create an |
579 | | // implicit import declaration to capture it in the AST. |
580 | 121k | if (ShouldAddImport) { |
581 | 118k | TranslationUnitDecl *TU = getASTContext().getTranslationUnitDecl(); |
582 | 118k | ImportDecl *ImportD = ImportDecl::CreateImplicit(getASTContext(), TU, |
583 | 118k | DirectiveLoc, Mod, |
584 | 118k | DirectiveLoc); |
585 | 118k | if (!ModuleScopes.empty()) |
586 | 98.6k | Context.addModuleInitializer(ModuleScopes.back().Module, ImportD); |
587 | 118k | TU->addDecl(ImportD); |
588 | 118k | Consumer.HandleImplicitImportDecl(ImportD); |
589 | 118k | } |
590 | | |
591 | 121k | getModuleLoader().makeModuleVisible(Mod, Module::AllVisible, DirectiveLoc); |
592 | 121k | VisibleModules.setVisible(Mod, DirectiveLoc); |
593 | | |
594 | 121k | if (getLangOpts().isCompilingModule()) { |
595 | 119k | Module *ThisModule = PP.getHeaderSearchInfo().lookupModule( |
596 | 119k | getLangOpts().CurrentModule, DirectiveLoc, false, false); |
597 | 119k | (void)ThisModule; |
598 | 119k | assert(ThisModule && "was expecting a module if building one"); |
599 | 119k | } |
600 | 121k | } |
601 | | |
602 | 96.1k | void Sema::ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod) { |
603 | 96.1k | checkModuleImportContext(*this, Mod, DirectiveLoc, CurContext, true); |
604 | | |
605 | 96.1k | ModuleScopes.push_back({}); |
606 | 96.1k | ModuleScopes.back().Module = Mod; |
607 | 96.1k | if (getLangOpts().ModulesLocalVisibility) |
608 | 297 | ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules); |
609 | | |
610 | 96.1k | VisibleModules.setVisible(Mod, DirectiveLoc); |
611 | | |
612 | | // The enclosing context is now part of this module. |
613 | | // FIXME: Consider creating a child DeclContext to hold the entities |
614 | | // lexically within the module. |
615 | 96.1k | if (getLangOpts().trackLocalOwningModule()) { |
616 | 221k | for (auto *DC = CurContext; DC; DC = DC->getLexicalParent()125k ) { |
617 | 125k | cast<Decl>(DC)->setModuleOwnershipKind( |
618 | 125k | getLangOpts().ModulesLocalVisibility |
619 | 125k | ? Decl::ModuleOwnershipKind::VisibleWhenImported303 |
620 | 125k | : Decl::ModuleOwnershipKind::Visible124k ); |
621 | 125k | cast<Decl>(DC)->setLocalOwningModule(Mod); |
622 | 125k | } |
623 | 96.0k | } |
624 | 96.1k | } |
625 | | |
626 | 96.1k | void Sema::ActOnModuleEnd(SourceLocation EomLoc, Module *Mod) { |
627 | 96.1k | if (getLangOpts().ModulesLocalVisibility) { |
628 | 297 | VisibleModules = std::move(ModuleScopes.back().OuterVisibleModules); |
629 | | // Leaving a module hides namespace names, so our visible namespace cache |
630 | | // is now out of date. |
631 | 297 | VisibleNamespaceCache.clear(); |
632 | 297 | } |
633 | | |
634 | 96.1k | assert(!ModuleScopes.empty() && ModuleScopes.back().Module == Mod && |
635 | 96.1k | "left the wrong module scope"); |
636 | 0 | ModuleScopes.pop_back(); |
637 | | |
638 | | // We got to the end of processing a local module. Create an |
639 | | // ImportDecl as we would for an imported module. |
640 | 96.1k | FileID File = getSourceManager().getFileID(EomLoc); |
641 | 96.1k | SourceLocation DirectiveLoc; |
642 | 96.1k | if (EomLoc == getSourceManager().getLocForEndOfFile(File)) { |
643 | | // We reached the end of a #included module header. Use the #include loc. |
644 | 497 | assert(File != getSourceManager().getMainFileID() && |
645 | 497 | "end of submodule in main source file"); |
646 | 0 | DirectiveLoc = getSourceManager().getIncludeLoc(File); |
647 | 95.6k | } else { |
648 | | // We reached an EOM pragma. Use the pragma location. |
649 | 95.6k | DirectiveLoc = EomLoc; |
650 | 95.6k | } |
651 | 0 | BuildModuleInclude(DirectiveLoc, Mod); |
652 | | |
653 | | // Any further declarations are in whatever module we returned to. |
654 | 96.1k | if (getLangOpts().trackLocalOwningModule()) { |
655 | | // The parser guarantees that this is the same context that we entered |
656 | | // the module within. |
657 | 221k | for (auto *DC = CurContext; DC; DC = DC->getLexicalParent()125k ) { |
658 | 125k | cast<Decl>(DC)->setLocalOwningModule(getCurrentModule()); |
659 | 125k | if (!getCurrentModule()) |
660 | 24.3k | cast<Decl>(DC)->setModuleOwnershipKind( |
661 | 24.3k | Decl::ModuleOwnershipKind::Unowned); |
662 | 125k | } |
663 | 96.0k | } |
664 | 96.1k | } |
665 | | |
666 | | void Sema::createImplicitModuleImportForErrorRecovery(SourceLocation Loc, |
667 | 675 | Module *Mod) { |
668 | | // Bail if we're not allowed to implicitly import a module here. |
669 | 675 | if (isSFINAEContext() || !getLangOpts().ModulesErrorRecovery || |
670 | 675 | VisibleModules.isVisible(Mod)60 ) |
671 | 617 | return; |
672 | | |
673 | | // Create the implicit import declaration. |
674 | 58 | TranslationUnitDecl *TU = getASTContext().getTranslationUnitDecl(); |
675 | 58 | ImportDecl *ImportD = ImportDecl::CreateImplicit(getASTContext(), TU, |
676 | 58 | Loc, Mod, Loc); |
677 | 58 | TU->addDecl(ImportD); |
678 | 58 | Consumer.HandleImplicitImportDecl(ImportD); |
679 | | |
680 | | // Make the module visible. |
681 | 58 | getModuleLoader().makeModuleVisible(Mod, Module::AllVisible, Loc); |
682 | 58 | VisibleModules.setVisible(Mod, Loc); |
683 | 58 | } |
684 | | |
685 | | /// We have parsed the start of an export declaration, including the '{' |
686 | | /// (if present). |
687 | | Decl *Sema::ActOnStartExportDecl(Scope *S, SourceLocation ExportLoc, |
688 | 204 | SourceLocation LBraceLoc) { |
689 | 204 | ExportDecl *D = ExportDecl::Create(Context, CurContext, ExportLoc); |
690 | | |
691 | | // Set this temporarily so we know the export-declaration was braced. |
692 | 204 | D->setRBraceLoc(LBraceLoc); |
693 | | |
694 | 204 | CurContext->addDecl(D); |
695 | 204 | PushDeclContext(S, D); |
696 | | |
697 | | // C++2a [module.interface]p1: |
698 | | // An export-declaration shall appear only [...] in the purview of a module |
699 | | // interface unit. An export-declaration shall not appear directly or |
700 | | // indirectly within [...] a private-module-fragment. |
701 | 204 | if (ModuleScopes.empty() || !ModuleScopes.back().Module->isModulePurview()203 ) { |
702 | 7 | Diag(ExportLoc, diag::err_export_not_in_module_interface) << 0; |
703 | 7 | D->setInvalidDecl(); |
704 | 7 | return D; |
705 | 197 | } else if (!ModuleScopes.back().ModuleInterface) { |
706 | 3 | Diag(ExportLoc, diag::err_export_not_in_module_interface) << 1; |
707 | 3 | Diag(ModuleScopes.back().BeginLoc, |
708 | 3 | diag::note_not_module_interface_add_export) |
709 | 3 | << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export "); |
710 | 3 | D->setInvalidDecl(); |
711 | 3 | return D; |
712 | 194 | } else if (ModuleScopes.back().Module->Kind == |
713 | 194 | Module::PrivateModuleFragment) { |
714 | 1 | Diag(ExportLoc, diag::err_export_in_private_module_fragment); |
715 | 1 | Diag(ModuleScopes.back().BeginLoc, diag::note_private_module_fragment); |
716 | 1 | D->setInvalidDecl(); |
717 | 1 | return D; |
718 | 1 | } |
719 | | |
720 | 593 | for (const DeclContext *DC = CurContext; 193 DC; DC = DC->getLexicalParent()400 ) { |
721 | 411 | if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) { |
722 | | // An export-declaration shall not appear directly or indirectly within |
723 | | // an unnamed namespace [...] |
724 | 32 | if (ND->isAnonymousNamespace()) { |
725 | 4 | Diag(ExportLoc, diag::err_export_within_anonymous_namespace); |
726 | 4 | Diag(ND->getLocation(), diag::note_anonymous_namespace); |
727 | | // Don't diagnose internal-linkage declarations in this region. |
728 | 4 | D->setInvalidDecl(); |
729 | 4 | return D; |
730 | 4 | } |
731 | | |
732 | | // A declaration is exported if it is [...] a namespace-definition |
733 | | // that contains an exported declaration. |
734 | | // |
735 | | // Defer exporting the namespace until after we leave it, in order to |
736 | | // avoid marking all subsequent declarations in the namespace as exported. |
737 | 28 | if (!DeferredExportedNamespaces.insert(ND).second) |
738 | 7 | break; |
739 | 28 | } |
740 | 411 | } |
741 | | |
742 | | // [...] its declaration or declaration-seq shall not contain an |
743 | | // export-declaration. |
744 | 189 | if (auto *ED = getEnclosingExportDecl(D)) { |
745 | 3 | Diag(ExportLoc, diag::err_export_within_export); |
746 | 3 | if (ED->hasBraces()) |
747 | 2 | Diag(ED->getLocation(), diag::note_export); |
748 | 3 | D->setInvalidDecl(); |
749 | 3 | return D; |
750 | 3 | } |
751 | | |
752 | 186 | D->setModuleOwnershipKind(Decl::ModuleOwnershipKind::VisibleWhenImported); |
753 | 186 | return D; |
754 | 189 | } |
755 | | |
756 | | static bool checkExportedDeclContext(Sema &S, DeclContext *DC, |
757 | | SourceLocation BlockStart); |
758 | | |
759 | | namespace { |
760 | | enum class UnnamedDeclKind { |
761 | | Empty, |
762 | | StaticAssert, |
763 | | Asm, |
764 | | UsingDirective, |
765 | | Namespace, |
766 | | Context |
767 | | }; |
768 | | } |
769 | | |
770 | 359 | static llvm::Optional<UnnamedDeclKind> getUnnamedDeclKind(Decl *D) { |
771 | 359 | if (isa<EmptyDecl>(D)) |
772 | 5 | return UnnamedDeclKind::Empty; |
773 | 354 | if (isa<StaticAssertDecl>(D)) |
774 | 4 | return UnnamedDeclKind::StaticAssert; |
775 | 350 | if (isa<FileScopeAsmDecl>(D)) |
776 | 1 | return UnnamedDeclKind::Asm; |
777 | 349 | if (isa<UsingDirectiveDecl>(D)) |
778 | 3 | return UnnamedDeclKind::UsingDirective; |
779 | | // Everything else either introduces one or more names or is ill-formed. |
780 | 346 | return llvm::None; |
781 | 349 | } |
782 | | |
783 | 17 | unsigned getUnnamedDeclDiag(UnnamedDeclKind UDK, bool InBlock) { |
784 | 17 | switch (UDK) { |
785 | 5 | case UnnamedDeclKind::Empty: |
786 | 9 | case UnnamedDeclKind::StaticAssert: |
787 | | // Allow empty-declarations and static_asserts in an export block as an |
788 | | // extension. |
789 | 9 | return InBlock ? diag::ext_export_no_name_block4 : diag::err_export_no_name5 ; |
790 | | |
791 | 3 | case UnnamedDeclKind::UsingDirective: |
792 | | // Allow exporting using-directives as an extension. |
793 | 3 | return diag::ext_export_using_directive; |
794 | | |
795 | 1 | case UnnamedDeclKind::Namespace: |
796 | | // Anonymous namespace with no content. |
797 | 1 | return diag::introduces_no_names; |
798 | | |
799 | 3 | case UnnamedDeclKind::Context: |
800 | | // Allow exporting DeclContexts that transitively contain no declarations |
801 | | // as an extension. |
802 | 3 | return diag::ext_export_no_names; |
803 | | |
804 | 1 | case UnnamedDeclKind::Asm: |
805 | 1 | return diag::err_export_no_name; |
806 | 17 | } |
807 | 0 | llvm_unreachable("unknown kind"); |
808 | 0 | } |
809 | | |
810 | | static void diagExportedUnnamedDecl(Sema &S, UnnamedDeclKind UDK, Decl *D, |
811 | 17 | SourceLocation BlockStart) { |
812 | 17 | S.Diag(D->getLocation(), getUnnamedDeclDiag(UDK, BlockStart.isValid())) |
813 | 17 | << (unsigned)UDK; |
814 | 17 | if (BlockStart.isValid()) |
815 | 6 | S.Diag(BlockStart, diag::note_export); |
816 | 17 | } |
817 | | |
818 | | /// Check that it's valid to export \p D. |
819 | 359 | static bool checkExportedDecl(Sema &S, Decl *D, SourceLocation BlockStart) { |
820 | | // C++2a [module.interface]p3: |
821 | | // An exported declaration shall declare at least one name |
822 | 359 | if (auto UDK = getUnnamedDeclKind(D)) |
823 | 13 | diagExportedUnnamedDecl(S, *UDK, D, BlockStart); |
824 | | |
825 | | // [...] shall not declare a name with internal linkage. |
826 | 359 | bool HasName = false; |
827 | 359 | if (auto *ND = dyn_cast<NamedDecl>(D)) { |
828 | | // Don't diagnose anonymous union objects; we'll diagnose their members |
829 | | // instead. |
830 | 334 | HasName = (bool)ND->getDeclName(); |
831 | 334 | if (HasName && ND->getFormalLinkage() == InternalLinkage313 ) { |
832 | 11 | S.Diag(ND->getLocation(), diag::err_export_internal) << ND; |
833 | 11 | if (BlockStart.isValid()) |
834 | 2 | S.Diag(BlockStart, diag::note_export); |
835 | 11 | } |
836 | 334 | } |
837 | | |
838 | | // C++2a [module.interface]p5: |
839 | | // all entities to which all of the using-declarators ultimately refer |
840 | | // shall have been introduced with a name having external linkage |
841 | 359 | if (auto *USD = dyn_cast<UsingShadowDecl>(D)) { |
842 | 44 | NamedDecl *Target = USD->getUnderlyingDecl(); |
843 | 44 | Linkage Lk = Target->getFormalLinkage(); |
844 | 44 | if (Lk == InternalLinkage || Lk == ModuleLinkage24 ) { |
845 | 32 | S.Diag(USD->getLocation(), diag::err_export_using_internal) |
846 | 32 | << (Lk == InternalLinkage ? 020 : 112 ) << Target; |
847 | 32 | S.Diag(Target->getLocation(), diag::note_using_decl_target); |
848 | 32 | if (BlockStart.isValid()) |
849 | 28 | S.Diag(BlockStart, diag::note_export); |
850 | 32 | } |
851 | 44 | } |
852 | | |
853 | | // Recurse into namespace-scope DeclContexts. (Only namespace-scope |
854 | | // declarations are exported.). |
855 | 359 | if (auto *DC = dyn_cast<DeclContext>(D)) { |
856 | 131 | if (isa<NamespaceDecl>(D) && DC->decls().empty()22 ) { |
857 | 4 | if (!HasName) |
858 | | // We don't allow an empty anonymous namespace (we don't allow decls |
859 | | // in them either, but that's handled in the recursion). |
860 | 1 | diagExportedUnnamedDecl(S, UnnamedDeclKind::Namespace, D, BlockStart); |
861 | | // We allow an empty named namespace decl. |
862 | 127 | } else if (DC->getRedeclContext()->isFileContext() && !isa<EnumDecl>(D)32 ) |
863 | 29 | return checkExportedDeclContext(S, DC, BlockStart); |
864 | 131 | } |
865 | 330 | return false; |
866 | 359 | } |
867 | | |
868 | | /// Check that it's valid to export all the declarations in \p DC. |
869 | | static bool checkExportedDeclContext(Sema &S, DeclContext *DC, |
870 | 29 | SourceLocation BlockStart) { |
871 | 29 | bool AllUnnamed = true; |
872 | 29 | for (auto *D : DC->decls()) |
873 | 62 | AllUnnamed &= checkExportedDecl(S, D, BlockStart); |
874 | 29 | return AllUnnamed; |
875 | 29 | } |
876 | | |
877 | | /// Complete the definition of an export declaration. |
878 | 204 | Decl *Sema::ActOnFinishExportDecl(Scope *S, Decl *D, SourceLocation RBraceLoc) { |
879 | 204 | auto *ED = cast<ExportDecl>(D); |
880 | 204 | if (RBraceLoc.isValid()) |
881 | 23 | ED->setRBraceLoc(RBraceLoc); |
882 | | |
883 | 204 | PopDeclContext(); |
884 | | |
885 | 204 | if (!D->isInvalidDecl()) { |
886 | 186 | SourceLocation BlockStart = |
887 | 186 | ED->hasBraces() ? ED->getBeginLoc()22 : SourceLocation()164 ; |
888 | 297 | for (auto *Child : ED->decls()) { |
889 | 297 | if (checkExportedDecl(*this, Child, BlockStart)) { |
890 | | // If a top-level child is a linkage-spec declaration, it might contain |
891 | | // no declarations (transitively), in which case it's ill-formed. |
892 | 3 | diagExportedUnnamedDecl(*this, UnnamedDeclKind::Context, Child, |
893 | 3 | BlockStart); |
894 | 3 | } |
895 | 297 | } |
896 | 186 | } |
897 | | |
898 | 204 | return D; |
899 | 204 | } |
900 | | |
901 | | Module *Sema::PushGlobalModuleFragment(SourceLocation BeginLoc, |
902 | 188 | bool IsImplicit) { |
903 | | // We shouldn't create new global module fragment if there is already |
904 | | // one. |
905 | 188 | if (!GlobalModuleFragment) { |
906 | 170 | ModuleMap &Map = PP.getHeaderSearchInfo().getModuleMap(); |
907 | 170 | GlobalModuleFragment = Map.createGlobalModuleFragmentForModuleUnit( |
908 | 170 | BeginLoc, getCurrentModule()); |
909 | 170 | } |
910 | | |
911 | 188 | assert(GlobalModuleFragment && "module creation should not fail"); |
912 | | |
913 | | // Enter the scope of the global module. |
914 | 0 | ModuleScopes.push_back({BeginLoc, GlobalModuleFragment, |
915 | 188 | /*ModuleInterface=*/false, |
916 | 188 | /*IsPartition=*/false, |
917 | 188 | /*ImplicitGlobalModuleFragment=*/IsImplicit, |
918 | 188 | /*OuterVisibleModules=*/{}}); |
919 | 188 | VisibleModules.setVisible(GlobalModuleFragment, BeginLoc); |
920 | | |
921 | 188 | return GlobalModuleFragment; |
922 | 188 | } |
923 | | |
924 | 21 | void Sema::PopGlobalModuleFragment() { |
925 | 21 | assert(!ModuleScopes.empty() && getCurrentModule()->isGlobalModule() && |
926 | 21 | "left the wrong module scope, which is not global module fragment"); |
927 | 0 | ModuleScopes.pop_back(); |
928 | 21 | } |