1//===--- IdentifierTable.cpp - Hash table for identifier lookup -----------===// 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 implements the IdentifierInfo, IdentifierVisitor, and 11// IdentifierTable interfaces. 12// 13//===----------------------------------------------------------------------===// 14 15#include "clang/Basic/CharInfo.h" 16#include "clang/Basic/IdentifierTable.h" 17#include "clang/Basic/LangOptions.h" 18#include "clang/Basic/OperatorKinds.h" 19#include "clang/Basic/Specifiers.h" 20#include "llvm/ADT/DenseMap.h" 21#include "llvm/ADT/FoldingSet.h" 22#include "llvm/ADT/SmallString.h" 23#include "llvm/Support/ErrorHandling.h" 24#include "llvm/Support/raw_ostream.h" 25#include <cstdio> 26 27using namespace clang; 28 29//===----------------------------------------------------------------------===// 30// IdentifierInfo Implementation 31//===----------------------------------------------------------------------===// 32 33IdentifierInfo::IdentifierInfo() { 34 TokenID = tok::identifier; 35 ObjCOrBuiltinID = 0; 36 HasMacro = false; 37 HadMacro = false; 38 IsExtension = false; 39 IsFutureCompatKeyword = false; 40 IsPoisoned = false; 41 IsCPPOperatorKeyword = false; 42 NeedsHandleIdentifier = false; 43 IsFromAST = false; 44 ChangedAfterLoad = false; 45 FEChangedAfterLoad = false; 46 RevertedTokenID = false; 47 OutOfDate = false; 48 IsModulesImport = false; 49 FETokenInfo = nullptr; 50 Entry = nullptr; 51} 52 53//===----------------------------------------------------------------------===// 54// IdentifierTable Implementation 55//===----------------------------------------------------------------------===// 56 57IdentifierIterator::~IdentifierIterator() { } 58 59IdentifierInfoLookup::~IdentifierInfoLookup() {} 60 61namespace { 62 /// \brief A simple identifier lookup iterator that represents an 63 /// empty sequence of identifiers. 64 class EmptyLookupIterator : public IdentifierIterator 65 { 66 public: 67 StringRef Next() override { return StringRef(); } 68 }; 69} 70 71IdentifierIterator *IdentifierInfoLookup::getIdentifiers() { 72 return new EmptyLookupIterator(); 73} 74 75IdentifierTable::IdentifierTable(const LangOptions &LangOpts, 76 IdentifierInfoLookup* externalLookup) 77 : HashTable(8192), // Start with space for 8K identifiers. 78 ExternalLookup(externalLookup) { 79 80 // Populate the identifier table with info about keywords for the current 81 // language. 82 AddKeywords(LangOpts); 83 84 85 // Add the '_experimental_modules_import' contextual keyword. 86 get("import").setModulesImport(true); 87} 88 89//===----------------------------------------------------------------------===// 90// Language Keyword Implementation 91//===----------------------------------------------------------------------===// 92 93// Constants for TokenKinds.def 94namespace { 95 enum { 96 KEYC99 = 0x1, 97 KEYCXX = 0x2, 98 KEYCXX11 = 0x4, 99 KEYGNU = 0x8, 100 KEYMS = 0x10, 101 BOOLSUPPORT = 0x20, 102 KEYALTIVEC = 0x40, 103 KEYNOCXX = 0x80, 104 KEYBORLAND = 0x100, 105 KEYOPENCL = 0x200, 106 KEYC11 = 0x400, 107 KEYARC = 0x800, 108 KEYNOMS18 = 0x01000, 109 KEYNOOPENCL = 0x02000, 110 WCHARSUPPORT = 0x04000, 111 HALFSUPPORT = 0x08000, 112 KEYCONCEPTS = 0x10000, 113 KEYOBJC2 = 0x20000, 114 KEYZVECTOR = 0x40000, 115 KEYCOROUTINES = 0x80000, 116 KEYALL = (0xfffff & ~KEYNOMS18 & 117 ~KEYNOOPENCL) // KEYNOMS18 and KEYNOOPENCL are used to exclude. 118 }; 119 120 /// \brief How a keyword is treated in the selected standard. 121 enum KeywordStatus { 122 KS_Disabled, // Disabled 123 KS_Extension, // Is an extension 124 KS_Enabled, // Enabled 125 KS_Future // Is a keyword in future standard 126 }; 127} 128 129/// \brief Translates flags as specified in TokenKinds.def into keyword status 130/// in the given language standard. 131static KeywordStatus getKeywordStatus(const LangOptions &LangOpts, 132 unsigned Flags) { 133 if (Flags == KEYALL) return KS_Enabled; 134 if (LangOpts.CPlusPlus && (Flags & KEYCXX)) return KS_Enabled; 135 if (LangOpts.CPlusPlus11 && (Flags & KEYCXX11)) return KS_Enabled; 136 if (LangOpts.C99 && (Flags & KEYC99)) return KS_Enabled; 137 if (LangOpts.GNUKeywords && (Flags & KEYGNU)) return KS_Extension; 138 if (LangOpts.MicrosoftExt && (Flags & KEYMS)) return KS_Extension; 139 if (LangOpts.Borland && (Flags & KEYBORLAND)) return KS_Extension; 140 if (LangOpts.Bool && (Flags & BOOLSUPPORT)) return KS_Enabled; 141 if (LangOpts.Half && (Flags & HALFSUPPORT)) return KS_Enabled; 142 if (LangOpts.WChar && (Flags & WCHARSUPPORT)) return KS_Enabled; 143 if (LangOpts.AltiVec && (Flags & KEYALTIVEC)) return KS_Enabled; 144 if (LangOpts.OpenCL && (Flags & KEYOPENCL)) return KS_Enabled; 145 if (!LangOpts.CPlusPlus && (Flags & KEYNOCXX)) return KS_Enabled; 146 if (LangOpts.C11 && (Flags & KEYC11)) return KS_Enabled; 147 // We treat bridge casts as objective-C keywords so we can warn on them 148 // in non-arc mode. 149 if (LangOpts.ObjC2 && (Flags & KEYARC)) return KS_Enabled; 150 if (LangOpts.ConceptsTS && (Flags & KEYCONCEPTS)) return KS_Enabled; 151 if (LangOpts.ObjC2 && (Flags & KEYOBJC2)) return KS_Enabled; 152 if (LangOpts.Coroutines && (Flags & KEYCOROUTINES)) return KS_Enabled; 153 if (LangOpts.CPlusPlus && (Flags & KEYCXX11)) return KS_Future; 154 return KS_Disabled; 155} 156 157/// AddKeyword - This method is used to associate a token ID with specific 158/// identifiers because they are language keywords. This causes the lexer to 159/// automatically map matching identifiers to specialized token codes. 160static void AddKeyword(StringRef Keyword, 161 tok::TokenKind TokenCode, unsigned Flags, 162 const LangOptions &LangOpts, IdentifierTable &Table) { 163 KeywordStatus AddResult = getKeywordStatus(LangOpts, Flags); 164 165 // Don't add this keyword under MSVCCompat. 166 if (LangOpts.MSVCCompat && (Flags & KEYNOMS18) && 167 !LangOpts.isCompatibleWithMSVC(LangOptions::MSVC2015)) 168 return; 169 170 // Don't add this keyword under OpenCL. 171 if (LangOpts.OpenCL && (Flags & KEYNOOPENCL)) 172 return; 173 174 // Don't add this keyword if disabled in this language. 175 if (AddResult == KS_Disabled) return; 176 177 IdentifierInfo &Info = 178 Table.get(Keyword, AddResult == KS_Future ? tok::identifier : TokenCode); 179 Info.setIsExtensionToken(AddResult == KS_Extension); 180 Info.setIsFutureCompatKeyword(AddResult == KS_Future); 181} 182 183/// AddCXXOperatorKeyword - Register a C++ operator keyword alternative 184/// representations. 185static void AddCXXOperatorKeyword(StringRef Keyword, 186 tok::TokenKind TokenCode, 187 IdentifierTable &Table) { 188 IdentifierInfo &Info = Table.get(Keyword, TokenCode); 189 Info.setIsCPlusPlusOperatorKeyword(); 190} 191 192/// AddObjCKeyword - Register an Objective-C \@keyword like "class" "selector" 193/// or "property". 194static void AddObjCKeyword(StringRef Name, 195 tok::ObjCKeywordKind ObjCID, 196 IdentifierTable &Table) { 197 Table.get(Name).setObjCKeywordID(ObjCID); 198} 199 200/// AddKeywords - Add all keywords to the symbol table. 201/// 202void IdentifierTable::AddKeywords(const LangOptions &LangOpts) { 203 // Add keywords and tokens for the current language. 204#define KEYWORD(NAME, FLAGS) \ 205 AddKeyword(StringRef(#NAME), tok::kw_ ## NAME, \ 206 FLAGS, LangOpts, *this); 207#define ALIAS(NAME, TOK, FLAGS) \ 208 AddKeyword(StringRef(NAME), tok::kw_ ## TOK, \ 209 FLAGS, LangOpts, *this); 210#define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \ 211 if (LangOpts.CXXOperatorNames) \ 212 AddCXXOperatorKeyword(StringRef(#NAME), tok::ALIAS, *this); 213#define OBJC1_AT_KEYWORD(NAME) \ 214 if (LangOpts.ObjC1) \ 215 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this); 216#define OBJC2_AT_KEYWORD(NAME) \ 217 if (LangOpts.ObjC2) \ 218 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this); 219#define TESTING_KEYWORD(NAME, FLAGS) 220#include "clang/Basic/TokenKinds.def" 221 222 if (LangOpts.ParseUnknownAnytype) 223 AddKeyword("__unknown_anytype", tok::kw___unknown_anytype, KEYALL, 224 LangOpts, *this); 225 226 if (LangOpts.DeclSpecKeyword) 227 AddKeyword("__declspec", tok::kw___declspec, KEYALL, LangOpts, *this); 228} 229 230/// \brief Checks if the specified token kind represents a keyword in the 231/// specified language. 232/// \returns Status of the keyword in the language. 233static KeywordStatus getTokenKwStatus(const LangOptions &LangOpts, 234 tok::TokenKind K) { 235 switch (K) { 236#define KEYWORD(NAME, FLAGS) \ 237 case tok::kw_##NAME: return getKeywordStatus(LangOpts, FLAGS); 238#include "clang/Basic/TokenKinds.def" 239 default: return KS_Disabled; 240 } 241} 242 243/// \brief Returns true if the identifier represents a keyword in the 244/// specified language. 245bool IdentifierInfo::isKeyword(const LangOptions &LangOpts) { 246 switch (getTokenKwStatus(LangOpts, getTokenID())) { 247 case KS_Enabled: 248 case KS_Extension: 249 return true; 250 default: 251 return false; 252 } 253} 254 255tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const { 256 // We use a perfect hash function here involving the length of the keyword, 257 // the first and third character. For preprocessor ID's there are no 258 // collisions (if there were, the switch below would complain about duplicate 259 // case values). Note that this depends on 'if' being null terminated. 260 261#define HASH(LEN, FIRST, THIRD) \ 262 (LEN << 5) + (((FIRST-'a') + (THIRD-'a')) & 31) 263#define CASE(LEN, FIRST, THIRD, NAME) \ 264 case HASH(LEN, FIRST, THIRD): \ 265 return memcmp(Name, #NAME, LEN) ? tok::pp_not_keyword : tok::pp_ ## NAME 266 267 unsigned Len = getLength(); 268 if (Len < 2) return tok::pp_not_keyword; 269 const char *Name = getNameStart(); 270 switch (HASH(Len, Name[0], Name[2])) { 271 default: return tok::pp_not_keyword; 272 CASE( 2, 'i', '\0', if); 273 CASE( 4, 'e', 'i', elif); 274 CASE( 4, 'e', 's', else); 275 CASE( 4, 'l', 'n', line); 276 CASE( 4, 's', 'c', sccs); 277 CASE( 5, 'e', 'd', endif); 278 CASE( 5, 'e', 'r', error); 279 CASE( 5, 'i', 'e', ident); 280 CASE( 5, 'i', 'd', ifdef); 281 CASE( 5, 'u', 'd', undef); 282 283 CASE( 6, 'a', 's', assert); 284 CASE( 6, 'd', 'f', define); 285 CASE( 6, 'i', 'n', ifndef); 286 CASE( 6, 'i', 'p', import); 287 CASE( 6, 'p', 'a', pragma); 288 289 CASE( 7, 'd', 'f', defined); 290 CASE( 7, 'i', 'c', include); 291 CASE( 7, 'w', 'r', warning); 292 293 CASE( 8, 'u', 'a', unassert); 294 CASE(12, 'i', 'c', include_next); 295 296 CASE(14, '_', 'p', __public_macro); 297 298 CASE(15, '_', 'p', __private_macro); 299 300 CASE(16, '_', 'i', __include_macros); 301#undef CASE 302#undef HASH 303 } 304} 305 306//===----------------------------------------------------------------------===// 307// Stats Implementation 308//===----------------------------------------------------------------------===// 309 310/// PrintStats - Print statistics about how well the identifier table is doing 311/// at hashing identifiers. 312void IdentifierTable::PrintStats() const { 313 unsigned NumBuckets = HashTable.getNumBuckets(); 314 unsigned NumIdentifiers = HashTable.getNumItems(); 315 unsigned NumEmptyBuckets = NumBuckets-NumIdentifiers; 316 unsigned AverageIdentifierSize = 0; 317 unsigned MaxIdentifierLength = 0; 318 319 // TODO: Figure out maximum times an identifier had to probe for -stats. 320 for (llvm::StringMap<IdentifierInfo*, llvm::BumpPtrAllocator>::const_iterator 321 I = HashTable.begin(), E = HashTable.end(); I != E; ++I) { 322 unsigned IdLen = I->getKeyLength(); 323 AverageIdentifierSize += IdLen; 324 if (MaxIdentifierLength < IdLen) 325 MaxIdentifierLength = IdLen; 326 } 327 328 fprintf(stderr, "\n*** Identifier Table Stats:\n"); 329 fprintf(stderr, "# Identifiers: %d\n", NumIdentifiers); 330 fprintf(stderr, "# Empty Buckets: %d\n", NumEmptyBuckets); 331 fprintf(stderr, "Hash density (#identifiers per bucket): %f\n", 332 NumIdentifiers/(double)NumBuckets); 333 fprintf(stderr, "Ave identifier length: %f\n", 334 (AverageIdentifierSize/(double)NumIdentifiers)); 335 fprintf(stderr, "Max identifier length: %d\n", MaxIdentifierLength); 336 337 // Compute statistics about the memory allocated for identifiers. 338 HashTable.getAllocator().PrintStats(); 339} 340 341//===----------------------------------------------------------------------===// 342// SelectorTable Implementation 343//===----------------------------------------------------------------------===// 344 345unsigned llvm::DenseMapInfo<clang::Selector>::getHashValue(clang::Selector S) { 346 return DenseMapInfo<void*>::getHashValue(S.getAsOpaquePtr()); 347} 348 349namespace clang { 350/// MultiKeywordSelector - One of these variable length records is kept for each 351/// selector containing more than one keyword. We use a folding set 352/// to unique aggregate names (keyword selectors in ObjC parlance). Access to 353/// this class is provided strictly through Selector. 354class MultiKeywordSelector 355 : public DeclarationNameExtra, public llvm::FoldingSetNode { 356 MultiKeywordSelector(unsigned nKeys) { 357 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys; 358 } 359public: 360 // Constructor for keyword selectors. 361 MultiKeywordSelector(unsigned nKeys, IdentifierInfo **IIV) { 362 assert((nKeys > 1) && "not a multi-keyword selector"); 363 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys; 364 365 // Fill in the trailing keyword array. 366 IdentifierInfo **KeyInfo = reinterpret_cast<IdentifierInfo **>(this+1); 367 for (unsigned i = 0; i != nKeys; ++i) 368 KeyInfo[i] = IIV[i]; 369 } 370 371 // getName - Derive the full selector name and return it. 372 std::string getName() const; 373 374 unsigned getNumArgs() const { return ExtraKindOrNumArgs - NUM_EXTRA_KINDS; } 375 376 typedef IdentifierInfo *const *keyword_iterator; 377 keyword_iterator keyword_begin() const { 378 return reinterpret_cast<keyword_iterator>(this+1); 379 } 380 keyword_iterator keyword_end() const { 381 return keyword_begin()+getNumArgs(); 382 } 383 IdentifierInfo *getIdentifierInfoForSlot(unsigned i) const { 384 assert(i < getNumArgs() && "getIdentifierInfoForSlot(): illegal index"); 385 return keyword_begin()[i]; 386 } 387 static void Profile(llvm::FoldingSetNodeID &ID, 388 keyword_iterator ArgTys, unsigned NumArgs) { 389 ID.AddInteger(NumArgs); 390 for (unsigned i = 0; i != NumArgs; ++i) 391 ID.AddPointer(ArgTys[i]); 392 } 393 void Profile(llvm::FoldingSetNodeID &ID) { 394 Profile(ID, keyword_begin(), getNumArgs()); 395 } 396}; 397} // end namespace clang. 398 399unsigned Selector::getNumArgs() const { 400 unsigned IIF = getIdentifierInfoFlag(); 401 if (IIF <= ZeroArg) 402 return 0; 403 if (IIF == OneArg) 404 return 1; 405 // We point to a MultiKeywordSelector. 406 MultiKeywordSelector *SI = getMultiKeywordSelector(); 407 return SI->getNumArgs(); 408} 409 410IdentifierInfo *Selector::getIdentifierInfoForSlot(unsigned argIndex) const { 411 if (getIdentifierInfoFlag() < MultiArg) { 412 assert(argIndex == 0 && "illegal keyword index"); 413 return getAsIdentifierInfo(); 414 } 415 // We point to a MultiKeywordSelector. 416 MultiKeywordSelector *SI = getMultiKeywordSelector(); 417 return SI->getIdentifierInfoForSlot(argIndex); 418} 419 420StringRef Selector::getNameForSlot(unsigned int argIndex) const { 421 IdentifierInfo *II = getIdentifierInfoForSlot(argIndex); 422 return II? II->getName() : StringRef(); 423} 424 425std::string MultiKeywordSelector::getName() const { 426 SmallString<256> Str; 427 llvm::raw_svector_ostream OS(Str); 428 for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) { 429 if (*I) 430 OS << (*I)->getName(); 431 OS << ':'; 432 } 433 434 return OS.str(); 435} 436 437std::string Selector::getAsString() const { 438 if (InfoPtr == 0) 439 return "<null selector>"; 440 441 if (getIdentifierInfoFlag() < MultiArg) { 442 IdentifierInfo *II = getAsIdentifierInfo(); 443 444 // If the number of arguments is 0 then II is guaranteed to not be null. 445 if (getNumArgs() == 0) 446 return II->getName(); 447 448 if (!II) 449 return ":"; 450 451 return II->getName().str() + ":"; 452 } 453 454 // We have a multiple keyword selector. 455 return getMultiKeywordSelector()->getName(); 456} 457 458void Selector::print(llvm::raw_ostream &OS) const { 459 OS << getAsString(); 460} 461 462/// Interpreting the given string using the normal CamelCase 463/// conventions, determine whether the given string starts with the 464/// given "word", which is assumed to end in a lowercase letter. 465static bool startsWithWord(StringRef name, StringRef word) { 466 if (name.size() < word.size()) return false; 467 return ((name.size() == word.size() || !isLowercase(name[word.size()])) && 468 name.startswith(word)); 469} 470 471ObjCMethodFamily Selector::getMethodFamilyImpl(Selector sel) { 472 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); 473 if (!first) return OMF_None; 474 475 StringRef name = first->getName(); 476 if (sel.isUnarySelector()) { 477 if (name == "autorelease") return OMF_autorelease; 478 if (name == "dealloc") return OMF_dealloc; 479 if (name == "finalize") return OMF_finalize; 480 if (name == "release") return OMF_release; 481 if (name == "retain") return OMF_retain; 482 if (name == "retainCount") return OMF_retainCount; 483 if (name == "self") return OMF_self; 484 if (name == "initialize") return OMF_initialize; 485 } 486 487 if (name == "performSelector") return OMF_performSelector; 488 489 // The other method families may begin with a prefix of underscores. 490 while (!name.empty() && name.front() == '_') 491 name = name.substr(1); 492 493 if (name.empty()) return OMF_None; 494 switch (name.front()) { 495 case 'a': 496 if (startsWithWord(name, "alloc")) return OMF_alloc; 497 break; 498 case 'c': 499 if (startsWithWord(name, "copy")) return OMF_copy; 500 break; 501 case 'i': 502 if (startsWithWord(name, "init")) return OMF_init; 503 break; 504 case 'm': 505 if (startsWithWord(name, "mutableCopy")) return OMF_mutableCopy; 506 break; 507 case 'n': 508 if (startsWithWord(name, "new")) return OMF_new; 509 break; 510 default: 511 break; 512 } 513 514 return OMF_None; 515} 516 517ObjCInstanceTypeFamily Selector::getInstTypeMethodFamily(Selector sel) { 518 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); 519 if (!first) return OIT_None; 520 521 StringRef name = first->getName(); 522 523 if (name.empty()) return OIT_None; 524 switch (name.front()) { 525 case 'a': 526 if (startsWithWord(name, "array")) return OIT_Array; 527 break; 528 case 'd': 529 if (startsWithWord(name, "default")) return OIT_ReturnsSelf; 530 if (startsWithWord(name, "dictionary")) return OIT_Dictionary; 531 break; 532 case 's': 533 if (startsWithWord(name, "shared")) return OIT_ReturnsSelf; 534 if (startsWithWord(name, "standard")) return OIT_Singleton; 535 case 'i': 536 if (startsWithWord(name, "init")) return OIT_Init; 537 default: 538 break; 539 } 540 return OIT_None; 541} 542 543ObjCStringFormatFamily Selector::getStringFormatFamilyImpl(Selector sel) { 544 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); 545 if (!first) return SFF_None; 546 547 StringRef name = first->getName(); 548 549 switch (name.front()) { 550 case 'a': 551 if (name == "appendFormat") return SFF_NSString; 552 break; 553 554 case 'i': 555 if (name == "initWithFormat") return SFF_NSString; 556 break; 557 558 case 'l': 559 if (name == "localizedStringWithFormat") return SFF_NSString; 560 break; 561 562 case 's': 563 if (name == "stringByAppendingFormat" || 564 name == "stringWithFormat") return SFF_NSString; 565 break; 566 } 567 return SFF_None; 568} 569 570namespace { 571 struct SelectorTableImpl { 572 llvm::FoldingSet<MultiKeywordSelector> Table; 573 llvm::BumpPtrAllocator Allocator; 574 }; 575} // end anonymous namespace. 576 577static SelectorTableImpl &getSelectorTableImpl(void *P) { 578 return *static_cast<SelectorTableImpl*>(P); 579} 580 581SmallString<64> 582SelectorTable::constructSetterName(StringRef Name) { 583 SmallString<64> SetterName("set"); 584 SetterName += Name; 585 SetterName[3] = toUppercase(SetterName[3]); 586 return SetterName; 587} 588 589Selector 590SelectorTable::constructSetterSelector(IdentifierTable &Idents, 591 SelectorTable &SelTable, 592 const IdentifierInfo *Name) { 593 IdentifierInfo *SetterName = 594 &Idents.get(constructSetterName(Name->getName())); 595 return SelTable.getUnarySelector(SetterName); 596} 597 598size_t SelectorTable::getTotalMemory() const { 599 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl); 600 return SelTabImpl.Allocator.getTotalMemory(); 601} 602 603Selector SelectorTable::getSelector(unsigned nKeys, IdentifierInfo **IIV) { 604 if (nKeys < 2) 605 return Selector(IIV[0], nKeys); 606 607 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl); 608 609 // Unique selector, to guarantee there is one per name. 610 llvm::FoldingSetNodeID ID; 611 MultiKeywordSelector::Profile(ID, IIV, nKeys); 612 613 void *InsertPos = nullptr; 614 if (MultiKeywordSelector *SI = 615 SelTabImpl.Table.FindNodeOrInsertPos(ID, InsertPos)) 616 return Selector(SI); 617 618 // MultiKeywordSelector objects are not allocated with new because they have a 619 // variable size array (for parameter types) at the end of them. 620 unsigned Size = sizeof(MultiKeywordSelector) + nKeys*sizeof(IdentifierInfo *); 621 MultiKeywordSelector *SI = 622 (MultiKeywordSelector*)SelTabImpl.Allocator.Allocate(Size, 623 llvm::alignOf<MultiKeywordSelector>()); 624 new (SI) MultiKeywordSelector(nKeys, IIV); 625 SelTabImpl.Table.InsertNode(SI, InsertPos); 626 return Selector(SI); 627} 628 629SelectorTable::SelectorTable() { 630 Impl = new SelectorTableImpl(); 631} 632 633SelectorTable::~SelectorTable() { 634 delete &getSelectorTableImpl(Impl); 635} 636 637const char *clang::getOperatorSpelling(OverloadedOperatorKind Operator) { 638 switch (Operator) { 639 case OO_None: 640 case NUM_OVERLOADED_OPERATORS: 641 return nullptr; 642 643#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ 644 case OO_##Name: return Spelling; 645#include "clang/Basic/OperatorKinds.def" 646 } 647 648 llvm_unreachable("Invalid OverloadedOperatorKind!"); 649} 650 651StringRef clang::getNullabilitySpelling(NullabilityKind kind, 652 bool isContextSensitive) { 653 switch (kind) { 654 case NullabilityKind::NonNull: 655 return isContextSensitive ? "nonnull" : "_Nonnull"; 656 657 case NullabilityKind::Nullable: 658 return isContextSensitive ? "nullable" : "_Nullable"; 659 660 case NullabilityKind::Unspecified: 661 return isContextSensitive ? "null_unspecified" : "_Null_unspecified"; 662 } 663 llvm_unreachable("Unknown nullability kind."); 664} 665