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 "llvm/ADT/DenseMap.h"
20 #include "llvm/ADT/FoldingSet.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include <cstdio>
25
26 using namespace clang;
27
28 //===----------------------------------------------------------------------===//
29 // IdentifierInfo Implementation
30 //===----------------------------------------------------------------------===//
31
IdentifierInfo()32 IdentifierInfo::IdentifierInfo() {
33 TokenID = tok::identifier;
34 ObjCOrBuiltinID = 0;
35 HasMacro = false;
36 HadMacro = false;
37 IsExtension = false;
38 IsCXX11CompatKeyword = false;
39 IsPoisoned = false;
40 IsCPPOperatorKeyword = false;
41 NeedsHandleIdentifier = false;
42 IsFromAST = false;
43 ChangedAfterLoad = false;
44 RevertedTokenID = false;
45 OutOfDate = false;
46 IsModulesImport = false;
47 FETokenInfo = nullptr;
48 Entry = nullptr;
49 }
50
51 //===----------------------------------------------------------------------===//
52 // IdentifierTable Implementation
53 //===----------------------------------------------------------------------===//
54
~IdentifierIterator()55 IdentifierIterator::~IdentifierIterator() { }
56
~IdentifierInfoLookup()57 IdentifierInfoLookup::~IdentifierInfoLookup() {}
58
59 namespace {
60 /// \brief A simple identifier lookup iterator that represents an
61 /// empty sequence of identifiers.
62 class EmptyLookupIterator : public IdentifierIterator
63 {
64 public:
Next()65 StringRef Next() override { return StringRef(); }
66 };
67 }
68
getIdentifiers()69 IdentifierIterator *IdentifierInfoLookup::getIdentifiers() {
70 return new EmptyLookupIterator();
71 }
72
~ExternalIdentifierLookup()73 ExternalIdentifierLookup::~ExternalIdentifierLookup() {}
74
IdentifierTable(const LangOptions & LangOpts,IdentifierInfoLookup * externalLookup)75 IdentifierTable::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
94 namespace {
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 KEYALL = (0xffff & ~KEYNOMS18 &
113 ~KEYNOOPENCL) // KEYNOMS18 and KEYNOOPENCL are used to exclude.
114 };
115
116 /// \brief How a keyword is treated in the selected standard.
117 enum KeywordStatus {
118 KS_Disabled, // Disabled
119 KS_Extension, // Is an extension
120 KS_Enabled, // Enabled
121 KS_Future // Is a keyword in future standard
122 };
123 }
124
125 /// \brief Translates flags as specified in TokenKinds.def into keyword status
126 /// in the given language standard.
getKeywordStatus(const LangOptions & LangOpts,unsigned Flags)127 static KeywordStatus getKeywordStatus(const LangOptions &LangOpts,
128 unsigned Flags) {
129 if (Flags == KEYALL) return KS_Enabled;
130 if (LangOpts.CPlusPlus && (Flags & KEYCXX)) return KS_Enabled;
131 if (LangOpts.CPlusPlus11 && (Flags & KEYCXX11)) return KS_Enabled;
132 if (LangOpts.C99 && (Flags & KEYC99)) return KS_Enabled;
133 if (LangOpts.GNUKeywords && (Flags & KEYGNU)) return KS_Extension;
134 if (LangOpts.MicrosoftExt && (Flags & KEYMS)) return KS_Extension;
135 if (LangOpts.Borland && (Flags & KEYBORLAND)) return KS_Extension;
136 if (LangOpts.Bool && (Flags & BOOLSUPPORT)) return KS_Enabled;
137 if (LangOpts.Half && (Flags & HALFSUPPORT)) return KS_Enabled;
138 if (LangOpts.WChar && (Flags & WCHARSUPPORT)) return KS_Enabled;
139 if (LangOpts.AltiVec && (Flags & KEYALTIVEC)) return KS_Enabled;
140 if (LangOpts.OpenCL && (Flags & KEYOPENCL)) return KS_Enabled;
141 if (!LangOpts.CPlusPlus && (Flags & KEYNOCXX)) return KS_Enabled;
142 if (LangOpts.C11 && (Flags & KEYC11)) return KS_Enabled;
143 // We treat bridge casts as objective-C keywords so we can warn on them
144 // in non-arc mode.
145 if (LangOpts.ObjC2 && (Flags & KEYARC)) return KS_Enabled;
146 if (LangOpts.CPlusPlus && (Flags & KEYCXX11)) return KS_Future;
147 return KS_Disabled;
148 }
149
150 /// AddKeyword - This method is used to associate a token ID with specific
151 /// identifiers because they are language keywords. This causes the lexer to
152 /// automatically map matching identifiers to specialized token codes.
AddKeyword(StringRef Keyword,tok::TokenKind TokenCode,unsigned Flags,const LangOptions & LangOpts,IdentifierTable & Table)153 static void AddKeyword(StringRef Keyword,
154 tok::TokenKind TokenCode, unsigned Flags,
155 const LangOptions &LangOpts, IdentifierTable &Table) {
156 KeywordStatus AddResult = getKeywordStatus(LangOpts, Flags);
157
158 // Don't add this keyword under MSVCCompat.
159 if (LangOpts.MSVCCompat && (Flags & KEYNOMS18) &&
160 !LangOpts.isCompatibleWithMSVC(19))
161 return;
162
163 // Don't add this keyword under OpenCL.
164 if (LangOpts.OpenCL && (Flags & KEYNOOPENCL))
165 return;
166
167 // Don't add this keyword if disabled in this language.
168 if (AddResult == KS_Disabled) return;
169
170 IdentifierInfo &Info =
171 Table.get(Keyword, AddResult == KS_Future ? tok::identifier : TokenCode);
172 Info.setIsExtensionToken(AddResult == KS_Extension);
173 Info.setIsCXX11CompatKeyword(AddResult == KS_Future);
174 }
175
176 /// AddCXXOperatorKeyword - Register a C++ operator keyword alternative
177 /// representations.
AddCXXOperatorKeyword(StringRef Keyword,tok::TokenKind TokenCode,IdentifierTable & Table)178 static void AddCXXOperatorKeyword(StringRef Keyword,
179 tok::TokenKind TokenCode,
180 IdentifierTable &Table) {
181 IdentifierInfo &Info = Table.get(Keyword, TokenCode);
182 Info.setIsCPlusPlusOperatorKeyword();
183 }
184
185 /// AddObjCKeyword - Register an Objective-C \@keyword like "class" "selector"
186 /// or "property".
AddObjCKeyword(StringRef Name,tok::ObjCKeywordKind ObjCID,IdentifierTable & Table)187 static void AddObjCKeyword(StringRef Name,
188 tok::ObjCKeywordKind ObjCID,
189 IdentifierTable &Table) {
190 Table.get(Name).setObjCKeywordID(ObjCID);
191 }
192
193 /// AddKeywords - Add all keywords to the symbol table.
194 ///
AddKeywords(const LangOptions & LangOpts)195 void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
196 // Add keywords and tokens for the current language.
197 #define KEYWORD(NAME, FLAGS) \
198 AddKeyword(StringRef(#NAME), tok::kw_ ## NAME, \
199 FLAGS, LangOpts, *this);
200 #define ALIAS(NAME, TOK, FLAGS) \
201 AddKeyword(StringRef(NAME), tok::kw_ ## TOK, \
202 FLAGS, LangOpts, *this);
203 #define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \
204 if (LangOpts.CXXOperatorNames) \
205 AddCXXOperatorKeyword(StringRef(#NAME), tok::ALIAS, *this);
206 #define OBJC1_AT_KEYWORD(NAME) \
207 if (LangOpts.ObjC1) \
208 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this);
209 #define OBJC2_AT_KEYWORD(NAME) \
210 if (LangOpts.ObjC2) \
211 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this);
212 #define TESTING_KEYWORD(NAME, FLAGS)
213 #include "clang/Basic/TokenKinds.def"
214
215 if (LangOpts.ParseUnknownAnytype)
216 AddKeyword("__unknown_anytype", tok::kw___unknown_anytype, KEYALL,
217 LangOpts, *this);
218 }
219
220 /// \brief Checks if the specified token kind represents a keyword in the
221 /// specified language.
222 /// \returns Status of the keyword in the language.
getTokenKwStatus(const LangOptions & LangOpts,tok::TokenKind K)223 static KeywordStatus getTokenKwStatus(const LangOptions &LangOpts,
224 tok::TokenKind K) {
225 switch (K) {
226 #define KEYWORD(NAME, FLAGS) \
227 case tok::kw_##NAME: return getKeywordStatus(LangOpts, FLAGS);
228 #include "clang/Basic/TokenKinds.def"
229 default: return KS_Disabled;
230 }
231 }
232
233 /// \brief Returns true if the identifier represents a keyword in the
234 /// specified language.
isKeyword(const LangOptions & LangOpts)235 bool IdentifierInfo::isKeyword(const LangOptions &LangOpts) {
236 switch (getTokenKwStatus(LangOpts, getTokenID())) {
237 case KS_Enabled:
238 case KS_Extension:
239 return true;
240 default:
241 return false;
242 }
243 }
244
getPPKeywordID() const245 tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const {
246 // We use a perfect hash function here involving the length of the keyword,
247 // the first and third character. For preprocessor ID's there are no
248 // collisions (if there were, the switch below would complain about duplicate
249 // case values). Note that this depends on 'if' being null terminated.
250
251 #define HASH(LEN, FIRST, THIRD) \
252 (LEN << 5) + (((FIRST-'a') + (THIRD-'a')) & 31)
253 #define CASE(LEN, FIRST, THIRD, NAME) \
254 case HASH(LEN, FIRST, THIRD): \
255 return memcmp(Name, #NAME, LEN) ? tok::pp_not_keyword : tok::pp_ ## NAME
256
257 unsigned Len = getLength();
258 if (Len < 2) return tok::pp_not_keyword;
259 const char *Name = getNameStart();
260 switch (HASH(Len, Name[0], Name[2])) {
261 default: return tok::pp_not_keyword;
262 CASE( 2, 'i', '\0', if);
263 CASE( 4, 'e', 'i', elif);
264 CASE( 4, 'e', 's', else);
265 CASE( 4, 'l', 'n', line);
266 CASE( 4, 's', 'c', sccs);
267 CASE( 5, 'e', 'd', endif);
268 CASE( 5, 'e', 'r', error);
269 CASE( 5, 'i', 'e', ident);
270 CASE( 5, 'i', 'd', ifdef);
271 CASE( 5, 'u', 'd', undef);
272
273 CASE( 6, 'a', 's', assert);
274 CASE( 6, 'd', 'f', define);
275 CASE( 6, 'i', 'n', ifndef);
276 CASE( 6, 'i', 'p', import);
277 CASE( 6, 'p', 'a', pragma);
278
279 CASE( 7, 'd', 'f', defined);
280 CASE( 7, 'i', 'c', include);
281 CASE( 7, 'w', 'r', warning);
282
283 CASE( 8, 'u', 'a', unassert);
284 CASE(12, 'i', 'c', include_next);
285
286 CASE(14, '_', 'p', __public_macro);
287
288 CASE(15, '_', 'p', __private_macro);
289
290 CASE(16, '_', 'i', __include_macros);
291 #undef CASE
292 #undef HASH
293 }
294 }
295
296 //===----------------------------------------------------------------------===//
297 // Stats Implementation
298 //===----------------------------------------------------------------------===//
299
300 /// PrintStats - Print statistics about how well the identifier table is doing
301 /// at hashing identifiers.
PrintStats() const302 void IdentifierTable::PrintStats() const {
303 unsigned NumBuckets = HashTable.getNumBuckets();
304 unsigned NumIdentifiers = HashTable.getNumItems();
305 unsigned NumEmptyBuckets = NumBuckets-NumIdentifiers;
306 unsigned AverageIdentifierSize = 0;
307 unsigned MaxIdentifierLength = 0;
308
309 // TODO: Figure out maximum times an identifier had to probe for -stats.
310 for (llvm::StringMap<IdentifierInfo*, llvm::BumpPtrAllocator>::const_iterator
311 I = HashTable.begin(), E = HashTable.end(); I != E; ++I) {
312 unsigned IdLen = I->getKeyLength();
313 AverageIdentifierSize += IdLen;
314 if (MaxIdentifierLength < IdLen)
315 MaxIdentifierLength = IdLen;
316 }
317
318 fprintf(stderr, "\n*** Identifier Table Stats:\n");
319 fprintf(stderr, "# Identifiers: %d\n", NumIdentifiers);
320 fprintf(stderr, "# Empty Buckets: %d\n", NumEmptyBuckets);
321 fprintf(stderr, "Hash density (#identifiers per bucket): %f\n",
322 NumIdentifiers/(double)NumBuckets);
323 fprintf(stderr, "Ave identifier length: %f\n",
324 (AverageIdentifierSize/(double)NumIdentifiers));
325 fprintf(stderr, "Max identifier length: %d\n", MaxIdentifierLength);
326
327 // Compute statistics about the memory allocated for identifiers.
328 HashTable.getAllocator().PrintStats();
329 }
330
331 //===----------------------------------------------------------------------===//
332 // SelectorTable Implementation
333 //===----------------------------------------------------------------------===//
334
getHashValue(clang::Selector S)335 unsigned llvm::DenseMapInfo<clang::Selector>::getHashValue(clang::Selector S) {
336 return DenseMapInfo<void*>::getHashValue(S.getAsOpaquePtr());
337 }
338
339 namespace clang {
340 /// MultiKeywordSelector - One of these variable length records is kept for each
341 /// selector containing more than one keyword. We use a folding set
342 /// to unique aggregate names (keyword selectors in ObjC parlance). Access to
343 /// this class is provided strictly through Selector.
344 class MultiKeywordSelector
345 : public DeclarationNameExtra, public llvm::FoldingSetNode {
MultiKeywordSelector(unsigned nKeys)346 MultiKeywordSelector(unsigned nKeys) {
347 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys;
348 }
349 public:
350 // Constructor for keyword selectors.
MultiKeywordSelector(unsigned nKeys,IdentifierInfo ** IIV)351 MultiKeywordSelector(unsigned nKeys, IdentifierInfo **IIV) {
352 assert((nKeys > 1) && "not a multi-keyword selector");
353 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys;
354
355 // Fill in the trailing keyword array.
356 IdentifierInfo **KeyInfo = reinterpret_cast<IdentifierInfo **>(this+1);
357 for (unsigned i = 0; i != nKeys; ++i)
358 KeyInfo[i] = IIV[i];
359 }
360
361 // getName - Derive the full selector name and return it.
362 std::string getName() const;
363
getNumArgs() const364 unsigned getNumArgs() const { return ExtraKindOrNumArgs - NUM_EXTRA_KINDS; }
365
366 typedef IdentifierInfo *const *keyword_iterator;
keyword_begin() const367 keyword_iterator keyword_begin() const {
368 return reinterpret_cast<keyword_iterator>(this+1);
369 }
keyword_end() const370 keyword_iterator keyword_end() const {
371 return keyword_begin()+getNumArgs();
372 }
getIdentifierInfoForSlot(unsigned i) const373 IdentifierInfo *getIdentifierInfoForSlot(unsigned i) const {
374 assert(i < getNumArgs() && "getIdentifierInfoForSlot(): illegal index");
375 return keyword_begin()[i];
376 }
Profile(llvm::FoldingSetNodeID & ID,keyword_iterator ArgTys,unsigned NumArgs)377 static void Profile(llvm::FoldingSetNodeID &ID,
378 keyword_iterator ArgTys, unsigned NumArgs) {
379 ID.AddInteger(NumArgs);
380 for (unsigned i = 0; i != NumArgs; ++i)
381 ID.AddPointer(ArgTys[i]);
382 }
Profile(llvm::FoldingSetNodeID & ID)383 void Profile(llvm::FoldingSetNodeID &ID) {
384 Profile(ID, keyword_begin(), getNumArgs());
385 }
386 };
387 } // end namespace clang.
388
getNumArgs() const389 unsigned Selector::getNumArgs() const {
390 unsigned IIF = getIdentifierInfoFlag();
391 if (IIF <= ZeroArg)
392 return 0;
393 if (IIF == OneArg)
394 return 1;
395 // We point to a MultiKeywordSelector.
396 MultiKeywordSelector *SI = getMultiKeywordSelector();
397 return SI->getNumArgs();
398 }
399
getIdentifierInfoForSlot(unsigned argIndex) const400 IdentifierInfo *Selector::getIdentifierInfoForSlot(unsigned argIndex) const {
401 if (getIdentifierInfoFlag() < MultiArg) {
402 assert(argIndex == 0 && "illegal keyword index");
403 return getAsIdentifierInfo();
404 }
405 // We point to a MultiKeywordSelector.
406 MultiKeywordSelector *SI = getMultiKeywordSelector();
407 return SI->getIdentifierInfoForSlot(argIndex);
408 }
409
getNameForSlot(unsigned int argIndex) const410 StringRef Selector::getNameForSlot(unsigned int argIndex) const {
411 IdentifierInfo *II = getIdentifierInfoForSlot(argIndex);
412 return II? II->getName() : StringRef();
413 }
414
getName() const415 std::string MultiKeywordSelector::getName() const {
416 SmallString<256> Str;
417 llvm::raw_svector_ostream OS(Str);
418 for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) {
419 if (*I)
420 OS << (*I)->getName();
421 OS << ':';
422 }
423
424 return OS.str();
425 }
426
getAsString() const427 std::string Selector::getAsString() const {
428 if (InfoPtr == 0)
429 return "<null selector>";
430
431 if (getIdentifierInfoFlag() < MultiArg) {
432 IdentifierInfo *II = getAsIdentifierInfo();
433
434 // If the number of arguments is 0 then II is guaranteed to not be null.
435 if (getNumArgs() == 0)
436 return II->getName();
437
438 if (!II)
439 return ":";
440
441 return II->getName().str() + ":";
442 }
443
444 // We have a multiple keyword selector.
445 return getMultiKeywordSelector()->getName();
446 }
447
print(llvm::raw_ostream & OS) const448 void Selector::print(llvm::raw_ostream &OS) const {
449 OS << getAsString();
450 }
451
452 /// Interpreting the given string using the normal CamelCase
453 /// conventions, determine whether the given string starts with the
454 /// given "word", which is assumed to end in a lowercase letter.
startsWithWord(StringRef name,StringRef word)455 static bool startsWithWord(StringRef name, StringRef word) {
456 if (name.size() < word.size()) return false;
457 return ((name.size() == word.size() || !isLowercase(name[word.size()])) &&
458 name.startswith(word));
459 }
460
getMethodFamilyImpl(Selector sel)461 ObjCMethodFamily Selector::getMethodFamilyImpl(Selector sel) {
462 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0);
463 if (!first) return OMF_None;
464
465 StringRef name = first->getName();
466 if (sel.isUnarySelector()) {
467 if (name == "autorelease") return OMF_autorelease;
468 if (name == "dealloc") return OMF_dealloc;
469 if (name == "finalize") return OMF_finalize;
470 if (name == "release") return OMF_release;
471 if (name == "retain") return OMF_retain;
472 if (name == "retainCount") return OMF_retainCount;
473 if (name == "self") return OMF_self;
474 if (name == "initialize") return OMF_initialize;
475 }
476
477 if (name == "performSelector") return OMF_performSelector;
478
479 // The other method families may begin with a prefix of underscores.
480 while (!name.empty() && name.front() == '_')
481 name = name.substr(1);
482
483 if (name.empty()) return OMF_None;
484 switch (name.front()) {
485 case 'a':
486 if (startsWithWord(name, "alloc")) return OMF_alloc;
487 break;
488 case 'c':
489 if (startsWithWord(name, "copy")) return OMF_copy;
490 break;
491 case 'i':
492 if (startsWithWord(name, "init")) return OMF_init;
493 break;
494 case 'm':
495 if (startsWithWord(name, "mutableCopy")) return OMF_mutableCopy;
496 break;
497 case 'n':
498 if (startsWithWord(name, "new")) return OMF_new;
499 break;
500 default:
501 break;
502 }
503
504 return OMF_None;
505 }
506
getInstTypeMethodFamily(Selector sel)507 ObjCInstanceTypeFamily Selector::getInstTypeMethodFamily(Selector sel) {
508 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0);
509 if (!first) return OIT_None;
510
511 StringRef name = first->getName();
512
513 if (name.empty()) return OIT_None;
514 switch (name.front()) {
515 case 'a':
516 if (startsWithWord(name, "array")) return OIT_Array;
517 break;
518 case 'd':
519 if (startsWithWord(name, "default")) return OIT_ReturnsSelf;
520 if (startsWithWord(name, "dictionary")) return OIT_Dictionary;
521 break;
522 case 's':
523 if (startsWithWord(name, "shared")) return OIT_ReturnsSelf;
524 if (startsWithWord(name, "standard")) return OIT_Singleton;
525 case 'i':
526 if (startsWithWord(name, "init")) return OIT_Init;
527 default:
528 break;
529 }
530 return OIT_None;
531 }
532
getStringFormatFamilyImpl(Selector sel)533 ObjCStringFormatFamily Selector::getStringFormatFamilyImpl(Selector sel) {
534 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0);
535 if (!first) return SFF_None;
536
537 StringRef name = first->getName();
538
539 switch (name.front()) {
540 case 'a':
541 if (name == "appendFormat") return SFF_NSString;
542 break;
543
544 case 'i':
545 if (name == "initWithFormat") return SFF_NSString;
546 break;
547
548 case 'l':
549 if (name == "localizedStringWithFormat") return SFF_NSString;
550 break;
551
552 case 's':
553 if (name == "stringByAppendingFormat" ||
554 name == "stringWithFormat") return SFF_NSString;
555 break;
556 }
557 return SFF_None;
558 }
559
560 namespace {
561 struct SelectorTableImpl {
562 llvm::FoldingSet<MultiKeywordSelector> Table;
563 llvm::BumpPtrAllocator Allocator;
564 };
565 } // end anonymous namespace.
566
getSelectorTableImpl(void * P)567 static SelectorTableImpl &getSelectorTableImpl(void *P) {
568 return *static_cast<SelectorTableImpl*>(P);
569 }
570
571 SmallString<64>
constructSetterName(StringRef Name)572 SelectorTable::constructSetterName(StringRef Name) {
573 SmallString<64> SetterName("set");
574 SetterName += Name;
575 SetterName[3] = toUppercase(SetterName[3]);
576 return SetterName;
577 }
578
579 Selector
constructSetterSelector(IdentifierTable & Idents,SelectorTable & SelTable,const IdentifierInfo * Name)580 SelectorTable::constructSetterSelector(IdentifierTable &Idents,
581 SelectorTable &SelTable,
582 const IdentifierInfo *Name) {
583 IdentifierInfo *SetterName =
584 &Idents.get(constructSetterName(Name->getName()));
585 return SelTable.getUnarySelector(SetterName);
586 }
587
getTotalMemory() const588 size_t SelectorTable::getTotalMemory() const {
589 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl);
590 return SelTabImpl.Allocator.getTotalMemory();
591 }
592
getSelector(unsigned nKeys,IdentifierInfo ** IIV)593 Selector SelectorTable::getSelector(unsigned nKeys, IdentifierInfo **IIV) {
594 if (nKeys < 2)
595 return Selector(IIV[0], nKeys);
596
597 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl);
598
599 // Unique selector, to guarantee there is one per name.
600 llvm::FoldingSetNodeID ID;
601 MultiKeywordSelector::Profile(ID, IIV, nKeys);
602
603 void *InsertPos = nullptr;
604 if (MultiKeywordSelector *SI =
605 SelTabImpl.Table.FindNodeOrInsertPos(ID, InsertPos))
606 return Selector(SI);
607
608 // MultiKeywordSelector objects are not allocated with new because they have a
609 // variable size array (for parameter types) at the end of them.
610 unsigned Size = sizeof(MultiKeywordSelector) + nKeys*sizeof(IdentifierInfo *);
611 MultiKeywordSelector *SI =
612 (MultiKeywordSelector*)SelTabImpl.Allocator.Allocate(Size,
613 llvm::alignOf<MultiKeywordSelector>());
614 new (SI) MultiKeywordSelector(nKeys, IIV);
615 SelTabImpl.Table.InsertNode(SI, InsertPos);
616 return Selector(SI);
617 }
618
SelectorTable()619 SelectorTable::SelectorTable() {
620 Impl = new SelectorTableImpl();
621 }
622
~SelectorTable()623 SelectorTable::~SelectorTable() {
624 delete &getSelectorTableImpl(Impl);
625 }
626
getOperatorSpelling(OverloadedOperatorKind Operator)627 const char *clang::getOperatorSpelling(OverloadedOperatorKind Operator) {
628 switch (Operator) {
629 case OO_None:
630 case NUM_OVERLOADED_OPERATORS:
631 return nullptr;
632
633 #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
634 case OO_##Name: return Spelling;
635 #include "clang/Basic/OperatorKinds.def"
636 }
637
638 llvm_unreachable("Invalid OverloadedOperatorKind!");
639 }
640