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Reid Spencer5f016e22007-07-11 17:01:13 +00001//===--- IdentifierTable.cpp - Hash table for identifier lookup -----------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner0bc735f2007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Reid Spencer5f016e22007-07-11 17:01:13 +00007//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the IdentifierInfo, IdentifierVisitor, and
11// IdentifierTable interfaces.
12//
13//===----------------------------------------------------------------------===//
14
Chris Lattnerc7229c32007-10-07 08:58:51 +000015#include "clang/Basic/IdentifierTable.h"
Reid Spencer5f016e22007-07-11 17:01:13 +000016#include "clang/Basic/LangOptions.h"
Steve Naroff29238a02007-10-05 18:42:47 +000017#include "llvm/ADT/FoldingSet.h"
Chris Lattner85994262007-10-05 20:15:24 +000018#include "llvm/ADT/DenseMap.h"
Benjamin Kramer8fe83e12012-02-04 13:45:25 +000019#include "llvm/ADT/SmallString.h"
John McCallf85e1932011-06-15 23:02:42 +000020#include "llvm/ADT/StringSwitch.h"
Daniel Dunbar76b61cc2009-10-17 18:13:02 +000021#include "llvm/Support/raw_ostream.h"
David Blaikie7530c032012-01-17 06:56:22 +000022#include "llvm/Support/ErrorHandling.h"
Chris Lattner3daed522009-03-02 22:20:04 +000023#include <cstdio>
Ted Kremenekc637e6b2007-10-23 22:18:37 +000024
Reid Spencer5f016e22007-07-11 17:01:13 +000025using namespace clang;
26
27//===----------------------------------------------------------------------===//
28// IdentifierInfo Implementation
29//===----------------------------------------------------------------------===//
30
Ted Kremenekea9c26b2009-01-20 23:28:34 +000031IdentifierInfo::IdentifierInfo() {
Reid Spencer5f016e22007-07-11 17:01:13 +000032 TokenID = tok::identifier;
Douglas Gregor5142af32008-11-06 16:32:23 +000033 ObjCOrBuiltinID = 0;
Chris Lattner4365a7e2007-10-07 07:09:52 +000034 HasMacro = false;
Reid Spencer5f016e22007-07-11 17:01:13 +000035 IsExtension = false;
Richard Smith98d86b92011-10-11 19:57:52 +000036 IsCXX11CompatKeyword = false;
Reid Spencer5f016e22007-07-11 17:01:13 +000037 IsPoisoned = false;
Reid Spencer5f016e22007-07-11 17:01:13 +000038 IsCPPOperatorKeyword = false;
Chris Lattner6a170eb2009-01-21 07:43:11 +000039 NeedsHandleIdentifier = false;
Sebastian Redl3c7f4132010-08-18 23:57:06 +000040 IsFromAST = false;
Douglas Gregoreee242f2011-10-27 09:33:13 +000041 ChangedAfterLoad = false;
Argyrios Kyrtzidis646395b2010-08-11 22:55:12 +000042 RevertedTokenID = false;
Douglas Gregoreee242f2011-10-27 09:33:13 +000043 OutOfDate = false;
Ted Kremenek32ad2ee2012-03-01 22:07:04 +000044 IsModulesImport = false;
Reid Spencer5f016e22007-07-11 17:01:13 +000045 FETokenInfo = 0;
Ted Kremenekea9c26b2009-01-20 23:28:34 +000046 Entry = 0;
Reid Spencer5f016e22007-07-11 17:01:13 +000047}
48
Reid Spencer5f016e22007-07-11 17:01:13 +000049//===----------------------------------------------------------------------===//
50// IdentifierTable Implementation
51//===----------------------------------------------------------------------===//
52
Douglas Gregor95f42922010-10-14 22:11:03 +000053IdentifierIterator::~IdentifierIterator() { }
54
Ted Kremenek72b1b152009-01-15 18:47:46 +000055IdentifierInfoLookup::~IdentifierInfoLookup() {}
56
Douglas Gregor95f42922010-10-14 22:11:03 +000057namespace {
58 /// \brief A simple identifier lookup iterator that represents an
59 /// empty sequence of identifiers.
60 class EmptyLookupIterator : public IdentifierIterator
61 {
62 public:
Chris Lattner5f9e2722011-07-23 10:55:15 +000063 virtual StringRef Next() { return StringRef(); }
Douglas Gregor95f42922010-10-14 22:11:03 +000064 };
65}
66
67IdentifierIterator *IdentifierInfoLookup::getIdentifiers() const {
68 return new EmptyLookupIterator();
69}
70
Douglas Gregor8c5a7602009-04-25 23:30:02 +000071ExternalIdentifierLookup::~ExternalIdentifierLookup() {}
72
Ted Kremenek72b1b152009-01-15 18:47:46 +000073IdentifierTable::IdentifierTable(const LangOptions &LangOpts,
74 IdentifierInfoLookup* externalLookup)
75 : HashTable(8192), // Start with space for 8K identifiers.
76 ExternalLookup(externalLookup) {
Reid Spencer5f016e22007-07-11 17:01:13 +000077
78 // Populate the identifier table with info about keywords for the current
79 // language.
80 AddKeywords(LangOpts);
Ted Kremenekf15e1142012-03-01 22:53:32 +000081
82
83 // Add the '_experimental_modules_import' contextual keyword.
84 get("__experimental_modules_import").setModulesImport(true);
Reid Spencer5f016e22007-07-11 17:01:13 +000085}
86
87//===----------------------------------------------------------------------===//
88// Language Keyword Implementation
89//===----------------------------------------------------------------------===//
90
Eli Friedmaneb32fde2009-04-28 03:13:54 +000091// Constants for TokenKinds.def
92namespace {
93 enum {
Dylan Noblesmith67922922011-04-09 13:34:05 +000094 KEYC99 = 0x1,
95 KEYCXX = 0x2,
96 KEYCXX0X = 0x4,
97 KEYGNU = 0x8,
98 KEYMS = 0x10,
99 BOOLSUPPORT = 0x20,
100 KEYALTIVEC = 0x40,
101 KEYNOCXX = 0x80,
102 KEYBORLAND = 0x100,
103 KEYOPENCL = 0x200,
Benjamin Kramerffbe9b92011-12-23 17:00:35 +0000104 KEYC11 = 0x400,
John McCallf85e1932011-06-15 23:02:42 +0000105 KEYARC = 0x800,
106 KEYALL = 0x0fff
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000107 };
108}
109
Reid Spencer5f016e22007-07-11 17:01:13 +0000110/// AddKeyword - This method is used to associate a token ID with specific
111/// identifiers because they are language keywords. This causes the lexer to
112/// automatically map matching identifiers to specialized token codes.
113///
Richard Smith98d86b92011-10-11 19:57:52 +0000114/// The C90/C99/CPP/CPP0x flags are set to 3 if the token is a keyword in a
115/// future language standard, set to 2 if the token should be enabled in the
Nick Lewycky0be8fb52012-03-11 23:14:21 +0000116/// specified language, set to 1 if it is an extension in the specified
Richard Smith98d86b92011-10-11 19:57:52 +0000117/// language, and set to 0 if disabled in the specified language.
Chris Lattner5f9e2722011-07-23 10:55:15 +0000118static void AddKeyword(StringRef Keyword,
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000119 tok::TokenKind TokenCode, unsigned Flags,
Reid Spencer5f016e22007-07-11 17:01:13 +0000120 const LangOptions &LangOpts, IdentifierTable &Table) {
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000121 unsigned AddResult = 0;
Dylan Noblesmith67922922011-04-09 13:34:05 +0000122 if (Flags == KEYALL) AddResult = 2;
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000123 else if (LangOpts.CPlusPlus && (Flags & KEYCXX)) AddResult = 2;
124 else if (LangOpts.CPlusPlus0x && (Flags & KEYCXX0X)) AddResult = 2;
125 else if (LangOpts.C99 && (Flags & KEYC99)) AddResult = 2;
Chandler Carrutheb5d7b72010-04-17 20:17:31 +0000126 else if (LangOpts.GNUKeywords && (Flags & KEYGNU)) AddResult = 1;
Francois Pichet62ec1f22011-09-17 17:15:52 +0000127 else if (LangOpts.MicrosoftExt && (Flags & KEYMS)) AddResult = 1;
Dawn Perchik52fc3142010-09-03 01:29:35 +0000128 else if (LangOpts.Borland && (Flags & KEYBORLAND)) AddResult = 1;
Chris Lattnere4f21422009-06-30 01:26:17 +0000129 else if (LangOpts.Bool && (Flags & BOOLSUPPORT)) AddResult = 2;
John Thompson82287d12010-02-05 00:12:22 +0000130 else if (LangOpts.AltiVec && (Flags & KEYALTIVEC)) AddResult = 2;
Peter Collingbournef315fa82011-02-14 01:42:53 +0000131 else if (LangOpts.OpenCL && (Flags & KEYOPENCL)) AddResult = 2;
Douglas Gregor3a43d8d2010-10-13 20:00:38 +0000132 else if (!LangOpts.CPlusPlus && (Flags & KEYNOCXX)) AddResult = 2;
Benjamin Kramerffbe9b92011-12-23 17:00:35 +0000133 else if (LangOpts.C11 && (Flags & KEYC11)) AddResult = 2;
Fariborz Jahanian00852e42011-12-19 21:06:15 +0000134 // We treat bridge casts as objective-C keywords so we can warn on them
135 // in non-arc mode.
136 else if (LangOpts.ObjC2 && (Flags & KEYARC)) AddResult = 2;
Richard Smith98d86b92011-10-11 19:57:52 +0000137 else if (LangOpts.CPlusPlus && (Flags & KEYCXX0X)) AddResult = 3;
138
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000139 // Don't add this keyword if disabled in this language.
140 if (AddResult == 0) return;
141
Richard Smith98d86b92011-10-11 19:57:52 +0000142 IdentifierInfo &Info =
143 Table.get(Keyword, AddResult == 3 ? tok::identifier : TokenCode);
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000144 Info.setIsExtensionToken(AddResult == 1);
Richard Smith98d86b92011-10-11 19:57:52 +0000145 Info.setIsCXX11CompatKeyword(AddResult == 3);
Reid Spencer5f016e22007-07-11 17:01:13 +0000146}
147
Reid Spencer5f016e22007-07-11 17:01:13 +0000148/// AddCXXOperatorKeyword - Register a C++ operator keyword alternative
149/// representations.
Chris Lattner5f9e2722011-07-23 10:55:15 +0000150static void AddCXXOperatorKeyword(StringRef Keyword,
Reid Spencer5f016e22007-07-11 17:01:13 +0000151 tok::TokenKind TokenCode,
152 IdentifierTable &Table) {
Argyrios Kyrtzidis646395b2010-08-11 22:55:12 +0000153 IdentifierInfo &Info = Table.get(Keyword, TokenCode);
Ted Kremenekc637e6b2007-10-23 22:18:37 +0000154 Info.setIsCPlusPlusOperatorKeyword();
Reid Spencer5f016e22007-07-11 17:01:13 +0000155}
156
Mike Stump1eb44332009-09-09 15:08:12 +0000157/// AddObjCKeyword - Register an Objective-C @keyword like "class" "selector" or
Reid Spencer5f016e22007-07-11 17:01:13 +0000158/// "property".
Chris Lattner5f9e2722011-07-23 10:55:15 +0000159static void AddObjCKeyword(StringRef Name,
Kovarththanan Rajaratnam50acf242010-03-12 11:27:37 +0000160 tok::ObjCKeywordKind ObjCID,
Reid Spencer5f016e22007-07-11 17:01:13 +0000161 IdentifierTable &Table) {
Kovarththanan Rajaratnam50acf242010-03-12 11:27:37 +0000162 Table.get(Name).setObjCKeywordID(ObjCID);
Reid Spencer5f016e22007-07-11 17:01:13 +0000163}
164
165/// AddKeywords - Add all keywords to the symbol table.
166///
167void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
Reid Spencer5f016e22007-07-11 17:01:13 +0000168 // Add keywords and tokens for the current language.
169#define KEYWORD(NAME, FLAGS) \
Chris Lattner5f9e2722011-07-23 10:55:15 +0000170 AddKeyword(StringRef(#NAME), tok::kw_ ## NAME, \
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000171 FLAGS, LangOpts, *this);
172#define ALIAS(NAME, TOK, FLAGS) \
Chris Lattner5f9e2722011-07-23 10:55:15 +0000173 AddKeyword(StringRef(NAME), tok::kw_ ## TOK, \
Eli Friedmaneb32fde2009-04-28 03:13:54 +0000174 FLAGS, LangOpts, *this);
Reid Spencer5f016e22007-07-11 17:01:13 +0000175#define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \
176 if (LangOpts.CXXOperatorNames) \
Chris Lattner5f9e2722011-07-23 10:55:15 +0000177 AddCXXOperatorKeyword(StringRef(#NAME), tok::ALIAS, *this);
Reid Spencer5f016e22007-07-11 17:01:13 +0000178#define OBJC1_AT_KEYWORD(NAME) \
179 if (LangOpts.ObjC1) \
Chris Lattner5f9e2722011-07-23 10:55:15 +0000180 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this);
Reid Spencer5f016e22007-07-11 17:01:13 +0000181#define OBJC2_AT_KEYWORD(NAME) \
182 if (LangOpts.ObjC2) \
Chris Lattner5f9e2722011-07-23 10:55:15 +0000183 AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this);
John McCalla5fc4722011-04-09 22:50:59 +0000184#define TESTING_KEYWORD(NAME, FLAGS)
Reid Spencer5f016e22007-07-11 17:01:13 +0000185#include "clang/Basic/TokenKinds.def"
John McCalla5fc4722011-04-09 22:50:59 +0000186
187 if (LangOpts.ParseUnknownAnytype)
188 AddKeyword("__unknown_anytype", tok::kw___unknown_anytype, KEYALL,
189 LangOpts, *this);
Reid Spencer5f016e22007-07-11 17:01:13 +0000190}
191
Chris Lattner387b98d2007-10-07 07:52:34 +0000192tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const {
193 // We use a perfect hash function here involving the length of the keyword,
194 // the first and third character. For preprocessor ID's there are no
195 // collisions (if there were, the switch below would complain about duplicate
196 // case values). Note that this depends on 'if' being null terminated.
Mike Stump1eb44332009-09-09 15:08:12 +0000197
Chris Lattner387b98d2007-10-07 07:52:34 +0000198#define HASH(LEN, FIRST, THIRD) \
199 (LEN << 5) + (((FIRST-'a') + (THIRD-'a')) & 31)
200#define CASE(LEN, FIRST, THIRD, NAME) \
201 case HASH(LEN, FIRST, THIRD): \
202 return memcmp(Name, #NAME, LEN) ? tok::pp_not_keyword : tok::pp_ ## NAME
Mike Stump1eb44332009-09-09 15:08:12 +0000203
Chris Lattner387b98d2007-10-07 07:52:34 +0000204 unsigned Len = getLength();
Chris Lattnera31f0302007-10-10 20:59:57 +0000205 if (Len < 2) return tok::pp_not_keyword;
Daniel Dunbar76b61cc2009-10-17 18:13:02 +0000206 const char *Name = getNameStart();
Chris Lattner387b98d2007-10-07 07:52:34 +0000207 switch (HASH(Len, Name[0], Name[2])) {
208 default: return tok::pp_not_keyword;
209 CASE( 2, 'i', '\0', if);
210 CASE( 4, 'e', 'i', elif);
211 CASE( 4, 'e', 's', else);
212 CASE( 4, 'l', 'n', line);
213 CASE( 4, 's', 'c', sccs);
214 CASE( 5, 'e', 'd', endif);
215 CASE( 5, 'e', 'r', error);
216 CASE( 5, 'i', 'e', ident);
217 CASE( 5, 'i', 'd', ifdef);
218 CASE( 5, 'u', 'd', undef);
219
220 CASE( 6, 'a', 's', assert);
221 CASE( 6, 'd', 'f', define);
222 CASE( 6, 'i', 'n', ifndef);
223 CASE( 6, 'i', 'p', import);
224 CASE( 6, 'p', 'a', pragma);
Douglas Gregor94ad28b2012-01-03 18:24:14 +0000225
Chris Lattner387b98d2007-10-07 07:52:34 +0000226 CASE( 7, 'd', 'f', defined);
227 CASE( 7, 'i', 'c', include);
228 CASE( 7, 'w', 'r', warning);
229
230 CASE( 8, 'u', 'a', unassert);
231 CASE(12, 'i', 'c', include_next);
Mike Stump1eb44332009-09-09 15:08:12 +0000232
Douglas Gregor1ac13c32012-01-03 19:48:16 +0000233 CASE(14, '_', 'p', __public_macro);
234
235 CASE(15, '_', 'p', __private_macro);
236
Chris Lattnerb8e240e2009-04-08 18:24:34 +0000237 CASE(16, '_', 'i', __include_macros);
Chris Lattner387b98d2007-10-07 07:52:34 +0000238#undef CASE
239#undef HASH
240 }
241}
Reid Spencer5f016e22007-07-11 17:01:13 +0000242
243//===----------------------------------------------------------------------===//
244// Stats Implementation
245//===----------------------------------------------------------------------===//
246
247/// PrintStats - Print statistics about how well the identifier table is doing
248/// at hashing identifiers.
249void IdentifierTable::PrintStats() const {
250 unsigned NumBuckets = HashTable.getNumBuckets();
251 unsigned NumIdentifiers = HashTable.getNumItems();
252 unsigned NumEmptyBuckets = NumBuckets-NumIdentifiers;
253 unsigned AverageIdentifierSize = 0;
254 unsigned MaxIdentifierLength = 0;
Mike Stump1eb44332009-09-09 15:08:12 +0000255
Reid Spencer5f016e22007-07-11 17:01:13 +0000256 // TODO: Figure out maximum times an identifier had to probe for -stats.
Ted Kremenekea9c26b2009-01-20 23:28:34 +0000257 for (llvm::StringMap<IdentifierInfo*, llvm::BumpPtrAllocator>::const_iterator
Reid Spencer5f016e22007-07-11 17:01:13 +0000258 I = HashTable.begin(), E = HashTable.end(); I != E; ++I) {
259 unsigned IdLen = I->getKeyLength();
260 AverageIdentifierSize += IdLen;
261 if (MaxIdentifierLength < IdLen)
262 MaxIdentifierLength = IdLen;
263 }
Mike Stump1eb44332009-09-09 15:08:12 +0000264
Reid Spencer5f016e22007-07-11 17:01:13 +0000265 fprintf(stderr, "\n*** Identifier Table Stats:\n");
266 fprintf(stderr, "# Identifiers: %d\n", NumIdentifiers);
267 fprintf(stderr, "# Empty Buckets: %d\n", NumEmptyBuckets);
268 fprintf(stderr, "Hash density (#identifiers per bucket): %f\n",
269 NumIdentifiers/(double)NumBuckets);
270 fprintf(stderr, "Ave identifier length: %f\n",
271 (AverageIdentifierSize/(double)NumIdentifiers));
272 fprintf(stderr, "Max identifier length: %d\n", MaxIdentifierLength);
Mike Stump1eb44332009-09-09 15:08:12 +0000273
Reid Spencer5f016e22007-07-11 17:01:13 +0000274 // Compute statistics about the memory allocated for identifiers.
275 HashTable.getAllocator().PrintStats();
276}
Steve Naroff68d331a2007-09-27 14:38:14 +0000277
Steve Naroff29238a02007-10-05 18:42:47 +0000278//===----------------------------------------------------------------------===//
279// SelectorTable Implementation
280//===----------------------------------------------------------------------===//
281
Chris Lattner85994262007-10-05 20:15:24 +0000282unsigned llvm::DenseMapInfo<clang::Selector>::getHashValue(clang::Selector S) {
283 return DenseMapInfo<void*>::getHashValue(S.getAsOpaquePtr());
284}
285
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000286namespace clang {
Steve Naroff29238a02007-10-05 18:42:47 +0000287/// MultiKeywordSelector - One of these variable length records is kept for each
288/// selector containing more than one keyword. We use a folding set
Mike Stump1eb44332009-09-09 15:08:12 +0000289/// to unique aggregate names (keyword selectors in ObjC parlance). Access to
Steve Naroff29238a02007-10-05 18:42:47 +0000290/// this class is provided strictly through Selector.
Mike Stump1eb44332009-09-09 15:08:12 +0000291class MultiKeywordSelector
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000292 : public DeclarationNameExtra, public llvm::FoldingSetNode {
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000293 MultiKeywordSelector(unsigned nKeys) {
294 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys;
295 }
Mike Stump1eb44332009-09-09 15:08:12 +0000296public:
Steve Naroff29238a02007-10-05 18:42:47 +0000297 // Constructor for keyword selectors.
298 MultiKeywordSelector(unsigned nKeys, IdentifierInfo **IIV) {
299 assert((nKeys > 1) && "not a multi-keyword selector");
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000300 ExtraKindOrNumArgs = NUM_EXTRA_KINDS + nKeys;
Mike Stump1eb44332009-09-09 15:08:12 +0000301
Steve Naroff29238a02007-10-05 18:42:47 +0000302 // Fill in the trailing keyword array.
303 IdentifierInfo **KeyInfo = reinterpret_cast<IdentifierInfo **>(this+1);
304 for (unsigned i = 0; i != nKeys; ++i)
305 KeyInfo[i] = IIV[i];
Mike Stump1eb44332009-09-09 15:08:12 +0000306 }
307
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000308 // getName - Derive the full selector name and return it.
309 std::string getName() const;
Mike Stump1eb44332009-09-09 15:08:12 +0000310
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000311 unsigned getNumArgs() const { return ExtraKindOrNumArgs - NUM_EXTRA_KINDS; }
Mike Stump1eb44332009-09-09 15:08:12 +0000312
Steve Naroff29238a02007-10-05 18:42:47 +0000313 typedef IdentifierInfo *const *keyword_iterator;
314 keyword_iterator keyword_begin() const {
315 return reinterpret_cast<keyword_iterator>(this+1);
316 }
Mike Stump1eb44332009-09-09 15:08:12 +0000317 keyword_iterator keyword_end() const {
318 return keyword_begin()+getNumArgs();
Steve Naroff29238a02007-10-05 18:42:47 +0000319 }
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000320 IdentifierInfo *getIdentifierInfoForSlot(unsigned i) const {
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000321 assert(i < getNumArgs() && "getIdentifierInfoForSlot(): illegal index");
Steve Naroff29238a02007-10-05 18:42:47 +0000322 return keyword_begin()[i];
323 }
Mike Stump1eb44332009-09-09 15:08:12 +0000324 static void Profile(llvm::FoldingSetNodeID &ID,
Steve Naroff29238a02007-10-05 18:42:47 +0000325 keyword_iterator ArgTys, unsigned NumArgs) {
326 ID.AddInteger(NumArgs);
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000327 for (unsigned i = 0; i != NumArgs; ++i)
328 ID.AddPointer(ArgTys[i]);
Steve Naroff29238a02007-10-05 18:42:47 +0000329 }
330 void Profile(llvm::FoldingSetNodeID &ID) {
Douglas Gregor2e1cd422008-11-17 14:58:09 +0000331 Profile(ID, keyword_begin(), getNumArgs());
Steve Naroff29238a02007-10-05 18:42:47 +0000332 }
333};
Chris Lattner85994262007-10-05 20:15:24 +0000334} // end namespace clang.
Steve Naroff29238a02007-10-05 18:42:47 +0000335
336unsigned Selector::getNumArgs() const {
337 unsigned IIF = getIdentifierInfoFlag();
Douglas Gregor51603be2012-05-04 18:24:37 +0000338 if (IIF <= ZeroArg)
Steve Naroff29238a02007-10-05 18:42:47 +0000339 return 0;
340 if (IIF == OneArg)
341 return 1;
Douglas Gregor51603be2012-05-04 18:24:37 +0000342 // We point to a MultiKeywordSelector.
343 MultiKeywordSelector *SI = getMultiKeywordSelector();
Mike Stump1eb44332009-09-09 15:08:12 +0000344 return SI->getNumArgs();
Steve Naroff29238a02007-10-05 18:42:47 +0000345}
346
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000347IdentifierInfo *Selector::getIdentifierInfoForSlot(unsigned argIndex) const {
Douglas Gregor51603be2012-05-04 18:24:37 +0000348 if (getIdentifierInfoFlag() < MultiArg) {
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000349 assert(argIndex == 0 && "illegal keyword index");
Douglas Gregor405bad02009-04-26 22:20:50 +0000350 return getAsIdentifierInfo();
Steve Naroff29238a02007-10-05 18:42:47 +0000351 }
Douglas Gregor51603be2012-05-04 18:24:37 +0000352 // We point to a MultiKeywordSelector.
353 MultiKeywordSelector *SI = getMultiKeywordSelector();
Steve Naroff29238a02007-10-05 18:42:47 +0000354 return SI->getIdentifierInfoForSlot(argIndex);
355}
356
Chris Lattner5f9e2722011-07-23 10:55:15 +0000357StringRef Selector::getNameForSlot(unsigned int argIndex) const {
Douglas Gregor813d8342011-02-18 22:29:55 +0000358 IdentifierInfo *II = getIdentifierInfoForSlot(argIndex);
Chris Lattner5f9e2722011-07-23 10:55:15 +0000359 return II? II->getName() : StringRef();
Douglas Gregor813d8342011-02-18 22:29:55 +0000360}
361
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000362std::string MultiKeywordSelector::getName() const {
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000363 SmallString<256> Str;
Daniel Dunbar76b61cc2009-10-17 18:13:02 +0000364 llvm::raw_svector_ostream OS(Str);
Chris Lattnerf836e3f2007-10-07 01:33:16 +0000365 for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) {
366 if (*I)
Daniel Dunbar01eb9b92009-10-18 21:17:35 +0000367 OS << (*I)->getName();
Daniel Dunbar76b61cc2009-10-17 18:13:02 +0000368 OS << ':';
Steve Naroff29238a02007-10-05 18:42:47 +0000369 }
Mike Stump1eb44332009-09-09 15:08:12 +0000370
Daniel Dunbar76b61cc2009-10-17 18:13:02 +0000371 return OS.str();
Steve Naroff29238a02007-10-05 18:42:47 +0000372}
373
Chris Lattner077bf5e2008-11-24 03:33:13 +0000374std::string Selector::getAsString() const {
Douglas Gregor405bad02009-04-26 22:20:50 +0000375 if (InfoPtr == 0)
376 return "<null selector>";
377
Douglas Gregor51603be2012-05-04 18:24:37 +0000378 if (getIdentifierInfoFlag() < MultiArg) {
Ted Kremenekf5ed3962009-03-06 23:36:28 +0000379 IdentifierInfo *II = getAsIdentifierInfo();
Mike Stump1eb44332009-09-09 15:08:12 +0000380
Ted Kremenek150ec292009-03-07 01:22:02 +0000381 // If the number of arguments is 0 then II is guaranteed to not be null.
Ted Kremenekf5ed3962009-03-06 23:36:28 +0000382 if (getNumArgs() == 0)
Daniel Dunbar01eb9b92009-10-18 21:17:35 +0000383 return II->getName();
Ted Kremenekf5ed3962009-03-06 23:36:28 +0000384
Daniel Dunbar76b61cc2009-10-17 18:13:02 +0000385 if (!II)
386 return ":";
387
Daniel Dunbar01eb9b92009-10-18 21:17:35 +0000388 return II->getName().str() + ":";
Steve Naroff29238a02007-10-05 18:42:47 +0000389 }
Mike Stump1eb44332009-09-09 15:08:12 +0000390
Douglas Gregor51603be2012-05-04 18:24:37 +0000391 // We have a multiple keyword selector.
392 return getMultiKeywordSelector()->getName();
Steve Naroff29238a02007-10-05 18:42:47 +0000393}
394
John McCall85f3d762011-03-02 01:50:55 +0000395/// Interpreting the given string using the normal CamelCase
396/// conventions, determine whether the given string starts with the
397/// given "word", which is assumed to end in a lowercase letter.
Chris Lattner5f9e2722011-07-23 10:55:15 +0000398static bool startsWithWord(StringRef name, StringRef word) {
John McCall85f3d762011-03-02 01:50:55 +0000399 if (name.size() < word.size()) return false;
400 return ((name.size() == word.size() ||
401 !islower(name[word.size()]))
402 && name.startswith(word));
403}
404
405ObjCMethodFamily Selector::getMethodFamilyImpl(Selector sel) {
406 IdentifierInfo *first = sel.getIdentifierInfoForSlot(0);
407 if (!first) return OMF_None;
408
Chris Lattner5f9e2722011-07-23 10:55:15 +0000409 StringRef name = first->getName();
John McCall85f3d762011-03-02 01:50:55 +0000410 if (sel.isUnarySelector()) {
411 if (name == "autorelease") return OMF_autorelease;
412 if (name == "dealloc") return OMF_dealloc;
Nico Weber80cb6e62011-08-28 22:35:17 +0000413 if (name == "finalize") return OMF_finalize;
John McCall85f3d762011-03-02 01:50:55 +0000414 if (name == "release") return OMF_release;
415 if (name == "retain") return OMF_retain;
416 if (name == "retainCount") return OMF_retainCount;
Douglas Gregor926df6c2011-06-11 01:09:30 +0000417 if (name == "self") return OMF_self;
John McCall85f3d762011-03-02 01:50:55 +0000418 }
Fariborz Jahanian9670e172011-07-05 22:38:59 +0000419
420 if (name == "performSelector") return OMF_performSelector;
John McCall85f3d762011-03-02 01:50:55 +0000421
422 // The other method families may begin with a prefix of underscores.
423 while (!name.empty() && name.front() == '_')
424 name = name.substr(1);
425
426 if (name.empty()) return OMF_None;
427 switch (name.front()) {
428 case 'a':
429 if (startsWithWord(name, "alloc")) return OMF_alloc;
430 break;
431 case 'c':
432 if (startsWithWord(name, "copy")) return OMF_copy;
433 break;
434 case 'i':
435 if (startsWithWord(name, "init")) return OMF_init;
436 break;
437 case 'm':
438 if (startsWithWord(name, "mutableCopy")) return OMF_mutableCopy;
439 break;
440 case 'n':
441 if (startsWithWord(name, "new")) return OMF_new;
442 break;
443 default:
444 break;
445 }
446
447 return OMF_None;
448}
Steve Naroff29238a02007-10-05 18:42:47 +0000449
Chris Lattner5f7d2282009-03-04 05:35:38 +0000450namespace {
451 struct SelectorTableImpl {
452 llvm::FoldingSet<MultiKeywordSelector> Table;
453 llvm::BumpPtrAllocator Allocator;
454 };
455} // end anonymous namespace.
456
457static SelectorTableImpl &getSelectorTableImpl(void *P) {
458 return *static_cast<SelectorTableImpl*>(P);
459}
460
Benjamin Kramer8fe83e12012-02-04 13:45:25 +0000461/*static*/ Selector
462SelectorTable::constructSetterName(IdentifierTable &Idents,
463 SelectorTable &SelTable,
464 const IdentifierInfo *Name) {
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000465 SmallString<100> SelectorName;
Benjamin Kramer8fe83e12012-02-04 13:45:25 +0000466 SelectorName = "set";
467 SelectorName += Name->getName();
468 SelectorName[3] = toupper(SelectorName[3]);
469 IdentifierInfo *SetterName = &Idents.get(SelectorName);
470 return SelTable.getUnarySelector(SetterName);
471}
472
Ted Kremenek97f55d62011-04-18 22:47:04 +0000473size_t SelectorTable::getTotalMemory() const {
474 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl);
475 return SelTabImpl.Allocator.getTotalMemory();
476}
Chris Lattner5f7d2282009-03-04 05:35:38 +0000477
Chris Lattnerff384912007-10-07 02:00:24 +0000478Selector SelectorTable::getSelector(unsigned nKeys, IdentifierInfo **IIV) {
479 if (nKeys < 2)
480 return Selector(IIV[0], nKeys);
Mike Stump1eb44332009-09-09 15:08:12 +0000481
Chris Lattner5f7d2282009-03-04 05:35:38 +0000482 SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl);
Mike Stump1eb44332009-09-09 15:08:12 +0000483
Steve Naroff29238a02007-10-05 18:42:47 +0000484 // Unique selector, to guarantee there is one per name.
485 llvm::FoldingSetNodeID ID;
486 MultiKeywordSelector::Profile(ID, IIV, nKeys);
487
488 void *InsertPos = 0;
Chris Lattner5f7d2282009-03-04 05:35:38 +0000489 if (MultiKeywordSelector *SI =
490 SelTabImpl.Table.FindNodeOrInsertPos(ID, InsertPos))
Steve Naroff29238a02007-10-05 18:42:47 +0000491 return Selector(SI);
Mike Stump1eb44332009-09-09 15:08:12 +0000492
Steve Naroff29238a02007-10-05 18:42:47 +0000493 // MultiKeywordSelector objects are not allocated with new because they have a
494 // variable size array (for parameter types) at the end of them.
Chris Lattner5f7d2282009-03-04 05:35:38 +0000495 unsigned Size = sizeof(MultiKeywordSelector) + nKeys*sizeof(IdentifierInfo *);
496 MultiKeywordSelector *SI =
Mike Stump1eb44332009-09-09 15:08:12 +0000497 (MultiKeywordSelector*)SelTabImpl.Allocator.Allocate(Size,
Chris Lattner32488542010-10-30 05:14:06 +0000498 llvm::alignOf<MultiKeywordSelector>());
Steve Naroff29238a02007-10-05 18:42:47 +0000499 new (SI) MultiKeywordSelector(nKeys, IIV);
Chris Lattner5f7d2282009-03-04 05:35:38 +0000500 SelTabImpl.Table.InsertNode(SI, InsertPos);
Steve Naroff29238a02007-10-05 18:42:47 +0000501 return Selector(SI);
502}
503
Steve Naroff29238a02007-10-05 18:42:47 +0000504SelectorTable::SelectorTable() {
Chris Lattner5f7d2282009-03-04 05:35:38 +0000505 Impl = new SelectorTableImpl();
Steve Naroff29238a02007-10-05 18:42:47 +0000506}
507
508SelectorTable::~SelectorTable() {
Chris Lattner5f7d2282009-03-04 05:35:38 +0000509 delete &getSelectorTableImpl(Impl);
Steve Naroff29238a02007-10-05 18:42:47 +0000510}
511
Douglas Gregorca1bdd72009-11-04 00:56:37 +0000512const char *clang::getOperatorSpelling(OverloadedOperatorKind Operator) {
513 switch (Operator) {
514 case OO_None:
515 case NUM_OVERLOADED_OPERATORS:
516 return 0;
Kovarththanan Rajaratnam50acf242010-03-12 11:27:37 +0000517
Douglas Gregorca1bdd72009-11-04 00:56:37 +0000518#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
519 case OO_##Name: return Spelling;
520#include "clang/Basic/OperatorKinds.def"
521 }
Kovarththanan Rajaratnam50acf242010-03-12 11:27:37 +0000522
David Blaikie7530c032012-01-17 06:56:22 +0000523 llvm_unreachable("Invalid OverloadedOperatorKind!");
Douglas Gregorca1bdd72009-11-04 00:56:37 +0000524}