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Diffstat (limited to 'clang/lib/Basic/IdentifierTable.cpp')
| -rw-r--r-- | clang/lib/Basic/IdentifierTable.cpp | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/clang/lib/Basic/IdentifierTable.cpp b/clang/lib/Basic/IdentifierTable.cpp new file mode 100644 index 000000000000..4aebea19924f --- /dev/null +++ b/clang/lib/Basic/IdentifierTable.cpp @@ -0,0 +1,712 @@ +//===- IdentifierTable.cpp - Hash table for identifier lookup -------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file implements the IdentifierInfo, IdentifierVisitor, and +// IdentifierTable interfaces. +// +//===----------------------------------------------------------------------===// + +#include "clang/Basic/IdentifierTable.h" +#include "clang/Basic/CharInfo.h" +#include "clang/Basic/LangOptions.h" +#include "clang/Basic/OperatorKinds.h" +#include "clang/Basic/Specifiers.h" +#include "clang/Basic/TokenKinds.h" +#include "llvm/ADT/DenseMapInfo.h" +#include "llvm/ADT/FoldingSet.h" +#include "llvm/ADT/SmallString.h" +#include "llvm/ADT/StringMap.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/Support/Allocator.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" +#include <cassert> +#include <cstdio> +#include <cstring> +#include <string> + +using namespace clang; + +//===----------------------------------------------------------------------===// +// IdentifierTable Implementation +//===----------------------------------------------------------------------===// + +IdentifierIterator::~IdentifierIterator() = default; + +IdentifierInfoLookup::~IdentifierInfoLookup() = default; + +namespace { + +/// A simple identifier lookup iterator that represents an +/// empty sequence of identifiers. +class EmptyLookupIterator : public IdentifierIterator +{ +public: + StringRef Next() override { return StringRef(); } +}; + +} // namespace + +IdentifierIterator *IdentifierInfoLookup::getIdentifiers() { + return new EmptyLookupIterator(); +} + +IdentifierTable::IdentifierTable(IdentifierInfoLookup *ExternalLookup) + : HashTable(8192), // Start with space for 8K identifiers. + ExternalLookup(ExternalLookup) {} + +IdentifierTable::IdentifierTable(const LangOptions &LangOpts, + IdentifierInfoLookup *ExternalLookup) + : IdentifierTable(ExternalLookup) { + // Populate the identifier table with info about keywords for the current + // language. + AddKeywords(LangOpts); +} + +//===----------------------------------------------------------------------===// +// Language Keyword Implementation +//===----------------------------------------------------------------------===// + +// Constants for TokenKinds.def +namespace { + + enum { + KEYC99 = 0x1, + KEYCXX = 0x2, + KEYCXX11 = 0x4, + KEYGNU = 0x8, + KEYMS = 0x10, + BOOLSUPPORT = 0x20, + KEYALTIVEC = 0x40, + KEYNOCXX = 0x80, + KEYBORLAND = 0x100, + KEYOPENCLC = 0x200, + KEYC11 = 0x400, + KEYNOMS18 = 0x800, + KEYNOOPENCL = 0x1000, + WCHARSUPPORT = 0x2000, + HALFSUPPORT = 0x4000, + CHAR8SUPPORT = 0x8000, + KEYCONCEPTS = 0x10000, + KEYOBJC = 0x20000, + KEYZVECTOR = 0x40000, + KEYCOROUTINES = 0x80000, + KEYMODULES = 0x100000, + KEYCXX2A = 0x200000, + KEYOPENCLCXX = 0x400000, + KEYMSCOMPAT = 0x800000, + KEYALLCXX = KEYCXX | KEYCXX11 | KEYCXX2A, + KEYALL = (0xffffff & ~KEYNOMS18 & + ~KEYNOOPENCL) // KEYNOMS18 and KEYNOOPENCL are used to exclude. + }; + + /// How a keyword is treated in the selected standard. + enum KeywordStatus { + KS_Disabled, // Disabled + KS_Extension, // Is an extension + KS_Enabled, // Enabled + KS_Future // Is a keyword in future standard + }; + +} // namespace + +/// Translates flags as specified in TokenKinds.def into keyword status +/// in the given language standard. +static KeywordStatus getKeywordStatus(const LangOptions &LangOpts, + unsigned Flags) { + if (Flags == KEYALL) return KS_Enabled; + if (LangOpts.CPlusPlus && (Flags & KEYCXX)) return KS_Enabled; + if (LangOpts.CPlusPlus11 && (Flags & KEYCXX11)) return KS_Enabled; + if (LangOpts.CPlusPlus2a && (Flags & KEYCXX2A)) return KS_Enabled; + if (LangOpts.C99 && (Flags & KEYC99)) return KS_Enabled; + if (LangOpts.GNUKeywords && (Flags & KEYGNU)) return KS_Extension; + if (LangOpts.MicrosoftExt && (Flags & KEYMS)) return KS_Extension; + if (LangOpts.MSVCCompat && (Flags & KEYMSCOMPAT)) return KS_Enabled; + if (LangOpts.Borland && (Flags & KEYBORLAND)) return KS_Extension; + if (LangOpts.Bool && (Flags & BOOLSUPPORT)) return KS_Enabled; + if (LangOpts.Half && (Flags & HALFSUPPORT)) return KS_Enabled; + if (LangOpts.WChar && (Flags & WCHARSUPPORT)) return KS_Enabled; + if (LangOpts.Char8 && (Flags & CHAR8SUPPORT)) return KS_Enabled; + if (LangOpts.AltiVec && (Flags & KEYALTIVEC)) return KS_Enabled; + if (LangOpts.ZVector && (Flags & KEYZVECTOR)) return KS_Enabled; + if (LangOpts.OpenCL && !LangOpts.OpenCLCPlusPlus && (Flags & KEYOPENCLC)) + return KS_Enabled; + if (LangOpts.OpenCLCPlusPlus && (Flags & KEYOPENCLCXX)) return KS_Enabled; + if (!LangOpts.CPlusPlus && (Flags & KEYNOCXX)) return KS_Enabled; + if (LangOpts.C11 && (Flags & KEYC11)) return KS_Enabled; + // We treat bridge casts as objective-C keywords so we can warn on them + // in non-arc mode. + if (LangOpts.ObjC && (Flags & KEYOBJC)) return KS_Enabled; + if (LangOpts.ConceptsTS && (Flags & KEYCONCEPTS)) return KS_Enabled; + if (LangOpts.Coroutines && (Flags & KEYCOROUTINES)) return KS_Enabled; + if (LangOpts.ModulesTS && (Flags & KEYMODULES)) return KS_Enabled; + if (LangOpts.CPlusPlus && (Flags & KEYALLCXX)) return KS_Future; + return KS_Disabled; +} + +/// AddKeyword - This method is used to associate a token ID with specific +/// identifiers because they are language keywords. This causes the lexer to +/// automatically map matching identifiers to specialized token codes. +static void AddKeyword(StringRef Keyword, + tok::TokenKind TokenCode, unsigned Flags, + const LangOptions &LangOpts, IdentifierTable &Table) { + KeywordStatus AddResult = getKeywordStatus(LangOpts, Flags); + + // Don't add this keyword under MSVCCompat. + if (LangOpts.MSVCCompat && (Flags & KEYNOMS18) && + !LangOpts.isCompatibleWithMSVC(LangOptions::MSVC2015)) + return; + + // Don't add this keyword under OpenCL. + if (LangOpts.OpenCL && (Flags & KEYNOOPENCL)) + return; + + // Don't add this keyword if disabled in this language. + if (AddResult == KS_Disabled) return; + + IdentifierInfo &Info = + Table.get(Keyword, AddResult == KS_Future ? tok::identifier : TokenCode); + Info.setIsExtensionToken(AddResult == KS_Extension); + Info.setIsFutureCompatKeyword(AddResult == KS_Future); +} + +/// AddCXXOperatorKeyword - Register a C++ operator keyword alternative +/// representations. +static void AddCXXOperatorKeyword(StringRef Keyword, + tok::TokenKind TokenCode, + IdentifierTable &Table) { + IdentifierInfo &Info = Table.get(Keyword, TokenCode); + Info.setIsCPlusPlusOperatorKeyword(); +} + +/// AddObjCKeyword - Register an Objective-C \@keyword like "class" "selector" +/// or "property". +static void AddObjCKeyword(StringRef Name, + tok::ObjCKeywordKind ObjCID, + IdentifierTable &Table) { + Table.get(Name).setObjCKeywordID(ObjCID); +} + +/// AddKeywords - Add all keywords to the symbol table. +/// +void IdentifierTable::AddKeywords(const LangOptions &LangOpts) { + // Add keywords and tokens for the current language. +#define KEYWORD(NAME, FLAGS) \ + AddKeyword(StringRef(#NAME), tok::kw_ ## NAME, \ + FLAGS, LangOpts, *this); +#define ALIAS(NAME, TOK, FLAGS) \ + AddKeyword(StringRef(NAME), tok::kw_ ## TOK, \ + FLAGS, LangOpts, *this); +#define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \ + if (LangOpts.CXXOperatorNames) \ + AddCXXOperatorKeyword(StringRef(#NAME), tok::ALIAS, *this); +#define OBJC_AT_KEYWORD(NAME) \ + if (LangOpts.ObjC) \ + AddObjCKeyword(StringRef(#NAME), tok::objc_##NAME, *this); +#define TESTING_KEYWORD(NAME, FLAGS) +#include "clang/Basic/TokenKinds.def" + + if (LangOpts.ParseUnknownAnytype) + AddKeyword("__unknown_anytype", tok::kw___unknown_anytype, KEYALL, + LangOpts, *this); + + if (LangOpts.DeclSpecKeyword) + AddKeyword("__declspec", tok::kw___declspec, KEYALL, LangOpts, *this); + + // Add the 'import' contextual keyword. + get("import").setModulesImport(true); +} + +/// Checks if the specified token kind represents a keyword in the +/// specified language. +/// \returns Status of the keyword in the language. +static KeywordStatus getTokenKwStatus(const LangOptions &LangOpts, + tok::TokenKind K) { + switch (K) { +#define KEYWORD(NAME, FLAGS) \ + case tok::kw_##NAME: return getKeywordStatus(LangOpts, FLAGS); +#include "clang/Basic/TokenKinds.def" + default: return KS_Disabled; + } +} + +/// Returns true if the identifier represents a keyword in the +/// specified language. +bool IdentifierInfo::isKeyword(const LangOptions &LangOpts) const { + switch (getTokenKwStatus(LangOpts, getTokenID())) { + case KS_Enabled: + case KS_Extension: + return true; + default: + return false; + } +} + +/// Returns true if the identifier represents a C++ keyword in the +/// specified language. +bool IdentifierInfo::isCPlusPlusKeyword(const LangOptions &LangOpts) const { + if (!LangOpts.CPlusPlus || !isKeyword(LangOpts)) + return false; + // This is a C++ keyword if this identifier is not a keyword when checked + // using LangOptions without C++ support. + LangOptions LangOptsNoCPP = LangOpts; + LangOptsNoCPP.CPlusPlus = false; + LangOptsNoCPP.CPlusPlus11 = false; + LangOptsNoCPP.CPlusPlus2a = false; + return !isKeyword(LangOptsNoCPP); +} + +tok::PPKeywordKind IdentifierInfo::getPPKeywordID() const { + // We use a perfect hash function here involving the length of the keyword, + // the first and third character. For preprocessor ID's there are no + // collisions (if there were, the switch below would complain about duplicate + // case values). Note that this depends on 'if' being null terminated. + +#define HASH(LEN, FIRST, THIRD) \ + (LEN << 5) + (((FIRST-'a') + (THIRD-'a')) & 31) +#define CASE(LEN, FIRST, THIRD, NAME) \ + case HASH(LEN, FIRST, THIRD): \ + return memcmp(Name, #NAME, LEN) ? tok::pp_not_keyword : tok::pp_ ## NAME + + unsigned Len = getLength(); + if (Len < 2) return tok::pp_not_keyword; + const char *Name = getNameStart(); + switch (HASH(Len, Name[0], Name[2])) { + default: return tok::pp_not_keyword; + CASE( 2, 'i', '\0', if); + CASE( 4, 'e', 'i', elif); + CASE( 4, 'e', 's', else); + CASE( 4, 'l', 'n', line); + CASE( 4, 's', 'c', sccs); + CASE( 5, 'e', 'd', endif); + CASE( 5, 'e', 'r', error); + CASE( 5, 'i', 'e', ident); + CASE( 5, 'i', 'd', ifdef); + CASE( 5, 'u', 'd', undef); + + CASE( 6, 'a', 's', assert); + CASE( 6, 'd', 'f', define); + CASE( 6, 'i', 'n', ifndef); + CASE( 6, 'i', 'p', import); + CASE( 6, 'p', 'a', pragma); + + CASE( 7, 'd', 'f', defined); + CASE( 7, 'i', 'c', include); + CASE( 7, 'w', 'r', warning); + + CASE( 8, 'u', 'a', unassert); + CASE(12, 'i', 'c', include_next); + + CASE(14, '_', 'p', __public_macro); + + CASE(15, '_', 'p', __private_macro); + + CASE(16, '_', 'i', __include_macros); +#undef CASE +#undef HASH + } +} + +//===----------------------------------------------------------------------===// +// Stats Implementation +//===----------------------------------------------------------------------===// + +/// PrintStats - Print statistics about how well the identifier table is doing +/// at hashing identifiers. +void IdentifierTable::PrintStats() const { + unsigned NumBuckets = HashTable.getNumBuckets(); + unsigned NumIdentifiers = HashTable.getNumItems(); + unsigned NumEmptyBuckets = NumBuckets-NumIdentifiers; + unsigned AverageIdentifierSize = 0; + unsigned MaxIdentifierLength = 0; + + // TODO: Figure out maximum times an identifier had to probe for -stats. + for (llvm::StringMap<IdentifierInfo*, llvm::BumpPtrAllocator>::const_iterator + I = HashTable.begin(), E = HashTable.end(); I != E; ++I) { + unsigned IdLen = I->getKeyLength(); + AverageIdentifierSize += IdLen; + if (MaxIdentifierLength < IdLen) + MaxIdentifierLength = IdLen; + } + + fprintf(stderr, "\n*** Identifier Table Stats:\n"); + fprintf(stderr, "# Identifiers: %d\n", NumIdentifiers); + fprintf(stderr, "# Empty Buckets: %d\n", NumEmptyBuckets); + fprintf(stderr, "Hash density (#identifiers per bucket): %f\n", + NumIdentifiers/(double)NumBuckets); + fprintf(stderr, "Ave identifier length: %f\n", + (AverageIdentifierSize/(double)NumIdentifiers)); + fprintf(stderr, "Max identifier length: %d\n", MaxIdentifierLength); + + // Compute statistics about the memory allocated for identifiers. + HashTable.getAllocator().PrintStats(); +} + +//===----------------------------------------------------------------------===// +// SelectorTable Implementation +//===----------------------------------------------------------------------===// + +unsigned llvm::DenseMapInfo<clang::Selector>::getHashValue(clang::Selector S) { + return DenseMapInfo<void*>::getHashValue(S.getAsOpaquePtr()); +} + +namespace clang { + +/// One of these variable length records is kept for each +/// selector containing more than one keyword. We use a folding set +/// to unique aggregate names (keyword selectors in ObjC parlance). Access to +/// this class is provided strictly through Selector. +class alignas(IdentifierInfoAlignment) MultiKeywordSelector + : public detail::DeclarationNameExtra, + public llvm::FoldingSetNode { + MultiKeywordSelector(unsigned nKeys) : DeclarationNameExtra(nKeys) {} + +public: + // Constructor for keyword selectors. + MultiKeywordSelector(unsigned nKeys, IdentifierInfo **IIV) + : DeclarationNameExtra(nKeys) { + assert((nKeys > 1) && "not a multi-keyword selector"); + + // Fill in the trailing keyword array. + IdentifierInfo **KeyInfo = reinterpret_cast<IdentifierInfo **>(this + 1); + for (unsigned i = 0; i != nKeys; ++i) + KeyInfo[i] = IIV[i]; + } + + // getName - Derive the full selector name and return it. + std::string getName() const; + + using DeclarationNameExtra::getNumArgs; + + using keyword_iterator = IdentifierInfo *const *; + + keyword_iterator keyword_begin() const { + return reinterpret_cast<keyword_iterator>(this + 1); + } + + keyword_iterator keyword_end() const { + return keyword_begin() + getNumArgs(); + } + + IdentifierInfo *getIdentifierInfoForSlot(unsigned i) const { + assert(i < getNumArgs() && "getIdentifierInfoForSlot(): illegal index"); + return keyword_begin()[i]; + } + + static void Profile(llvm::FoldingSetNodeID &ID, keyword_iterator ArgTys, + unsigned NumArgs) { + ID.AddInteger(NumArgs); + for (unsigned i = 0; i != NumArgs; ++i) + ID.AddPointer(ArgTys[i]); + } + + void Profile(llvm::FoldingSetNodeID &ID) { + Profile(ID, keyword_begin(), getNumArgs()); + } +}; + +} // namespace clang. + +bool Selector::isKeywordSelector(ArrayRef<StringRef> Names) const { + assert(!Names.empty() && "must have >= 1 selector slots"); + if (getNumArgs() != Names.size()) + return false; + for (unsigned I = 0, E = Names.size(); I != E; ++I) { + if (getNameForSlot(I) != Names[I]) + return false; + } + return true; +} + +bool Selector::isUnarySelector(StringRef Name) const { + return isUnarySelector() && getNameForSlot(0) == Name; +} + +unsigned Selector::getNumArgs() const { + unsigned IIF = getIdentifierInfoFlag(); + if (IIF <= ZeroArg) + return 0; + if (IIF == OneArg) + return 1; + // We point to a MultiKeywordSelector. + MultiKeywordSelector *SI = getMultiKeywordSelector(); + return SI->getNumArgs(); +} + +IdentifierInfo *Selector::getIdentifierInfoForSlot(unsigned argIndex) const { + if (getIdentifierInfoFlag() < MultiArg) { + assert(argIndex == 0 && "illegal keyword index"); + return getAsIdentifierInfo(); + } + + // We point to a MultiKeywordSelector. + MultiKeywordSelector *SI = getMultiKeywordSelector(); + return SI->getIdentifierInfoForSlot(argIndex); +} + +StringRef Selector::getNameForSlot(unsigned int argIndex) const { + IdentifierInfo *II = getIdentifierInfoForSlot(argIndex); + return II ? II->getName() : StringRef(); +} + +std::string MultiKeywordSelector::getName() const { + SmallString<256> Str; + llvm::raw_svector_ostream OS(Str); + for (keyword_iterator I = keyword_begin(), E = keyword_end(); I != E; ++I) { + if (*I) + OS << (*I)->getName(); + OS << ':'; + } + + return OS.str(); +} + +std::string Selector::getAsString() const { + if (InfoPtr == 0) + return "<null selector>"; + + if (getIdentifierInfoFlag() < MultiArg) { + IdentifierInfo *II = getAsIdentifierInfo(); + + if (getNumArgs() == 0) { + assert(II && "If the number of arguments is 0 then II is guaranteed to " + "not be null."); + return II->getName(); + } + + if (!II) + return ":"; + + return II->getName().str() + ":"; + } + + // We have a multiple keyword selector. + return getMultiKeywordSelector()->getName(); +} + +void Selector::print(llvm::raw_ostream &OS) const { + OS << getAsString(); +} + +LLVM_DUMP_METHOD void Selector::dump() const { print(llvm::errs()); } + +/// Interpreting the given string using the normal CamelCase +/// conventions, determine whether the given string starts with the +/// given "word", which is assumed to end in a lowercase letter. +static bool startsWithWord(StringRef name, StringRef word) { + if (name.size() < word.size()) return false; + return ((name.size() == word.size() || !isLowercase(name[word.size()])) && + name.startswith(word)); +} + +ObjCMethodFamily Selector::getMethodFamilyImpl(Selector sel) { + IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); + if (!first) return OMF_None; + + StringRef name = first->getName(); + if (sel.isUnarySelector()) { + if (name == "autorelease") return OMF_autorelease; + if (name == "dealloc") return OMF_dealloc; + if (name == "finalize") return OMF_finalize; + if (name == "release") return OMF_release; + if (name == "retain") return OMF_retain; + if (name == "retainCount") return OMF_retainCount; + if (name == "self") return OMF_self; + if (name == "initialize") return OMF_initialize; + } + + if (name == "performSelector" || name == "performSelectorInBackground" || + name == "performSelectorOnMainThread") + return OMF_performSelector; + + // The other method families may begin with a prefix of underscores. + while (!name.empty() && name.front() == '_') + name = name.substr(1); + + if (name.empty()) return OMF_None; + switch (name.front()) { + case 'a': + if (startsWithWord(name, "alloc")) return OMF_alloc; + break; + case 'c': + if (startsWithWord(name, "copy")) return OMF_copy; + break; + case 'i': + if (startsWithWord(name, "init")) return OMF_init; + break; + case 'm': + if (startsWithWord(name, "mutableCopy")) return OMF_mutableCopy; + break; + case 'n': + if (startsWithWord(name, "new")) return OMF_new; + break; + default: + break; + } + + return OMF_None; +} + +ObjCInstanceTypeFamily Selector::getInstTypeMethodFamily(Selector sel) { + IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); + if (!first) return OIT_None; + + StringRef name = first->getName(); + + if (name.empty()) return OIT_None; + switch (name.front()) { + case 'a': + if (startsWithWord(name, "array")) return OIT_Array; + break; + case 'd': + if (startsWithWord(name, "default")) return OIT_ReturnsSelf; + if (startsWithWord(name, "dictionary")) return OIT_Dictionary; + break; + case 's': + if (startsWithWord(name, "shared")) return OIT_ReturnsSelf; + if (startsWithWord(name, "standard")) return OIT_Singleton; + break; + case 'i': + if (startsWithWord(name, "init")) return OIT_Init; + break; + default: + break; + } + return OIT_None; +} + +ObjCStringFormatFamily Selector::getStringFormatFamilyImpl(Selector sel) { + IdentifierInfo *first = sel.getIdentifierInfoForSlot(0); + if (!first) return SFF_None; + + StringRef name = first->getName(); + + switch (name.front()) { + case 'a': + if (name == "appendFormat") return SFF_NSString; + break; + + case 'i': + if (name == "initWithFormat") return SFF_NSString; + break; + + case 'l': + if (name == "localizedStringWithFormat") return SFF_NSString; + break; + + case 's': + if (name == "stringByAppendingFormat" || + name == "stringWithFormat") return SFF_NSString; + break; + } + return SFF_None; +} + +namespace { + +struct SelectorTableImpl { + llvm::FoldingSet<MultiKeywordSelector> Table; + llvm::BumpPtrAllocator Allocator; +}; + +} // namespace + +static SelectorTableImpl &getSelectorTableImpl(void *P) { + return *static_cast<SelectorTableImpl*>(P); +} + +SmallString<64> +SelectorTable::constructSetterName(StringRef Name) { + SmallString<64> SetterName("set"); + SetterName += Name; + SetterName[3] = toUppercase(SetterName[3]); + return SetterName; +} + +Selector +SelectorTable::constructSetterSelector(IdentifierTable &Idents, + SelectorTable &SelTable, + const IdentifierInfo *Name) { + IdentifierInfo *SetterName = + &Idents.get(constructSetterName(Name->getName())); + return SelTable.getUnarySelector(SetterName); +} + +std::string SelectorTable::getPropertyNameFromSetterSelector(Selector Sel) { + StringRef Name = Sel.getNameForSlot(0); + assert(Name.startswith("set") && "invalid setter name"); + return (Twine(toLowercase(Name[3])) + Name.drop_front(4)).str(); +} + +size_t SelectorTable::getTotalMemory() const { + SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl); + return SelTabImpl.Allocator.getTotalMemory(); +} + +Selector SelectorTable::getSelector(unsigned nKeys, IdentifierInfo **IIV) { + if (nKeys < 2) + return Selector(IIV[0], nKeys); + + SelectorTableImpl &SelTabImpl = getSelectorTableImpl(Impl); + + // Unique selector, to guarantee there is one per name. + llvm::FoldingSetNodeID ID; + MultiKeywordSelector::Profile(ID, IIV, nKeys); + + void *InsertPos = nullptr; + if (MultiKeywordSelector *SI = + SelTabImpl.Table.FindNodeOrInsertPos(ID, InsertPos)) + return Selector(SI); + + // MultiKeywordSelector objects are not allocated with new because they have a + // variable size array (for parameter types) at the end of them. + unsigned Size = sizeof(MultiKeywordSelector) + nKeys*sizeof(IdentifierInfo *); + MultiKeywordSelector *SI = + (MultiKeywordSelector *)SelTabImpl.Allocator.Allocate( + Size, alignof(MultiKeywordSelector)); + new (SI) MultiKeywordSelector(nKeys, IIV); + SelTabImpl.Table.InsertNode(SI, InsertPos); + return Selector(SI); +} + +SelectorTable::SelectorTable() { + Impl = new SelectorTableImpl(); +} + +SelectorTable::~SelectorTable() { + delete &getSelectorTableImpl(Impl); +} + +const char *clang::getOperatorSpelling(OverloadedOperatorKind Operator) { + switch (Operator) { + case OO_None: + case NUM_OVERLOADED_OPERATORS: + return nullptr; + +#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ + case OO_##Name: return Spelling; +#include "clang/Basic/OperatorKinds.def" + } + + llvm_unreachable("Invalid OverloadedOperatorKind!"); +} + +StringRef clang::getNullabilitySpelling(NullabilityKind kind, + bool isContextSensitive) { + switch (kind) { + case NullabilityKind::NonNull: + return isContextSensitive ? "nonnull" : "_Nonnull"; + + case NullabilityKind::Nullable: + return isContextSensitive ? "nullable" : "_Nullable"; + + case NullabilityKind::Unspecified: + return isContextSensitive ? "null_unspecified" : "_Null_unspecified"; + } + llvm_unreachable("Unknown nullability kind."); +} |