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Diffstat (limited to 'clang/include/clang/Basic/IdentifierTable.h')
| -rw-r--r-- | clang/include/clang/Basic/IdentifierTable.h | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/clang/include/clang/Basic/IdentifierTable.h b/clang/include/clang/Basic/IdentifierTable.h new file mode 100644 index 0000000..cc0080b --- /dev/null +++ b/clang/include/clang/Basic/IdentifierTable.h @@ -0,0 +1,809 @@ +//===--- IdentifierTable.h - Hash table for identifier lookup ---*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines the IdentifierInfo, IdentifierTable, and Selector +// interfaces. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CLANG_BASIC_IDENTIFIERTABLE_H +#define LLVM_CLANG_BASIC_IDENTIFIERTABLE_H + +#include "clang/Basic/OperatorKinds.h" +#include "clang/Basic/TokenKinds.h" +#include "clang/Basic/LLVM.h" +#include "llvm/ADT/StringMap.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/ADT/OwningPtr.h" +#include "llvm/Support/PointerLikeTypeTraits.h" +#include <cassert> +#include <string> + +namespace llvm { + template <typename T> struct DenseMapInfo; +} + +namespace clang { + class LangOptions; + class IdentifierInfo; + class IdentifierTable; + class SourceLocation; + class MultiKeywordSelector; // private class used by Selector + class DeclarationName; // AST class that stores declaration names + + /// IdentifierLocPair - A simple pair of identifier info and location. + typedef std::pair<IdentifierInfo*, SourceLocation> IdentifierLocPair; + + +/// IdentifierInfo - One of these records is kept for each identifier that +/// is lexed. This contains information about whether the token was #define'd, +/// is a language keyword, or if it is a front-end token of some sort (e.g. a +/// variable or function name). The preprocessor keeps this information in a +/// set, and all tok::identifier tokens have a pointer to one of these. +class IdentifierInfo { + unsigned TokenID : 9; // Front-end token ID or tok::identifier. + // Objective-C keyword ('protocol' in '@protocol') or builtin (__builtin_inf). + // First NUM_OBJC_KEYWORDS values are for Objective-C, the remaining values + // are for builtins. + unsigned ObjCOrBuiltinID :11; + bool HasMacro : 1; // True if there is a #define for this. + bool IsExtension : 1; // True if identifier is a lang extension. + bool IsCXX11CompatKeyword : 1; // True if identifier is a keyword in C++11. + bool IsPoisoned : 1; // True if identifier is poisoned. + bool IsCPPOperatorKeyword : 1; // True if ident is a C++ operator keyword. + bool NeedsHandleIdentifier : 1; // See "RecomputeNeedsHandleIdentifier". + bool IsFromAST : 1; // True if identifier was loaded (at least + // partially) from an AST file. + bool ChangedAfterLoad : 1; // True if identifier has changed from the + // definition loaded from an AST file. + bool RevertedTokenID : 1; // True if RevertTokenIDToIdentifier was + // called. + bool OutOfDate : 1; // True if there may be additional + // information about this identifier + // stored externally. + bool IsModulesImport : 1; // True if this is the 'import' contextual + // keyword. + // 1 bit left in 32-bit word. + + void *FETokenInfo; // Managed by the language front-end. + llvm::StringMapEntry<IdentifierInfo*> *Entry; + + IdentifierInfo(const IdentifierInfo&); // NONCOPYABLE. + void operator=(const IdentifierInfo&); // NONASSIGNABLE. + + friend class IdentifierTable; + +public: + IdentifierInfo(); + + + /// isStr - Return true if this is the identifier for the specified string. + /// This is intended to be used for string literals only: II->isStr("foo"). + template <std::size_t StrLen> + bool isStr(const char (&Str)[StrLen]) const { + return getLength() == StrLen-1 && !memcmp(getNameStart(), Str, StrLen-1); + } + + /// getNameStart - Return the beginning of the actual string for this + /// identifier. The returned string is properly null terminated. + /// + const char *getNameStart() const { + if (Entry) return Entry->getKeyData(); + // FIXME: This is gross. It would be best not to embed specific details + // of the PTH file format here. + // The 'this' pointer really points to a + // std::pair<IdentifierInfo, const char*>, where internal pointer + // points to the external string data. + typedef std::pair<IdentifierInfo, const char*> actualtype; + return ((const actualtype*) this)->second; + } + + /// getLength - Efficiently return the length of this identifier info. + /// + unsigned getLength() const { + if (Entry) return Entry->getKeyLength(); + // FIXME: This is gross. It would be best not to embed specific details + // of the PTH file format here. + // The 'this' pointer really points to a + // std::pair<IdentifierInfo, const char*>, where internal pointer + // points to the external string data. + typedef std::pair<IdentifierInfo, const char*> actualtype; + const char* p = ((const actualtype*) this)->second - 2; + return (((unsigned) p[0]) | (((unsigned) p[1]) << 8)) - 1; + } + + /// getName - Return the actual identifier string. + StringRef getName() const { + return StringRef(getNameStart(), getLength()); + } + + /// hasMacroDefinition - Return true if this identifier is #defined to some + /// other value. + bool hasMacroDefinition() const { + return HasMacro; + } + void setHasMacroDefinition(bool Val) { + if (HasMacro == Val) return; + + HasMacro = Val; + if (Val) + NeedsHandleIdentifier = 1; + else + RecomputeNeedsHandleIdentifier(); + } + + /// getTokenID - If this is a source-language token (e.g. 'for'), this API + /// can be used to cause the lexer to map identifiers to source-language + /// tokens. + tok::TokenKind getTokenID() const { return (tok::TokenKind)TokenID; } + + /// \brief True if RevertTokenIDToIdentifier() was called. + bool hasRevertedTokenIDToIdentifier() const { return RevertedTokenID; } + + /// \brief Revert TokenID to tok::identifier; used for GNU libstdc++ 4.2 + /// compatibility. + /// + /// TokenID is normally read-only but there are 2 instances where we revert it + /// to tok::identifier for libstdc++ 4.2. Keep track of when this happens + /// using this method so we can inform serialization about it. + void RevertTokenIDToIdentifier() { + assert(TokenID != tok::identifier && "Already at tok::identifier"); + TokenID = tok::identifier; + RevertedTokenID = true; + } + + /// getPPKeywordID - Return the preprocessor keyword ID for this identifier. + /// For example, "define" will return tok::pp_define. + tok::PPKeywordKind getPPKeywordID() const; + + /// getObjCKeywordID - Return the Objective-C keyword ID for the this + /// identifier. For example, 'class' will return tok::objc_class if ObjC is + /// enabled. + tok::ObjCKeywordKind getObjCKeywordID() const { + if (ObjCOrBuiltinID < tok::NUM_OBJC_KEYWORDS) + return tok::ObjCKeywordKind(ObjCOrBuiltinID); + else + return tok::objc_not_keyword; + } + void setObjCKeywordID(tok::ObjCKeywordKind ID) { ObjCOrBuiltinID = ID; } + + /// getBuiltinID - Return a value indicating whether this is a builtin + /// function. 0 is not-built-in. 1 is builtin-for-some-nonprimary-target. + /// 2+ are specific builtin functions. + unsigned getBuiltinID() const { + if (ObjCOrBuiltinID >= tok::NUM_OBJC_KEYWORDS) + return ObjCOrBuiltinID - tok::NUM_OBJC_KEYWORDS; + else + return 0; + } + void setBuiltinID(unsigned ID) { + ObjCOrBuiltinID = ID + tok::NUM_OBJC_KEYWORDS; + assert(ObjCOrBuiltinID - unsigned(tok::NUM_OBJC_KEYWORDS) == ID + && "ID too large for field!"); + } + + unsigned getObjCOrBuiltinID() const { return ObjCOrBuiltinID; } + void setObjCOrBuiltinID(unsigned ID) { ObjCOrBuiltinID = ID; } + + /// get/setExtension - Initialize information about whether or not this + /// language token is an extension. This controls extension warnings, and is + /// only valid if a custom token ID is set. + bool isExtensionToken() const { return IsExtension; } + void setIsExtensionToken(bool Val) { + IsExtension = Val; + if (Val) + NeedsHandleIdentifier = 1; + else + RecomputeNeedsHandleIdentifier(); + } + + /// is/setIsCXX11CompatKeyword - Initialize information about whether or not + /// this language token is a keyword in C++11. This controls compatibility + /// warnings, and is only true when not parsing C++11. Once a compatibility + /// problem has been diagnosed with this keyword, the flag will be cleared. + bool isCXX11CompatKeyword() const { return IsCXX11CompatKeyword; } + void setIsCXX11CompatKeyword(bool Val) { + IsCXX11CompatKeyword = Val; + if (Val) + NeedsHandleIdentifier = 1; + else + RecomputeNeedsHandleIdentifier(); + } + + /// setIsPoisoned - Mark this identifier as poisoned. After poisoning, the + /// Preprocessor will emit an error every time this token is used. + void setIsPoisoned(bool Value = true) { + IsPoisoned = Value; + if (Value) + NeedsHandleIdentifier = 1; + else + RecomputeNeedsHandleIdentifier(); + } + + /// isPoisoned - Return true if this token has been poisoned. + bool isPoisoned() const { return IsPoisoned; } + + /// isCPlusPlusOperatorKeyword/setIsCPlusPlusOperatorKeyword controls whether + /// this identifier is a C++ alternate representation of an operator. + void setIsCPlusPlusOperatorKeyword(bool Val = true) { + IsCPPOperatorKeyword = Val; + if (Val) + NeedsHandleIdentifier = 1; + else + RecomputeNeedsHandleIdentifier(); + } + bool isCPlusPlusOperatorKeyword() const { return IsCPPOperatorKeyword; } + + /// getFETokenInfo/setFETokenInfo - The language front-end is allowed to + /// associate arbitrary metadata with this token. + template<typename T> + T *getFETokenInfo() const { return static_cast<T*>(FETokenInfo); } + void setFETokenInfo(void *T) { FETokenInfo = T; } + + /// isHandleIdentifierCase - Return true if the Preprocessor::HandleIdentifier + /// must be called on a token of this identifier. If this returns false, we + /// know that HandleIdentifier will not affect the token. + bool isHandleIdentifierCase() const { return NeedsHandleIdentifier; } + + /// isFromAST - Return true if the identifier in its current state was loaded + /// from an AST file. + bool isFromAST() const { return IsFromAST; } + + void setIsFromAST() { IsFromAST = true; } + + /// \brief Determine whether this identifier has changed since it was loaded + /// from an AST file. + bool hasChangedSinceDeserialization() const { + return ChangedAfterLoad; + } + + /// \brief Note that this identifier has changed since it was loaded from + /// an AST file. + void setChangedSinceDeserialization() { + ChangedAfterLoad = true; + } + + /// \brief Determine whether the information for this identifier is out of + /// date with respect to the external source. + bool isOutOfDate() const { return OutOfDate; } + + /// \brief Set whether the information for this identifier is out of + /// date with respect to the external source. + void setOutOfDate(bool OOD) { + OutOfDate = OOD; + if (OOD) + NeedsHandleIdentifier = true; + else + RecomputeNeedsHandleIdentifier(); + } + + /// \brief Determine whether this is the contextual keyword + /// '__experimental_modules_import'. + bool isModulesImport() const { return IsModulesImport; } + + /// \brief Set whether this identifier is the contextual keyword + /// '__experimental_modules_import'. + void setModulesImport(bool I) { + IsModulesImport = I; + if (I) + NeedsHandleIdentifier = true; + else + RecomputeNeedsHandleIdentifier(); + } + +private: + /// RecomputeNeedsHandleIdentifier - The Preprocessor::HandleIdentifier does + /// several special (but rare) things to identifiers of various sorts. For + /// example, it changes the "for" keyword token from tok::identifier to + /// tok::for. + /// + /// This method is very tied to the definition of HandleIdentifier. Any + /// change to it should be reflected here. + void RecomputeNeedsHandleIdentifier() { + NeedsHandleIdentifier = + (isPoisoned() | hasMacroDefinition() | isCPlusPlusOperatorKeyword() | + isExtensionToken() | isCXX11CompatKeyword() || isOutOfDate() || + isModulesImport()); + } +}; + +/// \brief an RAII object for [un]poisoning an identifier +/// within a certain scope. II is allowed to be null, in +/// which case, objects of this type have no effect. +class PoisonIdentifierRAIIObject { + IdentifierInfo *const II; + const bool OldValue; +public: + PoisonIdentifierRAIIObject(IdentifierInfo *II, bool NewValue) + : II(II), OldValue(II ? II->isPoisoned() : false) { + if(II) + II->setIsPoisoned(NewValue); + } + + ~PoisonIdentifierRAIIObject() { + if(II) + II->setIsPoisoned(OldValue); + } +}; + +/// \brief An iterator that walks over all of the known identifiers +/// in the lookup table. +/// +/// Since this iterator uses an abstract interface via virtual +/// functions, it uses an object-oriented interface rather than the +/// more standard C++ STL iterator interface. In this OO-style +/// iteration, the single function \c Next() provides dereference, +/// advance, and end-of-sequence checking in a single +/// operation. Subclasses of this iterator type will provide the +/// actual functionality. +class IdentifierIterator { +private: + IdentifierIterator(const IdentifierIterator&); // Do not implement + IdentifierIterator &operator=(const IdentifierIterator&); // Do not implement + +protected: + IdentifierIterator() { } + +public: + virtual ~IdentifierIterator(); + + /// \brief Retrieve the next string in the identifier table and + /// advances the iterator for the following string. + /// + /// \returns The next string in the identifier table. If there is + /// no such string, returns an empty \c StringRef. + virtual StringRef Next() = 0; +}; + +/// IdentifierInfoLookup - An abstract class used by IdentifierTable that +/// provides an interface for performing lookups from strings +/// (const char *) to IdentiferInfo objects. +class IdentifierInfoLookup { +public: + virtual ~IdentifierInfoLookup(); + + /// get - Return the identifier token info for the specified named identifier. + /// Unlike the version in IdentifierTable, this returns a pointer instead + /// of a reference. If the pointer is NULL then the IdentifierInfo cannot + /// be found. + virtual IdentifierInfo* get(StringRef Name) = 0; + + /// \brief Retrieve an iterator into the set of all identifiers + /// known to this identifier lookup source. + /// + /// This routine provides access to all of the identifiers known to + /// the identifier lookup, allowing access to the contents of the + /// identifiers without introducing the overhead of constructing + /// IdentifierInfo objects for each. + /// + /// \returns A new iterator into the set of known identifiers. The + /// caller is responsible for deleting this iterator. + virtual IdentifierIterator *getIdentifiers() const; +}; + +/// \brief An abstract class used to resolve numerical identifier +/// references (meaningful only to some external source) into +/// IdentifierInfo pointers. +class ExternalIdentifierLookup { +public: + virtual ~ExternalIdentifierLookup(); + + /// \brief Return the identifier associated with the given ID number. + /// + /// The ID 0 is associated with the NULL identifier. + virtual IdentifierInfo *GetIdentifier(unsigned ID) = 0; +}; + +/// IdentifierTable - This table implements an efficient mapping from strings to +/// IdentifierInfo nodes. It has no other purpose, but this is an +/// extremely performance-critical piece of the code, as each occurrence of +/// every identifier goes through here when lexed. +class IdentifierTable { + // Shark shows that using MallocAllocator is *much* slower than using this + // BumpPtrAllocator! + typedef llvm::StringMap<IdentifierInfo*, llvm::BumpPtrAllocator> HashTableTy; + HashTableTy HashTable; + + IdentifierInfoLookup* ExternalLookup; + +public: + /// IdentifierTable ctor - Create the identifier table, populating it with + /// info about the language keywords for the language specified by LangOpts. + IdentifierTable(const LangOptions &LangOpts, + IdentifierInfoLookup* externalLookup = 0); + + /// \brief Set the external identifier lookup mechanism. + void setExternalIdentifierLookup(IdentifierInfoLookup *IILookup) { + ExternalLookup = IILookup; + } + + /// \brief Retrieve the external identifier lookup object, if any. + IdentifierInfoLookup *getExternalIdentifierLookup() const { + return ExternalLookup; + } + + llvm::BumpPtrAllocator& getAllocator() { + return HashTable.getAllocator(); + } + + /// get - Return the identifier token info for the specified named identifier. + /// + IdentifierInfo &get(StringRef Name) { + llvm::StringMapEntry<IdentifierInfo*> &Entry = + HashTable.GetOrCreateValue(Name); + + IdentifierInfo *II = Entry.getValue(); + if (II) return *II; + + // No entry; if we have an external lookup, look there first. + if (ExternalLookup) { + II = ExternalLookup->get(Name); + if (II) { + // Cache in the StringMap for subsequent lookups. + Entry.setValue(II); + return *II; + } + } + + // Lookups failed, make a new IdentifierInfo. + void *Mem = getAllocator().Allocate<IdentifierInfo>(); + II = new (Mem) IdentifierInfo(); + Entry.setValue(II); + + // Make sure getName() knows how to find the IdentifierInfo + // contents. + II->Entry = &Entry; + + return *II; + } + + IdentifierInfo &get(StringRef Name, tok::TokenKind TokenCode) { + IdentifierInfo &II = get(Name); + II.TokenID = TokenCode; + assert(II.TokenID == (unsigned) TokenCode && "TokenCode too large"); + return II; + } + + /// \brief Gets an IdentifierInfo for the given name without consulting + /// external sources. + /// + /// This is a version of get() meant for external sources that want to + /// introduce or modify an identifier. If they called get(), they would + /// likely end up in a recursion. + IdentifierInfo &getOwn(StringRef Name) { + llvm::StringMapEntry<IdentifierInfo*> &Entry = + HashTable.GetOrCreateValue(Name); + + IdentifierInfo *II = Entry.getValue(); + if (!II) { + + // Lookups failed, make a new IdentifierInfo. + void *Mem = getAllocator().Allocate<IdentifierInfo>(); + II = new (Mem) IdentifierInfo(); + Entry.setValue(II); + + // Make sure getName() knows how to find the IdentifierInfo + // contents. + II->Entry = &Entry; + + // If this is the 'import' contextual keyword, mark it as such. + if (Name.equals("import")) + II->setModulesImport(true); + } + + return *II; + } + + typedef HashTableTy::const_iterator iterator; + typedef HashTableTy::const_iterator const_iterator; + + iterator begin() const { return HashTable.begin(); } + iterator end() const { return HashTable.end(); } + unsigned size() const { return HashTable.size(); } + + /// PrintStats - Print some statistics to stderr that indicate how well the + /// hashing is doing. + void PrintStats() const; + + void AddKeywords(const LangOptions &LangOpts); +}; + +/// ObjCMethodFamily - A family of Objective-C methods. These +/// families have no inherent meaning in the language, but are +/// nonetheless central enough in the existing implementations to +/// merit direct AST support. While, in theory, arbitrary methods can +/// be considered to form families, we focus here on the methods +/// involving allocation and retain-count management, as these are the +/// most "core" and the most likely to be useful to diverse clients +/// without extra information. +/// +/// Both selectors and actual method declarations may be classified +/// into families. Method families may impose additional restrictions +/// beyond their selector name; for example, a method called '_init' +/// that returns void is not considered to be in the 'init' family +/// (but would be if it returned 'id'). It is also possible to +/// explicitly change or remove a method's family. Therefore the +/// method's family should be considered the single source of truth. +enum ObjCMethodFamily { + /// \brief No particular method family. + OMF_None, + + // Selectors in these families may have arbitrary arity, may be + // written with arbitrary leading underscores, and may have + // additional CamelCase "words" in their first selector chunk + // following the family name. + OMF_alloc, + OMF_copy, + OMF_init, + OMF_mutableCopy, + OMF_new, + + // These families are singletons consisting only of the nullary + // selector with the given name. + OMF_autorelease, + OMF_dealloc, + OMF_finalize, + OMF_release, + OMF_retain, + OMF_retainCount, + OMF_self, + + // performSelector families + OMF_performSelector +}; + +/// Enough bits to store any enumerator in ObjCMethodFamily or +/// InvalidObjCMethodFamily. +enum { ObjCMethodFamilyBitWidth = 4 }; + +/// An invalid value of ObjCMethodFamily. +enum { InvalidObjCMethodFamily = (1 << ObjCMethodFamilyBitWidth) - 1 }; + +/// Selector - This smart pointer class efficiently represents Objective-C +/// method names. This class will either point to an IdentifierInfo or a +/// MultiKeywordSelector (which is private). This enables us to optimize +/// selectors that take no arguments and selectors that take 1 argument, which +/// accounts for 78% of all selectors in Cocoa.h. +class Selector { + friend class Diagnostic; + + enum IdentifierInfoFlag { + // MultiKeywordSelector = 0. + ZeroArg = 0x1, + OneArg = 0x2, + ArgFlags = ZeroArg|OneArg + }; + uintptr_t InfoPtr; // a pointer to the MultiKeywordSelector or IdentifierInfo. + + Selector(IdentifierInfo *II, unsigned nArgs) { + InfoPtr = reinterpret_cast<uintptr_t>(II); + assert((InfoPtr & ArgFlags) == 0 &&"Insufficiently aligned IdentifierInfo"); + assert(nArgs < 2 && "nArgs not equal to 0/1"); + InfoPtr |= nArgs+1; + } + Selector(MultiKeywordSelector *SI) { + InfoPtr = reinterpret_cast<uintptr_t>(SI); + assert((InfoPtr & ArgFlags) == 0 &&"Insufficiently aligned IdentifierInfo"); + } + + IdentifierInfo *getAsIdentifierInfo() const { + if (getIdentifierInfoFlag()) + return reinterpret_cast<IdentifierInfo *>(InfoPtr & ~ArgFlags); + return 0; + } + unsigned getIdentifierInfoFlag() const { + return InfoPtr & ArgFlags; + } + + static ObjCMethodFamily getMethodFamilyImpl(Selector sel); + +public: + friend class SelectorTable; // only the SelectorTable can create these + friend class DeclarationName; // and the AST's DeclarationName. + + /// The default ctor should only be used when creating data structures that + /// will contain selectors. + Selector() : InfoPtr(0) {} + Selector(uintptr_t V) : InfoPtr(V) {} + + /// operator==/!= - Indicate whether the specified selectors are identical. + bool operator==(Selector RHS) const { + return InfoPtr == RHS.InfoPtr; + } + bool operator!=(Selector RHS) const { + return InfoPtr != RHS.InfoPtr; + } + void *getAsOpaquePtr() const { + return reinterpret_cast<void*>(InfoPtr); + } + + /// \brief Determine whether this is the empty selector. + bool isNull() const { return InfoPtr == 0; } + + // Predicates to identify the selector type. + bool isKeywordSelector() const { + return getIdentifierInfoFlag() != ZeroArg; + } + bool isUnarySelector() const { + return getIdentifierInfoFlag() == ZeroArg; + } + unsigned getNumArgs() const; + + + /// \brief Retrieve the identifier at a given position in the selector. + /// + /// Note that the identifier pointer returned may be NULL. Clients that only + /// care about the text of the identifier string, and not the specific, + /// uniqued identifier pointer, should use \c getNameForSlot(), which returns + /// an empty string when the identifier pointer would be NULL. + /// + /// \param argIndex The index for which we want to retrieve the identifier. + /// This index shall be less than \c getNumArgs() unless this is a keyword + /// selector, in which case 0 is the only permissible value. + /// + /// \returns the uniqued identifier for this slot, or NULL if this slot has + /// no corresponding identifier. + IdentifierInfo *getIdentifierInfoForSlot(unsigned argIndex) const; + + /// \brief Retrieve the name at a given position in the selector. + /// + /// \param argIndex The index for which we want to retrieve the name. + /// This index shall be less than \c getNumArgs() unless this is a keyword + /// selector, in which case 0 is the only permissible value. + /// + /// \returns the name for this slot, which may be the empty string if no + /// name was supplied. + StringRef getNameForSlot(unsigned argIndex) const; + + /// getAsString - Derive the full selector name (e.g. "foo:bar:") and return + /// it as an std::string. + std::string getAsString() const; + + /// getMethodFamily - Derive the conventional family of this method. + ObjCMethodFamily getMethodFamily() const { + return getMethodFamilyImpl(*this); + } + + static Selector getEmptyMarker() { + return Selector(uintptr_t(-1)); + } + static Selector getTombstoneMarker() { + return Selector(uintptr_t(-2)); + } +}; + +/// SelectorTable - This table allows us to fully hide how we implement +/// multi-keyword caching. +class SelectorTable { + void *Impl; // Actually a SelectorTableImpl + SelectorTable(const SelectorTable&); // DISABLED: DO NOT IMPLEMENT + void operator=(const SelectorTable&); // DISABLED: DO NOT IMPLEMENT +public: + SelectorTable(); + ~SelectorTable(); + + /// getSelector - This can create any sort of selector. NumArgs indicates + /// whether this is a no argument selector "foo", a single argument selector + /// "foo:" or multi-argument "foo:bar:". + Selector getSelector(unsigned NumArgs, IdentifierInfo **IIV); + + Selector getUnarySelector(IdentifierInfo *ID) { + return Selector(ID, 1); + } + Selector getNullarySelector(IdentifierInfo *ID) { + return Selector(ID, 0); + } + + /// Return the total amount of memory allocated for managing selectors. + size_t getTotalMemory() const; + + /// constructSetterName - Return the setter name for the given + /// identifier, i.e. "set" + Name where the initial character of Name + /// has been capitalized. + static Selector constructSetterName(IdentifierTable &Idents, + SelectorTable &SelTable, + const IdentifierInfo *Name); +}; + +/// DeclarationNameExtra - Common base of the MultiKeywordSelector, +/// CXXSpecialName, and CXXOperatorIdName classes, all of which are +/// private classes that describe different kinds of names. +class DeclarationNameExtra { +public: + /// ExtraKind - The kind of "extra" information stored in the + /// DeclarationName. See @c ExtraKindOrNumArgs for an explanation of + /// how these enumerator values are used. + enum ExtraKind { + CXXConstructor = 0, + CXXDestructor, + CXXConversionFunction, +#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ + CXXOperator##Name, +#include "clang/Basic/OperatorKinds.def" + CXXLiteralOperator, + CXXUsingDirective, + NUM_EXTRA_KINDS + }; + + /// ExtraKindOrNumArgs - Either the kind of C++ special name or + /// operator-id (if the value is one of the CXX* enumerators of + /// ExtraKind), in which case the DeclarationNameExtra is also a + /// CXXSpecialName, (for CXXConstructor, CXXDestructor, or + /// CXXConversionFunction) CXXOperatorIdName, or CXXLiteralOperatorName, + /// it may be also name common to C++ using-directives (CXXUsingDirective), + /// otherwise it is NUM_EXTRA_KINDS+NumArgs, where NumArgs is the number of + /// arguments in the Objective-C selector, in which case the + /// DeclarationNameExtra is also a MultiKeywordSelector. + unsigned ExtraKindOrNumArgs; +}; + +} // end namespace clang + +namespace llvm { +/// Define DenseMapInfo so that Selectors can be used as keys in DenseMap and +/// DenseSets. +template <> +struct DenseMapInfo<clang::Selector> { + static inline clang::Selector getEmptyKey() { + return clang::Selector::getEmptyMarker(); + } + static inline clang::Selector getTombstoneKey() { + return clang::Selector::getTombstoneMarker(); + } + + static unsigned getHashValue(clang::Selector S); + + static bool isEqual(clang::Selector LHS, clang::Selector RHS) { + return LHS == RHS; + } +}; + +template <> +struct isPodLike<clang::Selector> { static const bool value = true; }; + +template<> +class PointerLikeTypeTraits<clang::Selector> { +public: + static inline const void *getAsVoidPointer(clang::Selector P) { + return P.getAsOpaquePtr(); + } + static inline clang::Selector getFromVoidPointer(const void *P) { + return clang::Selector(reinterpret_cast<uintptr_t>(P)); + } + enum { NumLowBitsAvailable = 0 }; +}; + +// Provide PointerLikeTypeTraits for IdentifierInfo pointers, which +// are not guaranteed to be 8-byte aligned. +template<> +class PointerLikeTypeTraits<clang::IdentifierInfo*> { +public: + static inline void *getAsVoidPointer(clang::IdentifierInfo* P) { + return P; + } + static inline clang::IdentifierInfo *getFromVoidPointer(void *P) { + return static_cast<clang::IdentifierInfo*>(P); + } + enum { NumLowBitsAvailable = 1 }; +}; + +template<> +class PointerLikeTypeTraits<const clang::IdentifierInfo*> { +public: + static inline const void *getAsVoidPointer(const clang::IdentifierInfo* P) { + return P; + } + static inline const clang::IdentifierInfo *getFromVoidPointer(const void *P) { + return static_cast<const clang::IdentifierInfo*>(P); + } + enum { NumLowBitsAvailable = 1 }; +}; + +} // end namespace llvm +#endif |