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//===--- Parser.h - C Language Parser ---------------------------*- 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 Parser interface.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_PARSE_PARSER_H
#define LLVM_CLANG_PARSE_PARSER_H
#include "clang/Basic/Specifiers.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/CodeCompletionHandler.h"
#include "clang/Sema/Sema.h"
#include "clang/Sema/DeclSpec.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/PrettyStackTrace.h"
#include <stack>
namespace clang {
class PragmaHandler;
class Scope;
class DeclGroupRef;
class DiagnosticBuilder;
class Parser;
class PragmaUnusedHandler;
class ColonProtectionRAIIObject;
class InMessageExpressionRAIIObject;
class PoisonSEHIdentifiersRAIIObject;
class VersionTuple;
/// PrettyStackTraceParserEntry - If a crash happens while the parser is active,
/// an entry is printed for it.
class PrettyStackTraceParserEntry : public llvm::PrettyStackTraceEntry {
const Parser &P;
public:
PrettyStackTraceParserEntry(const Parser &p) : P(p) {}
virtual void print(raw_ostream &OS) const;
};
/// PrecedenceLevels - These are precedences for the binary/ternary
/// operators in the C99 grammar. These have been named to relate
/// with the C99 grammar productions. Low precedences numbers bind
/// more weakly than high numbers.
namespace prec {
enum Level {
Unknown = 0, // Not binary operator.
Comma = 1, // ,
Assignment = 2, // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
Conditional = 3, // ?
LogicalOr = 4, // ||
LogicalAnd = 5, // &&
InclusiveOr = 6, // |
ExclusiveOr = 7, // ^
And = 8, // &
Equality = 9, // ==, !=
Relational = 10, // >=, <=, >, <
Shift = 11, // <<, >>
Additive = 12, // -, +
Multiplicative = 13, // *, /, %
PointerToMember = 14 // .*, ->*
};
}
/// Parser - This implements a parser for the C family of languages. After
/// parsing units of the grammar, productions are invoked to handle whatever has
/// been read.
///
class Parser : public CodeCompletionHandler {
friend class PragmaUnusedHandler;
friend class ColonProtectionRAIIObject;
friend class InMessageExpressionRAIIObject;
friend class PoisonSEHIdentifiersRAIIObject;
friend class ParenBraceBracketBalancer;
Preprocessor &PP;
/// Tok - The current token we are peeking ahead. All parsing methods assume
/// that this is valid.
Token Tok;
// PrevTokLocation - The location of the token we previously
// consumed. This token is used for diagnostics where we expected to
// see a token following another token (e.g., the ';' at the end of
// a statement).
SourceLocation PrevTokLocation;
unsigned short ParenCount, BracketCount, BraceCount;
/// Actions - These are the callbacks we invoke as we parse various constructs
/// in the file.
Sema &Actions;
DiagnosticsEngine &Diags;
/// ScopeCache - Cache scopes to reduce malloc traffic.
enum { ScopeCacheSize = 16 };
unsigned NumCachedScopes;
Scope *ScopeCache[ScopeCacheSize];
/// Identifiers used for SEH handling in Borland. These are only
/// allowed in particular circumstances
// __except block
IdentifierInfo *Ident__exception_code,
*Ident___exception_code,
*Ident_GetExceptionCode;
// __except filter expression
IdentifierInfo *Ident__exception_info,
*Ident___exception_info,
*Ident_GetExceptionInfo;
// __finally
IdentifierInfo *Ident__abnormal_termination,
*Ident___abnormal_termination,
*Ident_AbnormalTermination;
/// Contextual keywords for Microsoft extensions.
IdentifierInfo *Ident__except;
/// Ident_super - IdentifierInfo for "super", to support fast
/// comparison.
IdentifierInfo *Ident_super;
/// Ident_vector and Ident_pixel - cached IdentifierInfo's for
/// "vector" and "pixel" fast comparison. Only present if
/// AltiVec enabled.
IdentifierInfo *Ident_vector;
IdentifierInfo *Ident_pixel;
/// Objective-C contextual keywords.
mutable IdentifierInfo *Ident_instancetype;
/// \brief Identifier for "introduced".
IdentifierInfo *Ident_introduced;
/// \brief Identifier for "deprecated".
IdentifierInfo *Ident_deprecated;
/// \brief Identifier for "obsoleted".
IdentifierInfo *Ident_obsoleted;
/// \brief Identifier for "unavailable".
IdentifierInfo *Ident_unavailable;
/// \brief Identifier for "message".
IdentifierInfo *Ident_message;
/// C++0x contextual keywords.
mutable IdentifierInfo *Ident_final;
mutable IdentifierInfo *Ident_override;
OwningPtr<PragmaHandler> AlignHandler;
OwningPtr<PragmaHandler> GCCVisibilityHandler;
OwningPtr<PragmaHandler> OptionsHandler;
OwningPtr<PragmaHandler> PackHandler;
OwningPtr<PragmaHandler> MSStructHandler;
OwningPtr<PragmaHandler> UnusedHandler;
OwningPtr<PragmaHandler> WeakHandler;
OwningPtr<PragmaHandler> RedefineExtnameHandler;
OwningPtr<PragmaHandler> FPContractHandler;
OwningPtr<PragmaHandler> OpenCLExtensionHandler;
/// Whether the '>' token acts as an operator or not. This will be
/// true except when we are parsing an expression within a C++
/// template argument list, where the '>' closes the template
/// argument list.
bool GreaterThanIsOperator;
/// ColonIsSacred - When this is false, we aggressively try to recover from
/// code like "foo : bar" as if it were a typo for "foo :: bar". This is not
/// safe in case statements and a few other things. This is managed by the
/// ColonProtectionRAIIObject RAII object.
bool ColonIsSacred;
/// \brief When true, we are directly inside an Objective-C messsage
/// send expression.
///
/// This is managed by the \c InMessageExpressionRAIIObject class, and
/// should not be set directly.
bool InMessageExpression;
/// The "depth" of the template parameters currently being parsed.
unsigned TemplateParameterDepth;
/// Factory object for creating AttributeList objects.
AttributeFactory AttrFactory;
/// \brief Gathers and cleans up TemplateIdAnnotations when parsing of a
/// top-level declaration is finished.
SmallVector<TemplateIdAnnotation *, 16> TemplateIds;
IdentifierInfo *getSEHExceptKeyword();
bool SkipFunctionBodies;
public:
Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies);
~Parser();
const LangOptions &getLangOpts() const { return PP.getLangOpts(); }
const TargetInfo &getTargetInfo() const { return PP.getTargetInfo(); }
Preprocessor &getPreprocessor() const { return PP; }
Sema &getActions() const { return Actions; }
const Token &getCurToken() const { return Tok; }
Scope *getCurScope() const { return Actions.getCurScope(); }
Decl *getObjCDeclContext() const { return Actions.getObjCDeclContext(); }
// Type forwarding. All of these are statically 'void*', but they may all be
// different actual classes based on the actions in place.
typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
typedef OpaquePtr<TemplateName> TemplateTy;
typedef SmallVector<TemplateParameterList *, 4> TemplateParameterLists;
typedef clang::ExprResult ExprResult;
typedef clang::StmtResult StmtResult;
typedef clang::BaseResult BaseResult;
typedef clang::MemInitResult MemInitResult;
typedef clang::TypeResult TypeResult;
typedef Expr *ExprArg;
typedef ASTMultiPtr<Stmt*> MultiStmtArg;
typedef Sema::FullExprArg FullExprArg;
/// Adorns a ExprResult with Actions to make it an ExprResult
ExprResult Owned(ExprResult res) {
return ExprResult(res);
}
/// Adorns a StmtResult with Actions to make it an StmtResult
StmtResult Owned(StmtResult res) {
return StmtResult(res);
}
ExprResult ExprError() { return ExprResult(true); }
StmtResult StmtError() { return StmtResult(true); }
ExprResult ExprError(const DiagnosticBuilder &) { return ExprError(); }
StmtResult StmtError(const DiagnosticBuilder &) { return StmtError(); }
ExprResult ExprEmpty() { return ExprResult(false); }
// Parsing methods.
/// ParseTranslationUnit - All in one method that initializes parses, and
/// shuts down the parser.
void ParseTranslationUnit();
/// Initialize - Warm up the parser.
///
void Initialize();
/// ParseTopLevelDecl - Parse one top-level declaration. Returns true if
/// the EOF was encountered.
bool ParseTopLevelDecl(DeclGroupPtrTy &Result);
private:
//===--------------------------------------------------------------------===//
// Low-Level token peeking and consumption methods.
//
/// isTokenParen - Return true if the cur token is '(' or ')'.
bool isTokenParen() const {
return Tok.getKind() == tok::l_paren || Tok.getKind() == tok::r_paren;
}
/// isTokenBracket - Return true if the cur token is '[' or ']'.
bool isTokenBracket() const {
return Tok.getKind() == tok::l_square || Tok.getKind() == tok::r_square;
}
/// isTokenBrace - Return true if the cur token is '{' or '}'.
bool isTokenBrace() const {
return Tok.getKind() == tok::l_brace || Tok.getKind() == tok::r_brace;
}
/// isTokenStringLiteral - True if this token is a string-literal.
///
bool isTokenStringLiteral() const {
return Tok.getKind() == tok::string_literal ||
Tok.getKind() == tok::wide_string_literal ||
Tok.getKind() == tok::utf8_string_literal ||
Tok.getKind() == tok::utf16_string_literal ||
Tok.getKind() == tok::utf32_string_literal;
}
/// \brief Returns true if the current token is '=' or is a type of '='.
/// For typos, give a fixit to '='
bool isTokenEqualOrEqualTypo();
/// ConsumeToken - Consume the current 'peek token' and lex the next one.
/// This does not work with all kinds of tokens: strings and specific other
/// tokens must be consumed with custom methods below. This returns the
/// location of the consumed token.
SourceLocation ConsumeToken() {
assert(!isTokenStringLiteral() && !isTokenParen() && !isTokenBracket() &&
!isTokenBrace() &&
"Should consume special tokens with Consume*Token");
if (Tok.is(tok::code_completion))
return handleUnexpectedCodeCompletionToken();
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
/// ConsumeAnyToken - Dispatch to the right Consume* method based on the
/// current token type. This should only be used in cases where the type of
/// the token really isn't known, e.g. in error recovery.
SourceLocation ConsumeAnyToken() {
if (isTokenParen())
return ConsumeParen();
else if (isTokenBracket())
return ConsumeBracket();
else if (isTokenBrace())
return ConsumeBrace();
else if (isTokenStringLiteral())
return ConsumeStringToken();
else
return ConsumeToken();
}
/// ConsumeParen - This consume method keeps the paren count up-to-date.
///
SourceLocation ConsumeParen() {
assert(isTokenParen() && "wrong consume method");
if (Tok.getKind() == tok::l_paren)
++ParenCount;
else if (ParenCount)
--ParenCount; // Don't let unbalanced )'s drive the count negative.
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
/// ConsumeBracket - This consume method keeps the bracket count up-to-date.
///
SourceLocation ConsumeBracket() {
assert(isTokenBracket() && "wrong consume method");
if (Tok.getKind() == tok::l_square)
++BracketCount;
else if (BracketCount)
--BracketCount; // Don't let unbalanced ]'s drive the count negative.
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
/// ConsumeBrace - This consume method keeps the brace count up-to-date.
///
SourceLocation ConsumeBrace() {
assert(isTokenBrace() && "wrong consume method");
if (Tok.getKind() == tok::l_brace)
++BraceCount;
else if (BraceCount)
--BraceCount; // Don't let unbalanced }'s drive the count negative.
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
/// ConsumeStringToken - Consume the current 'peek token', lexing a new one
/// and returning the token kind. This method is specific to strings, as it
/// handles string literal concatenation, as per C99 5.1.1.2, translation
/// phase #6.
SourceLocation ConsumeStringToken() {
assert(isTokenStringLiteral() &&
"Should only consume string literals with this method");
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
/// \brief Consume the current code-completion token.
///
/// This routine should be called to consume the code-completion token once
/// a code-completion action has already been invoked.
SourceLocation ConsumeCodeCompletionToken() {
assert(Tok.is(tok::code_completion));
PrevTokLocation = Tok.getLocation();
PP.Lex(Tok);
return PrevTokLocation;
}
///\ brief When we are consuming a code-completion token without having
/// matched specific position in the grammar, provide code-completion results
/// based on context.
///
/// \returns the source location of the code-completion token.
SourceLocation handleUnexpectedCodeCompletionToken();
/// \brief Abruptly cut off parsing; mainly used when we have reached the
/// code-completion point.
void cutOffParsing() {
PP.setCodeCompletionReached();
// Cut off parsing by acting as if we reached the end-of-file.
Tok.setKind(tok::eof);
}
/// \brief Handle the annotation token produced for #pragma unused(...)
void HandlePragmaUnused();
/// \brief Handle the annotation token produced for
/// #pragma GCC visibility...
void HandlePragmaVisibility();
/// \brief Handle the annotation token produced for
/// #pragma pack...
void HandlePragmaPack();
/// GetLookAheadToken - This peeks ahead N tokens and returns that token
/// without consuming any tokens. LookAhead(0) returns 'Tok', LookAhead(1)
/// returns the token after Tok, etc.
///
/// Note that this differs from the Preprocessor's LookAhead method, because
/// the Parser always has one token lexed that the preprocessor doesn't.
///
const Token &GetLookAheadToken(unsigned N) {
if (N == 0 || Tok.is(tok::eof)) return Tok;
return PP.LookAhead(N-1);
}
/// NextToken - This peeks ahead one token and returns it without
/// consuming it.
const Token &NextToken() {
return PP.LookAhead(0);
}
/// \brief RAII class that helps handle the parsing of an open/close delimiter
/// pair, such as braces { ... } or parentheses ( ... ).
class BalancedDelimiterTracker {
Parser& P;
tok::TokenKind Kind, Close;
SourceLocation (Parser::*Consumer)();
SourceLocation LOpen, LClose;
unsigned short &getDepth() {
switch (Kind) {
case tok::l_brace: return P.BraceCount;
case tok::l_square: return P.BracketCount;
case tok::l_paren: return P.ParenCount;
default: llvm_unreachable("Wrong token kind");
}
}
enum { MaxDepth = 512 };
bool diagnoseOverflow();
bool diagnoseMissingClose();
public:
BalancedDelimiterTracker(Parser& p, tok::TokenKind k) : P(p), Kind(k) {
switch (Kind) {
default: llvm_unreachable("Unexpected balanced token");
case tok::l_brace:
Close = tok::r_brace;
Consumer = &Parser::ConsumeBrace;
break;
case tok::l_paren:
Close = tok::r_paren;
Consumer = &Parser::ConsumeParen;
break;
case tok::l_square:
Close = tok::r_square;
Consumer = &Parser::ConsumeBracket;
break;
}
}
SourceLocation getOpenLocation() const { return LOpen; }
SourceLocation getCloseLocation() const { return LClose; }
SourceRange getRange() const { return SourceRange(LOpen, LClose); }
bool consumeOpen() {
if (!P.Tok.is(Kind))
return true;
if (getDepth() < MaxDepth) {
LOpen = (P.*Consumer)();
return false;
}
return diagnoseOverflow();
}
bool expectAndConsume(unsigned DiagID,
const char *Msg = "",
tok::TokenKind SkipToTok = tok::unknown);
bool consumeClose() {
if (P.Tok.is(Close)) {
LClose = (P.*Consumer)();
return false;
}
return diagnoseMissingClose();
}
void skipToEnd();
};
/// getTypeAnnotation - Read a parsed type out of an annotation token.
static ParsedType getTypeAnnotation(Token &Tok) {
return ParsedType::getFromOpaquePtr(Tok.getAnnotationValue());
}
static void setTypeAnnotation(Token &Tok, ParsedType T) {
Tok.setAnnotationValue(T.getAsOpaquePtr());
}
/// \brief Read an already-translated primary expression out of an annotation
/// token.
static ExprResult getExprAnnotation(Token &Tok) {
if (Tok.getAnnotationValue())
return ExprResult((Expr *)Tok.getAnnotationValue());
return ExprResult(true);
}
/// \brief Set the primary expression corresponding to the given annotation
/// token.
static void setExprAnnotation(Token &Tok, ExprResult ER) {
if (ER.isInvalid())
Tok.setAnnotationValue(0);
else
Tok.setAnnotationValue(ER.get());
}
// If NeedType is true, then TryAnnotateTypeOrScopeToken will try harder to
// find a type name by attempting typo correction.
bool TryAnnotateTypeOrScopeToken(bool EnteringContext = false,
bool NeedType = false);
bool TryAnnotateCXXScopeToken(bool EnteringContext = false);
/// TryAltiVecToken - Check for context-sensitive AltiVec identifier tokens,
/// replacing them with the non-context-sensitive keywords. This returns
/// true if the token was replaced.
bool TryAltiVecToken(DeclSpec &DS, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
bool &isInvalid) {
if (!getLangOpts().AltiVec ||
(Tok.getIdentifierInfo() != Ident_vector &&
Tok.getIdentifierInfo() != Ident_pixel))
return false;
return TryAltiVecTokenOutOfLine(DS, Loc, PrevSpec, DiagID, isInvalid);
}
/// TryAltiVecVectorToken - Check for context-sensitive AltiVec vector
/// identifier token, replacing it with the non-context-sensitive __vector.
/// This returns true if the token was replaced.
bool TryAltiVecVectorToken() {
if (!getLangOpts().AltiVec ||
Tok.getIdentifierInfo() != Ident_vector) return false;
return TryAltiVecVectorTokenOutOfLine();
}
bool TryAltiVecVectorTokenOutOfLine();
bool TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
const char *&PrevSpec, unsigned &DiagID,
bool &isInvalid);
/// \brief Get the TemplateIdAnnotation from the token.
TemplateIdAnnotation *takeTemplateIdAnnotation(const Token &tok);
/// TentativeParsingAction - An object that is used as a kind of "tentative
/// parsing transaction". It gets instantiated to mark the token position and
/// after the token consumption is done, Commit() or Revert() is called to
/// either "commit the consumed tokens" or revert to the previously marked
/// token position. Example:
///
/// TentativeParsingAction TPA(*this);
/// ConsumeToken();
/// ....
/// TPA.Revert();
///
class TentativeParsingAction {
Parser &P;
Token PrevTok;
unsigned short PrevParenCount, PrevBracketCount, PrevBraceCount;
bool isActive;
public:
explicit TentativeParsingAction(Parser& p) : P(p) {
PrevTok = P.Tok;
PrevParenCount = P.ParenCount;
PrevBracketCount = P.BracketCount;
PrevBraceCount = P.BraceCount;
P.PP.EnableBacktrackAtThisPos();
isActive = true;
}
void Commit() {
assert(isActive && "Parsing action was finished!");
P.PP.CommitBacktrackedTokens();
isActive = false;
}
void Revert() {
assert(isActive && "Parsing action was finished!");
P.PP.Backtrack();
P.Tok = PrevTok;
P.ParenCount = PrevParenCount;
P.BracketCount = PrevBracketCount;
P.BraceCount = PrevBraceCount;
isActive = false;
}
~TentativeParsingAction() {
assert(!isActive && "Forgot to call Commit or Revert!");
}
};
/// ObjCDeclContextSwitch - An object used to switch context from
/// an objective-c decl context to its enclosing decl context and
/// back.
class ObjCDeclContextSwitch {
Parser &P;
Decl *DC;
public:
explicit ObjCDeclContextSwitch(Parser &p) : P(p),
DC(p.getObjCDeclContext()) {
if (DC)
P.Actions.ActOnObjCTemporaryExitContainerContext(cast<DeclContext>(DC));
}
~ObjCDeclContextSwitch() {
if (DC)
P.Actions.ActOnObjCReenterContainerContext(cast<DeclContext>(DC));
}
};
/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the
/// input. If so, it is consumed and false is returned.
///
/// If the input is malformed, this emits the specified diagnostic. Next, if
/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is
/// returned.
bool ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned Diag,
const char *DiagMsg = "",
tok::TokenKind SkipToTok = tok::unknown);
/// \brief The parser expects a semicolon and, if present, will consume it.
///
/// If the next token is not a semicolon, this emits the specified diagnostic,
/// or, if there's just some closing-delimiter noise (e.g., ')' or ']') prior
/// to the semicolon, consumes that extra token.
bool ExpectAndConsumeSemi(unsigned DiagID);
//===--------------------------------------------------------------------===//
// Scope manipulation
/// ParseScope - Introduces a new scope for parsing. The kind of
/// scope is determined by ScopeFlags. Objects of this type should
/// be created on the stack to coincide with the position where the
/// parser enters the new scope, and this object's constructor will
/// create that new scope. Similarly, once the object is destroyed
/// the parser will exit the scope.
class ParseScope {
Parser *Self;
ParseScope(const ParseScope&); // do not implement
ParseScope& operator=(const ParseScope&); // do not implement
public:
// ParseScope - Construct a new object to manage a scope in the
// parser Self where the new Scope is created with the flags
// ScopeFlags, but only when ManageScope is true (the default). If
// ManageScope is false, this object does nothing.
ParseScope(Parser *Self, unsigned ScopeFlags, bool ManageScope = true)
: Self(Self) {
if (ManageScope)
Self->EnterScope(ScopeFlags);
else
this->Self = 0;
}
// Exit - Exit the scope associated with this object now, rather
// than waiting until the object is destroyed.
void Exit() {
if (Self) {
Self->ExitScope();
Self = 0;
}
}
~ParseScope() {
Exit();
}
};
/// EnterScope - Start a new scope.
void EnterScope(unsigned ScopeFlags);
/// ExitScope - Pop a scope off the scope stack.
void ExitScope();
/// \brief RAII object used to modify the scope flags for the current scope.
class ParseScopeFlags {
Scope *CurScope;
unsigned OldFlags;
ParseScopeFlags(const ParseScopeFlags &); // do not implement
void operator=(const ParseScopeFlags &); // do not implement
public:
ParseScopeFlags(Parser *Self, unsigned ScopeFlags, bool ManageFlags = true);
~ParseScopeFlags();
};
//===--------------------------------------------------------------------===//
// Diagnostic Emission and Error recovery.
public:
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID);
DiagnosticBuilder Diag(const Token &Tok, unsigned DiagID);
private:
void SuggestParentheses(SourceLocation Loc, unsigned DK,
SourceRange ParenRange);
void CheckNestedObjCContexts(SourceLocation AtLoc);
/// SkipUntil - Read tokens until we get to the specified token, then consume
/// it (unless DontConsume is true). Because we cannot guarantee that the
/// token will ever occur, this skips to the next token, or to some likely
/// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
/// character.
///
/// If SkipUntil finds the specified token, it returns true, otherwise it
/// returns false.
bool SkipUntil(tok::TokenKind T, bool StopAtSemi = true,
bool DontConsume = false, bool StopAtCodeCompletion = false) {
return SkipUntil(llvm::makeArrayRef(T), StopAtSemi, DontConsume,
StopAtCodeCompletion);
}
bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2, bool StopAtSemi = true,
bool DontConsume = false, bool StopAtCodeCompletion = false) {
tok::TokenKind TokArray[] = {T1, T2};
return SkipUntil(TokArray, StopAtSemi, DontConsume,StopAtCodeCompletion);
}
bool SkipUntil(tok::TokenKind T1, tok::TokenKind T2, tok::TokenKind T3,
bool StopAtSemi = true, bool DontConsume = false,
bool StopAtCodeCompletion = false) {
tok::TokenKind TokArray[] = {T1, T2, T3};
return SkipUntil(TokArray, StopAtSemi, DontConsume,StopAtCodeCompletion);
}
bool SkipUntil(ArrayRef<tok::TokenKind> Toks, bool StopAtSemi = true,
bool DontConsume = false, bool StopAtCodeCompletion = false);
/// SkipMalformedDecl - Read tokens until we get to some likely good stopping
/// point for skipping past a simple-declaration.
void SkipMalformedDecl();
//===--------------------------------------------------------------------===//
// Lexing and parsing of C++ inline methods.
struct ParsingClass;
/// [class.mem]p1: "... the class is regarded as complete within
/// - function bodies
/// - default arguments
/// - exception-specifications (TODO: C++0x)
/// - and brace-or-equal-initializers for non-static data members
/// (including such things in nested classes)."
/// LateParsedDeclarations build the tree of those elements so they can
/// be parsed after parsing the top-level class.
class LateParsedDeclaration {
public:
virtual ~LateParsedDeclaration();
virtual void ParseLexedMethodDeclarations();
virtual void ParseLexedMemberInitializers();
virtual void ParseLexedMethodDefs();
virtual void ParseLexedAttributes();
};
/// Inner node of the LateParsedDeclaration tree that parses
/// all its members recursively.
class LateParsedClass : public LateParsedDeclaration {
public:
LateParsedClass(Parser *P, ParsingClass *C);
virtual ~LateParsedClass();
virtual void ParseLexedMethodDeclarations();
virtual void ParseLexedMemberInitializers();
virtual void ParseLexedMethodDefs();
virtual void ParseLexedAttributes();
private:
Parser *Self;
ParsingClass *Class;
};
/// Contains the lexed tokens of an attribute with arguments that
/// may reference member variables and so need to be parsed at the
/// end of the class declaration after parsing all other member
/// member declarations.
/// FIXME: Perhaps we should change the name of LateParsedDeclaration to
/// LateParsedTokens.
struct LateParsedAttribute : public LateParsedDeclaration {
Parser *Self;
CachedTokens Toks;
IdentifierInfo &AttrName;
SourceLocation AttrNameLoc;
SmallVector<Decl*, 2> Decls;
explicit LateParsedAttribute(Parser *P, IdentifierInfo &Name,
SourceLocation Loc)
: Self(P), AttrName(Name), AttrNameLoc(Loc) {}
virtual void ParseLexedAttributes();
void addDecl(Decl *D) { Decls.push_back(D); }
};
/// A list of late parsed attributes. Used by ParseGNUAttributes.
typedef llvm::SmallVector<LateParsedAttribute*, 2> LateParsedAttrList;
/// Contains the lexed tokens of a member function definition
/// which needs to be parsed at the end of the class declaration
/// after parsing all other member declarations.
struct LexedMethod : public LateParsedDeclaration {
Parser *Self;
Decl *D;
CachedTokens Toks;
/// \brief Whether this member function had an associated template
/// scope. When true, D is a template declaration.
/// othewise, it is a member function declaration.
bool TemplateScope;
explicit LexedMethod(Parser* P, Decl *MD)
: Self(P), D(MD), TemplateScope(false) {}
virtual void ParseLexedMethodDefs();
};
/// LateParsedDefaultArgument - Keeps track of a parameter that may
/// have a default argument that cannot be parsed yet because it
/// occurs within a member function declaration inside the class
/// (C++ [class.mem]p2).
struct LateParsedDefaultArgument {
explicit LateParsedDefaultArgument(Decl *P,
CachedTokens *Toks = 0)
: Param(P), Toks(Toks) { }
/// Param - The parameter declaration for this parameter.
Decl *Param;
/// Toks - The sequence of tokens that comprises the default
/// argument expression, not including the '=' or the terminating
/// ')' or ','. This will be NULL for parameters that have no
/// default argument.
CachedTokens *Toks;
};
/// LateParsedMethodDeclaration - A method declaration inside a class that
/// contains at least one entity whose parsing needs to be delayed
/// until the class itself is completely-defined, such as a default
/// argument (C++ [class.mem]p2).
struct LateParsedMethodDeclaration : public LateParsedDeclaration {
explicit LateParsedMethodDeclaration(Parser *P, Decl *M)
: Self(P), Method(M), TemplateScope(false), ExceptionSpecTokens(0) { }
virtual void ParseLexedMethodDeclarations();
Parser* Self;
/// Method - The method declaration.
Decl *Method;
/// \brief Whether this member function had an associated template
/// scope. When true, D is a template declaration.
/// othewise, it is a member function declaration.
bool TemplateScope;
/// DefaultArgs - Contains the parameters of the function and
/// their default arguments. At least one of the parameters will
/// have a default argument, but all of the parameters of the
/// method will be stored so that they can be reintroduced into
/// scope at the appropriate times.
SmallVector<LateParsedDefaultArgument, 8> DefaultArgs;
/// \brief The set of tokens that make up an exception-specification that
/// has not yet been parsed.
CachedTokens *ExceptionSpecTokens;
};
/// LateParsedMemberInitializer - An initializer for a non-static class data
/// member whose parsing must to be delayed until the class is completely
/// defined (C++11 [class.mem]p2).
struct LateParsedMemberInitializer : public LateParsedDeclaration {
LateParsedMemberInitializer(Parser *P, Decl *FD)
: Self(P), Field(FD) { }
virtual void ParseLexedMemberInitializers();
Parser *Self;
/// Field - The field declaration.
Decl *Field;
/// CachedTokens - The sequence of tokens that comprises the initializer,
/// including any leading '='.
CachedTokens Toks;
};
/// LateParsedDeclarationsContainer - During parsing of a top (non-nested)
/// C++ class, its method declarations that contain parts that won't be
/// parsed until after the definition is completed (C++ [class.mem]p2),
/// the method declarations and possibly attached inline definitions
/// will be stored here with the tokens that will be parsed to create those
/// entities.
typedef SmallVector<LateParsedDeclaration*,2> LateParsedDeclarationsContainer;
/// \brief Representation of a class that has been parsed, including
/// any member function declarations or definitions that need to be
/// parsed after the corresponding top-level class is complete.
struct ParsingClass {
ParsingClass(Decl *TagOrTemplate, bool TopLevelClass)
: TopLevelClass(TopLevelClass), TemplateScope(false),
TagOrTemplate(TagOrTemplate) { }
/// \brief Whether this is a "top-level" class, meaning that it is
/// not nested within another class.
bool TopLevelClass : 1;
/// \brief Whether this class had an associated template
/// scope. When true, TagOrTemplate is a template declaration;
/// othewise, it is a tag declaration.
bool TemplateScope : 1;
/// \brief The class or class template whose definition we are parsing.
Decl *TagOrTemplate;
/// LateParsedDeclarations - Method declarations, inline definitions and
/// nested classes that contain pieces whose parsing will be delayed until
/// the top-level class is fully defined.
LateParsedDeclarationsContainer LateParsedDeclarations;
};
/// \brief The stack of classes that is currently being
/// parsed. Nested and local classes will be pushed onto this stack
/// when they are parsed, and removed afterward.
std::stack<ParsingClass *> ClassStack;
ParsingClass &getCurrentClass() {
assert(!ClassStack.empty() && "No lexed method stacks!");
return *ClassStack.top();
}
/// \brief RAII object used to inform the actions that we're
/// currently parsing a declaration. This is active when parsing a
/// variable's initializer, but not when parsing the body of a
/// class or function definition.
class ParsingDeclRAIIObject {
Sema &Actions;
Sema::ParsingDeclState State;
bool Popped;
public:
ParsingDeclRAIIObject(Parser &P) : Actions(P.Actions) {
push();
}
ParsingDeclRAIIObject(Parser &P, ParsingDeclRAIIObject *Other)
: Actions(P.Actions) {
if (Other) steal(*Other);
else push();
}
/// Creates a RAII object which steals the state from a different
/// object instead of pushing.
ParsingDeclRAIIObject(ParsingDeclRAIIObject &Other)
: Actions(Other.Actions) {
steal(Other);
}
~ParsingDeclRAIIObject() {
abort();
}
/// Resets the RAII object for a new declaration.
void reset() {
abort();
push();
}
/// Signals that the context was completed without an appropriate
/// declaration being parsed.
void abort() {
pop(0);
}
void complete(Decl *D) {
assert(!Popped && "ParsingDeclaration has already been popped!");
pop(D);
}
private:
void steal(ParsingDeclRAIIObject &Other) {
State = Other.State;
Popped = Other.Popped;
Other.Popped = true;
}
void push() {
State = Actions.PushParsingDeclaration();
Popped = false;
}
void pop(Decl *D) {
if (!Popped) {
Actions.PopParsingDeclaration(State, D);
Popped = true;
}
}
};
/// A class for parsing a DeclSpec.
class ParsingDeclSpec : public DeclSpec {
ParsingDeclRAIIObject ParsingRAII;
public:
ParsingDeclSpec(Parser &P) : DeclSpec(P.AttrFactory), ParsingRAII(P) {}
ParsingDeclSpec(Parser &P, ParsingDeclRAIIObject *RAII)
: DeclSpec(P.AttrFactory), ParsingRAII(P, RAII) {}
void complete(Decl *D) {
ParsingRAII.complete(D);
}
void abort() {
ParsingRAII.abort();
}
};
/// A class for parsing a declarator.
class ParsingDeclarator : public Declarator {
ParsingDeclRAIIObject ParsingRAII;
public:
ParsingDeclarator(Parser &P, const ParsingDeclSpec &DS, TheContext C)
: Declarator(DS, C), ParsingRAII(P) {
}
const ParsingDeclSpec &getDeclSpec() const {
return static_cast<const ParsingDeclSpec&>(Declarator::getDeclSpec());
}
ParsingDeclSpec &getMutableDeclSpec() const {
return const_cast<ParsingDeclSpec&>(getDeclSpec());
}
void clear() {
Declarator::clear();
ParsingRAII.reset();
}
void complete(Decl *D) {
ParsingRAII.complete(D);
}
};
/// \brief RAII object used to
class ParsingClassDefinition {
Parser &P;
bool Popped;
Sema::ParsingClassState State;
public:
ParsingClassDefinition(Parser &P, Decl *TagOrTemplate, bool TopLevelClass)
: P(P), Popped(false),
State(P.PushParsingClass(TagOrTemplate, TopLevelClass)) {
}
/// \brief Pop this class of the stack.
void Pop() {
assert(!Popped && "Nested class has already been popped");
Popped = true;
P.PopParsingClass(State);
}
~ParsingClassDefinition() {
if (!Popped)
P.PopParsingClass(State);
}
};
/// \brief Contains information about any template-specific
/// information that has been parsed prior to parsing declaration
/// specifiers.
struct ParsedTemplateInfo {
ParsedTemplateInfo()
: Kind(NonTemplate), TemplateParams(0), TemplateLoc() { }
ParsedTemplateInfo(TemplateParameterLists *TemplateParams,
bool isSpecialization,
bool lastParameterListWasEmpty = false)
: Kind(isSpecialization? ExplicitSpecialization : Template),
TemplateParams(TemplateParams),
LastParameterListWasEmpty(lastParameterListWasEmpty) { }
explicit ParsedTemplateInfo(SourceLocation ExternLoc,
SourceLocation TemplateLoc)
: Kind(ExplicitInstantiation), TemplateParams(0),
ExternLoc(ExternLoc), TemplateLoc(TemplateLoc),
LastParameterListWasEmpty(false){ }
/// \brief The kind of template we are parsing.
enum {
/// \brief We are not parsing a template at all.
NonTemplate = 0,
/// \brief We are parsing a template declaration.
Template,
/// \brief We are parsing an explicit specialization.
ExplicitSpecialization,
/// \brief We are parsing an explicit instantiation.
ExplicitInstantiation
} Kind;
/// \brief The template parameter lists, for template declarations
/// and explicit specializations.
TemplateParameterLists *TemplateParams;
/// \brief The location of the 'extern' keyword, if any, for an explicit
/// instantiation
SourceLocation ExternLoc;
/// \brief The location of the 'template' keyword, for an explicit
/// instantiation.
SourceLocation TemplateLoc;
/// \brief Whether the last template parameter list was empty.
bool LastParameterListWasEmpty;
SourceRange getSourceRange() const LLVM_READONLY;
};
/// \brief Contains a late templated function.
/// Will be parsed at the end of the translation unit.
struct LateParsedTemplatedFunction {
explicit LateParsedTemplatedFunction(Decl *MD)
: D(MD) {}
CachedTokens Toks;
/// \brief The template function declaration to be late parsed.
Decl *D;
};
void LexTemplateFunctionForLateParsing(CachedTokens &Toks);
void ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT);
typedef llvm::DenseMap<const FunctionDecl*, LateParsedTemplatedFunction*>
LateParsedTemplateMapT;
LateParsedTemplateMapT LateParsedTemplateMap;
static void LateTemplateParserCallback(void *P, const FunctionDecl *FD);
void LateTemplateParser(const FunctionDecl *FD);
Sema::ParsingClassState
PushParsingClass(Decl *TagOrTemplate, bool TopLevelClass);
void DeallocateParsedClasses(ParsingClass *Class);
void PopParsingClass(Sema::ParsingClassState);
Decl *ParseCXXInlineMethodDef(AccessSpecifier AS, AttributeList *AccessAttrs,
ParsingDeclarator &D,
const ParsedTemplateInfo &TemplateInfo,
const VirtSpecifiers& VS,
FunctionDefinitionKind DefinitionKind,
ExprResult& Init);
void ParseCXXNonStaticMemberInitializer(Decl *VarD);
void ParseLexedAttributes(ParsingClass &Class);
void ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
bool EnterScope, bool OnDefinition);
void ParseLexedAttribute(LateParsedAttribute &LA,
bool EnterScope, bool OnDefinition);
void ParseLexedMethodDeclarations(ParsingClass &Class);
void ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM);
void ParseLexedMethodDefs(ParsingClass &Class);
void ParseLexedMethodDef(LexedMethod &LM);
void ParseLexedMemberInitializers(ParsingClass &Class);
void ParseLexedMemberInitializer(LateParsedMemberInitializer &MI);
Decl *ParseLexedObjCMethodDefs(LexedMethod &LM);
bool ConsumeAndStoreFunctionPrologue(CachedTokens &Toks);
bool ConsumeAndStoreUntil(tok::TokenKind T1,
CachedTokens &Toks,
bool StopAtSemi = true,
bool ConsumeFinalToken = true) {
return ConsumeAndStoreUntil(T1, T1, Toks, StopAtSemi, ConsumeFinalToken);
}
bool ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
CachedTokens &Toks,
bool StopAtSemi = true,
bool ConsumeFinalToken = true);
//===--------------------------------------------------------------------===//
// C99 6.9: External Definitions.
struct ParsedAttributesWithRange : ParsedAttributes {
ParsedAttributesWithRange(AttributeFactory &factory)
: ParsedAttributes(factory) {}
SourceRange Range;
};
DeclGroupPtrTy ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
ParsingDeclSpec *DS = 0);
bool isDeclarationAfterDeclarator();
bool isStartOfFunctionDefinition(const ParsingDeclarator &Declarator);
DeclGroupPtrTy ParseDeclarationOrFunctionDefinition(ParsedAttributes &attrs,
AccessSpecifier AS = AS_none);
DeclGroupPtrTy ParseDeclarationOrFunctionDefinition(ParsingDeclSpec &DS,
AccessSpecifier AS = AS_none);
Decl *ParseFunctionDefinition(ParsingDeclarator &D,
const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
LateParsedAttrList *LateParsedAttrs = 0);
void ParseKNRParamDeclarations(Declarator &D);
// EndLoc, if non-NULL, is filled with the location of the last token of
// the simple-asm.
ExprResult ParseSimpleAsm(SourceLocation *EndLoc = 0);
ExprResult ParseAsmStringLiteral();
// Objective-C External Declarations
DeclGroupPtrTy ParseObjCAtDirectives();
DeclGroupPtrTy ParseObjCAtClassDeclaration(SourceLocation atLoc);
Decl *ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc,
ParsedAttributes &prefixAttrs);
void ParseObjCClassInstanceVariables(Decl *interfaceDecl,
tok::ObjCKeywordKind visibility,
SourceLocation atLoc);
bool ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &P,
SmallVectorImpl<SourceLocation> &PLocs,
bool WarnOnDeclarations,
SourceLocation &LAngleLoc,
SourceLocation &EndProtoLoc);
bool ParseObjCProtocolQualifiers(DeclSpec &DS);
void ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey,
Decl *CDecl);
DeclGroupPtrTy ParseObjCAtProtocolDeclaration(SourceLocation atLoc,
ParsedAttributes &prefixAttrs);
struct ObjCImplParsingDataRAII {
Parser &P;
Decl *Dcl;
typedef SmallVector<LexedMethod*, 8> LateParsedObjCMethodContainer;
LateParsedObjCMethodContainer LateParsedObjCMethods;
ObjCImplParsingDataRAII(Parser &parser, Decl *D)
: P(parser), Dcl(D) {
P.CurParsedObjCImpl = this;
Finished = false;
}
~ObjCImplParsingDataRAII();
void finish(SourceRange AtEnd);
bool isFinished() const { return Finished; }
private:
bool Finished;
};
ObjCImplParsingDataRAII *CurParsedObjCImpl;
DeclGroupPtrTy ParseObjCAtImplementationDeclaration(SourceLocation AtLoc);
DeclGroupPtrTy ParseObjCAtEndDeclaration(SourceRange atEnd);
Decl *ParseObjCAtAliasDeclaration(SourceLocation atLoc);
Decl *ParseObjCPropertySynthesize(SourceLocation atLoc);
Decl *ParseObjCPropertyDynamic(SourceLocation atLoc);
IdentifierInfo *ParseObjCSelectorPiece(SourceLocation &MethodLocation);
// Definitions for Objective-c context sensitive keywords recognition.
enum ObjCTypeQual {
objc_in=0, objc_out, objc_inout, objc_oneway, objc_bycopy, objc_byref,
objc_NumQuals
};
IdentifierInfo *ObjCTypeQuals[objc_NumQuals];
bool isTokIdentifier_in() const;
ParsedType ParseObjCTypeName(ObjCDeclSpec &DS, Declarator::TheContext Ctx,
ParsedAttributes *ParamAttrs);
void ParseObjCMethodRequirement();
Decl *ParseObjCMethodPrototype(
tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword,
bool MethodDefinition = true);
Decl *ParseObjCMethodDecl(SourceLocation mLoc, tok::TokenKind mType,
tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword,
bool MethodDefinition=true);
void ParseObjCPropertyAttribute(ObjCDeclSpec &DS);
Decl *ParseObjCMethodDefinition();
//===--------------------------------------------------------------------===//
// C99 6.5: Expressions.
/// TypeCastState - State whether an expression is or may be a type cast.
enum TypeCastState {
NotTypeCast = 0,
MaybeTypeCast,
IsTypeCast
};
ExprResult ParseExpression(TypeCastState isTypeCast = NotTypeCast);
ExprResult ParseConstantExpression(TypeCastState isTypeCast = NotTypeCast);
// Expr that doesn't include commas.
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast = NotTypeCast);
ExprResult ParseExpressionWithLeadingAt(SourceLocation AtLoc);
ExprResult ParseExpressionWithLeadingExtension(SourceLocation ExtLoc);
ExprResult ParseRHSOfBinaryExpression(ExprResult LHS,
prec::Level MinPrec);
ExprResult ParseCastExpression(bool isUnaryExpression,
bool isAddressOfOperand,
bool &NotCastExpr,
TypeCastState isTypeCast);
ExprResult ParseCastExpression(bool isUnaryExpression,
bool isAddressOfOperand = false,
TypeCastState isTypeCast = NotTypeCast);
/// Returns true if the next token would start a postfix-expression
/// suffix.
bool isPostfixExpressionSuffixStart() {
tok::TokenKind K = Tok.getKind();
return (K == tok::l_square || K == tok::l_paren ||
K == tok::period || K == tok::arrow ||
K == tok::plusplus || K == tok::minusminus);
}
ExprResult ParsePostfixExpressionSuffix(ExprResult LHS);
ExprResult ParseUnaryExprOrTypeTraitExpression();
ExprResult ParseBuiltinPrimaryExpression();
ExprResult ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
bool &isCastExpr,
ParsedType &CastTy,
SourceRange &CastRange);
typedef SmallVector<Expr*, 20> ExprListTy;
typedef SmallVector<SourceLocation, 20> CommaLocsTy;
/// ParseExpressionList - Used for C/C++ (argument-)expression-list.
bool ParseExpressionList(SmallVectorImpl<Expr*> &Exprs,
SmallVectorImpl<SourceLocation> &CommaLocs,
void (Sema::*Completer)(Scope *S,
Expr *Data,
llvm::ArrayRef<Expr *> Args) = 0,
Expr *Data = 0);
/// ParenParseOption - Control what ParseParenExpression will parse.
enum ParenParseOption {
SimpleExpr, // Only parse '(' expression ')'
CompoundStmt, // Also allow '(' compound-statement ')'
CompoundLiteral, // Also allow '(' type-name ')' '{' ... '}'
CastExpr // Also allow '(' type-name ')' <anything>
};
ExprResult ParseParenExpression(ParenParseOption &ExprType,
bool stopIfCastExpr,
bool isTypeCast,
ParsedType &CastTy,
SourceLocation &RParenLoc);
ExprResult ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType,
ParsedType &CastTy,
BalancedDelimiterTracker &Tracker);
ExprResult ParseCompoundLiteralExpression(ParsedType Ty,
SourceLocation LParenLoc,
SourceLocation RParenLoc);
ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral = false);
ExprResult ParseGenericSelectionExpression();
ExprResult ParseObjCBoolLiteral();
//===--------------------------------------------------------------------===//
// C++ Expressions
ExprResult ParseCXXIdExpression(bool isAddressOfOperand = false);
void CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectTypePtr,
bool EnteringContext, IdentifierInfo &II,
CXXScopeSpec &SS);
bool ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS,
ParsedType ObjectType,
bool EnteringContext,
bool *MayBePseudoDestructor = 0,
bool IsTypename = false);
//===--------------------------------------------------------------------===//
// C++0x 5.1.2: Lambda expressions
// [...] () -> type {...}
ExprResult ParseLambdaExpression();
ExprResult TryParseLambdaExpression();
llvm::Optional<unsigned> ParseLambdaIntroducer(LambdaIntroducer &Intro);
bool TryParseLambdaIntroducer(LambdaIntroducer &Intro);
ExprResult ParseLambdaExpressionAfterIntroducer(
LambdaIntroducer &Intro);
//===--------------------------------------------------------------------===//
// C++ 5.2p1: C++ Casts
ExprResult ParseCXXCasts();
//===--------------------------------------------------------------------===//
// C++ 5.2p1: C++ Type Identification
ExprResult ParseCXXTypeid();
//===--------------------------------------------------------------------===//
// C++ : Microsoft __uuidof Expression
ExprResult ParseCXXUuidof();
//===--------------------------------------------------------------------===//
// C++ 5.2.4: C++ Pseudo-Destructor Expressions
ExprResult ParseCXXPseudoDestructor(ExprArg Base, SourceLocation OpLoc,
tok::TokenKind OpKind,
CXXScopeSpec &SS,
ParsedType ObjectType);
//===--------------------------------------------------------------------===//
// C++ 9.3.2: C++ 'this' pointer
ExprResult ParseCXXThis();
//===--------------------------------------------------------------------===//
// C++ 15: C++ Throw Expression
ExprResult ParseThrowExpression();
ExceptionSpecificationType tryParseExceptionSpecification(
SourceRange &SpecificationRange,
SmallVectorImpl<ParsedType> &DynamicExceptions,
SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
ExprResult &NoexceptExpr);
// EndLoc is filled with the location of the last token of the specification.
ExceptionSpecificationType ParseDynamicExceptionSpecification(
SourceRange &SpecificationRange,
SmallVectorImpl<ParsedType> &Exceptions,
SmallVectorImpl<SourceRange> &Ranges);
//===--------------------------------------------------------------------===//
// C++0x 8: Function declaration trailing-return-type
TypeResult ParseTrailingReturnType(SourceRange &Range);
//===--------------------------------------------------------------------===//
// C++ 2.13.5: C++ Boolean Literals
ExprResult ParseCXXBoolLiteral();
//===--------------------------------------------------------------------===//
// C++ 5.2.3: Explicit type conversion (functional notation)
ExprResult ParseCXXTypeConstructExpression(const DeclSpec &DS);
bool isCXXSimpleTypeSpecifier() const;
/// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers.
/// This should only be called when the current token is known to be part of
/// simple-type-specifier.
void ParseCXXSimpleTypeSpecifier(DeclSpec &DS);
bool ParseCXXTypeSpecifierSeq(DeclSpec &DS);
//===--------------------------------------------------------------------===//
// C++ 5.3.4 and 5.3.5: C++ new and delete
bool ParseExpressionListOrTypeId(SmallVectorImpl<Expr*> &Exprs,
Declarator &D);
void ParseDirectNewDeclarator(Declarator &D);
ExprResult ParseCXXNewExpression(bool UseGlobal, SourceLocation Start);
ExprResult ParseCXXDeleteExpression(bool UseGlobal,
SourceLocation Start);
//===--------------------------------------------------------------------===//
// C++ if/switch/while condition expression.
bool ParseCXXCondition(ExprResult &ExprResult, Decl *&DeclResult,
SourceLocation Loc, bool ConvertToBoolean);
//===--------------------------------------------------------------------===//
// C++ types
//===--------------------------------------------------------------------===//
// C99 6.7.8: Initialization.
/// ParseInitializer
/// initializer: [C99 6.7.8]
/// assignment-expression
/// '{' ...
ExprResult ParseInitializer() {
if (Tok.isNot(tok::l_brace))
return ParseAssignmentExpression();
return ParseBraceInitializer();
}
bool MayBeDesignationStart();
ExprResult ParseBraceInitializer();
ExprResult ParseInitializerWithPotentialDesignator();
//===--------------------------------------------------------------------===//
// clang Expressions
ExprResult ParseBlockLiteralExpression(); // ^{...}
//===--------------------------------------------------------------------===//
// Objective-C Expressions
ExprResult ParseObjCAtExpression(SourceLocation AtLocation);
ExprResult ParseObjCStringLiteral(SourceLocation AtLoc);
ExprResult ParseObjCCharacterLiteral(SourceLocation AtLoc);
ExprResult ParseObjCNumericLiteral(SourceLocation AtLoc);
ExprResult ParseObjCBooleanLiteral(SourceLocation AtLoc, bool ArgValue);
ExprResult ParseObjCArrayLiteral(SourceLocation AtLoc);
ExprResult ParseObjCDictionaryLiteral(SourceLocation AtLoc);
ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc);
ExprResult ParseObjCSelectorExpression(SourceLocation AtLoc);
ExprResult ParseObjCProtocolExpression(SourceLocation AtLoc);
bool isSimpleObjCMessageExpression();
ExprResult ParseObjCMessageExpression();
ExprResult ParseObjCMessageExpressionBody(SourceLocation LBracloc,
SourceLocation SuperLoc,
ParsedType ReceiverType,
ExprArg ReceiverExpr);
ExprResult ParseAssignmentExprWithObjCMessageExprStart(
SourceLocation LBracloc, SourceLocation SuperLoc,
ParsedType ReceiverType, ExprArg ReceiverExpr);
bool ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr);
//===--------------------------------------------------------------------===//
// C99 6.8: Statements and Blocks.
StmtResult ParseStatement(SourceLocation *TrailingElseLoc = 0) {
StmtVector Stmts(Actions);
return ParseStatementOrDeclaration(Stmts, true, TrailingElseLoc);
}
StmtResult ParseStatementOrDeclaration(StmtVector &Stmts,
bool OnlyStatement,
SourceLocation *TrailingElseLoc = 0);
StmtResult ParseStatementOrDeclarationAfterAttributes(
StmtVector &Stmts,
bool OnlyStatement,
SourceLocation *TrailingElseLoc,
ParsedAttributesWithRange &Attrs);
StmtResult ParseExprStatement();
StmtResult ParseLabeledStatement(ParsedAttributesWithRange &attrs);
StmtResult ParseCaseStatement(bool MissingCase = false,
ExprResult Expr = ExprResult());
StmtResult ParseDefaultStatement();
StmtResult ParseCompoundStatement(bool isStmtExpr = false);
StmtResult ParseCompoundStatement(bool isStmtExpr,
unsigned ScopeFlags);
StmtResult ParseCompoundStatementBody(bool isStmtExpr = false);
bool ParseParenExprOrCondition(ExprResult &ExprResult,
Decl *&DeclResult,
SourceLocation Loc,
bool ConvertToBoolean);
StmtResult ParseIfStatement(SourceLocation *TrailingElseLoc);
StmtResult ParseSwitchStatement(SourceLocation *TrailingElseLoc);
StmtResult ParseWhileStatement(SourceLocation *TrailingElseLoc);
StmtResult ParseDoStatement();
StmtResult ParseForStatement(SourceLocation *TrailingElseLoc);
StmtResult ParseGotoStatement();
StmtResult ParseContinueStatement();
StmtResult ParseBreakStatement();
StmtResult ParseReturnStatement();
StmtResult ParseAsmStatement(bool &msAsm);
StmtResult ParseMicrosoftAsmStatement(SourceLocation AsmLoc);
/// \brief Describes the behavior that should be taken for an __if_exists
/// block.
enum IfExistsBehavior {
/// \brief Parse the block; this code is always used.
IEB_Parse,
/// \brief Skip the block entirely; this code is never used.
IEB_Skip,
/// \brief Parse the block as a dependent block, which may be used in
/// some template instantiations but not others.
IEB_Dependent
};
/// \brief Describes the condition of a Microsoft __if_exists or
/// __if_not_exists block.
struct IfExistsCondition {
/// \brief The location of the initial keyword.
SourceLocation KeywordLoc;
/// \brief Whether this is an __if_exists block (rather than an
/// __if_not_exists block).
bool IsIfExists;
/// \brief Nested-name-specifier preceding the name.
CXXScopeSpec SS;
/// \brief The name we're looking for.
UnqualifiedId Name;
/// \brief The behavior of this __if_exists or __if_not_exists block
/// should.
IfExistsBehavior Behavior;
};
bool ParseMicrosoftIfExistsCondition(IfExistsCondition& Result);
void ParseMicrosoftIfExistsStatement(StmtVector &Stmts);
void ParseMicrosoftIfExistsExternalDeclaration();
void ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType,
AccessSpecifier& CurAS);
bool ParseMicrosoftIfExistsBraceInitializer(ExprVector &InitExprs,
bool &InitExprsOk);
bool ParseAsmOperandsOpt(SmallVectorImpl<IdentifierInfo *> &Names,
SmallVectorImpl<Expr *> &Constraints,
SmallVectorImpl<Expr *> &Exprs);
//===--------------------------------------------------------------------===//
// C++ 6: Statements and Blocks
StmtResult ParseCXXTryBlock();
StmtResult ParseCXXTryBlockCommon(SourceLocation TryLoc);
StmtResult ParseCXXCatchBlock();
//===--------------------------------------------------------------------===//
// MS: SEH Statements and Blocks
StmtResult ParseSEHTryBlock();
StmtResult ParseSEHTryBlockCommon(SourceLocation Loc);
StmtResult ParseSEHExceptBlock(SourceLocation Loc);
StmtResult ParseSEHFinallyBlock(SourceLocation Loc);
//===--------------------------------------------------------------------===//
// Objective-C Statements
StmtResult ParseObjCAtStatement(SourceLocation atLoc);
StmtResult ParseObjCTryStmt(SourceLocation atLoc);
StmtResult ParseObjCThrowStmt(SourceLocation atLoc);
StmtResult ParseObjCSynchronizedStmt(SourceLocation atLoc);
StmtResult ParseObjCAutoreleasePoolStmt(SourceLocation atLoc);
//===--------------------------------------------------------------------===//
// C99 6.7: Declarations.
/// A context for parsing declaration specifiers. TODO: flesh this
/// out, there are other significant restrictions on specifiers than
/// would be best implemented in the parser.
enum DeclSpecContext {
DSC_normal, // normal context
DSC_class, // class context, enables 'friend'
DSC_type_specifier, // C++ type-specifier-seq
DSC_trailing, // C++11 trailing-type-specifier in a trailing return type
DSC_top_level // top-level/namespace declaration context
};
/// Information on a C++0x for-range-initializer found while parsing a
/// declaration which turns out to be a for-range-declaration.
struct ForRangeInit {
SourceLocation ColonLoc;
ExprResult RangeExpr;
bool ParsedForRangeDecl() { return !ColonLoc.isInvalid(); }
};
DeclGroupPtrTy ParseDeclaration(StmtVector &Stmts,
unsigned Context, SourceLocation &DeclEnd,
ParsedAttributesWithRange &attrs);
DeclGroupPtrTy ParseSimpleDeclaration(StmtVector &Stmts,
unsigned Context,
SourceLocation &DeclEnd,
ParsedAttributes &attrs,
bool RequireSemi,
ForRangeInit *FRI = 0);
bool MightBeDeclarator(unsigned Context);
DeclGroupPtrTy ParseDeclGroup(ParsingDeclSpec &DS, unsigned Context,
bool AllowFunctionDefinitions,
SourceLocation *DeclEnd = 0,
ForRangeInit *FRI = 0);
Decl *ParseDeclarationAfterDeclarator(Declarator &D,
const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo());
bool ParseAsmAttributesAfterDeclarator(Declarator &D);
Decl *ParseDeclarationAfterDeclaratorAndAttributes(Declarator &D,
const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo());
Decl *ParseFunctionStatementBody(Decl *Decl, ParseScope &BodyScope);
Decl *ParseFunctionTryBlock(Decl *Decl, ParseScope &BodyScope);
/// \brief When in code-completion, skip parsing of the function/method body
/// unless the body contains the code-completion point.
///
/// \returns true if the function body was skipped.
bool trySkippingFunctionBody();
bool ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
const ParsedTemplateInfo &TemplateInfo,
AccessSpecifier AS, DeclSpecContext DSC);
DeclSpecContext getDeclSpecContextFromDeclaratorContext(unsigned Context);
void ParseDeclarationSpecifiers(DeclSpec &DS,
const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
AccessSpecifier AS = AS_none,
DeclSpecContext DSC = DSC_normal,
LateParsedAttrList *LateAttrs = 0);
void ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS = AS_none,
DeclSpecContext DSC = DSC_normal);
void ParseObjCTypeQualifierList(ObjCDeclSpec &DS,
Declarator::TheContext Context);
void ParseEnumSpecifier(SourceLocation TagLoc, DeclSpec &DS,
const ParsedTemplateInfo &TemplateInfo,
AccessSpecifier AS, DeclSpecContext DSC);
void ParseEnumBody(SourceLocation StartLoc, Decl *TagDecl);
void ParseStructUnionBody(SourceLocation StartLoc, unsigned TagType,
Decl *TagDecl);
struct FieldCallback {
virtual Decl *invoke(FieldDeclarator &Field) = 0;
virtual ~FieldCallback() {}
private:
virtual void _anchor();
};
struct ObjCPropertyCallback;
void ParseStructDeclaration(DeclSpec &DS, FieldCallback &Callback);
bool isDeclarationSpecifier(bool DisambiguatingWithExpression = false);
bool isTypeSpecifierQualifier();
bool isTypeQualifier() const;
/// isKnownToBeTypeSpecifier - Return true if we know that the specified token
/// is definitely a type-specifier. Return false if it isn't part of a type
/// specifier or if we're not sure.
bool isKnownToBeTypeSpecifier(const Token &Tok) const;
/// isDeclarationStatement - Disambiguates between a declaration or an
/// expression statement, when parsing function bodies.
/// Returns true for declaration, false for expression.
bool isDeclarationStatement() {
if (getLangOpts().CPlusPlus)
return isCXXDeclarationStatement();
return isDeclarationSpecifier(true);
}
/// isForInitDeclaration - Disambiguates between a declaration or an
/// expression in the context of the C 'clause-1' or the C++
// 'for-init-statement' part of a 'for' statement.
/// Returns true for declaration, false for expression.
bool isForInitDeclaration() {
if (getLangOpts().CPlusPlus)
return isCXXSimpleDeclaration(/*AllowForRangeDecl=*/true);
return isDeclarationSpecifier(true);
}
/// \brief Determine whether we are currently at the start of an Objective-C
/// class message that appears to be missing the open bracket '['.
bool isStartOfObjCClassMessageMissingOpenBracket();
/// \brief Starting with a scope specifier, identifier, or
/// template-id that refers to the current class, determine whether
/// this is a constructor declarator.
bool isConstructorDeclarator();
/// \brief Specifies the context in which type-id/expression
/// disambiguation will occur.
enum TentativeCXXTypeIdContext {
TypeIdInParens,
TypeIdAsTemplateArgument
};
/// isTypeIdInParens - Assumes that a '(' was parsed and now we want to know
/// whether the parens contain an expression or a type-id.
/// Returns true for a type-id and false for an expression.
bool isTypeIdInParens(bool &isAmbiguous) {
if (getLangOpts().CPlusPlus)
return isCXXTypeId(TypeIdInParens, isAmbiguous);
isAmbiguous = false;
return isTypeSpecifierQualifier();
}
bool isTypeIdInParens() {
bool isAmbiguous;
return isTypeIdInParens(isAmbiguous);
}
/// isCXXDeclarationStatement - C++-specialized function that disambiguates
/// between a declaration or an expression statement, when parsing function
/// bodies. Returns true for declaration, false for expression.
bool isCXXDeclarationStatement();
/// isCXXSimpleDeclaration - C++-specialized function that disambiguates
/// between a simple-declaration or an expression-statement.
/// If during the disambiguation process a parsing error is encountered,
/// the function returns true to let the declaration parsing code handle it.
/// Returns false if the statement is disambiguated as expression.
bool isCXXSimpleDeclaration(bool AllowForRangeDecl);
/// isCXXFunctionDeclarator - Disambiguates between a function declarator or
/// a constructor-style initializer, when parsing declaration statements.
/// Returns true for function declarator and false for constructor-style
/// initializer. If 'warnIfAmbiguous' is true a warning will be emitted to
/// indicate that the parens were disambiguated as function declarator.
/// If during the disambiguation process a parsing error is encountered,
/// the function returns true to let the declaration parsing code handle it.
bool isCXXFunctionDeclarator(bool warnIfAmbiguous);
/// isCXXConditionDeclaration - Disambiguates between a declaration or an
/// expression for a condition of a if/switch/while/for statement.
/// If during the disambiguation process a parsing error is encountered,
/// the function returns true to let the declaration parsing code handle it.
bool isCXXConditionDeclaration();
bool isCXXTypeId(TentativeCXXTypeIdContext Context, bool &isAmbiguous);
bool isCXXTypeId(TentativeCXXTypeIdContext Context) {
bool isAmbiguous;
return isCXXTypeId(Context, isAmbiguous);
}
/// TPResult - Used as the result value for functions whose purpose is to
/// disambiguate C++ constructs by "tentatively parsing" them.
/// This is a class instead of a simple enum because the implicit enum-to-bool
/// conversions may cause subtle bugs.
class TPResult {
enum Result {
TPR_true,
TPR_false,
TPR_ambiguous,
TPR_error
};
Result Res;
TPResult(Result result) : Res(result) {}
public:
static TPResult True() { return TPR_true; }
static TPResult False() { return TPR_false; }
static TPResult Ambiguous() { return TPR_ambiguous; }
static TPResult Error() { return TPR_error; }
bool operator==(const TPResult &RHS) const { return Res == RHS.Res; }
bool operator!=(const TPResult &RHS) const { return Res != RHS.Res; }
};
/// \brief Based only on the given token kind, determine whether we know that
/// we're at the start of an expression or a type-specifier-seq (which may
/// be an expression, in C++).
///
/// This routine does not attempt to resolve any of the trick cases, e.g.,
/// those involving lookup of identifiers.
///
/// \returns \c TPR_true if this token starts an expression, \c TPR_false if
/// this token starts a type-specifier-seq, or \c TPR_ambiguous if it cannot
/// tell.
TPResult isExpressionOrTypeSpecifierSimple(tok::TokenKind Kind);
/// isCXXDeclarationSpecifier - Returns TPResult::True() if it is a
/// declaration specifier, TPResult::False() if it is not,
/// TPResult::Ambiguous() if it could be either a decl-specifier or a
/// function-style cast, and TPResult::Error() if a parsing error was
/// encountered. If it could be a braced C++11 function-style cast, returns
/// BracedCastResult.
/// Doesn't consume tokens.
TPResult
isCXXDeclarationSpecifier(TPResult BracedCastResult = TPResult::False());
// "Tentative parsing" functions, used for disambiguation. If a parsing error
// is encountered they will return TPResult::Error().
// Returning TPResult::True()/False() indicates that the ambiguity was
// resolved and tentative parsing may stop. TPResult::Ambiguous() indicates
// that more tentative parsing is necessary for disambiguation.
// They all consume tokens, so backtracking should be used after calling them.
TPResult TryParseDeclarationSpecifier();
TPResult TryParseSimpleDeclaration(bool AllowForRangeDecl);
TPResult TryParseTypeofSpecifier();
TPResult TryParseProtocolQualifiers();
TPResult TryParseInitDeclaratorList();
TPResult TryParseDeclarator(bool mayBeAbstract, bool mayHaveIdentifier=true);
TPResult TryParseParameterDeclarationClause();
TPResult TryParseFunctionDeclarator();
TPResult TryParseBracketDeclarator();
TypeResult ParseTypeName(SourceRange *Range = 0,
Declarator::TheContext Context
= Declarator::TypeNameContext,
AccessSpecifier AS = AS_none,
Decl **OwnedType = 0);
void ParseBlockId();
// Check for the start of a C++11 attribute-specifier-seq in a context where
// an attribute is not allowed.
bool CheckProhibitedCXX11Attribute() {
assert(Tok.is(tok::l_square));
if (!getLangOpts().CPlusPlus0x || NextToken().isNot(tok::l_square))
return false;
return DiagnoseProhibitedCXX11Attribute();
}
bool DiagnoseProhibitedCXX11Attribute();
void ProhibitAttributes(ParsedAttributesWithRange &attrs) {
if (!attrs.Range.isValid()) return;
DiagnoseProhibitedAttributes(attrs);
attrs.clear();
}
void DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs);
void MaybeParseGNUAttributes(Declarator &D,
LateParsedAttrList *LateAttrs = 0) {
if (Tok.is(tok::kw___attribute)) {
ParsedAttributes attrs(AttrFactory);
SourceLocation endLoc;
ParseGNUAttributes(attrs, &endLoc, LateAttrs);
D.takeAttributes(attrs, endLoc);
}
}
void MaybeParseGNUAttributes(ParsedAttributes &attrs,
SourceLocation *endLoc = 0,
LateParsedAttrList *LateAttrs = 0) {
if (Tok.is(tok::kw___attribute))
ParseGNUAttributes(attrs, endLoc, LateAttrs);
}
void ParseGNUAttributes(ParsedAttributes &attrs,
SourceLocation *endLoc = 0,
LateParsedAttrList *LateAttrs = 0);
void ParseGNUAttributeArgs(IdentifierInfo *AttrName,
SourceLocation AttrNameLoc,
ParsedAttributes &Attrs,
SourceLocation *EndLoc);
void MaybeParseCXX0XAttributes(Declarator &D) {
if (getLangOpts().CPlusPlus0x && isCXX11AttributeSpecifier()) {
ParsedAttributesWithRange attrs(AttrFactory);
SourceLocation endLoc;
ParseCXX11Attributes(attrs, &endLoc);
D.takeAttributes(attrs, endLoc);
}
}
void MaybeParseCXX0XAttributes(ParsedAttributes &attrs,
SourceLocation *endLoc = 0) {
if (getLangOpts().CPlusPlus0x && isCXX11AttributeSpecifier()) {
ParsedAttributesWithRange attrsWithRange(AttrFactory);
ParseCXX11Attributes(attrsWithRange, endLoc);
attrs.takeAllFrom(attrsWithRange);
}
}
void MaybeParseCXX0XAttributes(ParsedAttributesWithRange &attrs,
SourceLocation *endLoc = 0,
bool OuterMightBeMessageSend = false) {
if (getLangOpts().CPlusPlus0x &&
isCXX11AttributeSpecifier(false, OuterMightBeMessageSend))
ParseCXX11Attributes(attrs, endLoc);
}
void ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
SourceLocation *EndLoc = 0);
void ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
SourceLocation *EndLoc = 0);
IdentifierInfo *TryParseCXX11AttributeIdentifier(SourceLocation &Loc);
void MaybeParseMicrosoftAttributes(ParsedAttributes &attrs,
SourceLocation *endLoc = 0) {
if (getLangOpts().MicrosoftExt && Tok.is(tok::l_square))
ParseMicrosoftAttributes(attrs, endLoc);
}
void ParseMicrosoftAttributes(ParsedAttributes &attrs,
SourceLocation *endLoc = 0);
void ParseMicrosoftDeclSpec(ParsedAttributes &attrs);
void ParseMicrosoftTypeAttributes(ParsedAttributes &attrs);
void ParseBorlandTypeAttributes(ParsedAttributes &attrs);
void ParseOpenCLAttributes(ParsedAttributes &attrs);
void ParseOpenCLQualifiers(DeclSpec &DS);
VersionTuple ParseVersionTuple(SourceRange &Range);
void ParseAvailabilityAttribute(IdentifierInfo &Availability,
SourceLocation AvailabilityLoc,
ParsedAttributes &attrs,
SourceLocation *endLoc);
bool IsThreadSafetyAttribute(llvm::StringRef AttrName);
void ParseThreadSafetyAttribute(IdentifierInfo &AttrName,
SourceLocation AttrNameLoc,
ParsedAttributes &Attrs,
SourceLocation *EndLoc);
void ParseTypeofSpecifier(DeclSpec &DS);
SourceLocation ParseDecltypeSpecifier(DeclSpec &DS);
void AnnotateExistingDecltypeSpecifier(const DeclSpec &DS,
SourceLocation StartLoc,
SourceLocation EndLoc);
void ParseUnderlyingTypeSpecifier(DeclSpec &DS);
void ParseAtomicSpecifier(DeclSpec &DS);
ExprResult ParseAlignArgument(SourceLocation Start,
SourceLocation &EllipsisLoc);
void ParseAlignmentSpecifier(ParsedAttributes &Attrs,
SourceLocation *endLoc = 0);
VirtSpecifiers::Specifier isCXX0XVirtSpecifier(const Token &Tok) const;
VirtSpecifiers::Specifier isCXX0XVirtSpecifier() const {
return isCXX0XVirtSpecifier(Tok);
}
void ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS);
bool isCXX0XFinalKeyword() const;
/// DeclaratorScopeObj - RAII object used in Parser::ParseDirectDeclarator to
/// enter a new C++ declarator scope and exit it when the function is
/// finished.
class DeclaratorScopeObj {
Parser &P;
CXXScopeSpec &SS;
bool EnteredScope;
bool CreatedScope;
public:
DeclaratorScopeObj(Parser &p, CXXScopeSpec &ss)
: P(p), SS(ss), EnteredScope(false), CreatedScope(false) {}
void EnterDeclaratorScope() {
assert(!EnteredScope && "Already entered the scope!");
assert(SS.isSet() && "C++ scope was not set!");
CreatedScope = true;
P.EnterScope(0); // Not a decl scope.
if (!P.Actions.ActOnCXXEnterDeclaratorScope(P.getCurScope(), SS))
EnteredScope = true;
}
~DeclaratorScopeObj() {
if (EnteredScope) {
assert(SS.isSet() && "C++ scope was cleared ?");
P.Actions.ActOnCXXExitDeclaratorScope(P.getCurScope(), SS);
}
if (CreatedScope)
P.ExitScope();
}
};
/// ParseDeclarator - Parse and verify a newly-initialized declarator.
void ParseDeclarator(Declarator &D);
/// A function that parses a variant of direct-declarator.
typedef void (Parser::*DirectDeclParseFunction)(Declarator&);
void ParseDeclaratorInternal(Declarator &D,
DirectDeclParseFunction DirectDeclParser);
void ParseTypeQualifierListOpt(DeclSpec &DS, bool GNUAttributesAllowed = true,
bool CXX0XAttributesAllowed = true);
void ParseDirectDeclarator(Declarator &D);
void ParseParenDeclarator(Declarator &D);
void ParseFunctionDeclarator(Declarator &D,
ParsedAttributes &attrs,
BalancedDelimiterTracker &Tracker,
bool RequiresArg = false);
bool isFunctionDeclaratorIdentifierList();
void ParseFunctionDeclaratorIdentifierList(
Declarator &D,
SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo);
void ParseParameterDeclarationClause(
Declarator &D,
ParsedAttributes &attrs,
SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo,
SourceLocation &EllipsisLoc);
void ParseBracketDeclarator(Declarator &D);
//===--------------------------------------------------------------------===//
// C++ 7: Declarations [dcl.dcl]
/// The kind of attribute specifier we have found.
enum CXX11AttributeKind {
/// This is not an attribute specifier.
CAK_NotAttributeSpecifier,
/// This should be treated as an attribute-specifier.
CAK_AttributeSpecifier,
/// The next tokens are '[[', but this is not an attribute-specifier. This
/// is ill-formed by C++11 [dcl.attr.grammar]p6.
CAK_InvalidAttributeSpecifier
};
CXX11AttributeKind
isCXX11AttributeSpecifier(bool Disambiguate = false,
bool OuterMightBeMessageSend = false);
Decl *ParseNamespace(unsigned Context, SourceLocation &DeclEnd,
SourceLocation InlineLoc = SourceLocation());
void ParseInnerNamespace(std::vector<SourceLocation>& IdentLoc,
std::vector<IdentifierInfo*>& Ident,
std::vector<SourceLocation>& NamespaceLoc,
unsigned int index, SourceLocation& InlineLoc,
ParsedAttributes& attrs,
BalancedDelimiterTracker &Tracker);
Decl *ParseLinkage(ParsingDeclSpec &DS, unsigned Context);
Decl *ParseUsingDirectiveOrDeclaration(unsigned Context,
const ParsedTemplateInfo &TemplateInfo,
SourceLocation &DeclEnd,
ParsedAttributesWithRange &attrs,
Decl **OwnedType = 0);
Decl *ParseUsingDirective(unsigned Context,
SourceLocation UsingLoc,
SourceLocation &DeclEnd,
ParsedAttributes &attrs);
Decl *ParseUsingDeclaration(unsigned Context,
const ParsedTemplateInfo &TemplateInfo,
SourceLocation UsingLoc,
SourceLocation &DeclEnd,
AccessSpecifier AS = AS_none,
Decl **OwnedType = 0);
Decl *ParseStaticAssertDeclaration(SourceLocation &DeclEnd);
Decl *ParseNamespaceAlias(SourceLocation NamespaceLoc,
SourceLocation AliasLoc, IdentifierInfo *Alias,
SourceLocation &DeclEnd);
//===--------------------------------------------------------------------===//
// C++ 9: classes [class] and C structs/unions.
void ParseClassSpecifier(tok::TokenKind TagTokKind, SourceLocation TagLoc,
DeclSpec &DS, const ParsedTemplateInfo &TemplateInfo,
AccessSpecifier AS, bool EnteringContext,
DeclSpecContext DSC);
void ParseCXXMemberSpecification(SourceLocation StartLoc, unsigned TagType,
Decl *TagDecl);
ExprResult ParseCXXMemberInitializer(Decl *D, bool IsFunction,
SourceLocation &EqualLoc);
void ParseCXXClassMemberDeclaration(AccessSpecifier AS, AttributeList *Attr,
const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
ParsingDeclRAIIObject *DiagsFromTParams = 0);
void ParseConstructorInitializer(Decl *ConstructorDecl);
MemInitResult ParseMemInitializer(Decl *ConstructorDecl);
void HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo,
Decl *ThisDecl);
//===--------------------------------------------------------------------===//
// C++ 10: Derived classes [class.derived]
TypeResult ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
SourceLocation &EndLocation);
void ParseBaseClause(Decl *ClassDecl);
BaseResult ParseBaseSpecifier(Decl *ClassDecl);
AccessSpecifier getAccessSpecifierIfPresent() const;
bool ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
IdentifierInfo *Name,
SourceLocation NameLoc,
bool EnteringContext,
ParsedType ObjectType,
UnqualifiedId &Id,
bool AssumeTemplateId);
bool ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
ParsedType ObjectType,
UnqualifiedId &Result);
bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
bool AllowDestructorName,
bool AllowConstructorName,
ParsedType ObjectType,
SourceLocation& TemplateKWLoc,
UnqualifiedId &Result);
//===--------------------------------------------------------------------===//
// C++ 14: Templates [temp]
// C++ 14.1: Template Parameters [temp.param]
Decl *ParseDeclarationStartingWithTemplate(unsigned Context,
SourceLocation &DeclEnd,
AccessSpecifier AS = AS_none,
AttributeList *AccessAttrs = 0);
Decl *ParseTemplateDeclarationOrSpecialization(unsigned Context,
SourceLocation &DeclEnd,
AccessSpecifier AS,
AttributeList *AccessAttrs);
Decl *ParseSingleDeclarationAfterTemplate(
unsigned Context,
const ParsedTemplateInfo &TemplateInfo,
ParsingDeclRAIIObject &DiagsFromParams,
SourceLocation &DeclEnd,
AccessSpecifier AS=AS_none,
AttributeList *AccessAttrs = 0);
bool ParseTemplateParameters(unsigned Depth,
SmallVectorImpl<Decl*> &TemplateParams,
SourceLocation &LAngleLoc,
SourceLocation &RAngleLoc);
bool ParseTemplateParameterList(unsigned Depth,
SmallVectorImpl<Decl*> &TemplateParams);
bool isStartOfTemplateTypeParameter();
Decl *ParseTemplateParameter(unsigned Depth, unsigned Position);
Decl *ParseTypeParameter(unsigned Depth, unsigned Position);
Decl *ParseTemplateTemplateParameter(unsigned Depth, unsigned Position);
Decl *ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position);
// C++ 14.3: Template arguments [temp.arg]
typedef SmallVector<ParsedTemplateArgument, 16> TemplateArgList;
bool ParseTemplateIdAfterTemplateName(TemplateTy Template,
SourceLocation TemplateNameLoc,
const CXXScopeSpec &SS,
bool ConsumeLastToken,
SourceLocation &LAngleLoc,
TemplateArgList &TemplateArgs,
SourceLocation &RAngleLoc);
bool AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
CXXScopeSpec &SS,
SourceLocation TemplateKWLoc,
UnqualifiedId &TemplateName,
bool AllowTypeAnnotation = true);
void AnnotateTemplateIdTokenAsType();
bool IsTemplateArgumentList(unsigned Skip = 0);
bool ParseTemplateArgumentList(TemplateArgList &TemplateArgs);
ParsedTemplateArgument ParseTemplateTemplateArgument();
ParsedTemplateArgument ParseTemplateArgument();
Decl *ParseExplicitInstantiation(unsigned Context,
SourceLocation ExternLoc,
SourceLocation TemplateLoc,
SourceLocation &DeclEnd,
AccessSpecifier AS = AS_none);
//===--------------------------------------------------------------------===//
// Modules
DeclGroupPtrTy ParseModuleImport(SourceLocation AtLoc);
//===--------------------------------------------------------------------===//
// GNU G++: Type Traits [Type-Traits.html in the GCC manual]
ExprResult ParseUnaryTypeTrait();
ExprResult ParseBinaryTypeTrait();
ExprResult ParseTypeTrait();
//===--------------------------------------------------------------------===//
// Embarcadero: Arary and Expression Traits
ExprResult ParseArrayTypeTrait();
ExprResult ParseExpressionTrait();
//===--------------------------------------------------------------------===//
// Preprocessor code-completion pass-through
virtual void CodeCompleteDirective(bool InConditional);
virtual void CodeCompleteInConditionalExclusion();
virtual void CodeCompleteMacroName(bool IsDefinition);
virtual void CodeCompletePreprocessorExpression();
virtual void CodeCompleteMacroArgument(IdentifierInfo *Macro,
MacroInfo *MacroInfo,
unsigned ArgumentIndex);
virtual void CodeCompleteNaturalLanguage();
};
} // end namespace clang
#endif