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+//===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Declaration portions of the Parser interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Parse/Parser.h"
+#include "clang/Parse/ParseDiagnostic.h"
+#include "clang/Basic/OpenCL.h"
+#include "clang/Sema/Scope.h"
+#include "clang/Sema/ParsedTemplate.h"
+#include "clang/Sema/PrettyDeclStackTrace.h"
+#include "RAIIObjectsForParser.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringSwitch.h"
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// C99 6.7: Declarations.
+//===----------------------------------------------------------------------===//
+
+/// ParseTypeName
+/// type-name: [C99 6.7.6]
+/// specifier-qualifier-list abstract-declarator[opt]
+///
+/// Called type-id in C++.
+TypeResult Parser::ParseTypeName(SourceRange *Range,
+ Declarator::TheContext Context,
+ AccessSpecifier AS,
+ Decl **OwnedType) {
+ DeclSpecContext DSC = getDeclSpecContextFromDeclaratorContext(Context);
+
+ // Parse the common declaration-specifiers piece.
+ DeclSpec DS(AttrFactory);
+ ParseSpecifierQualifierList(DS, AS, DSC);
+ if (OwnedType)
+ *OwnedType = DS.isTypeSpecOwned() ? DS.getRepAsDecl() : 0;
+
+ // Parse the abstract-declarator, if present.
+ Declarator DeclaratorInfo(DS, Context);
+ ParseDeclarator(DeclaratorInfo);
+ if (Range)
+ *Range = DeclaratorInfo.getSourceRange();
+
+ if (DeclaratorInfo.isInvalidType())
+ return true;
+
+ return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
+}
+
+
+/// isAttributeLateParsed - Return true if the attribute has arguments that
+/// require late parsing.
+static bool isAttributeLateParsed(const IdentifierInfo &II) {
+ return llvm::StringSwitch<bool>(II.getName())
+#include "clang/Parse/AttrLateParsed.inc"
+ .Default(false);
+}
+
+
+/// ParseGNUAttributes - Parse a non-empty attributes list.
+///
+/// [GNU] attributes:
+/// attribute
+/// attributes attribute
+///
+/// [GNU] attribute:
+/// '__attribute__' '(' '(' attribute-list ')' ')'
+///
+/// [GNU] attribute-list:
+/// attrib
+/// attribute_list ',' attrib
+///
+/// [GNU] attrib:
+/// empty
+/// attrib-name
+/// attrib-name '(' identifier ')'
+/// attrib-name '(' identifier ',' nonempty-expr-list ')'
+/// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
+///
+/// [GNU] attrib-name:
+/// identifier
+/// typespec
+/// typequal
+/// storageclass
+///
+/// FIXME: The GCC grammar/code for this construct implies we need two
+/// token lookahead. Comment from gcc: "If they start with an identifier
+/// which is followed by a comma or close parenthesis, then the arguments
+/// start with that identifier; otherwise they are an expression list."
+///
+/// GCC does not require the ',' between attribs in an attribute-list.
+///
+/// At the moment, I am not doing 2 token lookahead. I am also unaware of
+/// any attributes that don't work (based on my limited testing). Most
+/// attributes are very simple in practice. Until we find a bug, I don't see
+/// a pressing need to implement the 2 token lookahead.
+
+void Parser::ParseGNUAttributes(ParsedAttributes &attrs,
+ SourceLocation *endLoc,
+ LateParsedAttrList *LateAttrs) {
+ assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!");
+
+ while (Tok.is(tok::kw___attribute)) {
+ ConsumeToken();
+ if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
+ "attribute")) {
+ SkipUntil(tok::r_paren, true); // skip until ) or ;
+ return;
+ }
+ if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
+ SkipUntil(tok::r_paren, true); // skip until ) or ;
+ return;
+ }
+ // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
+ while (Tok.is(tok::identifier) || isDeclarationSpecifier() ||
+ Tok.is(tok::comma)) {
+ if (Tok.is(tok::comma)) {
+ // allows for empty/non-empty attributes. ((__vector_size__(16),,,,))
+ ConsumeToken();
+ continue;
+ }
+ // we have an identifier or declaration specifier (const, int, etc.)
+ IdentifierInfo *AttrName = Tok.getIdentifierInfo();
+ SourceLocation AttrNameLoc = ConsumeToken();
+
+ if (Tok.is(tok::l_paren)) {
+ // handle "parameterized" attributes
+ if (LateAttrs && isAttributeLateParsed(*AttrName)) {
+ LateParsedAttribute *LA =
+ new LateParsedAttribute(this, *AttrName, AttrNameLoc);
+ LateAttrs->push_back(LA);
+
+ // Attributes in a class are parsed at the end of the class, along
+ // with other late-parsed declarations.
+ if (!ClassStack.empty())
+ getCurrentClass().LateParsedDeclarations.push_back(LA);
+
+ // consume everything up to and including the matching right parens
+ ConsumeAndStoreUntil(tok::r_paren, LA->Toks, true, false);
+
+ Token Eof;
+ Eof.startToken();
+ Eof.setLocation(Tok.getLocation());
+ LA->Toks.push_back(Eof);
+ } else {
+ ParseGNUAttributeArgs(AttrName, AttrNameLoc, attrs, endLoc);
+ }
+ } else {
+ attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc,
+ 0, SourceLocation(), 0, 0);
+ }
+ }
+ if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
+ SkipUntil(tok::r_paren, false);
+ SourceLocation Loc = Tok.getLocation();
+ if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) {
+ SkipUntil(tok::r_paren, false);
+ }
+ if (endLoc)
+ *endLoc = Loc;
+ }
+}
+
+
+/// Parse the arguments to a parameterized GNU attribute
+void Parser::ParseGNUAttributeArgs(IdentifierInfo *AttrName,
+ SourceLocation AttrNameLoc,
+ ParsedAttributes &Attrs,
+ SourceLocation *EndLoc) {
+
+ assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
+
+ // Availability attributes have their own grammar.
+ if (AttrName->isStr("availability")) {
+ ParseAvailabilityAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc);
+ return;
+ }
+ // Thread safety attributes fit into the FIXME case above, so we
+ // just parse the arguments as a list of expressions
+ if (IsThreadSafetyAttribute(AttrName->getName())) {
+ ParseThreadSafetyAttribute(*AttrName, AttrNameLoc, Attrs, EndLoc);
+ return;
+ }
+
+ ConsumeParen(); // ignore the left paren loc for now
+
+ IdentifierInfo *ParmName = 0;
+ SourceLocation ParmLoc;
+ bool BuiltinType = false;
+
+ switch (Tok.getKind()) {
+ case tok::kw_char:
+ case tok::kw_wchar_t:
+ case tok::kw_char16_t:
+ case tok::kw_char32_t:
+ case tok::kw_bool:
+ case tok::kw_short:
+ case tok::kw_int:
+ case tok::kw_long:
+ case tok::kw___int64:
+ case tok::kw___int128:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_void:
+ case tok::kw_typeof:
+ // __attribute__(( vec_type_hint(char) ))
+ // FIXME: Don't just discard the builtin type token.
+ ConsumeToken();
+ BuiltinType = true;
+ break;
+
+ case tok::identifier:
+ ParmName = Tok.getIdentifierInfo();
+ ParmLoc = ConsumeToken();
+ break;
+
+ default:
+ break;
+ }
+
+ ExprVector ArgExprs(Actions);
+
+ if (!BuiltinType &&
+ (ParmLoc.isValid() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren))) {
+ // Eat the comma.
+ if (ParmLoc.isValid())
+ ConsumeToken();
+
+ // Parse the non-empty comma-separated list of expressions.
+ while (1) {
+ ExprResult ArgExpr(ParseAssignmentExpression());
+ if (ArgExpr.isInvalid()) {
+ SkipUntil(tok::r_paren);
+ return;
+ }
+ ArgExprs.push_back(ArgExpr.release());
+ if (Tok.isNot(tok::comma))
+ break;
+ ConsumeToken(); // Eat the comma, move to the next argument
+ }
+ }
+ else if (Tok.is(tok::less) && AttrName->isStr("iboutletcollection")) {
+ if (!ExpectAndConsume(tok::less, diag::err_expected_less_after, "<",
+ tok::greater)) {
+ while (Tok.is(tok::identifier)) {
+ ConsumeToken();
+ if (Tok.is(tok::greater))
+ break;
+ if (Tok.is(tok::comma)) {
+ ConsumeToken();
+ continue;
+ }
+ }
+ if (Tok.isNot(tok::greater))
+ Diag(Tok, diag::err_iboutletcollection_with_protocol);
+ SkipUntil(tok::r_paren, false, true); // skip until ')'
+ }
+ }
+
+ SourceLocation RParen = Tok.getLocation();
+ if (!ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) {
+ AttributeList *attr =
+ Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0, AttrNameLoc,
+ ParmName, ParmLoc, ArgExprs.take(), ArgExprs.size());
+ if (BuiltinType && attr->getKind() == AttributeList::AT_iboutletcollection)
+ Diag(Tok, diag::err_iboutletcollection_builtintype);
+ }
+}
+
+
+/// ParseMicrosoftDeclSpec - Parse an __declspec construct
+///
+/// [MS] decl-specifier:
+/// __declspec ( extended-decl-modifier-seq )
+///
+/// [MS] extended-decl-modifier-seq:
+/// extended-decl-modifier[opt]
+/// extended-decl-modifier extended-decl-modifier-seq
+
+void Parser::ParseMicrosoftDeclSpec(ParsedAttributes &attrs) {
+ assert(Tok.is(tok::kw___declspec) && "Not a declspec!");
+
+ ConsumeToken();
+ if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
+ "declspec")) {
+ SkipUntil(tok::r_paren, true); // skip until ) or ;
+ return;
+ }
+
+ while (Tok.getIdentifierInfo()) {
+ IdentifierInfo *AttrName = Tok.getIdentifierInfo();
+ SourceLocation AttrNameLoc = ConsumeToken();
+
+ // FIXME: Remove this when we have proper __declspec(property()) support.
+ // Just skip everything inside property().
+ if (AttrName->getName() == "property") {
+ ConsumeParen();
+ SkipUntil(tok::r_paren);
+ }
+ if (Tok.is(tok::l_paren)) {
+ ConsumeParen();
+ // FIXME: This doesn't parse __declspec(property(get=get_func_name))
+ // correctly.
+ ExprResult ArgExpr(ParseAssignmentExpression());
+ if (!ArgExpr.isInvalid()) {
+ Expr *ExprList = ArgExpr.take();
+ attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
+ SourceLocation(), &ExprList, 1, true);
+ }
+ if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
+ SkipUntil(tok::r_paren, false);
+ } else {
+ attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc,
+ 0, SourceLocation(), 0, 0, true);
+ }
+ }
+ if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
+ SkipUntil(tok::r_paren, false);
+ return;
+}
+
+void Parser::ParseMicrosoftTypeAttributes(ParsedAttributes &attrs) {
+ // Treat these like attributes
+ // FIXME: Allow Sema to distinguish between these and real attributes!
+ while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) ||
+ Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___cdecl) ||
+ Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64) ||
+ Tok.is(tok::kw___ptr32) ||
+ Tok.is(tok::kw___unaligned)) {
+ IdentifierInfo *AttrName = Tok.getIdentifierInfo();
+ SourceLocation AttrNameLoc = ConsumeToken();
+ if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64) ||
+ Tok.is(tok::kw___ptr32))
+ // FIXME: Support these properly!
+ continue;
+ attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
+ SourceLocation(), 0, 0, true);
+ }
+}
+
+void Parser::ParseBorlandTypeAttributes(ParsedAttributes &attrs) {
+ // Treat these like attributes
+ while (Tok.is(tok::kw___pascal)) {
+ IdentifierInfo *AttrName = Tok.getIdentifierInfo();
+ SourceLocation AttrNameLoc = ConsumeToken();
+ attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0,
+ SourceLocation(), 0, 0, true);
+ }
+}
+
+void Parser::ParseOpenCLAttributes(ParsedAttributes &attrs) {
+ // Treat these like attributes
+ while (Tok.is(tok::kw___kernel)) {
+ SourceLocation AttrNameLoc = ConsumeToken();
+ attrs.addNew(PP.getIdentifierInfo("opencl_kernel_function"),
+ AttrNameLoc, 0, AttrNameLoc, 0,
+ SourceLocation(), 0, 0, false);
+ }
+}
+
+void Parser::ParseOpenCLQualifiers(DeclSpec &DS) {
+ SourceLocation Loc = Tok.getLocation();
+ switch(Tok.getKind()) {
+ // OpenCL qualifiers:
+ case tok::kw___private:
+ case tok::kw_private:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("address_space"), Loc, 0);
+ break;
+
+ case tok::kw___global:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_global);
+ break;
+
+ case tok::kw___local:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_local);
+ break;
+
+ case tok::kw___constant:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("address_space"), Loc, LangAS::opencl_constant);
+ break;
+
+ case tok::kw___read_only:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_only);
+ break;
+
+ case tok::kw___write_only:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_write_only);
+ break;
+
+ case tok::kw___read_write:
+ DS.getAttributes().addNewInteger(
+ Actions.getASTContext(),
+ PP.getIdentifierInfo("opencl_image_access"), Loc, CLIA_read_write);
+ break;
+ default: break;
+ }
+}
+
+/// \brief Parse a version number.
+///
+/// version:
+/// simple-integer
+/// simple-integer ',' simple-integer
+/// simple-integer ',' simple-integer ',' simple-integer
+VersionTuple Parser::ParseVersionTuple(SourceRange &Range) {
+ Range = Tok.getLocation();
+
+ if (!Tok.is(tok::numeric_constant)) {
+ Diag(Tok, diag::err_expected_version);
+ SkipUntil(tok::comma, tok::r_paren, true, true, true);
+ return VersionTuple();
+ }
+
+ // Parse the major (and possibly minor and subminor) versions, which
+ // are stored in the numeric constant. We utilize a quirk of the
+ // lexer, which is that it handles something like 1.2.3 as a single
+ // numeric constant, rather than two separate tokens.
+ SmallString<512> Buffer;
+ Buffer.resize(Tok.getLength()+1);
+ const char *ThisTokBegin = &Buffer[0];
+
+ // Get the spelling of the token, which eliminates trigraphs, etc.
+ bool Invalid = false;
+ unsigned ActualLength = PP.getSpelling(Tok, ThisTokBegin, &Invalid);
+ if (Invalid)
+ return VersionTuple();
+
+ // Parse the major version.
+ unsigned AfterMajor = 0;
+ unsigned Major = 0;
+ while (AfterMajor < ActualLength && isdigit(ThisTokBegin[AfterMajor])) {
+ Major = Major * 10 + ThisTokBegin[AfterMajor] - '0';
+ ++AfterMajor;
+ }
+
+ if (AfterMajor == 0) {
+ Diag(Tok, diag::err_expected_version);
+ SkipUntil(tok::comma, tok::r_paren, true, true, true);
+ return VersionTuple();
+ }
+
+ if (AfterMajor == ActualLength) {
+ ConsumeToken();
+
+ // We only had a single version component.
+ if (Major == 0) {
+ Diag(Tok, diag::err_zero_version);
+ return VersionTuple();
+ }
+
+ return VersionTuple(Major);
+ }
+
+ if (ThisTokBegin[AfterMajor] != '.' || (AfterMajor + 1 == ActualLength)) {
+ Diag(Tok, diag::err_expected_version);
+ SkipUntil(tok::comma, tok::r_paren, true, true, true);
+ return VersionTuple();
+ }
+
+ // Parse the minor version.
+ unsigned AfterMinor = AfterMajor + 1;
+ unsigned Minor = 0;
+ while (AfterMinor < ActualLength && isdigit(ThisTokBegin[AfterMinor])) {
+ Minor = Minor * 10 + ThisTokBegin[AfterMinor] - '0';
+ ++AfterMinor;
+ }
+
+ if (AfterMinor == ActualLength) {
+ ConsumeToken();
+
+ // We had major.minor.
+ if (Major == 0 && Minor == 0) {
+ Diag(Tok, diag::err_zero_version);
+ return VersionTuple();
+ }
+
+ return VersionTuple(Major, Minor);
+ }
+
+ // If what follows is not a '.', we have a problem.
+ if (ThisTokBegin[AfterMinor] != '.') {
+ Diag(Tok, diag::err_expected_version);
+ SkipUntil(tok::comma, tok::r_paren, true, true, true);
+ return VersionTuple();
+ }
+
+ // Parse the subminor version.
+ unsigned AfterSubminor = AfterMinor + 1;
+ unsigned Subminor = 0;
+ while (AfterSubminor < ActualLength && isdigit(ThisTokBegin[AfterSubminor])) {
+ Subminor = Subminor * 10 + ThisTokBegin[AfterSubminor] - '0';
+ ++AfterSubminor;
+ }
+
+ if (AfterSubminor != ActualLength) {
+ Diag(Tok, diag::err_expected_version);
+ SkipUntil(tok::comma, tok::r_paren, true, true, true);
+ return VersionTuple();
+ }
+ ConsumeToken();
+ return VersionTuple(Major, Minor, Subminor);
+}
+
+/// \brief Parse the contents of the "availability" attribute.
+///
+/// availability-attribute:
+/// 'availability' '(' platform ',' version-arg-list, opt-message')'
+///
+/// platform:
+/// identifier
+///
+/// version-arg-list:
+/// version-arg
+/// version-arg ',' version-arg-list
+///
+/// version-arg:
+/// 'introduced' '=' version
+/// 'deprecated' '=' version
+/// 'obsoleted' = version
+/// 'unavailable'
+/// opt-message:
+/// 'message' '=' <string>
+void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
+ SourceLocation AvailabilityLoc,
+ ParsedAttributes &attrs,
+ SourceLocation *endLoc) {
+ SourceLocation PlatformLoc;
+ IdentifierInfo *Platform = 0;
+
+ enum { Introduced, Deprecated, Obsoleted, Unknown };
+ AvailabilityChange Changes[Unknown];
+ ExprResult MessageExpr;
+
+ // Opening '('.
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ if (T.consumeOpen()) {
+ Diag(Tok, diag::err_expected_lparen);
+ return;
+ }
+
+ // Parse the platform name,
+ if (Tok.isNot(tok::identifier)) {
+ Diag(Tok, diag::err_availability_expected_platform);
+ SkipUntil(tok::r_paren);
+ return;
+ }
+ Platform = Tok.getIdentifierInfo();
+ PlatformLoc = ConsumeToken();
+
+ // Parse the ',' following the platform name.
+ if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::r_paren))
+ return;
+
+ // If we haven't grabbed the pointers for the identifiers
+ // "introduced", "deprecated", and "obsoleted", do so now.
+ if (!Ident_introduced) {
+ Ident_introduced = PP.getIdentifierInfo("introduced");
+ Ident_deprecated = PP.getIdentifierInfo("deprecated");
+ Ident_obsoleted = PP.getIdentifierInfo("obsoleted");
+ Ident_unavailable = PP.getIdentifierInfo("unavailable");
+ Ident_message = PP.getIdentifierInfo("message");
+ }
+
+ // Parse the set of introductions/deprecations/removals.
+ SourceLocation UnavailableLoc;
+ do {
+ if (Tok.isNot(tok::identifier)) {
+ Diag(Tok, diag::err_availability_expected_change);
+ SkipUntil(tok::r_paren);
+ return;
+ }
+ IdentifierInfo *Keyword = Tok.getIdentifierInfo();
+ SourceLocation KeywordLoc = ConsumeToken();
+
+ if (Keyword == Ident_unavailable) {
+ if (UnavailableLoc.isValid()) {
+ Diag(KeywordLoc, diag::err_availability_redundant)
+ << Keyword << SourceRange(UnavailableLoc);
+ }
+ UnavailableLoc = KeywordLoc;
+
+ if (Tok.isNot(tok::comma))
+ break;
+
+ ConsumeToken();
+ continue;
+ }
+
+ if (Tok.isNot(tok::equal)) {
+ Diag(Tok, diag::err_expected_equal_after)
+ << Keyword;
+ SkipUntil(tok::r_paren);
+ return;
+ }
+ ConsumeToken();
+ if (Keyword == Ident_message) {
+ if (!isTokenStringLiteral()) {
+ Diag(Tok, diag::err_expected_string_literal);
+ SkipUntil(tok::r_paren);
+ return;
+ }
+ MessageExpr = ParseStringLiteralExpression();
+ break;
+ }
+
+ SourceRange VersionRange;
+ VersionTuple Version = ParseVersionTuple(VersionRange);
+
+ if (Version.empty()) {
+ SkipUntil(tok::r_paren);
+ return;
+ }
+
+ unsigned Index;
+ if (Keyword == Ident_introduced)
+ Index = Introduced;
+ else if (Keyword == Ident_deprecated)
+ Index = Deprecated;
+ else if (Keyword == Ident_obsoleted)
+ Index = Obsoleted;
+ else
+ Index = Unknown;
+
+ if (Index < Unknown) {
+ if (!Changes[Index].KeywordLoc.isInvalid()) {
+ Diag(KeywordLoc, diag::err_availability_redundant)
+ << Keyword
+ << SourceRange(Changes[Index].KeywordLoc,
+ Changes[Index].VersionRange.getEnd());
+ }
+
+ Changes[Index].KeywordLoc = KeywordLoc;
+ Changes[Index].Version = Version;
+ Changes[Index].VersionRange = VersionRange;
+ } else {
+ Diag(KeywordLoc, diag::err_availability_unknown_change)
+ << Keyword << VersionRange;
+ }
+
+ if (Tok.isNot(tok::comma))
+ break;
+
+ ConsumeToken();
+ } while (true);
+
+ // Closing ')'.
+ if (T.consumeClose())
+ return;
+
+ if (endLoc)
+ *endLoc = T.getCloseLocation();
+
+ // The 'unavailable' availability cannot be combined with any other
+ // availability changes. Make sure that hasn't happened.
+ if (UnavailableLoc.isValid()) {
+ bool Complained = false;
+ for (unsigned Index = Introduced; Index != Unknown; ++Index) {
+ if (Changes[Index].KeywordLoc.isValid()) {
+ if (!Complained) {
+ Diag(UnavailableLoc, diag::warn_availability_and_unavailable)
+ << SourceRange(Changes[Index].KeywordLoc,
+ Changes[Index].VersionRange.getEnd());
+ Complained = true;
+ }
+
+ // Clear out the availability.
+ Changes[Index] = AvailabilityChange();
+ }
+ }
+ }
+
+ // Record this attribute
+ attrs.addNew(&Availability,
+ SourceRange(AvailabilityLoc, T.getCloseLocation()),
+ 0, AvailabilityLoc,
+ Platform, PlatformLoc,
+ Changes[Introduced],
+ Changes[Deprecated],
+ Changes[Obsoleted],
+ UnavailableLoc, MessageExpr.take(),
+ false, false);
+}
+
+
+// Late Parsed Attributes:
+// See other examples of late parsing in lib/Parse/ParseCXXInlineMethods
+
+void Parser::LateParsedDeclaration::ParseLexedAttributes() {}
+
+void Parser::LateParsedClass::ParseLexedAttributes() {
+ Self->ParseLexedAttributes(*Class);
+}
+
+void Parser::LateParsedAttribute::ParseLexedAttributes() {
+ Self->ParseLexedAttribute(*this, true, false);
+}
+
+/// Wrapper class which calls ParseLexedAttribute, after setting up the
+/// scope appropriately.
+void Parser::ParseLexedAttributes(ParsingClass &Class) {
+ // Deal with templates
+ // FIXME: Test cases to make sure this does the right thing for templates.
+ bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
+ ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
+ HasTemplateScope);
+ if (HasTemplateScope)
+ Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
+
+ // Set or update the scope flags.
+ bool AlreadyHasClassScope = Class.TopLevelClass;
+ unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
+ ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
+ ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
+
+ // Enter the scope of nested classes
+ if (!AlreadyHasClassScope)
+ Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
+ Class.TagOrTemplate);
+ {
+ // Allow 'this' within late-parsed attributes.
+ Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
+ /*TypeQuals=*/0);
+
+ for (unsigned i = 0, ni = Class.LateParsedDeclarations.size(); i < ni; ++i){
+ Class.LateParsedDeclarations[i]->ParseLexedAttributes();
+ }
+ }
+
+ if (!AlreadyHasClassScope)
+ Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
+ Class.TagOrTemplate);
+}
+
+
+/// \brief Parse all attributes in LAs, and attach them to Decl D.
+void Parser::ParseLexedAttributeList(LateParsedAttrList &LAs, Decl *D,
+ bool EnterScope, bool OnDefinition) {
+ for (unsigned i = 0, ni = LAs.size(); i < ni; ++i) {
+ LAs[i]->addDecl(D);
+ ParseLexedAttribute(*LAs[i], EnterScope, OnDefinition);
+ delete LAs[i];
+ }
+ LAs.clear();
+}
+
+
+/// \brief Finish parsing an attribute for which parsing was delayed.
+/// This will be called at the end of parsing a class declaration
+/// for each LateParsedAttribute. We consume the saved tokens and
+/// create an attribute with the arguments filled in. We add this
+/// to the Attribute list for the decl.
+void Parser::ParseLexedAttribute(LateParsedAttribute &LA,
+ bool EnterScope, bool OnDefinition) {
+ // Save the current token position.
+ SourceLocation OrigLoc = Tok.getLocation();
+
+ // Append the current token at the end of the new token stream so that it
+ // doesn't get lost.
+ LA.Toks.push_back(Tok);
+ PP.EnterTokenStream(LA.Toks.data(), LA.Toks.size(), true, false);
+ // Consume the previously pushed token.
+ ConsumeAnyToken();
+
+ if (OnDefinition && !IsThreadSafetyAttribute(LA.AttrName.getName())) {
+ Diag(Tok, diag::warn_attribute_on_function_definition)
+ << LA.AttrName.getName();
+ }
+
+ ParsedAttributes Attrs(AttrFactory);
+ SourceLocation endLoc;
+
+ if (LA.Decls.size() == 1) {
+ Decl *D = LA.Decls[0];
+
+ // If the Decl is templatized, add template parameters to scope.
+ bool HasTemplateScope = EnterScope && D->isTemplateDecl();
+ ParseScope TempScope(this, Scope::TemplateParamScope, HasTemplateScope);
+ if (HasTemplateScope)
+ Actions.ActOnReenterTemplateScope(Actions.CurScope, D);
+
+ // If the Decl is on a function, add function parameters to the scope.
+ bool HasFunctionScope = EnterScope && D->isFunctionOrFunctionTemplate();
+ ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope, HasFunctionScope);
+ if (HasFunctionScope)
+ Actions.ActOnReenterFunctionContext(Actions.CurScope, D);
+
+ ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc);
+
+ if (HasFunctionScope) {
+ Actions.ActOnExitFunctionContext();
+ FnScope.Exit(); // Pop scope, and remove Decls from IdResolver
+ }
+ if (HasTemplateScope) {
+ TempScope.Exit();
+ }
+ } else if (LA.Decls.size() > 0) {
+ // If there are multiple decls, then the decl cannot be within the
+ // function scope.
+ ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, &endLoc);
+ } else {
+ Diag(Tok, diag::warn_attribute_no_decl) << LA.AttrName.getName();
+ }
+
+ for (unsigned i = 0, ni = LA.Decls.size(); i < ni; ++i) {
+ Actions.ActOnFinishDelayedAttribute(getCurScope(), LA.Decls[i], Attrs);
+ }
+
+ if (Tok.getLocation() != OrigLoc) {
+ // Due to a parsing error, we either went over the cached tokens or
+ // there are still cached tokens left, so we skip the leftover tokens.
+ // Since this is an uncommon situation that should be avoided, use the
+ // expensive isBeforeInTranslationUnit call.
+ if (PP.getSourceManager().isBeforeInTranslationUnit(Tok.getLocation(),
+ OrigLoc))
+ while (Tok.getLocation() != OrigLoc && Tok.isNot(tok::eof))
+ ConsumeAnyToken();
+ }
+}
+
+/// \brief Wrapper around a case statement checking if AttrName is
+/// one of the thread safety attributes
+bool Parser::IsThreadSafetyAttribute(llvm::StringRef AttrName){
+ return llvm::StringSwitch<bool>(AttrName)
+ .Case("guarded_by", true)
+ .Case("guarded_var", true)
+ .Case("pt_guarded_by", true)
+ .Case("pt_guarded_var", true)
+ .Case("lockable", true)
+ .Case("scoped_lockable", true)
+ .Case("no_thread_safety_analysis", true)
+ .Case("acquired_after", true)
+ .Case("acquired_before", true)
+ .Case("exclusive_lock_function", true)
+ .Case("shared_lock_function", true)
+ .Case("exclusive_trylock_function", true)
+ .Case("shared_trylock_function", true)
+ .Case("unlock_function", true)
+ .Case("lock_returned", true)
+ .Case("locks_excluded", true)
+ .Case("exclusive_locks_required", true)
+ .Case("shared_locks_required", true)
+ .Default(false);
+}
+
+/// \brief Parse the contents of thread safety attributes. These
+/// should always be parsed as an expression list.
+///
+/// We need to special case the parsing due to the fact that if the first token
+/// of the first argument is an identifier, the main parse loop will store
+/// that token as a "parameter" and the rest of
+/// the arguments will be added to a list of "arguments". However,
+/// subsequent tokens in the first argument are lost. We instead parse each
+/// argument as an expression and add all arguments to the list of "arguments".
+/// In future, we will take advantage of this special case to also
+/// deal with some argument scoping issues here (for example, referring to a
+/// function parameter in the attribute on that function).
+void Parser::ParseThreadSafetyAttribute(IdentifierInfo &AttrName,
+ SourceLocation AttrNameLoc,
+ ParsedAttributes &Attrs,
+ SourceLocation *EndLoc) {
+ assert(Tok.is(tok::l_paren) && "Attribute arg list not starting with '('");
+
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+
+ ExprVector ArgExprs(Actions);
+ bool ArgExprsOk = true;
+
+ // now parse the list of expressions
+ while (Tok.isNot(tok::r_paren)) {
+ ExprResult ArgExpr(ParseAssignmentExpression());
+ if (ArgExpr.isInvalid()) {
+ ArgExprsOk = false;
+ T.consumeClose();
+ break;
+ } else {
+ ArgExprs.push_back(ArgExpr.release());
+ }
+ if (Tok.isNot(tok::comma))
+ break;
+ ConsumeToken(); // Eat the comma, move to the next argument
+ }
+ // Match the ')'.
+ if (ArgExprsOk && !T.consumeClose()) {
+ Attrs.addNew(&AttrName, AttrNameLoc, 0, AttrNameLoc, 0, SourceLocation(),
+ ArgExprs.take(), ArgExprs.size());
+ }
+ if (EndLoc)
+ *EndLoc = T.getCloseLocation();
+}
+
+/// DiagnoseProhibitedCXX11Attribute - We have found the opening square brackets
+/// of a C++11 attribute-specifier in a location where an attribute is not
+/// permitted. By C++11 [dcl.attr.grammar]p6, this is ill-formed. Diagnose this
+/// situation.
+///
+/// \return \c true if we skipped an attribute-like chunk of tokens, \c false if
+/// this doesn't appear to actually be an attribute-specifier, and the caller
+/// should try to parse it.
+bool Parser::DiagnoseProhibitedCXX11Attribute() {
+ assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square));
+
+ switch (isCXX11AttributeSpecifier(/*Disambiguate*/true)) {
+ case CAK_NotAttributeSpecifier:
+ // No diagnostic: we're in Obj-C++11 and this is not actually an attribute.
+ return false;
+
+ case CAK_InvalidAttributeSpecifier:
+ Diag(Tok.getLocation(), diag::err_l_square_l_square_not_attribute);
+ return false;
+
+ case CAK_AttributeSpecifier:
+ // Parse and discard the attributes.
+ SourceLocation BeginLoc = ConsumeBracket();
+ ConsumeBracket();
+ SkipUntil(tok::r_square, /*StopAtSemi*/ false);
+ assert(Tok.is(tok::r_square) && "isCXX11AttributeSpecifier lied");
+ SourceLocation EndLoc = ConsumeBracket();
+ Diag(BeginLoc, diag::err_attributes_not_allowed)
+ << SourceRange(BeginLoc, EndLoc);
+ return true;
+ }
+ llvm_unreachable("All cases handled above.");
+}
+
+void Parser::DiagnoseProhibitedAttributes(ParsedAttributesWithRange &attrs) {
+ Diag(attrs.Range.getBegin(), diag::err_attributes_not_allowed)
+ << attrs.Range;
+}
+
+/// ParseDeclaration - Parse a full 'declaration', which consists of
+/// declaration-specifiers, some number of declarators, and a semicolon.
+/// 'Context' should be a Declarator::TheContext value. This returns the
+/// location of the semicolon in DeclEnd.
+///
+/// declaration: [C99 6.7]
+/// block-declaration ->
+/// simple-declaration
+/// others [FIXME]
+/// [C++] template-declaration
+/// [C++] namespace-definition
+/// [C++] using-directive
+/// [C++] using-declaration
+/// [C++11/C11] static_assert-declaration
+/// others... [FIXME]
+///
+Parser::DeclGroupPtrTy Parser::ParseDeclaration(StmtVector &Stmts,
+ unsigned Context,
+ SourceLocation &DeclEnd,
+ ParsedAttributesWithRange &attrs) {
+ ParenBraceBracketBalancer BalancerRAIIObj(*this);
+ // Must temporarily exit the objective-c container scope for
+ // parsing c none objective-c decls.
+ ObjCDeclContextSwitch ObjCDC(*this);
+
+ Decl *SingleDecl = 0;
+ Decl *OwnedType = 0;
+ switch (Tok.getKind()) {
+ case tok::kw_template:
+ case tok::kw_export:
+ ProhibitAttributes(attrs);
+ SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
+ break;
+ case tok::kw_inline:
+ // Could be the start of an inline namespace. Allowed as an ext in C++03.
+ if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_namespace)) {
+ ProhibitAttributes(attrs);
+ SourceLocation InlineLoc = ConsumeToken();
+ SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc);
+ break;
+ }
+ return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs,
+ true);
+ case tok::kw_namespace:
+ ProhibitAttributes(attrs);
+ SingleDecl = ParseNamespace(Context, DeclEnd);
+ break;
+ case tok::kw_using:
+ SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(),
+ DeclEnd, attrs, &OwnedType);
+ break;
+ case tok::kw_static_assert:
+ case tok::kw__Static_assert:
+ ProhibitAttributes(attrs);
+ SingleDecl = ParseStaticAssertDeclaration(DeclEnd);
+ break;
+ default:
+ return ParseSimpleDeclaration(Stmts, Context, DeclEnd, attrs, true);
+ }
+
+ // This routine returns a DeclGroup, if the thing we parsed only contains a
+ // single decl, convert it now. Alias declarations can also declare a type;
+ // include that too if it is present.
+ return Actions.ConvertDeclToDeclGroup(SingleDecl, OwnedType);
+}
+
+/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
+/// declaration-specifiers init-declarator-list[opt] ';'
+///[C90/C++]init-declarator-list ';' [TODO]
+/// [OMP] threadprivate-directive [TODO]
+///
+/// for-range-declaration: [C++0x 6.5p1: stmt.ranged]
+/// attribute-specifier-seq[opt] type-specifier-seq declarator
+///
+/// If RequireSemi is false, this does not check for a ';' at the end of the
+/// declaration. If it is true, it checks for and eats it.
+///
+/// If FRI is non-null, we might be parsing a for-range-declaration instead
+/// of a simple-declaration. If we find that we are, we also parse the
+/// for-range-initializer, and place it here.
+Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(StmtVector &Stmts,
+ unsigned Context,
+ SourceLocation &DeclEnd,
+ ParsedAttributes &attrs,
+ bool RequireSemi,
+ ForRangeInit *FRI) {
+ // Parse the common declaration-specifiers piece.
+ ParsingDeclSpec DS(*this);
+ DS.takeAttributesFrom(attrs);
+
+ ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none,
+ getDeclSpecContextFromDeclaratorContext(Context));
+
+ // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
+ // declaration-specifiers init-declarator-list[opt] ';'
+ if (Tok.is(tok::semi)) {
+ if (RequireSemi) ConsumeToken();
+ Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
+ DS);
+ DS.complete(TheDecl);
+ return Actions.ConvertDeclToDeclGroup(TheDecl);
+ }
+
+ return ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, &DeclEnd, FRI);
+}
+
+/// Returns true if this might be the start of a declarator, or a common typo
+/// for a declarator.
+bool Parser::MightBeDeclarator(unsigned Context) {
+ switch (Tok.getKind()) {
+ case tok::annot_cxxscope:
+ case tok::annot_template_id:
+ case tok::caret:
+ case tok::code_completion:
+ case tok::coloncolon:
+ case tok::ellipsis:
+ case tok::kw___attribute:
+ case tok::kw_operator:
+ case tok::l_paren:
+ case tok::star:
+ return true;
+
+ case tok::amp:
+ case tok::ampamp:
+ return getLangOpts().CPlusPlus;
+
+ case tok::l_square: // Might be an attribute on an unnamed bit-field.
+ return Context == Declarator::MemberContext && getLangOpts().CPlusPlus0x &&
+ NextToken().is(tok::l_square);
+
+ case tok::colon: // Might be a typo for '::' or an unnamed bit-field.
+ return Context == Declarator::MemberContext || getLangOpts().CPlusPlus;
+
+ case tok::identifier:
+ switch (NextToken().getKind()) {
+ case tok::code_completion:
+ case tok::coloncolon:
+ case tok::comma:
+ case tok::equal:
+ case tok::equalequal: // Might be a typo for '='.
+ case tok::kw_alignas:
+ case tok::kw_asm:
+ case tok::kw___attribute:
+ case tok::l_brace:
+ case tok::l_paren:
+ case tok::l_square:
+ case tok::less:
+ case tok::r_brace:
+ case tok::r_paren:
+ case tok::r_square:
+ case tok::semi:
+ return true;
+
+ case tok::colon:
+ // At namespace scope, 'identifier:' is probably a typo for 'identifier::'
+ // and in block scope it's probably a label. Inside a class definition,
+ // this is a bit-field.
+ return Context == Declarator::MemberContext ||
+ (getLangOpts().CPlusPlus && Context == Declarator::FileContext);
+
+ case tok::identifier: // Possible virt-specifier.
+ return getLangOpts().CPlusPlus0x && isCXX0XVirtSpecifier(NextToken());
+
+ default:
+ return false;
+ }
+
+ default:
+ return false;
+ }
+}
+
+/// Skip until we reach something which seems like a sensible place to pick
+/// up parsing after a malformed declaration. This will sometimes stop sooner
+/// than SkipUntil(tok::r_brace) would, but will never stop later.
+void Parser::SkipMalformedDecl() {
+ while (true) {
+ switch (Tok.getKind()) {
+ case tok::l_brace:
+ // Skip until matching }, then stop. We've probably skipped over
+ // a malformed class or function definition or similar.
+ ConsumeBrace();
+ SkipUntil(tok::r_brace, /*StopAtSemi*/false);
+ if (Tok.is(tok::comma) || Tok.is(tok::l_brace) || Tok.is(tok::kw_try)) {
+ // This declaration isn't over yet. Keep skipping.
+ continue;
+ }
+ if (Tok.is(tok::semi))
+ ConsumeToken();
+ return;
+
+ case tok::l_square:
+ ConsumeBracket();
+ SkipUntil(tok::r_square, /*StopAtSemi*/false);
+ continue;
+
+ case tok::l_paren:
+ ConsumeParen();
+ SkipUntil(tok::r_paren, /*StopAtSemi*/false);
+ continue;
+
+ case tok::r_brace:
+ return;
+
+ case tok::semi:
+ ConsumeToken();
+ return;
+
+ case tok::kw_inline:
+ // 'inline namespace' at the start of a line is almost certainly
+ // a good place to pick back up parsing.
+ if (Tok.isAtStartOfLine() && NextToken().is(tok::kw_namespace))
+ return;
+ break;
+
+ case tok::kw_namespace:
+ // 'namespace' at the start of a line is almost certainly a good
+ // place to pick back up parsing.
+ if (Tok.isAtStartOfLine())
+ return;
+ break;
+
+ case tok::eof:
+ return;
+
+ default:
+ break;
+ }
+
+ ConsumeAnyToken();
+ }
+}
+
+/// ParseDeclGroup - Having concluded that this is either a function
+/// definition or a group of object declarations, actually parse the
+/// result.
+Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS,
+ unsigned Context,
+ bool AllowFunctionDefinitions,
+ SourceLocation *DeclEnd,
+ ForRangeInit *FRI) {
+ // Parse the first declarator.
+ ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context));
+ ParseDeclarator(D);
+
+ // Bail out if the first declarator didn't seem well-formed.
+ if (!D.hasName() && !D.mayOmitIdentifier()) {
+ SkipMalformedDecl();
+ return DeclGroupPtrTy();
+ }
+
+ // Save late-parsed attributes for now; they need to be parsed in the
+ // appropriate function scope after the function Decl has been constructed.
+ LateParsedAttrList LateParsedAttrs;
+ if (D.isFunctionDeclarator())
+ MaybeParseGNUAttributes(D, &LateParsedAttrs);
+
+ // Check to see if we have a function *definition* which must have a body.
+ if (AllowFunctionDefinitions && D.isFunctionDeclarator() &&
+ // Look at the next token to make sure that this isn't a function
+ // declaration. We have to check this because __attribute__ might be the
+ // start of a function definition in GCC-extended K&R C.
+ !isDeclarationAfterDeclarator()) {
+
+ if (isStartOfFunctionDefinition(D)) {
+ if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
+ Diag(Tok, diag::err_function_declared_typedef);
+
+ // Recover by treating the 'typedef' as spurious.
+ DS.ClearStorageClassSpecs();
+ }
+
+ Decl *TheDecl =
+ ParseFunctionDefinition(D, ParsedTemplateInfo(), &LateParsedAttrs);
+ return Actions.ConvertDeclToDeclGroup(TheDecl);
+ }
+
+ if (isDeclarationSpecifier()) {
+ // If there is an invalid declaration specifier right after the function
+ // prototype, then we must be in a missing semicolon case where this isn't
+ // actually a body. Just fall through into the code that handles it as a
+ // prototype, and let the top-level code handle the erroneous declspec
+ // where it would otherwise expect a comma or semicolon.
+ } else {
+ Diag(Tok, diag::err_expected_fn_body);
+ SkipUntil(tok::semi);
+ return DeclGroupPtrTy();
+ }
+ }
+
+ if (ParseAsmAttributesAfterDeclarator(D))
+ return DeclGroupPtrTy();
+
+ // C++0x [stmt.iter]p1: Check if we have a for-range-declarator. If so, we
+ // must parse and analyze the for-range-initializer before the declaration is
+ // analyzed.
+ if (FRI && Tok.is(tok::colon)) {
+ FRI->ColonLoc = ConsumeToken();
+ if (Tok.is(tok::l_brace))
+ FRI->RangeExpr = ParseBraceInitializer();
+ else
+ FRI->RangeExpr = ParseExpression();
+ Decl *ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
+ Actions.ActOnCXXForRangeDecl(ThisDecl);
+ Actions.FinalizeDeclaration(ThisDecl);
+ D.complete(ThisDecl);
+ return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, &ThisDecl, 1);
+ }
+
+ SmallVector<Decl *, 8> DeclsInGroup;
+ Decl *FirstDecl = ParseDeclarationAfterDeclaratorAndAttributes(D);
+ if (LateParsedAttrs.size() > 0)
+ ParseLexedAttributeList(LateParsedAttrs, FirstDecl, true, false);
+ D.complete(FirstDecl);
+ if (FirstDecl)
+ DeclsInGroup.push_back(FirstDecl);
+
+ bool ExpectSemi = Context != Declarator::ForContext;
+
+ // If we don't have a comma, it is either the end of the list (a ';') or an
+ // error, bail out.
+ while (Tok.is(tok::comma)) {
+ SourceLocation CommaLoc = ConsumeToken();
+
+ if (Tok.isAtStartOfLine() && ExpectSemi && !MightBeDeclarator(Context)) {
+ // This comma was followed by a line-break and something which can't be
+ // the start of a declarator. The comma was probably a typo for a
+ // semicolon.
+ Diag(CommaLoc, diag::err_expected_semi_declaration)
+ << FixItHint::CreateReplacement(CommaLoc, ";");
+ ExpectSemi = false;
+ break;
+ }
+
+ // Parse the next declarator.
+ D.clear();
+ D.setCommaLoc(CommaLoc);
+
+ // Accept attributes in an init-declarator. In the first declarator in a
+ // declaration, these would be part of the declspec. In subsequent
+ // declarators, they become part of the declarator itself, so that they
+ // don't apply to declarators after *this* one. Examples:
+ // short __attribute__((common)) var; -> declspec
+ // short var __attribute__((common)); -> declarator
+ // short x, __attribute__((common)) var; -> declarator
+ MaybeParseGNUAttributes(D);
+
+ ParseDeclarator(D);
+ if (!D.isInvalidType()) {
+ Decl *ThisDecl = ParseDeclarationAfterDeclarator(D);
+ D.complete(ThisDecl);
+ if (ThisDecl)
+ DeclsInGroup.push_back(ThisDecl);
+ }
+ }
+
+ if (DeclEnd)
+ *DeclEnd = Tok.getLocation();
+
+ if (ExpectSemi &&
+ ExpectAndConsume(tok::semi,
+ Context == Declarator::FileContext
+ ? diag::err_invalid_token_after_toplevel_declarator
+ : diag::err_expected_semi_declaration)) {
+ // Okay, there was no semicolon and one was expected. If we see a
+ // declaration specifier, just assume it was missing and continue parsing.
+ // Otherwise things are very confused and we skip to recover.
+ if (!isDeclarationSpecifier()) {
+ SkipUntil(tok::r_brace, true, true);
+ if (Tok.is(tok::semi))
+ ConsumeToken();
+ }
+ }
+
+ return Actions.FinalizeDeclaratorGroup(getCurScope(), DS,
+ DeclsInGroup.data(),
+ DeclsInGroup.size());
+}
+
+/// Parse an optional simple-asm-expr and attributes, and attach them to a
+/// declarator. Returns true on an error.
+bool Parser::ParseAsmAttributesAfterDeclarator(Declarator &D) {
+ // If a simple-asm-expr is present, parse it.
+ if (Tok.is(tok::kw_asm)) {
+ SourceLocation Loc;
+ ExprResult AsmLabel(ParseSimpleAsm(&Loc));
+ if (AsmLabel.isInvalid()) {
+ SkipUntil(tok::semi, true, true);
+ return true;
+ }
+
+ D.setAsmLabel(AsmLabel.release());
+ D.SetRangeEnd(Loc);
+ }
+
+ MaybeParseGNUAttributes(D);
+ return false;
+}
+
+/// \brief Parse 'declaration' after parsing 'declaration-specifiers
+/// declarator'. This method parses the remainder of the declaration
+/// (including any attributes or initializer, among other things) and
+/// finalizes the declaration.
+///
+/// init-declarator: [C99 6.7]
+/// declarator
+/// declarator '=' initializer
+/// [GNU] declarator simple-asm-expr[opt] attributes[opt]
+/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
+/// [C++] declarator initializer[opt]
+///
+/// [C++] initializer:
+/// [C++] '=' initializer-clause
+/// [C++] '(' expression-list ')'
+/// [C++0x] '=' 'default' [TODO]
+/// [C++0x] '=' 'delete'
+/// [C++0x] braced-init-list
+///
+/// According to the standard grammar, =default and =delete are function
+/// definitions, but that definitely doesn't fit with the parser here.
+///
+Decl *Parser::ParseDeclarationAfterDeclarator(Declarator &D,
+ const ParsedTemplateInfo &TemplateInfo) {
+ if (ParseAsmAttributesAfterDeclarator(D))
+ return 0;
+
+ return ParseDeclarationAfterDeclaratorAndAttributes(D, TemplateInfo);
+}
+
+Decl *Parser::ParseDeclarationAfterDeclaratorAndAttributes(Declarator &D,
+ const ParsedTemplateInfo &TemplateInfo) {
+ // Inform the current actions module that we just parsed this declarator.
+ Decl *ThisDecl = 0;
+ switch (TemplateInfo.Kind) {
+ case ParsedTemplateInfo::NonTemplate:
+ ThisDecl = Actions.ActOnDeclarator(getCurScope(), D);
+ break;
+
+ case ParsedTemplateInfo::Template:
+ case ParsedTemplateInfo::ExplicitSpecialization:
+ ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(),
+ MultiTemplateParamsArg(Actions,
+ TemplateInfo.TemplateParams->data(),
+ TemplateInfo.TemplateParams->size()),
+ D);
+ break;
+
+ case ParsedTemplateInfo::ExplicitInstantiation: {
+ DeclResult ThisRes
+ = Actions.ActOnExplicitInstantiation(getCurScope(),
+ TemplateInfo.ExternLoc,
+ TemplateInfo.TemplateLoc,
+ D);
+ if (ThisRes.isInvalid()) {
+ SkipUntil(tok::semi, true, true);
+ return 0;
+ }
+
+ ThisDecl = ThisRes.get();
+ break;
+ }
+ }
+
+ bool TypeContainsAuto =
+ D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto;
+
+ // Parse declarator '=' initializer.
+ // If a '==' or '+=' is found, suggest a fixit to '='.
+ if (isTokenEqualOrEqualTypo()) {
+ ConsumeToken();
+ if (Tok.is(tok::kw_delete)) {
+ if (D.isFunctionDeclarator())
+ Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
+ << 1 /* delete */;
+ else
+ Diag(ConsumeToken(), diag::err_deleted_non_function);
+ } else if (Tok.is(tok::kw_default)) {
+ if (D.isFunctionDeclarator())
+ Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
+ << 0 /* default */;
+ else
+ Diag(ConsumeToken(), diag::err_default_special_members);
+ } else {
+ if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
+ EnterScope(0);
+ Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
+ }
+
+ if (Tok.is(tok::code_completion)) {
+ Actions.CodeCompleteInitializer(getCurScope(), ThisDecl);
+ cutOffParsing();
+ return 0;
+ }
+
+ ExprResult Init(ParseInitializer());
+
+ if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
+ Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
+ ExitScope();
+ }
+
+ if (Init.isInvalid()) {
+ SkipUntil(tok::comma, true, true);
+ Actions.ActOnInitializerError(ThisDecl);
+ } else
+ Actions.AddInitializerToDecl(ThisDecl, Init.take(),
+ /*DirectInit=*/false, TypeContainsAuto);
+ }
+ } else if (Tok.is(tok::l_paren)) {
+ // Parse C++ direct initializer: '(' expression-list ')'
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+
+ ExprVector Exprs(Actions);
+ CommaLocsTy CommaLocs;
+
+ if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
+ EnterScope(0);
+ Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
+ }
+
+ if (ParseExpressionList(Exprs, CommaLocs)) {
+ SkipUntil(tok::r_paren);
+
+ if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
+ Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
+ ExitScope();
+ }
+ } else {
+ // Match the ')'.
+ T.consumeClose();
+
+ assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
+ "Unexpected number of commas!");
+
+ if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
+ Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
+ ExitScope();
+ }
+
+ ExprResult Initializer = Actions.ActOnParenListExpr(T.getOpenLocation(),
+ T.getCloseLocation(),
+ move_arg(Exprs));
+ Actions.AddInitializerToDecl(ThisDecl, Initializer.take(),
+ /*DirectInit=*/true, TypeContainsAuto);
+ }
+ } else if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) {
+ // Parse C++0x braced-init-list.
+ Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
+
+ if (D.getCXXScopeSpec().isSet()) {
+ EnterScope(0);
+ Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl);
+ }
+
+ ExprResult Init(ParseBraceInitializer());
+
+ if (D.getCXXScopeSpec().isSet()) {
+ Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl);
+ ExitScope();
+ }
+
+ if (Init.isInvalid()) {
+ Actions.ActOnInitializerError(ThisDecl);
+ } else
+ Actions.AddInitializerToDecl(ThisDecl, Init.take(),
+ /*DirectInit=*/true, TypeContainsAuto);
+
+ } else {
+ Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto);
+ }
+
+ Actions.FinalizeDeclaration(ThisDecl);
+
+ return ThisDecl;
+}
+
+/// ParseSpecifierQualifierList
+/// specifier-qualifier-list:
+/// type-specifier specifier-qualifier-list[opt]
+/// type-qualifier specifier-qualifier-list[opt]
+/// [GNU] attributes specifier-qualifier-list[opt]
+///
+void Parser::ParseSpecifierQualifierList(DeclSpec &DS, AccessSpecifier AS,
+ DeclSpecContext DSC) {
+ /// specifier-qualifier-list is a subset of declaration-specifiers. Just
+ /// parse declaration-specifiers and complain about extra stuff.
+ /// TODO: diagnose attribute-specifiers and alignment-specifiers.
+ ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC);
+
+ // Validate declspec for type-name.
+ unsigned Specs = DS.getParsedSpecifiers();
+ if (DSC == DSC_type_specifier && !DS.hasTypeSpecifier()) {
+ Diag(Tok, diag::err_expected_type);
+ DS.SetTypeSpecError();
+ } else if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() &&
+ !DS.hasAttributes()) {
+ Diag(Tok, diag::err_typename_requires_specqual);
+ if (!DS.hasTypeSpecifier())
+ DS.SetTypeSpecError();
+ }
+
+ // Issue diagnostic and remove storage class if present.
+ if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
+ if (DS.getStorageClassSpecLoc().isValid())
+ Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
+ else
+ Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass);
+ DS.ClearStorageClassSpecs();
+ }
+
+ // Issue diagnostic and remove function specfier if present.
+ if (Specs & DeclSpec::PQ_FunctionSpecifier) {
+ if (DS.isInlineSpecified())
+ Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
+ if (DS.isVirtualSpecified())
+ Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
+ if (DS.isExplicitSpecified())
+ Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
+ DS.ClearFunctionSpecs();
+ }
+
+ // Issue diagnostic and remove constexpr specfier if present.
+ if (DS.isConstexprSpecified()) {
+ Diag(DS.getConstexprSpecLoc(), diag::err_typename_invalid_constexpr);
+ DS.ClearConstexprSpec();
+ }
+}
+
+/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the
+/// specified token is valid after the identifier in a declarator which
+/// immediately follows the declspec. For example, these things are valid:
+///
+/// int x [ 4]; // direct-declarator
+/// int x ( int y); // direct-declarator
+/// int(int x ) // direct-declarator
+/// int x ; // simple-declaration
+/// int x = 17; // init-declarator-list
+/// int x , y; // init-declarator-list
+/// int x __asm__ ("foo"); // init-declarator-list
+/// int x : 4; // struct-declarator
+/// int x { 5}; // C++'0x unified initializers
+///
+/// This is not, because 'x' does not immediately follow the declspec (though
+/// ')' happens to be valid anyway).
+/// int (x)
+///
+static bool isValidAfterIdentifierInDeclarator(const Token &T) {
+ return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) ||
+ T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) ||
+ T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon);
+}
+
+
+/// ParseImplicitInt - This method is called when we have an non-typename
+/// identifier in a declspec (which normally terminates the decl spec) when
+/// the declspec has no type specifier. In this case, the declspec is either
+/// malformed or is "implicit int" (in K&R and C89).
+///
+/// This method handles diagnosing this prettily and returns false if the
+/// declspec is done being processed. If it recovers and thinks there may be
+/// other pieces of declspec after it, it returns true.
+///
+bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
+ const ParsedTemplateInfo &TemplateInfo,
+ AccessSpecifier AS, DeclSpecContext DSC) {
+ assert(Tok.is(tok::identifier) && "should have identifier");
+
+ SourceLocation Loc = Tok.getLocation();
+ // If we see an identifier that is not a type name, we normally would
+ // parse it as the identifer being declared. However, when a typename
+ // is typo'd or the definition is not included, this will incorrectly
+ // parse the typename as the identifier name and fall over misparsing
+ // later parts of the diagnostic.
+ //
+ // As such, we try to do some look-ahead in cases where this would
+ // otherwise be an "implicit-int" case to see if this is invalid. For
+ // example: "static foo_t x = 4;" In this case, if we parsed foo_t as
+ // an identifier with implicit int, we'd get a parse error because the
+ // next token is obviously invalid for a type. Parse these as a case
+ // with an invalid type specifier.
+ assert(!DS.hasTypeSpecifier() && "Type specifier checked above");
+
+ // Since we know that this either implicit int (which is rare) or an
+ // error, do lookahead to try to do better recovery. This never applies within
+ // a type specifier.
+ // FIXME: Don't bail out here in languages with no implicit int (like
+ // C++ with no -fms-extensions). This is much more likely to be an undeclared
+ // type or typo than a use of implicit int.
+ if (DSC != DSC_type_specifier &&
+ isValidAfterIdentifierInDeclarator(NextToken())) {
+ // If this token is valid for implicit int, e.g. "static x = 4", then
+ // we just avoid eating the identifier, so it will be parsed as the
+ // identifier in the declarator.
+ return false;
+ }
+
+ // Otherwise, if we don't consume this token, we are going to emit an
+ // error anyway. Try to recover from various common problems. Check
+ // to see if this was a reference to a tag name without a tag specified.
+ // This is a common problem in C (saying 'foo' instead of 'struct foo').
+ //
+ // C++ doesn't need this, and isTagName doesn't take SS.
+ if (SS == 0) {
+ const char *TagName = 0, *FixitTagName = 0;
+ tok::TokenKind TagKind = tok::unknown;
+
+ switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) {
+ default: break;
+ case DeclSpec::TST_enum:
+ TagName="enum" ; FixitTagName = "enum " ; TagKind=tok::kw_enum ;break;
+ case DeclSpec::TST_union:
+ TagName="union" ; FixitTagName = "union " ;TagKind=tok::kw_union ;break;
+ case DeclSpec::TST_struct:
+ TagName="struct"; FixitTagName = "struct ";TagKind=tok::kw_struct;break;
+ case DeclSpec::TST_class:
+ TagName="class" ; FixitTagName = "class " ;TagKind=tok::kw_class ;break;
+ }
+
+ if (TagName) {
+ Diag(Loc, diag::err_use_of_tag_name_without_tag)
+ << Tok.getIdentifierInfo() << TagName << getLangOpts().CPlusPlus
+ << FixItHint::CreateInsertion(Tok.getLocation(),FixitTagName);
+
+ // Parse this as a tag as if the missing tag were present.
+ if (TagKind == tok::kw_enum)
+ ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSC_normal);
+ else
+ ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS,
+ /*EnteringContext*/ false, DSC_normal);
+ return true;
+ }
+ }
+
+ // This is almost certainly an invalid type name. Let the action emit a
+ // diagnostic and attempt to recover.
+ ParsedType T;
+ if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc,
+ getCurScope(), SS, T)) {
+ // The action emitted a diagnostic, so we don't have to.
+ if (T) {
+ // The action has suggested that the type T could be used. Set that as
+ // the type in the declaration specifiers, consume the would-be type
+ // name token, and we're done.
+ const char *PrevSpec;
+ unsigned DiagID;
+ DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T);
+ DS.SetRangeEnd(Tok.getLocation());
+ ConsumeToken();
+
+ // There may be other declaration specifiers after this.
+ return true;
+ }
+
+ // Fall through; the action had no suggestion for us.
+ } else {
+ // The action did not emit a diagnostic, so emit one now.
+ SourceRange R;
+ if (SS) R = SS->getRange();
+ Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R;
+ }
+
+ // Mark this as an error.
+ DS.SetTypeSpecError();
+ DS.SetRangeEnd(Tok.getLocation());
+ ConsumeToken();
+
+ // TODO: Could inject an invalid typedef decl in an enclosing scope to
+ // avoid rippling error messages on subsequent uses of the same type,
+ // could be useful if #include was forgotten.
+ return false;
+}
+
+/// \brief Determine the declaration specifier context from the declarator
+/// context.
+///
+/// \param Context the declarator context, which is one of the
+/// Declarator::TheContext enumerator values.
+Parser::DeclSpecContext
+Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) {
+ if (Context == Declarator::MemberContext)
+ return DSC_class;
+ if (Context == Declarator::FileContext)
+ return DSC_top_level;
+ if (Context == Declarator::TrailingReturnContext)
+ return DSC_trailing;
+ return DSC_normal;
+}
+
+/// ParseAlignArgument - Parse the argument to an alignment-specifier.
+///
+/// FIXME: Simply returns an alignof() expression if the argument is a
+/// type. Ideally, the type should be propagated directly into Sema.
+///
+/// [C11] type-id
+/// [C11] constant-expression
+/// [C++0x] type-id ...[opt]
+/// [C++0x] assignment-expression ...[opt]
+ExprResult Parser::ParseAlignArgument(SourceLocation Start,
+ SourceLocation &EllipsisLoc) {
+ ExprResult ER;
+ if (isTypeIdInParens()) {
+ SourceLocation TypeLoc = Tok.getLocation();
+ ParsedType Ty = ParseTypeName().get();
+ SourceRange TypeRange(Start, Tok.getLocation());
+ ER = Actions.ActOnUnaryExprOrTypeTraitExpr(TypeLoc, UETT_AlignOf, true,
+ Ty.getAsOpaquePtr(), TypeRange);
+ } else
+ ER = ParseConstantExpression();
+
+ if (getLangOpts().CPlusPlus0x && Tok.is(tok::ellipsis))
+ EllipsisLoc = ConsumeToken();
+
+ return ER;
+}
+
+/// ParseAlignmentSpecifier - Parse an alignment-specifier, and add the
+/// attribute to Attrs.
+///
+/// alignment-specifier:
+/// [C11] '_Alignas' '(' type-id ')'
+/// [C11] '_Alignas' '(' constant-expression ')'
+/// [C++0x] 'alignas' '(' type-id ...[opt] ')'
+/// [C++0x] 'alignas' '(' assignment-expression ...[opt] ')'
+void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
+ SourceLocation *endLoc) {
+ assert((Tok.is(tok::kw_alignas) || Tok.is(tok::kw__Alignas)) &&
+ "Not an alignment-specifier!");
+
+ SourceLocation KWLoc = Tok.getLocation();
+ ConsumeToken();
+
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ if (T.expectAndConsume(diag::err_expected_lparen))
+ return;
+
+ SourceLocation EllipsisLoc;
+ ExprResult ArgExpr = ParseAlignArgument(T.getOpenLocation(), EllipsisLoc);
+ if (ArgExpr.isInvalid()) {
+ SkipUntil(tok::r_paren);
+ return;
+ }
+
+ T.consumeClose();
+ if (endLoc)
+ *endLoc = T.getCloseLocation();
+
+ // FIXME: Handle pack-expansions here.
+ if (EllipsisLoc.isValid()) {
+ Diag(EllipsisLoc, diag::err_alignas_pack_exp_unsupported);
+ return;
+ }
+
+ ExprVector ArgExprs(Actions);
+ ArgExprs.push_back(ArgExpr.release());
+ Attrs.addNew(PP.getIdentifierInfo("aligned"), KWLoc, 0, KWLoc,
+ 0, T.getOpenLocation(), ArgExprs.take(), 1, false, true);
+}
+
+/// ParseDeclarationSpecifiers
+/// declaration-specifiers: [C99 6.7]
+/// storage-class-specifier declaration-specifiers[opt]
+/// type-specifier declaration-specifiers[opt]
+/// [C99] function-specifier declaration-specifiers[opt]
+/// [C11] alignment-specifier declaration-specifiers[opt]
+/// [GNU] attributes declaration-specifiers[opt]
+/// [Clang] '__module_private__' declaration-specifiers[opt]
+///
+/// storage-class-specifier: [C99 6.7.1]
+/// 'typedef'
+/// 'extern'
+/// 'static'
+/// 'auto'
+/// 'register'
+/// [C++] 'mutable'
+/// [GNU] '__thread'
+/// function-specifier: [C99 6.7.4]
+/// [C99] 'inline'
+/// [C++] 'virtual'
+/// [C++] 'explicit'
+/// [OpenCL] '__kernel'
+/// 'friend': [C++ dcl.friend]
+/// 'constexpr': [C++0x dcl.constexpr]
+
+///
+void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
+ const ParsedTemplateInfo &TemplateInfo,
+ AccessSpecifier AS,
+ DeclSpecContext DSContext,
+ LateParsedAttrList *LateAttrs) {
+ if (DS.getSourceRange().isInvalid()) {
+ DS.SetRangeStart(Tok.getLocation());
+ DS.SetRangeEnd(Tok.getLocation());
+ }
+
+ bool EnteringContext = (DSContext == DSC_class || DSContext == DSC_top_level);
+ while (1) {
+ bool isInvalid = false;
+ const char *PrevSpec = 0;
+ unsigned DiagID = 0;
+
+ SourceLocation Loc = Tok.getLocation();
+
+ switch (Tok.getKind()) {
+ default:
+ DoneWithDeclSpec:
+ // [C++0x] decl-specifier-seq: decl-specifier attribute-specifier-seq[opt]
+ MaybeParseCXX0XAttributes(DS.getAttributes());
+
+ // If this is not a declaration specifier token, we're done reading decl
+ // specifiers. First verify that DeclSpec's are consistent.
+ DS.Finish(Diags, PP);
+ return;
+
+ case tok::code_completion: {
+ Sema::ParserCompletionContext CCC = Sema::PCC_Namespace;
+ if (DS.hasTypeSpecifier()) {
+ bool AllowNonIdentifiers
+ = (getCurScope()->getFlags() & (Scope::ControlScope |
+ Scope::BlockScope |
+ Scope::TemplateParamScope |
+ Scope::FunctionPrototypeScope |
+ Scope::AtCatchScope)) == 0;
+ bool AllowNestedNameSpecifiers
+ = DSContext == DSC_top_level ||
+ (DSContext == DSC_class && DS.isFriendSpecified());
+
+ Actions.CodeCompleteDeclSpec(getCurScope(), DS,
+ AllowNonIdentifiers,
+ AllowNestedNameSpecifiers);
+ return cutOffParsing();
+ }
+
+ if (getCurScope()->getFnParent() || getCurScope()->getBlockParent())
+ CCC = Sema::PCC_LocalDeclarationSpecifiers;
+ else if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate)
+ CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate
+ : Sema::PCC_Template;
+ else if (DSContext == DSC_class)
+ CCC = Sema::PCC_Class;
+ else if (CurParsedObjCImpl)
+ CCC = Sema::PCC_ObjCImplementation;
+
+ Actions.CodeCompleteOrdinaryName(getCurScope(), CCC);
+ return cutOffParsing();
+ }
+
+ case tok::coloncolon: // ::foo::bar
+ // C++ scope specifier. Annotate and loop, or bail out on error.
+ if (TryAnnotateCXXScopeToken(true)) {
+ if (!DS.hasTypeSpecifier())
+ DS.SetTypeSpecError();
+ goto DoneWithDeclSpec;
+ }
+ if (Tok.is(tok::coloncolon)) // ::new or ::delete
+ goto DoneWithDeclSpec;
+ continue;
+
+ case tok::annot_cxxscope: {
+ if (DS.hasTypeSpecifier())
+ goto DoneWithDeclSpec;
+
+ CXXScopeSpec SS;
+ Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
+ Tok.getAnnotationRange(),
+ SS);
+
+ // We are looking for a qualified typename.
+ Token Next = NextToken();
+ if (Next.is(tok::annot_template_id) &&
+ static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue())
+ ->Kind == TNK_Type_template) {
+ // We have a qualified template-id, e.g., N::A<int>
+
+ // C++ [class.qual]p2:
+ // In a lookup in which the constructor is an acceptable lookup
+ // result and the nested-name-specifier nominates a class C:
+ //
+ // - if the name specified after the
+ // nested-name-specifier, when looked up in C, is the
+ // injected-class-name of C (Clause 9), or
+ //
+ // - if the name specified after the nested-name-specifier
+ // is the same as the identifier or the
+ // simple-template-id's template-name in the last
+ // component of the nested-name-specifier,
+ //
+ // the name is instead considered to name the constructor of
+ // class C.
+ //
+ // Thus, if the template-name is actually the constructor
+ // name, then the code is ill-formed; this interpretation is
+ // reinforced by the NAD status of core issue 635.
+ TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
+ if ((DSContext == DSC_top_level ||
+ (DSContext == DSC_class && DS.isFriendSpecified())) &&
+ TemplateId->Name &&
+ Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
+ if (isConstructorDeclarator()) {
+ // The user meant this to be an out-of-line constructor
+ // definition, but template arguments are not allowed
+ // there. Just allow this as a constructor; we'll
+ // complain about it later.
+ goto DoneWithDeclSpec;
+ }
+
+ // The user meant this to name a type, but it actually names
+ // a constructor with some extraneous template
+ // arguments. Complain, then parse it as a type as the user
+ // intended.
+ Diag(TemplateId->TemplateNameLoc,
+ diag::err_out_of_line_template_id_names_constructor)
+ << TemplateId->Name;
+ }
+
+ DS.getTypeSpecScope() = SS;
+ ConsumeToken(); // The C++ scope.
+ assert(Tok.is(tok::annot_template_id) &&
+ "ParseOptionalCXXScopeSpecifier not working");
+ AnnotateTemplateIdTokenAsType();
+ continue;
+ }
+
+ if (Next.is(tok::annot_typename)) {
+ DS.getTypeSpecScope() = SS;
+ ConsumeToken(); // The C++ scope.
+ if (Tok.getAnnotationValue()) {
+ ParsedType T = getTypeAnnotation(Tok);
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename,
+ Tok.getAnnotationEndLoc(),
+ PrevSpec, DiagID, T);
+ }
+ else
+ DS.SetTypeSpecError();
+ DS.SetRangeEnd(Tok.getAnnotationEndLoc());
+ ConsumeToken(); // The typename
+ }
+
+ if (Next.isNot(tok::identifier))
+ goto DoneWithDeclSpec;
+
+ // If we're in a context where the identifier could be a class name,
+ // check whether this is a constructor declaration.
+ if ((DSContext == DSC_top_level ||
+ (DSContext == DSC_class && DS.isFriendSpecified())) &&
+ Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(),
+ &SS)) {
+ if (isConstructorDeclarator())
+ goto DoneWithDeclSpec;
+
+ // As noted in C++ [class.qual]p2 (cited above), when the name
+ // of the class is qualified in a context where it could name
+ // a constructor, its a constructor name. However, we've
+ // looked at the declarator, and the user probably meant this
+ // to be a type. Complain that it isn't supposed to be treated
+ // as a type, then proceed to parse it as a type.
+ Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor)
+ << Next.getIdentifierInfo();
+ }
+
+ ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(),
+ Next.getLocation(),
+ getCurScope(), &SS,
+ false, false, ParsedType(),
+ /*IsCtorOrDtorName=*/false,
+ /*NonTrivialSourceInfo=*/true);
+
+ // If the referenced identifier is not a type, then this declspec is
+ // erroneous: We already checked about that it has no type specifier, and
+ // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the
+ // typename.
+ if (TypeRep == 0) {
+ ConsumeToken(); // Eat the scope spec so the identifier is current.
+ if (ParseImplicitInt(DS, &SS, TemplateInfo, AS, DSContext)) continue;
+ goto DoneWithDeclSpec;
+ }
+
+ DS.getTypeSpecScope() = SS;
+ ConsumeToken(); // The C++ scope.
+
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
+ DiagID, TypeRep);
+ if (isInvalid)
+ break;
+
+ DS.SetRangeEnd(Tok.getLocation());
+ ConsumeToken(); // The typename.
+
+ continue;
+ }
+
+ case tok::annot_typename: {
+ if (Tok.getAnnotationValue()) {
+ ParsedType T = getTypeAnnotation(Tok);
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
+ DiagID, T);
+ } else
+ DS.SetTypeSpecError();
+
+ if (isInvalid)
+ break;
+
+ DS.SetRangeEnd(Tok.getAnnotationEndLoc());
+ ConsumeToken(); // The typename
+
+ // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
+ // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
+ // Objective-C interface.
+ if (Tok.is(tok::less) && getLangOpts().ObjC1)
+ ParseObjCProtocolQualifiers(DS);
+
+ continue;
+ }
+
+ case tok::kw___is_signed:
+ // GNU libstdc++ 4.4 uses __is_signed as an identifier, but Clang
+ // typically treats it as a trait. If we see __is_signed as it appears
+ // in libstdc++, e.g.,
+ //
+ // static const bool __is_signed;
+ //
+ // then treat __is_signed as an identifier rather than as a keyword.
+ if (DS.getTypeSpecType() == TST_bool &&
+ DS.getTypeQualifiers() == DeclSpec::TQ_const &&
+ DS.getStorageClassSpec() == DeclSpec::SCS_static) {
+ Tok.getIdentifierInfo()->RevertTokenIDToIdentifier();
+ Tok.setKind(tok::identifier);
+ }
+
+ // We're done with the declaration-specifiers.
+ goto DoneWithDeclSpec;
+
+ // typedef-name
+ case tok::kw_decltype:
+ case tok::identifier: {
+ // In C++, check to see if this is a scope specifier like foo::bar::, if
+ // so handle it as such. This is important for ctor parsing.
+ if (getLangOpts().CPlusPlus) {
+ if (TryAnnotateCXXScopeToken(true)) {
+ if (!DS.hasTypeSpecifier())
+ DS.SetTypeSpecError();
+ goto DoneWithDeclSpec;
+ }
+ if (!Tok.is(tok::identifier))
+ continue;
+ }
+
+ // This identifier can only be a typedef name if we haven't already seen
+ // a type-specifier. Without this check we misparse:
+ // typedef int X; struct Y { short X; }; as 'short int'.
+ if (DS.hasTypeSpecifier())
+ goto DoneWithDeclSpec;
+
+ // Check for need to substitute AltiVec keyword tokens.
+ if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid))
+ break;
+
+ ParsedType TypeRep =
+ Actions.getTypeName(*Tok.getIdentifierInfo(),
+ Tok.getLocation(), getCurScope());
+
+ // If this is not a typedef name, don't parse it as part of the declspec,
+ // it must be an implicit int or an error.
+ if (!TypeRep) {
+ if (ParseImplicitInt(DS, 0, TemplateInfo, AS, DSContext)) continue;
+ goto DoneWithDeclSpec;
+ }
+
+ // If we're in a context where the identifier could be a class name,
+ // check whether this is a constructor declaration.
+ if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
+ Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) &&
+ isConstructorDeclarator())
+ goto DoneWithDeclSpec;
+
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec,
+ DiagID, TypeRep);
+ if (isInvalid)
+ break;
+
+ DS.SetRangeEnd(Tok.getLocation());
+ ConsumeToken(); // The identifier
+
+ // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
+ // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
+ // Objective-C interface.
+ if (Tok.is(tok::less) && getLangOpts().ObjC1)
+ ParseObjCProtocolQualifiers(DS);
+
+ // Need to support trailing type qualifiers (e.g. "id<p> const").
+ // If a type specifier follows, it will be diagnosed elsewhere.
+ continue;
+ }
+
+ // type-name
+ case tok::annot_template_id: {
+ TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
+ if (TemplateId->Kind != TNK_Type_template) {
+ // This template-id does not refer to a type name, so we're
+ // done with the type-specifiers.
+ goto DoneWithDeclSpec;
+ }
+
+ // If we're in a context where the template-id could be a
+ // constructor name or specialization, check whether this is a
+ // constructor declaration.
+ if (getLangOpts().CPlusPlus && DSContext == DSC_class &&
+ Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) &&
+ isConstructorDeclarator())
+ goto DoneWithDeclSpec;
+
+ // Turn the template-id annotation token into a type annotation
+ // token, then try again to parse it as a type-specifier.
+ AnnotateTemplateIdTokenAsType();
+ continue;
+ }
+
+ // GNU attributes support.
+ case tok::kw___attribute:
+ ParseGNUAttributes(DS.getAttributes(), 0, LateAttrs);
+ continue;
+
+ // Microsoft declspec support.
+ case tok::kw___declspec:
+ ParseMicrosoftDeclSpec(DS.getAttributes());
+ continue;
+
+ // Microsoft single token adornments.
+ case tok::kw___forceinline:
+ // FIXME: Add handling here!
+ break;
+
+ case tok::kw___ptr64:
+ case tok::kw___ptr32:
+ case tok::kw___w64:
+ case tok::kw___cdecl:
+ case tok::kw___stdcall:
+ case tok::kw___fastcall:
+ case tok::kw___thiscall:
+ case tok::kw___unaligned:
+ ParseMicrosoftTypeAttributes(DS.getAttributes());
+ continue;
+
+ // Borland single token adornments.
+ case tok::kw___pascal:
+ ParseBorlandTypeAttributes(DS.getAttributes());
+ continue;
+
+ // OpenCL single token adornments.
+ case tok::kw___kernel:
+ ParseOpenCLAttributes(DS.getAttributes());
+ continue;
+
+ // storage-class-specifier
+ case tok::kw_typedef:
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_typedef, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw_extern:
+ if (DS.isThreadSpecified())
+ Diag(Tok, diag::ext_thread_before) << "extern";
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_extern, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw___private_extern__:
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_private_extern,
+ Loc, PrevSpec, DiagID);
+ break;
+ case tok::kw_static:
+ if (DS.isThreadSpecified())
+ Diag(Tok, diag::ext_thread_before) << "static";
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_static, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw_auto:
+ if (getLangOpts().CPlusPlus0x) {
+ if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
+ PrevSpec, DiagID);
+ if (!isInvalid)
+ Diag(Tok, diag::ext_auto_storage_class)
+ << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
+ } else
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
+ DiagID);
+ } else
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_auto, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw_register:
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_register, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw_mutable:
+ isInvalid = DS.SetStorageClassSpec(Actions, DeclSpec::SCS_mutable, Loc,
+ PrevSpec, DiagID);
+ break;
+ case tok::kw___thread:
+ isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID);
+ break;
+
+ // function-specifier
+ case tok::kw_inline:
+ isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID);
+ break;
+ case tok::kw_virtual:
+ isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID);
+ break;
+ case tok::kw_explicit:
+ isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID);
+ break;
+
+ // alignment-specifier
+ case tok::kw__Alignas:
+ if (!getLangOpts().C11)
+ Diag(Tok, diag::ext_c11_alignas);
+ ParseAlignmentSpecifier(DS.getAttributes());
+ continue;
+
+ // friend
+ case tok::kw_friend:
+ if (DSContext == DSC_class)
+ isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID);
+ else {
+ PrevSpec = ""; // not actually used by the diagnostic
+ DiagID = diag::err_friend_invalid_in_context;
+ isInvalid = true;
+ }
+ break;
+
+ // Modules
+ case tok::kw___module_private__:
+ isInvalid = DS.setModulePrivateSpec(Loc, PrevSpec, DiagID);
+ break;
+
+ // constexpr
+ case tok::kw_constexpr:
+ isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID);
+ break;
+
+ // type-specifier
+ case tok::kw_short:
+ isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_long:
+ if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
+ isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec,
+ DiagID);
+ else
+ isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw___int64:
+ isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_signed:
+ isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_unsigned:
+ isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw__Complex:
+ isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw__Imaginary:
+ isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_void:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_char:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_int:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw___int128:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_half:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_float:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_double:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_wchar_t:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_char16_t:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_char32_t:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw_bool:
+ case tok::kw__Bool:
+ if (Tok.is(tok::kw_bool) &&
+ DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
+ DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
+ PrevSpec = ""; // Not used by the diagnostic.
+ DiagID = diag::err_bool_redeclaration;
+ // For better error recovery.
+ Tok.setKind(tok::identifier);
+ isInvalid = true;
+ } else {
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec,
+ DiagID);
+ }
+ break;
+ case tok::kw__Decimal32:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw__Decimal64:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw__Decimal128:
+ isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec,
+ DiagID);
+ break;
+ case tok::kw___vector:
+ isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
+ break;
+ case tok::kw___pixel:
+ isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID);
+ break;
+ case tok::kw___unknown_anytype:
+ isInvalid = DS.SetTypeSpecType(TST_unknown_anytype, Loc,
+ PrevSpec, DiagID);
+ break;
+
+ // class-specifier:
+ case tok::kw_class:
+ case tok::kw_struct:
+ case tok::kw_union: {
+ tok::TokenKind Kind = Tok.getKind();
+ ConsumeToken();
+ ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS,
+ EnteringContext, DSContext);
+ continue;
+ }
+
+ // enum-specifier:
+ case tok::kw_enum:
+ ConsumeToken();
+ ParseEnumSpecifier(Loc, DS, TemplateInfo, AS, DSContext);
+ continue;
+
+ // cv-qualifier:
+ case tok::kw_const:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+ case tok::kw_volatile:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+ case tok::kw_restrict:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+
+ // C++ typename-specifier:
+ case tok::kw_typename:
+ if (TryAnnotateTypeOrScopeToken()) {
+ DS.SetTypeSpecError();
+ goto DoneWithDeclSpec;
+ }
+ if (!Tok.is(tok::kw_typename))
+ continue;
+ break;
+
+ // GNU typeof support.
+ case tok::kw_typeof:
+ ParseTypeofSpecifier(DS);
+ continue;
+
+ case tok::annot_decltype:
+ ParseDecltypeSpecifier(DS);
+ continue;
+
+ case tok::kw___underlying_type:
+ ParseUnderlyingTypeSpecifier(DS);
+ continue;
+
+ case tok::kw__Atomic:
+ ParseAtomicSpecifier(DS);
+ continue;
+
+ // OpenCL qualifiers:
+ case tok::kw_private:
+ if (!getLangOpts().OpenCL)
+ goto DoneWithDeclSpec;
+ case tok::kw___private:
+ case tok::kw___global:
+ case tok::kw___local:
+ case tok::kw___constant:
+ case tok::kw___read_only:
+ case tok::kw___write_only:
+ case tok::kw___read_write:
+ ParseOpenCLQualifiers(DS);
+ break;
+
+ case tok::less:
+ // GCC ObjC supports types like "<SomeProtocol>" as a synonym for
+ // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
+ // but we support it.
+ if (DS.hasTypeSpecifier() || !getLangOpts().ObjC1)
+ goto DoneWithDeclSpec;
+
+ if (!ParseObjCProtocolQualifiers(DS))
+ Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
+ << FixItHint::CreateInsertion(Loc, "id")
+ << SourceRange(Loc, DS.getSourceRange().getEnd());
+
+ // Need to support trailing type qualifiers (e.g. "id<p> const").
+ // If a type specifier follows, it will be diagnosed elsewhere.
+ continue;
+ }
+ // If the specifier wasn't legal, issue a diagnostic.
+ if (isInvalid) {
+ assert(PrevSpec && "Method did not return previous specifier!");
+ assert(DiagID);
+
+ if (DiagID == diag::ext_duplicate_declspec)
+ Diag(Tok, DiagID)
+ << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation());
+ else
+ Diag(Tok, DiagID) << PrevSpec;
+ }
+
+ DS.SetRangeEnd(Tok.getLocation());
+ if (DiagID != diag::err_bool_redeclaration)
+ ConsumeToken();
+ }
+}
+
+/// ParseStructDeclaration - Parse a struct declaration without the terminating
+/// semicolon.
+///
+/// struct-declaration:
+/// specifier-qualifier-list struct-declarator-list
+/// [GNU] __extension__ struct-declaration
+/// [GNU] specifier-qualifier-list
+/// struct-declarator-list:
+/// struct-declarator
+/// struct-declarator-list ',' struct-declarator
+/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
+/// struct-declarator:
+/// declarator
+/// [GNU] declarator attributes[opt]
+/// declarator[opt] ':' constant-expression
+/// [GNU] declarator[opt] ':' constant-expression attributes[opt]
+///
+void Parser::
+ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) {
+
+ if (Tok.is(tok::kw___extension__)) {
+ // __extension__ silences extension warnings in the subexpression.
+ ExtensionRAIIObject O(Diags); // Use RAII to do this.
+ ConsumeToken();
+ return ParseStructDeclaration(DS, Fields);
+ }
+
+ // Parse the common specifier-qualifiers-list piece.
+ ParseSpecifierQualifierList(DS);
+
+ // If there are no declarators, this is a free-standing declaration
+ // specifier. Let the actions module cope with it.
+ if (Tok.is(tok::semi)) {
+ Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, DS);
+ return;
+ }
+
+ // Read struct-declarators until we find the semicolon.
+ bool FirstDeclarator = true;
+ SourceLocation CommaLoc;
+ while (1) {
+ ParsingDeclRAIIObject PD(*this);
+ FieldDeclarator DeclaratorInfo(DS);
+ DeclaratorInfo.D.setCommaLoc(CommaLoc);
+
+ // Attributes are only allowed here on successive declarators.
+ if (!FirstDeclarator)
+ MaybeParseGNUAttributes(DeclaratorInfo.D);
+
+ /// struct-declarator: declarator
+ /// struct-declarator: declarator[opt] ':' constant-expression
+ if (Tok.isNot(tok::colon)) {
+ // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
+ ColonProtectionRAIIObject X(*this);
+ ParseDeclarator(DeclaratorInfo.D);
+ }
+
+ if (Tok.is(tok::colon)) {
+ ConsumeToken();
+ ExprResult Res(ParseConstantExpression());
+ if (Res.isInvalid())
+ SkipUntil(tok::semi, true, true);
+ else
+ DeclaratorInfo.BitfieldSize = Res.release();
+ }
+
+ // If attributes exist after the declarator, parse them.
+ MaybeParseGNUAttributes(DeclaratorInfo.D);
+
+ // We're done with this declarator; invoke the callback.
+ Decl *D = Fields.invoke(DeclaratorInfo);
+ PD.complete(D);
+
+ // If we don't have a comma, it is either the end of the list (a ';')
+ // or an error, bail out.
+ if (Tok.isNot(tok::comma))
+ return;
+
+ // Consume the comma.
+ CommaLoc = ConsumeToken();
+
+ FirstDeclarator = false;
+ }
+}
+
+/// ParseStructUnionBody
+/// struct-contents:
+/// struct-declaration-list
+/// [EXT] empty
+/// [GNU] "struct-declaration-list" without terminatoring ';'
+/// struct-declaration-list:
+/// struct-declaration
+/// struct-declaration-list struct-declaration
+/// [OBC] '@' 'defs' '(' class-name ')'
+///
+void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
+ unsigned TagType, Decl *TagDecl) {
+ PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
+ "parsing struct/union body");
+
+ BalancedDelimiterTracker T(*this, tok::l_brace);
+ if (T.consumeOpen())
+ return;
+
+ ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope);
+ Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
+
+ // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in
+ // C++.
+ if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus) {
+ Diag(Tok, diag::ext_empty_struct_union) << (TagType == TST_union);
+ Diag(Tok, diag::warn_empty_struct_union_compat) << (TagType == TST_union);
+ }
+
+ SmallVector<Decl *, 32> FieldDecls;
+
+ // While we still have something to read, read the declarations in the struct.
+ while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
+ // Each iteration of this loop reads one struct-declaration.
+
+ // Check for extraneous top-level semicolon.
+ if (Tok.is(tok::semi)) {
+ Diag(Tok, diag::ext_extra_struct_semi)
+ << DeclSpec::getSpecifierName((DeclSpec::TST)TagType)
+ << FixItHint::CreateRemoval(Tok.getLocation());
+ ConsumeToken();
+ continue;
+ }
+
+ // Parse all the comma separated declarators.
+ DeclSpec DS(AttrFactory);
+
+ if (!Tok.is(tok::at)) {
+ struct CFieldCallback : FieldCallback {
+ Parser &P;
+ Decl *TagDecl;
+ SmallVectorImpl<Decl *> &FieldDecls;
+
+ CFieldCallback(Parser &P, Decl *TagDecl,
+ SmallVectorImpl<Decl *> &FieldDecls) :
+ P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {}
+
+ virtual Decl *invoke(FieldDeclarator &FD) {
+ // Install the declarator into the current TagDecl.
+ Decl *Field = P.Actions.ActOnField(P.getCurScope(), TagDecl,
+ FD.D.getDeclSpec().getSourceRange().getBegin(),
+ FD.D, FD.BitfieldSize);
+ FieldDecls.push_back(Field);
+ return Field;
+ }
+ } Callback(*this, TagDecl, FieldDecls);
+
+ ParseStructDeclaration(DS, Callback);
+ } else { // Handle @defs
+ ConsumeToken();
+ if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
+ Diag(Tok, diag::err_unexpected_at);
+ SkipUntil(tok::semi, true);
+ continue;
+ }
+ ConsumeToken();
+ ExpectAndConsume(tok::l_paren, diag::err_expected_lparen);
+ if (!Tok.is(tok::identifier)) {
+ Diag(Tok, diag::err_expected_ident);
+ SkipUntil(tok::semi, true);
+ continue;
+ }
+ SmallVector<Decl *, 16> Fields;
+ Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(),
+ Tok.getIdentifierInfo(), Fields);
+ FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
+ ConsumeToken();
+ ExpectAndConsume(tok::r_paren, diag::err_expected_rparen);
+ }
+
+ if (Tok.is(tok::semi)) {
+ ConsumeToken();
+ } else if (Tok.is(tok::r_brace)) {
+ ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list);
+ break;
+ } else {
+ ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
+ // Skip to end of block or statement to avoid ext-warning on extra ';'.
+ SkipUntil(tok::r_brace, true, true);
+ // If we stopped at a ';', eat it.
+ if (Tok.is(tok::semi)) ConsumeToken();
+ }
+ }
+
+ T.consumeClose();
+
+ ParsedAttributes attrs(AttrFactory);
+ // If attributes exist after struct contents, parse them.
+ MaybeParseGNUAttributes(attrs);
+
+ Actions.ActOnFields(getCurScope(),
+ RecordLoc, TagDecl, FieldDecls,
+ T.getOpenLocation(), T.getCloseLocation(),
+ attrs.getList());
+ StructScope.Exit();
+ Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl,
+ T.getCloseLocation());
+}
+
+/// ParseEnumSpecifier
+/// enum-specifier: [C99 6.7.2.2]
+/// 'enum' identifier[opt] '{' enumerator-list '}'
+///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
+/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
+/// '}' attributes[opt]
+/// [MS] 'enum' __declspec[opt] identifier[opt] '{' enumerator-list ',' [opt]
+/// '}'
+/// 'enum' identifier
+/// [GNU] 'enum' attributes[opt] identifier
+///
+/// [C++11] enum-head '{' enumerator-list[opt] '}'
+/// [C++11] enum-head '{' enumerator-list ',' '}'
+///
+/// enum-head: [C++11]
+/// enum-key attribute-specifier-seq[opt] identifier[opt] enum-base[opt]
+/// enum-key attribute-specifier-seq[opt] nested-name-specifier
+/// identifier enum-base[opt]
+///
+/// enum-key: [C++11]
+/// 'enum'
+/// 'enum' 'class'
+/// 'enum' 'struct'
+///
+/// enum-base: [C++11]
+/// ':' type-specifier-seq
+///
+/// [C++] elaborated-type-specifier:
+/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
+///
+void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
+ const ParsedTemplateInfo &TemplateInfo,
+ AccessSpecifier AS, DeclSpecContext DSC) {
+ // Parse the tag portion of this.
+ if (Tok.is(tok::code_completion)) {
+ // Code completion for an enum name.
+ Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum);
+ return cutOffParsing();
+ }
+
+ SourceLocation ScopedEnumKWLoc;
+ bool IsScopedUsingClassTag = false;
+
+ if (getLangOpts().CPlusPlus0x &&
+ (Tok.is(tok::kw_class) || Tok.is(tok::kw_struct))) {
+ Diag(Tok, diag::warn_cxx98_compat_scoped_enum);
+ IsScopedUsingClassTag = Tok.is(tok::kw_class);
+ ScopedEnumKWLoc = ConsumeToken();
+ }
+
+ // C++11 [temp.explicit]p12: The usual access controls do not apply to names
+ // used to specify explicit instantiations. We extend this to also cover
+ // explicit specializations.
+ Sema::SuppressAccessChecksRAII SuppressAccess(Actions,
+ TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
+ TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
+
+ // If attributes exist after tag, parse them.
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseGNUAttributes(attrs);
+
+ // If declspecs exist after tag, parse them.
+ while (Tok.is(tok::kw___declspec))
+ ParseMicrosoftDeclSpec(attrs);
+
+ // Enum definitions should not be parsed in a trailing-return-type.
+ bool AllowDeclaration = DSC != DSC_trailing;
+
+ bool AllowFixedUnderlyingType = AllowDeclaration &&
+ (getLangOpts().CPlusPlus0x || getLangOpts().MicrosoftExt ||
+ getLangOpts().ObjC2);
+
+ CXXScopeSpec &SS = DS.getTypeSpecScope();
+ if (getLangOpts().CPlusPlus) {
+ // "enum foo : bar;" is not a potential typo for "enum foo::bar;"
+ // if a fixed underlying type is allowed.
+ ColonProtectionRAIIObject X(*this, AllowFixedUnderlyingType);
+
+ if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
+ /*EnteringContext=*/false))
+ return;
+
+ if (SS.isSet() && Tok.isNot(tok::identifier)) {
+ Diag(Tok, diag::err_expected_ident);
+ if (Tok.isNot(tok::l_brace)) {
+ // Has no name and is not a definition.
+ // Skip the rest of this declarator, up until the comma or semicolon.
+ SkipUntil(tok::comma, true);
+ return;
+ }
+ }
+ }
+
+ // Must have either 'enum name' or 'enum {...}'.
+ if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
+ !(AllowFixedUnderlyingType && Tok.is(tok::colon))) {
+ Diag(Tok, diag::err_expected_ident_lbrace);
+
+ // Skip the rest of this declarator, up until the comma or semicolon.
+ SkipUntil(tok::comma, true);
+ return;
+ }
+
+ // If an identifier is present, consume and remember it.
+ IdentifierInfo *Name = 0;
+ SourceLocation NameLoc;
+ if (Tok.is(tok::identifier)) {
+ Name = Tok.getIdentifierInfo();
+ NameLoc = ConsumeToken();
+ }
+
+ if (!Name && ScopedEnumKWLoc.isValid()) {
+ // C++0x 7.2p2: The optional identifier shall not be omitted in the
+ // declaration of a scoped enumeration.
+ Diag(Tok, diag::err_scoped_enum_missing_identifier);
+ ScopedEnumKWLoc = SourceLocation();
+ IsScopedUsingClassTag = false;
+ }
+
+ // Stop suppressing access control now we've parsed the enum name.
+ SuppressAccess.done();
+
+ TypeResult BaseType;
+
+ // Parse the fixed underlying type.
+ if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
+ bool PossibleBitfield = false;
+ if (getCurScope()->getFlags() & Scope::ClassScope) {
+ // If we're in class scope, this can either be an enum declaration with
+ // an underlying type, or a declaration of a bitfield member. We try to
+ // use a simple disambiguation scheme first to catch the common cases
+ // (integer literal, sizeof); if it's still ambiguous, we then consider
+ // anything that's a simple-type-specifier followed by '(' as an
+ // expression. This suffices because function types are not valid
+ // underlying types anyway.
+ TPResult TPR = isExpressionOrTypeSpecifierSimple(NextToken().getKind());
+ // If the next token starts an expression, we know we're parsing a
+ // bit-field. This is the common case.
+ if (TPR == TPResult::True())
+ PossibleBitfield = true;
+ // If the next token starts a type-specifier-seq, it may be either a
+ // a fixed underlying type or the start of a function-style cast in C++;
+ // lookahead one more token to see if it's obvious that we have a
+ // fixed underlying type.
+ else if (TPR == TPResult::False() &&
+ GetLookAheadToken(2).getKind() == tok::semi) {
+ // Consume the ':'.
+ ConsumeToken();
+ } else {
+ // We have the start of a type-specifier-seq, so we have to perform
+ // tentative parsing to determine whether we have an expression or a
+ // type.
+ TentativeParsingAction TPA(*this);
+
+ // Consume the ':'.
+ ConsumeToken();
+
+ // If we see a type specifier followed by an open-brace, we have an
+ // ambiguity between an underlying type and a C++11 braced
+ // function-style cast. Resolve this by always treating it as an
+ // underlying type.
+ // FIXME: The standard is not entirely clear on how to disambiguate in
+ // this case.
+ if ((getLangOpts().CPlusPlus &&
+ isCXXDeclarationSpecifier(TPResult::True()) != TPResult::True()) ||
+ (!getLangOpts().CPlusPlus && !isDeclarationSpecifier(true))) {
+ // We'll parse this as a bitfield later.
+ PossibleBitfield = true;
+ TPA.Revert();
+ } else {
+ // We have a type-specifier-seq.
+ TPA.Commit();
+ }
+ }
+ } else {
+ // Consume the ':'.
+ ConsumeToken();
+ }
+
+ if (!PossibleBitfield) {
+ SourceRange Range;
+ BaseType = ParseTypeName(&Range);
+
+ if (!getLangOpts().CPlusPlus0x && !getLangOpts().ObjC2)
+ Diag(StartLoc, diag::ext_ms_enum_fixed_underlying_type)
+ << Range;
+ if (getLangOpts().CPlusPlus0x)
+ Diag(StartLoc, diag::warn_cxx98_compat_enum_fixed_underlying_type);
+ }
+ }
+
+ // There are four options here. If we have 'friend enum foo;' then this is a
+ // friend declaration, and cannot have an accompanying definition. If we have
+ // 'enum foo;', then this is a forward declaration. If we have
+ // 'enum foo {...' then this is a definition. Otherwise we have something
+ // like 'enum foo xyz', a reference.
+ //
+ // This is needed to handle stuff like this right (C99 6.7.2.3p11):
+ // enum foo {..}; void bar() { enum foo; } <- new foo in bar.
+ // enum foo {..}; void bar() { enum foo x; } <- use of old foo.
+ //
+ Sema::TagUseKind TUK;
+ if (DS.isFriendSpecified())
+ TUK = Sema::TUK_Friend;
+ else if (!AllowDeclaration)
+ TUK = Sema::TUK_Reference;
+ else if (Tok.is(tok::l_brace))
+ TUK = Sema::TUK_Definition;
+ else if (Tok.is(tok::semi) && DSC != DSC_type_specifier)
+ TUK = Sema::TUK_Declaration;
+ else
+ TUK = Sema::TUK_Reference;
+
+ MultiTemplateParamsArg TParams;
+ if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
+ TUK != Sema::TUK_Reference) {
+ if (!getLangOpts().CPlusPlus0x || !SS.isSet()) {
+ // Skip the rest of this declarator, up until the comma or semicolon.
+ Diag(Tok, diag::err_enum_template);
+ SkipUntil(tok::comma, true);
+ return;
+ }
+
+ if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
+ // Enumerations can't be explicitly instantiated.
+ DS.SetTypeSpecError();
+ Diag(StartLoc, diag::err_explicit_instantiation_enum);
+ return;
+ }
+
+ assert(TemplateInfo.TemplateParams && "no template parameters");
+ TParams = MultiTemplateParamsArg(TemplateInfo.TemplateParams->data(),
+ TemplateInfo.TemplateParams->size());
+ }
+
+ if (!Name && TUK != Sema::TUK_Definition) {
+ Diag(Tok, diag::err_enumerator_unnamed_no_def);
+
+ // Skip the rest of this declarator, up until the comma or semicolon.
+ SkipUntil(tok::comma, true);
+ return;
+ }
+
+ bool Owned = false;
+ bool IsDependent = false;
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK,
+ StartLoc, SS, Name, NameLoc, attrs.getList(),
+ AS, DS.getModulePrivateSpecLoc(), TParams,
+ Owned, IsDependent, ScopedEnumKWLoc,
+ IsScopedUsingClassTag, BaseType);
+
+ if (IsDependent) {
+ // This enum has a dependent nested-name-specifier. Handle it as a
+ // dependent tag.
+ if (!Name) {
+ DS.SetTypeSpecError();
+ Diag(Tok, diag::err_expected_type_name_after_typename);
+ return;
+ }
+
+ TypeResult Type = Actions.ActOnDependentTag(getCurScope(), DeclSpec::TST_enum,
+ TUK, SS, Name, StartLoc,
+ NameLoc);
+ if (Type.isInvalid()) {
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ if (DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
+ NameLoc.isValid() ? NameLoc : StartLoc,
+ PrevSpec, DiagID, Type.get()))
+ Diag(StartLoc, DiagID) << PrevSpec;
+
+ return;
+ }
+
+ if (!TagDecl) {
+ // The action failed to produce an enumeration tag. If this is a
+ // definition, consume the entire definition.
+ if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
+ ConsumeBrace();
+ SkipUntil(tok::r_brace);
+ }
+
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ if (Tok.is(tok::l_brace) && TUK != Sema::TUK_Reference) {
+ if (TUK == Sema::TUK_Friend) {
+ Diag(Tok, diag::err_friend_decl_defines_type)
+ << SourceRange(DS.getFriendSpecLoc());
+ ConsumeBrace();
+ SkipUntil(tok::r_brace);
+ } else {
+ ParseEnumBody(StartLoc, TagDecl);
+ }
+ }
+
+ if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc,
+ NameLoc.isValid() ? NameLoc : StartLoc,
+ PrevSpec, DiagID, TagDecl, Owned))
+ Diag(StartLoc, DiagID) << PrevSpec;
+}
+
+/// ParseEnumBody - Parse a {} enclosed enumerator-list.
+/// enumerator-list:
+/// enumerator
+/// enumerator-list ',' enumerator
+/// enumerator:
+/// enumeration-constant
+/// enumeration-constant '=' constant-expression
+/// enumeration-constant:
+/// identifier
+///
+void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) {
+ // Enter the scope of the enum body and start the definition.
+ ParseScope EnumScope(this, Scope::DeclScope);
+ Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl);
+
+ BalancedDelimiterTracker T(*this, tok::l_brace);
+ T.consumeOpen();
+
+ // C does not allow an empty enumerator-list, C++ does [dcl.enum].
+ if (Tok.is(tok::r_brace) && !getLangOpts().CPlusPlus)
+ Diag(Tok, diag::error_empty_enum);
+
+ SmallVector<Decl *, 32> EnumConstantDecls;
+
+ Decl *LastEnumConstDecl = 0;
+
+ // Parse the enumerator-list.
+ while (Tok.is(tok::identifier)) {
+ IdentifierInfo *Ident = Tok.getIdentifierInfo();
+ SourceLocation IdentLoc = ConsumeToken();
+
+ // If attributes exist after the enumerator, parse them.
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseGNUAttributes(attrs);
+
+ SourceLocation EqualLoc;
+ ExprResult AssignedVal;
+ ParsingDeclRAIIObject PD(*this);
+
+ if (Tok.is(tok::equal)) {
+ EqualLoc = ConsumeToken();
+ AssignedVal = ParseConstantExpression();
+ if (AssignedVal.isInvalid())
+ SkipUntil(tok::comma, tok::r_brace, true, true);
+ }
+
+ // Install the enumerator constant into EnumDecl.
+ Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl,
+ LastEnumConstDecl,
+ IdentLoc, Ident,
+ attrs.getList(), EqualLoc,
+ AssignedVal.release());
+ PD.complete(EnumConstDecl);
+
+ EnumConstantDecls.push_back(EnumConstDecl);
+ LastEnumConstDecl = EnumConstDecl;
+
+ if (Tok.is(tok::identifier)) {
+ // We're missing a comma between enumerators.
+ SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
+ Diag(Loc, diag::err_enumerator_list_missing_comma)
+ << FixItHint::CreateInsertion(Loc, ", ");
+ continue;
+ }
+
+ if (Tok.isNot(tok::comma))
+ break;
+ SourceLocation CommaLoc = ConsumeToken();
+
+ if (Tok.isNot(tok::identifier)) {
+ if (!getLangOpts().C99 && !getLangOpts().CPlusPlus0x)
+ Diag(CommaLoc, diag::ext_enumerator_list_comma)
+ << getLangOpts().CPlusPlus
+ << FixItHint::CreateRemoval(CommaLoc);
+ else if (getLangOpts().CPlusPlus0x)
+ Diag(CommaLoc, diag::warn_cxx98_compat_enumerator_list_comma)
+ << FixItHint::CreateRemoval(CommaLoc);
+ }
+ }
+
+ // Eat the }.
+ T.consumeClose();
+
+ // If attributes exist after the identifier list, parse them.
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseGNUAttributes(attrs);
+
+ Actions.ActOnEnumBody(StartLoc, T.getOpenLocation(), T.getCloseLocation(),
+ EnumDecl, EnumConstantDecls.data(),
+ EnumConstantDecls.size(), getCurScope(),
+ attrs.getList());
+
+ EnumScope.Exit();
+ Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl,
+ T.getCloseLocation());
+}
+
+/// isTypeSpecifierQualifier - Return true if the current token could be the
+/// start of a type-qualifier-list.
+bool Parser::isTypeQualifier() const {
+ switch (Tok.getKind()) {
+ default: return false;
+
+ // type-qualifier only in OpenCL
+ case tok::kw_private:
+ return getLangOpts().OpenCL;
+
+ // type-qualifier
+ case tok::kw_const:
+ case tok::kw_volatile:
+ case tok::kw_restrict:
+ case tok::kw___private:
+ case tok::kw___local:
+ case tok::kw___global:
+ case tok::kw___constant:
+ case tok::kw___read_only:
+ case tok::kw___read_write:
+ case tok::kw___write_only:
+ return true;
+ }
+}
+
+/// 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 Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
+ switch (Tok.getKind()) {
+ default: return false;
+ // type-specifiers
+ case tok::kw_short:
+ case tok::kw_long:
+ case tok::kw___int64:
+ case tok::kw___int128:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw__Complex:
+ case tok::kw__Imaginary:
+ case tok::kw_void:
+ case tok::kw_char:
+ case tok::kw_wchar_t:
+ case tok::kw_char16_t:
+ case tok::kw_char32_t:
+ case tok::kw_int:
+ case tok::kw_half:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_bool:
+ case tok::kw__Bool:
+ case tok::kw__Decimal32:
+ case tok::kw__Decimal64:
+ case tok::kw__Decimal128:
+ case tok::kw___vector:
+
+ // struct-or-union-specifier (C99) or class-specifier (C++)
+ case tok::kw_class:
+ case tok::kw_struct:
+ case tok::kw_union:
+ // enum-specifier
+ case tok::kw_enum:
+
+ // typedef-name
+ case tok::annot_typename:
+ return true;
+ }
+}
+
+/// isTypeSpecifierQualifier - Return true if the current token could be the
+/// start of a specifier-qualifier-list.
+bool Parser::isTypeSpecifierQualifier() {
+ switch (Tok.getKind()) {
+ default: return false;
+
+ case tok::identifier: // foo::bar
+ if (TryAltiVecVectorToken())
+ return true;
+ // Fall through.
+ case tok::kw_typename: // typename T::type
+ // Annotate typenames and C++ scope specifiers. If we get one, just
+ // recurse to handle whatever we get.
+ if (TryAnnotateTypeOrScopeToken())
+ return true;
+ if (Tok.is(tok::identifier))
+ return false;
+ return isTypeSpecifierQualifier();
+
+ case tok::coloncolon: // ::foo::bar
+ if (NextToken().is(tok::kw_new) || // ::new
+ NextToken().is(tok::kw_delete)) // ::delete
+ return false;
+
+ if (TryAnnotateTypeOrScopeToken())
+ return true;
+ return isTypeSpecifierQualifier();
+
+ // GNU attributes support.
+ case tok::kw___attribute:
+ // GNU typeof support.
+ case tok::kw_typeof:
+
+ // type-specifiers
+ case tok::kw_short:
+ case tok::kw_long:
+ case tok::kw___int64:
+ case tok::kw___int128:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw__Complex:
+ case tok::kw__Imaginary:
+ case tok::kw_void:
+ case tok::kw_char:
+ case tok::kw_wchar_t:
+ case tok::kw_char16_t:
+ case tok::kw_char32_t:
+ case tok::kw_int:
+ case tok::kw_half:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_bool:
+ case tok::kw__Bool:
+ case tok::kw__Decimal32:
+ case tok::kw__Decimal64:
+ case tok::kw__Decimal128:
+ case tok::kw___vector:
+
+ // struct-or-union-specifier (C99) or class-specifier (C++)
+ case tok::kw_class:
+ case tok::kw_struct:
+ case tok::kw_union:
+ // enum-specifier
+ case tok::kw_enum:
+
+ // type-qualifier
+ case tok::kw_const:
+ case tok::kw_volatile:
+ case tok::kw_restrict:
+
+ // typedef-name
+ case tok::annot_typename:
+ return true;
+
+ // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
+ case tok::less:
+ return getLangOpts().ObjC1;
+
+ case tok::kw___cdecl:
+ case tok::kw___stdcall:
+ case tok::kw___fastcall:
+ case tok::kw___thiscall:
+ case tok::kw___w64:
+ case tok::kw___ptr64:
+ case tok::kw___ptr32:
+ case tok::kw___pascal:
+ case tok::kw___unaligned:
+
+ case tok::kw___private:
+ case tok::kw___local:
+ case tok::kw___global:
+ case tok::kw___constant:
+ case tok::kw___read_only:
+ case tok::kw___read_write:
+ case tok::kw___write_only:
+
+ return true;
+
+ case tok::kw_private:
+ return getLangOpts().OpenCL;
+
+ // C11 _Atomic()
+ case tok::kw__Atomic:
+ return true;
+ }
+}
+
+/// isDeclarationSpecifier() - Return true if the current token is part of a
+/// declaration specifier.
+///
+/// \param DisambiguatingWithExpression True to indicate that the purpose of
+/// this check is to disambiguate between an expression and a declaration.
+bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
+ switch (Tok.getKind()) {
+ default: return false;
+
+ case tok::kw_private:
+ return getLangOpts().OpenCL;
+
+ case tok::identifier: // foo::bar
+ // Unfortunate hack to support "Class.factoryMethod" notation.
+ if (getLangOpts().ObjC1 && NextToken().is(tok::period))
+ return false;
+ if (TryAltiVecVectorToken())
+ return true;
+ // Fall through.
+ case tok::kw_decltype: // decltype(T())::type
+ case tok::kw_typename: // typename T::type
+ // Annotate typenames and C++ scope specifiers. If we get one, just
+ // recurse to handle whatever we get.
+ if (TryAnnotateTypeOrScopeToken())
+ return true;
+ if (Tok.is(tok::identifier))
+ return false;
+
+ // If we're in Objective-C and we have an Objective-C class type followed
+ // by an identifier and then either ':' or ']', in a place where an
+ // expression is permitted, then this is probably a class message send
+ // missing the initial '['. In this case, we won't consider this to be
+ // the start of a declaration.
+ if (DisambiguatingWithExpression &&
+ isStartOfObjCClassMessageMissingOpenBracket())
+ return false;
+
+ return isDeclarationSpecifier();
+
+ case tok::coloncolon: // ::foo::bar
+ if (NextToken().is(tok::kw_new) || // ::new
+ NextToken().is(tok::kw_delete)) // ::delete
+ return false;
+
+ // Annotate typenames and C++ scope specifiers. If we get one, just
+ // recurse to handle whatever we get.
+ if (TryAnnotateTypeOrScopeToken())
+ return true;
+ return isDeclarationSpecifier();
+
+ // storage-class-specifier
+ case tok::kw_typedef:
+ case tok::kw_extern:
+ case tok::kw___private_extern__:
+ case tok::kw_static:
+ case tok::kw_auto:
+ case tok::kw_register:
+ case tok::kw___thread:
+
+ // Modules
+ case tok::kw___module_private__:
+
+ // type-specifiers
+ case tok::kw_short:
+ case tok::kw_long:
+ case tok::kw___int64:
+ case tok::kw___int128:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw__Complex:
+ case tok::kw__Imaginary:
+ case tok::kw_void:
+ case tok::kw_char:
+ case tok::kw_wchar_t:
+ case tok::kw_char16_t:
+ case tok::kw_char32_t:
+
+ case tok::kw_int:
+ case tok::kw_half:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_bool:
+ case tok::kw__Bool:
+ case tok::kw__Decimal32:
+ case tok::kw__Decimal64:
+ case tok::kw__Decimal128:
+ case tok::kw___vector:
+
+ // struct-or-union-specifier (C99) or class-specifier (C++)
+ case tok::kw_class:
+ case tok::kw_struct:
+ case tok::kw_union:
+ // enum-specifier
+ case tok::kw_enum:
+
+ // type-qualifier
+ case tok::kw_const:
+ case tok::kw_volatile:
+ case tok::kw_restrict:
+
+ // function-specifier
+ case tok::kw_inline:
+ case tok::kw_virtual:
+ case tok::kw_explicit:
+
+ // static_assert-declaration
+ case tok::kw__Static_assert:
+
+ // GNU typeof support.
+ case tok::kw_typeof:
+
+ // GNU attributes.
+ case tok::kw___attribute:
+ return true;
+
+ // C++0x decltype.
+ case tok::annot_decltype:
+ return true;
+
+ // C11 _Atomic()
+ case tok::kw__Atomic:
+ return true;
+
+ // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
+ case tok::less:
+ return getLangOpts().ObjC1;
+
+ // typedef-name
+ case tok::annot_typename:
+ return !DisambiguatingWithExpression ||
+ !isStartOfObjCClassMessageMissingOpenBracket();
+
+ case tok::kw___declspec:
+ case tok::kw___cdecl:
+ case tok::kw___stdcall:
+ case tok::kw___fastcall:
+ case tok::kw___thiscall:
+ case tok::kw___w64:
+ case tok::kw___ptr64:
+ case tok::kw___ptr32:
+ case tok::kw___forceinline:
+ case tok::kw___pascal:
+ case tok::kw___unaligned:
+
+ case tok::kw___private:
+ case tok::kw___local:
+ case tok::kw___global:
+ case tok::kw___constant:
+ case tok::kw___read_only:
+ case tok::kw___read_write:
+ case tok::kw___write_only:
+
+ return true;
+ }
+}
+
+bool Parser::isConstructorDeclarator() {
+ TentativeParsingAction TPA(*this);
+
+ // Parse the C++ scope specifier.
+ CXXScopeSpec SS;
+ if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
+ /*EnteringContext=*/true)) {
+ TPA.Revert();
+ return false;
+ }
+
+ // Parse the constructor name.
+ if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) {
+ // We already know that we have a constructor name; just consume
+ // the token.
+ ConsumeToken();
+ } else {
+ TPA.Revert();
+ return false;
+ }
+
+ // Current class name must be followed by a left parenthesis.
+ if (Tok.isNot(tok::l_paren)) {
+ TPA.Revert();
+ return false;
+ }
+ ConsumeParen();
+
+ // A right parenthesis, or ellipsis followed by a right parenthesis signals
+ // that we have a constructor.
+ if (Tok.is(tok::r_paren) ||
+ (Tok.is(tok::ellipsis) && NextToken().is(tok::r_paren))) {
+ TPA.Revert();
+ return true;
+ }
+
+ // If we need to, enter the specified scope.
+ DeclaratorScopeObj DeclScopeObj(*this, SS);
+ if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
+ DeclScopeObj.EnterDeclaratorScope();
+
+ // Optionally skip Microsoft attributes.
+ ParsedAttributes Attrs(AttrFactory);
+ MaybeParseMicrosoftAttributes(Attrs);
+
+ // Check whether the next token(s) are part of a declaration
+ // specifier, in which case we have the start of a parameter and,
+ // therefore, we know that this is a constructor.
+ bool IsConstructor = false;
+ if (isDeclarationSpecifier())
+ IsConstructor = true;
+ else if (Tok.is(tok::identifier) ||
+ (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::identifier))) {
+ // We've seen "C ( X" or "C ( X::Y", but "X" / "X::Y" is not a type.
+ // This might be a parenthesized member name, but is more likely to
+ // be a constructor declaration with an invalid argument type. Keep
+ // looking.
+ if (Tok.is(tok::annot_cxxscope))
+ ConsumeToken();
+ ConsumeToken();
+
+ // If this is not a constructor, we must be parsing a declarator,
+ // which must have one of the following syntactic forms (see the
+ // grammar extract at the start of ParseDirectDeclarator):
+ switch (Tok.getKind()) {
+ case tok::l_paren:
+ // C(X ( int));
+ case tok::l_square:
+ // C(X [ 5]);
+ // C(X [ [attribute]]);
+ case tok::coloncolon:
+ // C(X :: Y);
+ // C(X :: *p);
+ case tok::r_paren:
+ // C(X )
+ // Assume this isn't a constructor, rather than assuming it's a
+ // constructor with an unnamed parameter of an ill-formed type.
+ break;
+
+ default:
+ IsConstructor = true;
+ break;
+ }
+ }
+
+ TPA.Revert();
+ return IsConstructor;
+}
+
+/// ParseTypeQualifierListOpt
+/// type-qualifier-list: [C99 6.7.5]
+/// type-qualifier
+/// [vendor] attributes
+/// [ only if VendorAttributesAllowed=true ]
+/// type-qualifier-list type-qualifier
+/// [vendor] type-qualifier-list attributes
+/// [ only if VendorAttributesAllowed=true ]
+/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq
+/// [ only if CXX0XAttributesAllowed=true ]
+/// Note: vendor can be GNU, MS, etc.
+///
+void Parser::ParseTypeQualifierListOpt(DeclSpec &DS,
+ bool VendorAttributesAllowed,
+ bool CXX11AttributesAllowed) {
+ if (getLangOpts().CPlusPlus0x && CXX11AttributesAllowed &&
+ isCXX11AttributeSpecifier()) {
+ ParsedAttributesWithRange attrs(AttrFactory);
+ ParseCXX11Attributes(attrs);
+ DS.takeAttributesFrom(attrs);
+ }
+
+ SourceLocation EndLoc;
+
+ while (1) {
+ bool isInvalid = false;
+ const char *PrevSpec = 0;
+ unsigned DiagID = 0;
+ SourceLocation Loc = Tok.getLocation();
+
+ switch (Tok.getKind()) {
+ case tok::code_completion:
+ Actions.CodeCompleteTypeQualifiers(DS);
+ return cutOffParsing();
+
+ case tok::kw_const:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+ case tok::kw_volatile:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+ case tok::kw_restrict:
+ isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID,
+ getLangOpts());
+ break;
+
+ // OpenCL qualifiers:
+ case tok::kw_private:
+ if (!getLangOpts().OpenCL)
+ goto DoneWithTypeQuals;
+ case tok::kw___private:
+ case tok::kw___global:
+ case tok::kw___local:
+ case tok::kw___constant:
+ case tok::kw___read_only:
+ case tok::kw___write_only:
+ case tok::kw___read_write:
+ ParseOpenCLQualifiers(DS);
+ break;
+
+ case tok::kw___w64:
+ case tok::kw___ptr64:
+ case tok::kw___ptr32:
+ case tok::kw___cdecl:
+ case tok::kw___stdcall:
+ case tok::kw___fastcall:
+ case tok::kw___thiscall:
+ case tok::kw___unaligned:
+ if (VendorAttributesAllowed) {
+ ParseMicrosoftTypeAttributes(DS.getAttributes());
+ continue;
+ }
+ goto DoneWithTypeQuals;
+ case tok::kw___pascal:
+ if (VendorAttributesAllowed) {
+ ParseBorlandTypeAttributes(DS.getAttributes());
+ continue;
+ }
+ goto DoneWithTypeQuals;
+ case tok::kw___attribute:
+ if (VendorAttributesAllowed) {
+ ParseGNUAttributes(DS.getAttributes());
+ continue; // do *not* consume the next token!
+ }
+ // otherwise, FALL THROUGH!
+ default:
+ DoneWithTypeQuals:
+ // If this is not a type-qualifier token, we're done reading type
+ // qualifiers. First verify that DeclSpec's are consistent.
+ DS.Finish(Diags, PP);
+ if (EndLoc.isValid())
+ DS.SetRangeEnd(EndLoc);
+ return;
+ }
+
+ // If the specifier combination wasn't legal, issue a diagnostic.
+ if (isInvalid) {
+ assert(PrevSpec && "Method did not return previous specifier!");
+ Diag(Tok, DiagID) << PrevSpec;
+ }
+ EndLoc = ConsumeToken();
+ }
+}
+
+
+/// ParseDeclarator - Parse and verify a newly-initialized declarator.
+///
+void Parser::ParseDeclarator(Declarator &D) {
+ /// This implements the 'declarator' production in the C grammar, then checks
+ /// for well-formedness and issues diagnostics.
+ ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
+}
+
+static bool isPtrOperatorToken(tok::TokenKind Kind, const LangOptions &Lang) {
+ if (Kind == tok::star || Kind == tok::caret)
+ return true;
+
+ // We parse rvalue refs in C++03, because otherwise the errors are scary.
+ if (!Lang.CPlusPlus)
+ return false;
+
+ return Kind == tok::amp || Kind == tok::ampamp;
+}
+
+/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
+/// is parsed by the function passed to it. Pass null, and the direct-declarator
+/// isn't parsed at all, making this function effectively parse the C++
+/// ptr-operator production.
+///
+/// If the grammar of this construct is extended, matching changes must also be
+/// made to TryParseDeclarator and MightBeDeclarator, and possibly to
+/// isConstructorDeclarator.
+///
+/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl]
+/// [C] pointer[opt] direct-declarator
+/// [C++] direct-declarator
+/// [C++] ptr-operator declarator
+///
+/// pointer: [C99 6.7.5]
+/// '*' type-qualifier-list[opt]
+/// '*' type-qualifier-list[opt] pointer
+///
+/// ptr-operator:
+/// '*' cv-qualifier-seq[opt]
+/// '&'
+/// [C++0x] '&&'
+/// [GNU] '&' restrict[opt] attributes[opt]
+/// [GNU?] '&&' restrict[opt] attributes[opt]
+/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt]
+void Parser::ParseDeclaratorInternal(Declarator &D,
+ DirectDeclParseFunction DirectDeclParser) {
+ if (Diags.hasAllExtensionsSilenced())
+ D.setExtension();
+
+ // C++ member pointers start with a '::' or a nested-name.
+ // Member pointers get special handling, since there's no place for the
+ // scope spec in the generic path below.
+ if (getLangOpts().CPlusPlus &&
+ (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) ||
+ Tok.is(tok::annot_cxxscope))) {
+ bool EnteringContext = D.getContext() == Declarator::FileContext ||
+ D.getContext() == Declarator::MemberContext;
+ CXXScopeSpec SS;
+ ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext);
+
+ if (SS.isNotEmpty()) {
+ if (Tok.isNot(tok::star)) {
+ // The scope spec really belongs to the direct-declarator.
+ D.getCXXScopeSpec() = SS;
+ if (DirectDeclParser)
+ (this->*DirectDeclParser)(D);
+ return;
+ }
+
+ SourceLocation Loc = ConsumeToken();
+ D.SetRangeEnd(Loc);
+ DeclSpec DS(AttrFactory);
+ ParseTypeQualifierListOpt(DS);
+ D.ExtendWithDeclSpec(DS);
+
+ // Recurse to parse whatever is left.
+ ParseDeclaratorInternal(D, DirectDeclParser);
+
+ // Sema will have to catch (syntactically invalid) pointers into global
+ // scope. It has to catch pointers into namespace scope anyway.
+ D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(),
+ Loc),
+ DS.getAttributes(),
+ /* Don't replace range end. */SourceLocation());
+ return;
+ }
+ }
+
+ tok::TokenKind Kind = Tok.getKind();
+ // Not a pointer, C++ reference, or block.
+ if (!isPtrOperatorToken(Kind, getLangOpts())) {
+ if (DirectDeclParser)
+ (this->*DirectDeclParser)(D);
+ return;
+ }
+
+ // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference,
+ // '&&' -> rvalue reference
+ SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&.
+ D.SetRangeEnd(Loc);
+
+ if (Kind == tok::star || Kind == tok::caret) {
+ // Is a pointer.
+ DeclSpec DS(AttrFactory);
+
+ // FIXME: GNU attributes are not allowed here in a new-type-id.
+ ParseTypeQualifierListOpt(DS);
+ D.ExtendWithDeclSpec(DS);
+
+ // Recursively parse the declarator.
+ ParseDeclaratorInternal(D, DirectDeclParser);
+ if (Kind == tok::star)
+ // Remember that we parsed a pointer type, and remember the type-quals.
+ D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
+ DS.getConstSpecLoc(),
+ DS.getVolatileSpecLoc(),
+ DS.getRestrictSpecLoc()),
+ DS.getAttributes(),
+ SourceLocation());
+ else
+ // Remember that we parsed a Block type, and remember the type-quals.
+ D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
+ Loc),
+ DS.getAttributes(),
+ SourceLocation());
+ } else {
+ // Is a reference
+ DeclSpec DS(AttrFactory);
+
+ // Complain about rvalue references in C++03, but then go on and build
+ // the declarator.
+ if (Kind == tok::ampamp)
+ Diag(Loc, getLangOpts().CPlusPlus0x ?
+ diag::warn_cxx98_compat_rvalue_reference :
+ diag::ext_rvalue_reference);
+
+ // GNU-style and C++11 attributes are allowed here, as is restrict.
+ ParseTypeQualifierListOpt(DS);
+ D.ExtendWithDeclSpec(DS);
+
+ // C++ 8.3.2p1: cv-qualified references are ill-formed except when the
+ // cv-qualifiers are introduced through the use of a typedef or of a
+ // template type argument, in which case the cv-qualifiers are ignored.
+ if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
+ if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
+ Diag(DS.getConstSpecLoc(),
+ diag::err_invalid_reference_qualifier_application) << "const";
+ if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
+ Diag(DS.getVolatileSpecLoc(),
+ diag::err_invalid_reference_qualifier_application) << "volatile";
+ }
+
+ // Recursively parse the declarator.
+ ParseDeclaratorInternal(D, DirectDeclParser);
+
+ if (D.getNumTypeObjects() > 0) {
+ // C++ [dcl.ref]p4: There shall be no references to references.
+ DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
+ if (InnerChunk.Kind == DeclaratorChunk::Reference) {
+ if (const IdentifierInfo *II = D.getIdentifier())
+ Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
+ << II;
+ else
+ Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
+ << "type name";
+
+ // Once we've complained about the reference-to-reference, we
+ // can go ahead and build the (technically ill-formed)
+ // declarator: reference collapsing will take care of it.
+ }
+ }
+
+ // Remember that we parsed a reference type. It doesn't have type-quals.
+ D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
+ Kind == tok::amp),
+ DS.getAttributes(),
+ SourceLocation());
+ }
+}
+
+static void diagnoseMisplacedEllipsis(Parser &P, Declarator &D,
+ SourceLocation EllipsisLoc) {
+ if (EllipsisLoc.isValid()) {
+ FixItHint Insertion;
+ if (!D.getEllipsisLoc().isValid()) {
+ Insertion = FixItHint::CreateInsertion(D.getIdentifierLoc(), "...");
+ D.setEllipsisLoc(EllipsisLoc);
+ }
+ P.Diag(EllipsisLoc, diag::err_misplaced_ellipsis_in_declaration)
+ << FixItHint::CreateRemoval(EllipsisLoc) << Insertion << !D.hasName();
+ }
+}
+
+/// ParseDirectDeclarator
+/// direct-declarator: [C99 6.7.5]
+/// [C99] identifier
+/// '(' declarator ')'
+/// [GNU] '(' attributes declarator ')'
+/// [C90] direct-declarator '[' constant-expression[opt] ']'
+/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
+/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
+/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
+/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
+/// [C++11] direct-declarator '[' constant-expression[opt] ']'
+/// attribute-specifier-seq[opt]
+/// direct-declarator '(' parameter-type-list ')'
+/// direct-declarator '(' identifier-list[opt] ')'
+/// [GNU] direct-declarator '(' parameter-forward-declarations
+/// parameter-type-list[opt] ')'
+/// [C++] direct-declarator '(' parameter-declaration-clause ')'
+/// cv-qualifier-seq[opt] exception-specification[opt]
+/// [C++11] direct-declarator '(' parameter-declaration-clause ')'
+/// attribute-specifier-seq[opt] cv-qualifier-seq[opt]
+/// ref-qualifier[opt] exception-specification[opt]
+/// [C++] declarator-id
+/// [C++11] declarator-id attribute-specifier-seq[opt]
+///
+/// declarator-id: [C++ 8]
+/// '...'[opt] id-expression
+/// '::'[opt] nested-name-specifier[opt] type-name
+///
+/// id-expression: [C++ 5.1]
+/// unqualified-id
+/// qualified-id
+///
+/// unqualified-id: [C++ 5.1]
+/// identifier
+/// operator-function-id
+/// conversion-function-id
+/// '~' class-name
+/// template-id
+///
+/// Note, any additional constructs added here may need corresponding changes
+/// in isConstructorDeclarator.
+void Parser::ParseDirectDeclarator(Declarator &D) {
+ DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
+
+ if (getLangOpts().CPlusPlus && D.mayHaveIdentifier()) {
+ // ParseDeclaratorInternal might already have parsed the scope.
+ if (D.getCXXScopeSpec().isEmpty()) {
+ bool EnteringContext = D.getContext() == Declarator::FileContext ||
+ D.getContext() == Declarator::MemberContext;
+ ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(),
+ EnteringContext);
+ }
+
+ if (D.getCXXScopeSpec().isValid()) {
+ if (Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
+ // Change the declaration context for name lookup, until this function
+ // is exited (and the declarator has been parsed).
+ DeclScopeObj.EnterDeclaratorScope();
+ }
+
+ // C++0x [dcl.fct]p14:
+ // There is a syntactic ambiguity when an ellipsis occurs at the end
+ // of a parameter-declaration-clause without a preceding comma. In
+ // this case, the ellipsis is parsed as part of the
+ // abstract-declarator if the type of the parameter names a template
+ // parameter pack that has not been expanded; otherwise, it is parsed
+ // as part of the parameter-declaration-clause.
+ if (Tok.is(tok::ellipsis) && D.getCXXScopeSpec().isEmpty() &&
+ !((D.getContext() == Declarator::PrototypeContext ||
+ D.getContext() == Declarator::BlockLiteralContext) &&
+ NextToken().is(tok::r_paren) &&
+ !Actions.containsUnexpandedParameterPacks(D))) {
+ SourceLocation EllipsisLoc = ConsumeToken();
+ if (isPtrOperatorToken(Tok.getKind(), getLangOpts())) {
+ // The ellipsis was put in the wrong place. Recover, and explain to
+ // the user what they should have done.
+ ParseDeclarator(D);
+ diagnoseMisplacedEllipsis(*this, D, EllipsisLoc);
+ return;
+ } else
+ D.setEllipsisLoc(EllipsisLoc);
+
+ // The ellipsis can't be followed by a parenthesized declarator. We
+ // check for that in ParseParenDeclarator, after we have disambiguated
+ // the l_paren token.
+ }
+
+ if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) ||
+ Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) {
+ // We found something that indicates the start of an unqualified-id.
+ // Parse that unqualified-id.
+ bool AllowConstructorName;
+ if (D.getDeclSpec().hasTypeSpecifier())
+ AllowConstructorName = false;
+ else if (D.getCXXScopeSpec().isSet())
+ AllowConstructorName =
+ (D.getContext() == Declarator::FileContext ||
+ (D.getContext() == Declarator::MemberContext &&
+ D.getDeclSpec().isFriendSpecified()));
+ else
+ AllowConstructorName = (D.getContext() == Declarator::MemberContext);
+
+ SourceLocation TemplateKWLoc;
+ if (ParseUnqualifiedId(D.getCXXScopeSpec(),
+ /*EnteringContext=*/true,
+ /*AllowDestructorName=*/true,
+ AllowConstructorName,
+ ParsedType(),
+ TemplateKWLoc,
+ D.getName()) ||
+ // Once we're past the identifier, if the scope was bad, mark the
+ // whole declarator bad.
+ D.getCXXScopeSpec().isInvalid()) {
+ D.SetIdentifier(0, Tok.getLocation());
+ D.setInvalidType(true);
+ } else {
+ // Parsed the unqualified-id; update range information and move along.
+ if (D.getSourceRange().getBegin().isInvalid())
+ D.SetRangeBegin(D.getName().getSourceRange().getBegin());
+ D.SetRangeEnd(D.getName().getSourceRange().getEnd());
+ }
+ goto PastIdentifier;
+ }
+ } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
+ assert(!getLangOpts().CPlusPlus &&
+ "There's a C++-specific check for tok::identifier above");
+ assert(Tok.getIdentifierInfo() && "Not an identifier?");
+ D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
+ ConsumeToken();
+ goto PastIdentifier;
+ }
+
+ if (Tok.is(tok::l_paren)) {
+ // direct-declarator: '(' declarator ')'
+ // direct-declarator: '(' attributes declarator ')'
+ // Example: 'char (*X)' or 'int (*XX)(void)'
+ ParseParenDeclarator(D);
+
+ // If the declarator was parenthesized, we entered the declarator
+ // scope when parsing the parenthesized declarator, then exited
+ // the scope already. Re-enter the scope, if we need to.
+ if (D.getCXXScopeSpec().isSet()) {
+ // If there was an error parsing parenthesized declarator, declarator
+ // scope may have been entered before. Don't do it again.
+ if (!D.isInvalidType() &&
+ Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec()))
+ // Change the declaration context for name lookup, until this function
+ // is exited (and the declarator has been parsed).
+ DeclScopeObj.EnterDeclaratorScope();
+ }
+ } else if (D.mayOmitIdentifier()) {
+ // This could be something simple like "int" (in which case the declarator
+ // portion is empty), if an abstract-declarator is allowed.
+ D.SetIdentifier(0, Tok.getLocation());
+ } else {
+ if (D.getContext() == Declarator::MemberContext)
+ Diag(Tok, diag::err_expected_member_name_or_semi)
+ << D.getDeclSpec().getSourceRange();
+ else if (getLangOpts().CPlusPlus)
+ Diag(Tok, diag::err_expected_unqualified_id) << getLangOpts().CPlusPlus;
+ else
+ Diag(Tok, diag::err_expected_ident_lparen);
+ D.SetIdentifier(0, Tok.getLocation());
+ D.setInvalidType(true);
+ }
+
+ PastIdentifier:
+ assert(D.isPastIdentifier() &&
+ "Haven't past the location of the identifier yet?");
+
+ // Don't parse attributes unless we have parsed an unparenthesized name.
+ if (D.hasName() && !D.getNumTypeObjects())
+ MaybeParseCXX0XAttributes(D);
+
+ while (1) {
+ if (Tok.is(tok::l_paren)) {
+ // Enter function-declaration scope, limiting any declarators to the
+ // function prototype scope, including parameter declarators.
+ ParseScope PrototypeScope(this,
+ Scope::FunctionPrototypeScope|Scope::DeclScope);
+ // The paren may be part of a C++ direct initializer, eg. "int x(1);".
+ // In such a case, check if we actually have a function declarator; if it
+ // is not, the declarator has been fully parsed.
+ if (getLangOpts().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
+ // When not in file scope, warn for ambiguous function declarators, just
+ // in case the author intended it as a variable definition.
+ bool warnIfAmbiguous = D.getContext() != Declarator::FileContext;
+ if (!isCXXFunctionDeclarator(warnIfAmbiguous))
+ break;
+ }
+ ParsedAttributes attrs(AttrFactory);
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+ ParseFunctionDeclarator(D, attrs, T);
+ PrototypeScope.Exit();
+ } else if (Tok.is(tok::l_square)) {
+ ParseBracketDeclarator(D);
+ } else {
+ break;
+ }
+ }
+}
+
+/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
+/// only called before the identifier, so these are most likely just grouping
+/// parens for precedence. If we find that these are actually function
+/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
+///
+/// direct-declarator:
+/// '(' declarator ')'
+/// [GNU] '(' attributes declarator ')'
+/// direct-declarator '(' parameter-type-list ')'
+/// direct-declarator '(' identifier-list[opt] ')'
+/// [GNU] direct-declarator '(' parameter-forward-declarations
+/// parameter-type-list[opt] ')'
+///
+void Parser::ParseParenDeclarator(Declarator &D) {
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+
+ assert(!D.isPastIdentifier() && "Should be called before passing identifier");
+
+ // Eat any attributes before we look at whether this is a grouping or function
+ // declarator paren. If this is a grouping paren, the attribute applies to
+ // the type being built up, for example:
+ // int (__attribute__(()) *x)(long y)
+ // If this ends up not being a grouping paren, the attribute applies to the
+ // first argument, for example:
+ // int (__attribute__(()) int x)
+ // In either case, we need to eat any attributes to be able to determine what
+ // sort of paren this is.
+ //
+ ParsedAttributes attrs(AttrFactory);
+ bool RequiresArg = false;
+ if (Tok.is(tok::kw___attribute)) {
+ ParseGNUAttributes(attrs);
+
+ // We require that the argument list (if this is a non-grouping paren) be
+ // present even if the attribute list was empty.
+ RequiresArg = true;
+ }
+ // Eat any Microsoft extensions.
+ if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) ||
+ Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___fastcall) ||
+ Tok.is(tok::kw___w64) || Tok.is(tok::kw___ptr64) ||
+ Tok.is(tok::kw___ptr32) || Tok.is(tok::kw___unaligned)) {
+ ParseMicrosoftTypeAttributes(attrs);
+ }
+ // Eat any Borland extensions.
+ if (Tok.is(tok::kw___pascal))
+ ParseBorlandTypeAttributes(attrs);
+
+ // If we haven't past the identifier yet (or where the identifier would be
+ // stored, if this is an abstract declarator), then this is probably just
+ // grouping parens. However, if this could be an abstract-declarator, then
+ // this could also be the start of function arguments (consider 'void()').
+ bool isGrouping;
+
+ if (!D.mayOmitIdentifier()) {
+ // If this can't be an abstract-declarator, this *must* be a grouping
+ // paren, because we haven't seen the identifier yet.
+ isGrouping = true;
+ } else if (Tok.is(tok::r_paren) || // 'int()' is a function.
+ (getLangOpts().CPlusPlus && Tok.is(tok::ellipsis) &&
+ NextToken().is(tok::r_paren)) || // C++ int(...)
+ isDeclarationSpecifier() || // 'int(int)' is a function.
+ isCXX11AttributeSpecifier()) { // 'int([[]]int)' is a function.
+ // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
+ // considered to be a type, not a K&R identifier-list.
+ isGrouping = false;
+ } else {
+ // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
+ isGrouping = true;
+ }
+
+ // If this is a grouping paren, handle:
+ // direct-declarator: '(' declarator ')'
+ // direct-declarator: '(' attributes declarator ')'
+ if (isGrouping) {
+ SourceLocation EllipsisLoc = D.getEllipsisLoc();
+ D.setEllipsisLoc(SourceLocation());
+
+ bool hadGroupingParens = D.hasGroupingParens();
+ D.setGroupingParens(true);
+ ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
+ // Match the ')'.
+ T.consumeClose();
+ D.AddTypeInfo(DeclaratorChunk::getParen(T.getOpenLocation(),
+ T.getCloseLocation()),
+ attrs, T.getCloseLocation());
+
+ D.setGroupingParens(hadGroupingParens);
+
+ // An ellipsis cannot be placed outside parentheses.
+ if (EllipsisLoc.isValid())
+ diagnoseMisplacedEllipsis(*this, D, EllipsisLoc);
+
+ return;
+ }
+
+ // Okay, if this wasn't a grouping paren, it must be the start of a function
+ // argument list. Recognize that this declarator will never have an
+ // identifier (and remember where it would have been), then call into
+ // ParseFunctionDeclarator to handle of argument list.
+ D.SetIdentifier(0, Tok.getLocation());
+
+ // Enter function-declaration scope, limiting any declarators to the
+ // function prototype scope, including parameter declarators.
+ ParseScope PrototypeScope(this,
+ Scope::FunctionPrototypeScope|Scope::DeclScope);
+ ParseFunctionDeclarator(D, attrs, T, RequiresArg);
+ PrototypeScope.Exit();
+}
+
+/// ParseFunctionDeclarator - We are after the identifier and have parsed the
+/// declarator D up to a paren, which indicates that we are parsing function
+/// arguments.
+///
+/// If FirstArgAttrs is non-null, then the caller parsed those arguments
+/// immediately after the open paren - they should be considered to be the
+/// first argument of a parameter.
+///
+/// If RequiresArg is true, then the first argument of the function is required
+/// to be present and required to not be an identifier list.
+///
+/// For C++, after the parameter-list, it also parses the cv-qualifier-seq[opt],
+/// (C++11) ref-qualifier[opt], exception-specification[opt],
+/// (C++11) attribute-specifier-seq[opt], and (C++11) trailing-return-type[opt].
+///
+/// [C++11] exception-specification:
+/// dynamic-exception-specification
+/// noexcept-specification
+///
+void Parser::ParseFunctionDeclarator(Declarator &D,
+ ParsedAttributes &FirstArgAttrs,
+ BalancedDelimiterTracker &Tracker,
+ bool RequiresArg) {
+ assert(getCurScope()->isFunctionPrototypeScope() &&
+ "Should call from a Function scope");
+ // lparen is already consumed!
+ assert(D.isPastIdentifier() && "Should not call before identifier!");
+
+ // This should be true when the function has typed arguments.
+ // Otherwise, it is treated as a K&R-style function.
+ bool HasProto = false;
+ // Build up an array of information about the parsed arguments.
+ SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
+ // Remember where we see an ellipsis, if any.
+ SourceLocation EllipsisLoc;
+
+ DeclSpec DS(AttrFactory);
+ bool RefQualifierIsLValueRef = true;
+ SourceLocation RefQualifierLoc;
+ SourceLocation ConstQualifierLoc;
+ SourceLocation VolatileQualifierLoc;
+ ExceptionSpecificationType ESpecType = EST_None;
+ SourceRange ESpecRange;
+ SmallVector<ParsedType, 2> DynamicExceptions;
+ SmallVector<SourceRange, 2> DynamicExceptionRanges;
+ ExprResult NoexceptExpr;
+ ParsedAttributes FnAttrs(AttrFactory);
+ ParsedType TrailingReturnType;
+
+ Actions.ActOnStartFunctionDeclarator();
+
+ SourceLocation EndLoc;
+ if (isFunctionDeclaratorIdentifierList()) {
+ if (RequiresArg)
+ Diag(Tok, diag::err_argument_required_after_attribute);
+
+ ParseFunctionDeclaratorIdentifierList(D, ParamInfo);
+
+ Tracker.consumeClose();
+ EndLoc = Tracker.getCloseLocation();
+ } else {
+ if (Tok.isNot(tok::r_paren))
+ ParseParameterDeclarationClause(D, FirstArgAttrs, ParamInfo, EllipsisLoc);
+ else if (RequiresArg)
+ Diag(Tok, diag::err_argument_required_after_attribute);
+
+ HasProto = ParamInfo.size() || getLangOpts().CPlusPlus;
+
+ // If we have the closing ')', eat it.
+ Tracker.consumeClose();
+ EndLoc = Tracker.getCloseLocation();
+
+ if (getLangOpts().CPlusPlus) {
+ // FIXME: Accept these components in any order, and produce fixits to
+ // correct the order if the user gets it wrong. Ideally we should deal
+ // with the virt-specifier-seq and pure-specifier in the same way.
+
+ // Parse cv-qualifier-seq[opt].
+ ParseTypeQualifierListOpt(DS, false /*no attributes*/, false);
+ if (!DS.getSourceRange().getEnd().isInvalid()) {
+ EndLoc = DS.getSourceRange().getEnd();
+ ConstQualifierLoc = DS.getConstSpecLoc();
+ VolatileQualifierLoc = DS.getVolatileSpecLoc();
+ }
+
+ // Parse ref-qualifier[opt].
+ if (Tok.is(tok::amp) || Tok.is(tok::ampamp)) {
+ Diag(Tok, getLangOpts().CPlusPlus0x ?
+ diag::warn_cxx98_compat_ref_qualifier :
+ diag::ext_ref_qualifier);
+
+ RefQualifierIsLValueRef = Tok.is(tok::amp);
+ RefQualifierLoc = ConsumeToken();
+ EndLoc = RefQualifierLoc;
+ }
+
+ // C++11 [expr.prim.general]p3:
+ // If a declaration declares a member function or member function
+ // template of a class X, the expression this is a prvalue of type
+ // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
+ // and the end of the function-definition, member-declarator, or
+ // declarator.
+ bool IsCXX11MemberFunction =
+ getLangOpts().CPlusPlus0x &&
+ (D.getContext() == Declarator::MemberContext ||
+ (D.getContext() == Declarator::FileContext &&
+ D.getCXXScopeSpec().isValid() &&
+ Actions.CurContext->isRecord()));
+ Sema::CXXThisScopeRAII ThisScope(Actions,
+ dyn_cast<CXXRecordDecl>(Actions.CurContext),
+ DS.getTypeQualifiers(),
+ IsCXX11MemberFunction);
+
+ // Parse exception-specification[opt].
+ ESpecType = tryParseExceptionSpecification(ESpecRange,
+ DynamicExceptions,
+ DynamicExceptionRanges,
+ NoexceptExpr);
+ if (ESpecType != EST_None)
+ EndLoc = ESpecRange.getEnd();
+
+ // Parse attribute-specifier-seq[opt]. Per DR 979 and DR 1297, this goes
+ // after the exception-specification.
+ MaybeParseCXX0XAttributes(FnAttrs);
+
+ // Parse trailing-return-type[opt].
+ if (getLangOpts().CPlusPlus0x && Tok.is(tok::arrow)) {
+ Diag(Tok, diag::warn_cxx98_compat_trailing_return_type);
+ SourceRange Range;
+ TrailingReturnType = ParseTrailingReturnType(Range).get();
+ if (Range.getEnd().isValid())
+ EndLoc = Range.getEnd();
+ }
+ }
+ }
+
+ // Remember that we parsed a function type, and remember the attributes.
+ D.AddTypeInfo(DeclaratorChunk::getFunction(HasProto,
+ /*isVariadic=*/EllipsisLoc.isValid(),
+ EllipsisLoc,
+ ParamInfo.data(), ParamInfo.size(),
+ DS.getTypeQualifiers(),
+ RefQualifierIsLValueRef,
+ RefQualifierLoc, ConstQualifierLoc,
+ VolatileQualifierLoc,
+ /*MutableLoc=*/SourceLocation(),
+ ESpecType, ESpecRange.getBegin(),
+ DynamicExceptions.data(),
+ DynamicExceptionRanges.data(),
+ DynamicExceptions.size(),
+ NoexceptExpr.isUsable() ?
+ NoexceptExpr.get() : 0,
+ Tracker.getOpenLocation(),
+ EndLoc, D,
+ TrailingReturnType),
+ FnAttrs, EndLoc);
+
+ Actions.ActOnEndFunctionDeclarator();
+}
+
+/// isFunctionDeclaratorIdentifierList - This parameter list may have an
+/// identifier list form for a K&R-style function: void foo(a,b,c)
+///
+/// Note that identifier-lists are only allowed for normal declarators, not for
+/// abstract-declarators.
+bool Parser::isFunctionDeclaratorIdentifierList() {
+ return !getLangOpts().CPlusPlus
+ && Tok.is(tok::identifier)
+ && !TryAltiVecVectorToken()
+ // K&R identifier lists can't have typedefs as identifiers, per C99
+ // 6.7.5.3p11.
+ && (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename))
+ // Identifier lists follow a really simple grammar: the identifiers can
+ // be followed *only* by a ", identifier" or ")". However, K&R
+ // identifier lists are really rare in the brave new modern world, and
+ // it is very common for someone to typo a type in a non-K&R style
+ // list. If we are presented with something like: "void foo(intptr x,
+ // float y)", we don't want to start parsing the function declarator as
+ // though it is a K&R style declarator just because intptr is an
+ // invalid type.
+ //
+ // To handle this, we check to see if the token after the first
+ // identifier is a "," or ")". Only then do we parse it as an
+ // identifier list.
+ && (NextToken().is(tok::comma) || NextToken().is(tok::r_paren));
+}
+
+/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
+/// we found a K&R-style identifier list instead of a typed parameter list.
+///
+/// After returning, ParamInfo will hold the parsed parameters.
+///
+/// identifier-list: [C99 6.7.5]
+/// identifier
+/// identifier-list ',' identifier
+///
+void Parser::ParseFunctionDeclaratorIdentifierList(
+ Declarator &D,
+ SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo) {
+ // If there was no identifier specified for the declarator, either we are in
+ // an abstract-declarator, or we are in a parameter declarator which was found
+ // to be abstract. In abstract-declarators, identifier lists are not valid:
+ // diagnose this.
+ if (!D.getIdentifier())
+ Diag(Tok, diag::ext_ident_list_in_param);
+
+ // Maintain an efficient lookup of params we have seen so far.
+ llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
+
+ while (1) {
+ // If this isn't an identifier, report the error and skip until ')'.
+ if (Tok.isNot(tok::identifier)) {
+ Diag(Tok, diag::err_expected_ident);
+ SkipUntil(tok::r_paren, /*StopAtSemi=*/true, /*DontConsume=*/true);
+ // Forget we parsed anything.
+ ParamInfo.clear();
+ return;
+ }
+
+ IdentifierInfo *ParmII = Tok.getIdentifierInfo();
+
+ // Reject 'typedef int y; int test(x, y)', but continue parsing.
+ if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope()))
+ Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
+
+ // Verify that the argument identifier has not already been mentioned.
+ if (!ParamsSoFar.insert(ParmII)) {
+ Diag(Tok, diag::err_param_redefinition) << ParmII;
+ } else {
+ // Remember this identifier in ParamInfo.
+ ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
+ Tok.getLocation(),
+ 0));
+ }
+
+ // Eat the identifier.
+ ConsumeToken();
+
+ // The list continues if we see a comma.
+ if (Tok.isNot(tok::comma))
+ break;
+ ConsumeToken();
+ }
+}
+
+/// ParseParameterDeclarationClause - Parse a (possibly empty) parameter-list
+/// after the opening parenthesis. This function will not parse a K&R-style
+/// identifier list.
+///
+/// D is the declarator being parsed. If FirstArgAttrs is non-null, then the
+/// caller parsed those arguments immediately after the open paren - they should
+/// be considered to be part of the first parameter.
+///
+/// After returning, ParamInfo will hold the parsed parameters. EllipsisLoc will
+/// be the location of the ellipsis, if any was parsed.
+///
+/// parameter-type-list: [C99 6.7.5]
+/// parameter-list
+/// parameter-list ',' '...'
+/// [C++] parameter-list '...'
+///
+/// parameter-list: [C99 6.7.5]
+/// parameter-declaration
+/// parameter-list ',' parameter-declaration
+///
+/// parameter-declaration: [C99 6.7.5]
+/// declaration-specifiers declarator
+/// [C++] declaration-specifiers declarator '=' assignment-expression
+/// [C++11] initializer-clause
+/// [GNU] declaration-specifiers declarator attributes
+/// declaration-specifiers abstract-declarator[opt]
+/// [C++] declaration-specifiers abstract-declarator[opt]
+/// '=' assignment-expression
+/// [GNU] declaration-specifiers abstract-declarator[opt] attributes
+/// [C++11] attribute-specifier-seq parameter-declaration
+///
+void Parser::ParseParameterDeclarationClause(
+ Declarator &D,
+ ParsedAttributes &FirstArgAttrs,
+ SmallVector<DeclaratorChunk::ParamInfo, 16> &ParamInfo,
+ SourceLocation &EllipsisLoc) {
+
+ while (1) {
+ if (Tok.is(tok::ellipsis)) {
+ // FIXME: Issue a diagnostic if we parsed an attribute-specifier-seq
+ // before deciding this was a parameter-declaration-clause.
+ EllipsisLoc = ConsumeToken(); // Consume the ellipsis.
+ break;
+ }
+
+ // Parse the declaration-specifiers.
+ // Just use the ParsingDeclaration "scope" of the declarator.
+ DeclSpec DS(AttrFactory);
+
+ // Parse any C++11 attributes.
+ MaybeParseCXX0XAttributes(DS.getAttributes());
+
+ // Skip any Microsoft attributes before a param.
+ if (getLangOpts().MicrosoftExt && Tok.is(tok::l_square))
+ ParseMicrosoftAttributes(DS.getAttributes());
+
+ SourceLocation DSStart = Tok.getLocation();
+
+ // If the caller parsed attributes for the first argument, add them now.
+ // Take them so that we only apply the attributes to the first parameter.
+ // FIXME: If we can leave the attributes in the token stream somehow, we can
+ // get rid of a parameter (FirstArgAttrs) and this statement. It might be
+ // too much hassle.
+ DS.takeAttributesFrom(FirstArgAttrs);
+
+ ParseDeclarationSpecifiers(DS);
+
+ // Parse the declarator. This is "PrototypeContext", because we must
+ // accept either 'declarator' or 'abstract-declarator' here.
+ Declarator ParmDecl(DS, Declarator::PrototypeContext);
+ ParseDeclarator(ParmDecl);
+
+ // Parse GNU attributes, if present.
+ MaybeParseGNUAttributes(ParmDecl);
+
+ // Remember this parsed parameter in ParamInfo.
+ IdentifierInfo *ParmII = ParmDecl.getIdentifier();
+
+ // DefArgToks is used when the parsing of default arguments needs
+ // to be delayed.
+ CachedTokens *DefArgToks = 0;
+
+ // If no parameter was specified, verify that *something* was specified,
+ // otherwise we have a missing type and identifier.
+ if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 &&
+ ParmDecl.getNumTypeObjects() == 0) {
+ // Completely missing, emit error.
+ Diag(DSStart, diag::err_missing_param);
+ } else {
+ // Otherwise, we have something. Add it and let semantic analysis try
+ // to grok it and add the result to the ParamInfo we are building.
+
+ // Inform the actions module about the parameter declarator, so it gets
+ // added to the current scope.
+ Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl);
+
+ // Parse the default argument, if any. We parse the default
+ // arguments in all dialects; the semantic analysis in
+ // ActOnParamDefaultArgument will reject the default argument in
+ // C.
+ if (Tok.is(tok::equal)) {
+ SourceLocation EqualLoc = Tok.getLocation();
+
+ // Parse the default argument
+ if (D.getContext() == Declarator::MemberContext) {
+ // If we're inside a class definition, cache the tokens
+ // corresponding to the default argument. We'll actually parse
+ // them when we see the end of the class definition.
+ // FIXME: Can we use a smart pointer for Toks?
+ DefArgToks = new CachedTokens;
+
+ if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks,
+ /*StopAtSemi=*/true,
+ /*ConsumeFinalToken=*/false)) {
+ delete DefArgToks;
+ DefArgToks = 0;
+ Actions.ActOnParamDefaultArgumentError(Param);
+ } else {
+ // Mark the end of the default argument so that we know when to
+ // stop when we parse it later on.
+ Token DefArgEnd;
+ DefArgEnd.startToken();
+ DefArgEnd.setKind(tok::cxx_defaultarg_end);
+ DefArgEnd.setLocation(Tok.getLocation());
+ DefArgToks->push_back(DefArgEnd);
+ Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc,
+ (*DefArgToks)[1].getLocation());
+ }
+ } else {
+ // Consume the '='.
+ ConsumeToken();
+
+ // The argument isn't actually potentially evaluated unless it is
+ // used.
+ EnterExpressionEvaluationContext Eval(Actions,
+ Sema::PotentiallyEvaluatedIfUsed,
+ Param);
+
+ ExprResult DefArgResult;
+ if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) {
+ Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
+ DefArgResult = ParseBraceInitializer();
+ } else
+ DefArgResult = ParseAssignmentExpression();
+ if (DefArgResult.isInvalid()) {
+ Actions.ActOnParamDefaultArgumentError(Param);
+ SkipUntil(tok::comma, tok::r_paren, true, true);
+ } else {
+ // Inform the actions module about the default argument
+ Actions.ActOnParamDefaultArgument(Param, EqualLoc,
+ DefArgResult.take());
+ }
+ }
+ }
+
+ ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
+ ParmDecl.getIdentifierLoc(), Param,
+ DefArgToks));
+ }
+
+ // If the next token is a comma, consume it and keep reading arguments.
+ if (Tok.isNot(tok::comma)) {
+ if (Tok.is(tok::ellipsis)) {
+ EllipsisLoc = ConsumeToken(); // Consume the ellipsis.
+
+ if (!getLangOpts().CPlusPlus) {
+ // We have ellipsis without a preceding ',', which is ill-formed
+ // in C. Complain and provide the fix.
+ Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis)
+ << FixItHint::CreateInsertion(EllipsisLoc, ", ");
+ }
+ }
+
+ break;
+ }
+
+ // Consume the comma.
+ ConsumeToken();
+ }
+
+}
+
+/// [C90] direct-declarator '[' constant-expression[opt] ']'
+/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
+/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
+/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
+/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
+/// [C++11] direct-declarator '[' constant-expression[opt] ']'
+/// attribute-specifier-seq[opt]
+void Parser::ParseBracketDeclarator(Declarator &D) {
+ if (CheckProhibitedCXX11Attribute())
+ return;
+
+ BalancedDelimiterTracker T(*this, tok::l_square);
+ T.consumeOpen();
+
+ // C array syntax has many features, but by-far the most common is [] and [4].
+ // This code does a fast path to handle some of the most obvious cases.
+ if (Tok.getKind() == tok::r_square) {
+ T.consumeClose();
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(attrs);
+
+ // Remember that we parsed the empty array type.
+ ExprResult NumElements;
+ D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0,
+ T.getOpenLocation(),
+ T.getCloseLocation()),
+ attrs, T.getCloseLocation());
+ return;
+ } else if (Tok.getKind() == tok::numeric_constant &&
+ GetLookAheadToken(1).is(tok::r_square)) {
+ // [4] is very common. Parse the numeric constant expression.
+ ExprResult ExprRes(Actions.ActOnNumericConstant(Tok, getCurScope()));
+ ConsumeToken();
+
+ T.consumeClose();
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(attrs);
+
+ // Remember that we parsed a array type, and remember its features.
+ D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0,
+ ExprRes.release(),
+ T.getOpenLocation(),
+ T.getCloseLocation()),
+ attrs, T.getCloseLocation());
+ return;
+ }
+
+ // If valid, this location is the position where we read the 'static' keyword.
+ SourceLocation StaticLoc;
+ if (Tok.is(tok::kw_static))
+ StaticLoc = ConsumeToken();
+
+ // If there is a type-qualifier-list, read it now.
+ // Type qualifiers in an array subscript are a C99 feature.
+ DeclSpec DS(AttrFactory);
+ ParseTypeQualifierListOpt(DS, false /*no attributes*/);
+
+ // If we haven't already read 'static', check to see if there is one after the
+ // type-qualifier-list.
+ if (!StaticLoc.isValid() && Tok.is(tok::kw_static))
+ StaticLoc = ConsumeToken();
+
+ // Handle "direct-declarator [ type-qual-list[opt] * ]".
+ bool isStar = false;
+ ExprResult NumElements;
+
+ // Handle the case where we have '[*]' as the array size. However, a leading
+ // star could be the start of an expression, for example 'X[*p + 4]'. Verify
+ // the the token after the star is a ']'. Since stars in arrays are
+ // infrequent, use of lookahead is not costly here.
+ if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
+ ConsumeToken(); // Eat the '*'.
+
+ if (StaticLoc.isValid()) {
+ Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
+ StaticLoc = SourceLocation(); // Drop the static.
+ }
+ isStar = true;
+ } else if (Tok.isNot(tok::r_square)) {
+ // Note, in C89, this production uses the constant-expr production instead
+ // of assignment-expr. The only difference is that assignment-expr allows
+ // things like '=' and '*='. Sema rejects these in C89 mode because they
+ // are not i-c-e's, so we don't need to distinguish between the two here.
+
+ // Parse the constant-expression or assignment-expression now (depending
+ // on dialect).
+ if (getLangOpts().CPlusPlus) {
+ NumElements = ParseConstantExpression();
+ } else {
+ EnterExpressionEvaluationContext Unevaluated(Actions,
+ Sema::ConstantEvaluated);
+ NumElements = ParseAssignmentExpression();
+ }
+ }
+
+ // If there was an error parsing the assignment-expression, recover.
+ if (NumElements.isInvalid()) {
+ D.setInvalidType(true);
+ // If the expression was invalid, skip it.
+ SkipUntil(tok::r_square);
+ return;
+ }
+
+ T.consumeClose();
+
+ ParsedAttributes attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(attrs);
+
+ // Remember that we parsed a array type, and remember its features.
+ D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
+ StaticLoc.isValid(), isStar,
+ NumElements.release(),
+ T.getOpenLocation(),
+ T.getCloseLocation()),
+ attrs, T.getCloseLocation());
+}
+
+/// [GNU] typeof-specifier:
+/// typeof ( expressions )
+/// typeof ( type-name )
+/// [GNU/C++] typeof unary-expression
+///
+void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
+ assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
+ Token OpTok = Tok;
+ SourceLocation StartLoc = ConsumeToken();
+
+ const bool hasParens = Tok.is(tok::l_paren);
+
+ EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated);
+
+ bool isCastExpr;
+ ParsedType CastTy;
+ SourceRange CastRange;
+ ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok, isCastExpr,
+ CastTy, CastRange);
+ if (hasParens)
+ DS.setTypeofParensRange(CastRange);
+
+ if (CastRange.getEnd().isInvalid())
+ // FIXME: Not accurate, the range gets one token more than it should.
+ DS.SetRangeEnd(Tok.getLocation());
+ else
+ DS.SetRangeEnd(CastRange.getEnd());
+
+ if (isCastExpr) {
+ if (!CastTy) {
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ // Check for duplicate type specifiers (e.g. "int typeof(int)").
+ if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec,
+ DiagID, CastTy))
+ Diag(StartLoc, DiagID) << PrevSpec;
+ return;
+ }
+
+ // If we get here, the operand to the typeof was an expresion.
+ if (Operand.isInvalid()) {
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ // We might need to transform the operand if it is potentially evaluated.
+ Operand = Actions.HandleExprEvaluationContextForTypeof(Operand.get());
+ if (Operand.isInvalid()) {
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ // Check for duplicate type specifiers (e.g. "int typeof(int)").
+ if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
+ DiagID, Operand.get()))
+ Diag(StartLoc, DiagID) << PrevSpec;
+}
+
+/// [C11] atomic-specifier:
+/// _Atomic ( type-name )
+///
+void Parser::ParseAtomicSpecifier(DeclSpec &DS) {
+ assert(Tok.is(tok::kw__Atomic) && "Not an atomic specifier");
+
+ SourceLocation StartLoc = ConsumeToken();
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ if (T.expectAndConsume(diag::err_expected_lparen_after, "_Atomic")) {
+ SkipUntil(tok::r_paren);
+ return;
+ }
+
+ TypeResult Result = ParseTypeName();
+ if (Result.isInvalid()) {
+ SkipUntil(tok::r_paren);
+ return;
+ }
+
+ // Match the ')'
+ T.consumeClose();
+
+ if (T.getCloseLocation().isInvalid())
+ return;
+
+ DS.setTypeofParensRange(T.getRange());
+ DS.SetRangeEnd(T.getCloseLocation());
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ if (DS.SetTypeSpecType(DeclSpec::TST_atomic, StartLoc, PrevSpec,
+ DiagID, Result.release()))
+ Diag(StartLoc, DiagID) << PrevSpec;
+}
+
+
+/// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called
+/// from TryAltiVecVectorToken.
+bool Parser::TryAltiVecVectorTokenOutOfLine() {
+ Token Next = NextToken();
+ switch (Next.getKind()) {
+ default: return false;
+ case tok::kw_short:
+ case tok::kw_long:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw_void:
+ case tok::kw_char:
+ case tok::kw_int:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_bool:
+ case tok::kw___pixel:
+ Tok.setKind(tok::kw___vector);
+ return true;
+ case tok::identifier:
+ if (Next.getIdentifierInfo() == Ident_pixel) {
+ Tok.setKind(tok::kw___vector);
+ return true;
+ }
+ return false;
+ }
+}
+
+bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
+ const char *&PrevSpec, unsigned &DiagID,
+ bool &isInvalid) {
+ if (Tok.getIdentifierInfo() == Ident_vector) {
+ Token Next = NextToken();
+ switch (Next.getKind()) {
+ case tok::kw_short:
+ case tok::kw_long:
+ case tok::kw_signed:
+ case tok::kw_unsigned:
+ case tok::kw_void:
+ case tok::kw_char:
+ case tok::kw_int:
+ case tok::kw_float:
+ case tok::kw_double:
+ case tok::kw_bool:
+ case tok::kw___pixel:
+ isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
+ return true;
+ case tok::identifier:
+ if (Next.getIdentifierInfo() == Ident_pixel) {
+ isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID);
+ return true;
+ }
+ break;
+ default:
+ break;
+ }
+ } else if ((Tok.getIdentifierInfo() == Ident_pixel) &&
+ DS.isTypeAltiVecVector()) {
+ isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID);
+ return true;
+ }
+ return false;
+}