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Unify the code for defining tags in C and C++, so that we always 

introduce a Scope for the body of a tag. This reduces the number of
semantic differences between C and C++ structs and unions, and will
help with other features (e.g., anonymous unions) in C. Some important
points:

  - Fields are now in the "member" namespace (IDNS_Member), to keep
    them separate from tags and ordinary names in C. See the new test
    in Sema/member-reference.c for an example of why this matters. In
    C++, ordinary and member name lookup will find members in both the
    ordinary and member namespace, so the difference between
    IDNS_Member and IDNS_Ordinary is erased by Sema::LookupDecl (but
    only in C++!). 
  - We always introduce a Scope and push a DeclContext when we're
    defining a tag, in both C and C++. Previously, we had different
    actions and different Scope/CurContext behavior for enums, C
    structs/unions, and C++ structs/unions/classes. Now, it's one pair
    of actions. (Yay!)

There's still some fuzziness in the handling of struct/union/enum
definitions within other struct/union/enum definitions in C. We'll
need to do some more cleanup to eliminate some reliance on CurContext
before we can solve this issue for real. What we want is for something
like this:

  struct X {
    struct T { int x; } t;
  };

to introduce T into translation unit scope (placing it at the
appropriate point in the IdentifierResolver chain, too), but it should
still have struct X as its lexical declaration
context. PushOnScopeChains isn't smart enough to do that yet, though,
so there's a FIXME test in nested-redef.c

llvm-svn: 61940
This commit is contained in:
Douglas Gregor 2009-01-08 20:45:30 +00:00
parent 40e1fd1f79
commit 82ac25e4a7
20 changed files with 228 additions and 154 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
clang/include/clang/AST/Decl.h
View File

@ -900,7 +900,7 @@ protected:
/// TagDecl - Represents the declaration of a struct/union/class/enum.
class TagDecl : public TypeDecl {
class TagDecl : public TypeDecl, public DeclContext {
public:
enum TagKind {
TK_struct,
@ -919,7 +919,7 @@ private:
protected:
TagDecl(Kind DK, TagKind TK, DeclContext *DC, SourceLocation L,
IdentifierInfo *Id, ScopedDecl *PrevDecl)
: TypeDecl(DK, DC, L, Id, PrevDecl) {
: TypeDecl(DK, DC, L, Id, PrevDecl), DeclContext(DK) {
assert((DK != Enum || TK == TK_enum) &&"EnumDecl not matched with TK_enum");
TagDeclKind = TK;
IsDefinition = false;
@ -970,7 +970,7 @@ protected:
/// EnumDecl - Represents an enum. As an extension, we allow forward-declared
/// enums.
class EnumDecl : public TagDecl, public DeclContext {
class EnumDecl : public TagDecl {
/// IntegerType - This represent the integer type that the enum corresponds
/// to for code generation purposes. Note that the enumerator constants may
/// have a different type than this does.
@ -978,7 +978,7 @@ class EnumDecl : public TagDecl, public DeclContext {
EnumDecl(DeclContext *DC, SourceLocation L,
IdentifierInfo *Id, ScopedDecl *PrevDecl)
: TagDecl(Enum, TK_enum, DC, L, Id, PrevDecl), DeclContext(Enum) {
: TagDecl(Enum, TK_enum, DC, L, Id, PrevDecl) {
IntegerType = QualType();
}
public:
@ -1053,7 +1053,7 @@ protected:
/// union Y { int A, B; }; // Has body with members A and B (FieldDecls).
/// This decl will be marked invalid if *any* members are invalid.
///
class RecordDecl : public TagDecl, public DeclContext {
class RecordDecl : public TagDecl {
/// HasFlexibleArrayMember - This is true if this struct ends with a flexible
/// array member (e.g. int X[]) or if this union contains a struct that does.
/// If so, this cannot be contained in arrays or other structs as a member.

15
clang/include/clang/AST/DeclBase.h
View File

@ -68,9 +68,9 @@ public:
Namespace, // [DeclContext]
// TypeDecl
Typedef,
// TagDecl
Enum, // [DeclContext]
Record, // [DeclContext]
// TagDecl // [DeclContext]
Enum,
Record,
CXXRecord,
TemplateTypeParm,
// ValueDecl
@ -206,9 +206,6 @@ public:
case OriginalParmVar:
case EnumConstant:
case NonTypeTemplateParm:
case Field:
case ObjCAtDefsField:
case ObjCIvar:
case ObjCInterface:
case ObjCCompatibleAlias:
case OverloadedFunction:
@ -216,6 +213,12 @@ public:
case CXXConversion:
case CXXClassVar:
return IDNS_Ordinary;
case Field:
case ObjCAtDefsField:
case ObjCIvar:
return IDNS_Member;
case Record:
case CXXRecord:
case TemplateTypeParm:

23
clang/include/clang/Parse/Action.h
View File

@ -341,10 +341,14 @@ public:
SourceLocation LBrac, SourceLocation RBrac,
AttributeList *AttrList) {}
/// ActOnEnumStartDefinition - Invoked when we have entered the
/// scope of the enumeration body and will be parsing its
/// enumerators.
virtual void ActOnEnumStartDefinition(Scope *S, DeclTy *EnumDecl) { }
/// ActOnTagStartDefinition - Invoked when we have entered the
/// scope of a tag's definition (e.g., for an enumeration, class,
/// struct, or union).
virtual void ActOnTagStartDefinition(Scope *S, DeclTy *TagDecl) { }
/// ActOnTagFinishDefinition - Invoked once we have finished parsing
/// the definition of a tag (enumeration, class, struct, or union).
virtual void ActOnTagFinishDefinition(Scope *S, DeclTy *TagDecl) { }
virtual DeclTy *ActOnEnumConstant(Scope *S, DeclTy *EnumDecl,
DeclTy *LastEnumConstant,
@ -915,12 +919,6 @@ public:
unsigned NumBases) {
}
/// ActOnStartCXXClassDef - This is called at the start of a class/struct/union
/// definition, when on C++.
virtual void ActOnStartCXXClassDef(Scope *S, DeclTy *TagDecl,
SourceLocation LBrace) {
}
/// ActOnCXXMemberDeclarator - This is invoked when a C++ class member
/// declarator is parsed. 'AS' is the access specifier, 'BitfieldWidth'
/// specifies the bitfield width if there is one and 'Init' specifies the
@ -962,11 +960,6 @@ public:
SourceLocation RBrac) {
}
/// ActOnFinishCXXClassDef - This is called when a class/struct/union has
/// completed parsing, when on C++.
virtual void ActOnFinishCXXClassDef(DeclTy *TagDecl) {
}
//===---------------------------C++ Templates----------------------------===//
/// ActOnTypeParameter - Called when a C++ template type parameter

3
clang/lib/AST/Decl.cpp
View File

@ -314,8 +314,7 @@ TagDecl* TagDecl::getDefinition(ASTContext& C) const {
RecordDecl::RecordDecl(Kind DK, TagKind TK, DeclContext *DC, SourceLocation L,
IdentifierInfo *Id)
: TagDecl(DK, TK, DC, L, Id, 0), DeclContext(DK) {
: TagDecl(DK, TK, DC, L, Id, 0) {
HasFlexibleArrayMember = false;
AnonymousStructOrUnion = false;
assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!");

1
clang/lib/AST/DeclBase.cpp
View File

@ -579,6 +579,7 @@ DeclContext::lookup(DeclarationName Name) const {
const DeclContext *DeclContext::getLookupContext() const {
const DeclContext *Ctx = this;
// Skip through transparent contexts.
while (Ctx->isTransparentContext())
Ctx = Ctx->getParent();
return Ctx;

12
clang/lib/Parse/ParseDecl.cpp
View File

@ -948,6 +948,9 @@ void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
unsigned TagType, DeclTy *TagDecl) {
SourceLocation LBraceLoc = ConsumeBrace();
ParseScope StructScope(this, Scope::DeclScope);
Actions.ActOnTagStartDefinition(CurScope, TagDecl);
// Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in
// C++.
if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
@ -1027,7 +1030,9 @@ void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
Actions.ActOnFields(CurScope,
RecordLoc,TagDecl,&FieldDecls[0],FieldDecls.size(),
LBraceLoc, RBraceLoc,
AttrList);
AttrList);
StructScope.Exit();
Actions.ActOnTagFinishDefinition(CurScope, TagDecl);
}
@ -1125,7 +1130,7 @@ void Parser::ParseEnumSpecifier(DeclSpec &DS) {
void Parser::ParseEnumBody(SourceLocation StartLoc, DeclTy *EnumDecl) {
// Enter the scope of the enum body and start the definition.
ParseScope EnumScope(this, Scope::DeclScope);
Actions.ActOnEnumStartDefinition(CurScope, EnumDecl);
Actions.ActOnTagStartDefinition(CurScope, EnumDecl);
SourceLocation LBraceLoc = ConsumeBrace();
@ -1178,6 +1183,9 @@ void Parser::ParseEnumBody(SourceLocation StartLoc, DeclTy *EnumDecl) {
// If attributes exist after the identifier list, parse them.
if (Tok.is(tok::kw___attribute))
AttrList = ParseAttributes(); // FIXME: where do they do?
EnumScope.Exit();
Actions.ActOnTagFinishDefinition(CurScope, EnumDecl);
}
/// isTypeSpecifierQualifier - Return true if the current token could be the

4
clang/lib/Parse/ParseDeclCXX.cpp
View File

@ -730,7 +730,7 @@ void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
// Enter a scope for the class.
ParseScope ClassScope(this, Scope::CXXClassScope|Scope::DeclScope);
Actions.ActOnStartCXXClassDef(CurScope, TagDecl, LBraceLoc);
Actions.ActOnTagStartDefinition(CurScope, TagDecl);
// C++ 11p3: Members of a class defined with the keyword class are private
// by default. Members of a class defined with the keywords struct or union
@ -802,7 +802,7 @@ void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
// Leave the class scope.
ClassScope.Exit();
Actions.ActOnFinishCXXClassDef(TagDecl);
Actions.ActOnTagFinishDefinition(CurScope, TagDecl);
}
/// ParseConstructorInitializer - Parse a C++ constructor initializer,

2
clang/lib/Parse/ParseObjc.cpp
View File

@ -840,6 +840,8 @@ void Parser::ParseObjCClassInstanceVariables(DeclTy *interfaceDecl,
llvm::SmallVector<DeclTy*, 32> AllIvarDecls;
llvm::SmallVector<FieldDeclarator, 8> FieldDeclarators;
ParseScope ClassScope(this, Scope::DeclScope);
SourceLocation LBraceLoc = ConsumeBrace(); // the "{"
tok::ObjCKeywordKind visibility = tok::objc_protected;

3
clang/lib/Sema/IdentifierResolver.cpp
View File

@ -60,6 +60,9 @@ DeclContext *IdentifierResolver::LookupContext::getContext(Decl *D) {
else
return TUCtx();
if (!Ctx) // FIXME: HACK! We shouldn't end up with a NULL context here.
return TUCtx();
Ctx = Ctx->getLookupContext();
if (isa<TranslationUnitDecl>(Ctx))

16
clang/lib/Sema/Sema.h
View File

@ -327,7 +327,16 @@ public:
DeclTy **Fields, unsigned NumFields,
SourceLocation LBrac, SourceLocation RBrac,
AttributeList *AttrList);
virtual void ActOnEnumStartDefinition(Scope *S, DeclTy *EnumDecl);
/// ActOnTagStartDefinition - Invoked when we have entered the
/// scope of a tag's definition (e.g., for an enumeration, class,
/// struct, or union).
virtual void ActOnTagStartDefinition(Scope *S, DeclTy *TagDecl);
/// ActOnTagFinishDefinition - Invoked once we have finished parsing
/// the definition of a tag (enumeration, class, struct, or union).
virtual void ActOnTagFinishDefinition(Scope *S, DeclTy *TagDecl);
virtual DeclTy *ActOnEnumConstant(Scope *S, DeclTy *EnumDecl,
DeclTy *LastEnumConstant,
SourceLocation IdLoc, IdentifierInfo *Id,
@ -1017,9 +1026,6 @@ public:
virtual bool isCurrentClassName(const IdentifierInfo &II, Scope *S,
const CXXScopeSpec *SS);
virtual void ActOnStartCXXClassDef(Scope *S, DeclTy *TagDecl,
SourceLocation LBrace);
virtual DeclTy *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
Declarator &D, ExprTy *BitfieldWidth,
ExprTy *Init, DeclTy *LastInGroup);
@ -1040,8 +1046,6 @@ public:
SourceLocation LBrac,
SourceLocation RBrac);
virtual void ActOnFinishCXXClassDef(DeclTy *TagDecl);
virtual void ActOnStartDelayedCXXMethodDeclaration(Scope *S, DeclTy *Method);
virtual void ActOnDelayedCXXMethodParameter(Scope *S, DeclTy *Param);
virtual void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, DeclTy *Method);

2
clang/lib/Sema/SemaCXXScopeSpec.cpp
View File

@ -28,7 +28,7 @@ namespace {
DeclContext::lookup_const_iterator I, E;
for (llvm::tie(I, E) = LookupCtx->lookup(Name); I != E; ++I) {
IdIsUndeclared = false;
if (((*I)->getIdentifierNamespace() & Decl::IDNS_Tag) ||
if (((*I)->isInIdentifierNamespace(Decl::IDNS_Tag)) ||
isa<TypedefDecl>(*I))
return *I;
}

199
clang/lib/Sema/SemaDecl.cpp
View File

@ -263,18 +263,37 @@ Decl *Sema::LookupDecl(DeclarationName Name, unsigned NSI, Scope *S,
bool NamespaceNameOnly) {
if (!Name) return 0;
unsigned NS = NSI;
if (getLangOptions().CPlusPlus && (NS & Decl::IDNS_Ordinary))
NS |= Decl::IDNS_Tag;
if (LookupCtx == 0 &&
(!getLangOptions().CPlusPlus || (NS == Decl::IDNS_Label))) {
// Unqualified name lookup in C/Objective-C and name lookup for
// labels in C++ is purely lexical, so search in the
// declarations attached to the name.
// In C++, ordinary and member lookup will always find all
// kinds of names.
if (getLangOptions().CPlusPlus &&
(NS & (Decl::IDNS_Ordinary | Decl::IDNS_Member)))
NS |= Decl::IDNS_Tag | Decl::IDNS_Member | Decl::IDNS_Ordinary;
if (LookupCtx == 0 && !getLangOptions().CPlusPlus) {
// Unqualified name lookup in C/Objective-C is purely lexical, so
// search in the declarations attached to the name.
assert(!LookupCtx && "Can't perform qualified name lookup here");
assert(!NamespaceNameOnly && "Can't perform namespace name lookup here");
// For the purposes of unqualified name lookup, structs and unions
// don't have scopes at all. For example:
//
// struct X {
// struct T { int i; } x;
// };
//
// void f() {
// struct T t; // okay: T is defined lexically within X, but
// // semantically at global scope
// };
//
// FIXME: Is there a better way to deal with this?
DeclContext *SearchCtx = CurContext;
while (isa<RecordDecl>(SearchCtx) || isa<EnumDecl>(SearchCtx))
SearchCtx = SearchCtx->getParent();
IdentifierResolver::iterator I
= IdResolver.begin(Name, CurContext, LookInParent);
= IdResolver.begin(Name, SearchCtx, LookInParent);
// Scan up the scope chain looking for a decl that matches this
// identifier that is in the appropriate namespace. This search
@ -284,6 +303,11 @@ Decl *Sema::LookupDecl(DeclarationName Name, unsigned NSI, Scope *S,
if ((*I)->isInIdentifierNamespace(NS))
return *I;
} else if (LookupCtx) {
// If we're performing qualified name lookup (e.g., lookup into a
// struct), find fields as part of ordinary name lookup.
if (NS & Decl::IDNS_Ordinary)
NS |= Decl::IDNS_Member;
// Perform qualified name lookup into the LookupCtx.
// FIXME: Will need to look into base classes and such.
DeclContext::lookup_const_iterator I, E;
@ -2852,6 +2876,15 @@ Sema::DeclTy *Sema::ActOnTag(Scope *S, unsigned TagType, TagKind TK,
// declaration or definition.
// Use ScopedDecl instead of TagDecl, because a NamespaceDecl may come up.
PrevDecl = dyn_cast_or_null<ScopedDecl>(LookupDecl(Name, Decl::IDNS_Tag,S));
if (!getLangOptions().CPlusPlus && TK != TK_Reference) {
// FIXME: This makes sure that we ignore the contexts associated
// with C structs, unions, and enums when looking for a matching
// tag declaration or definition. See the similar lookup tweak
// in Sema::LookupDecl; is there a better way to deal with this?
while (isa<RecordDecl>(DC) || isa<EnumDecl>(DC))
DC = DC->getParent();
}
}
if (PrevDecl && PrevDecl->isTemplateParameter()) {
@ -3007,6 +3040,43 @@ CreateNewDecl:
return New;
}
void Sema::ActOnTagStartDefinition(Scope *S, DeclTy *TagD) {
TagDecl *Tag = cast<TagDecl>((Decl *)TagD);
// Enter the tag context.
PushDeclContext(S, Tag);
if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Tag)) {
FieldCollector->StartClass();
if (Record->getIdentifier()) {
// C++ [class]p2:
// [...] The class-name is also inserted into the scope of the
// class itself; this is known as the injected-class-name. For
// purposes of access checking, the injected-class-name is treated
// as if it were a public member name.
RecordDecl *InjectedClassName
= CXXRecordDecl::Create(Context, Record->getTagKind(),
CurContext, Record->getLocation(),
Record->getIdentifier(), Record);
InjectedClassName->setImplicit();
PushOnScopeChains(InjectedClassName, S);
}
}
}
void Sema::ActOnTagFinishDefinition(Scope *S, DeclTy *TagD) {
TagDecl *Tag = cast<TagDecl>((Decl *)TagD);
if (isa<CXXRecordDecl>(Tag))
FieldCollector->FinishClass();
// Exit this scope of this tag's definition.
PopDeclContext();
// Notify the consumer that we've defined a tag.
Consumer.HandleTagDeclDefinition(Tag);
}
/// TryToFixInvalidVariablyModifiedType - Helper method to turn variable array
/// types into constant array types in certain situations which would otherwise
@ -3108,6 +3178,18 @@ Sema::DeclTy *Sema::ActOnField(Scope *S, DeclTy *TagD,
DeclSpec::SCS_mutable,
/*PrevDecl=*/0);
if (II) {
Decl *PrevDecl
= LookupDecl(II, Decl::IDNS_Member, S, 0, false, false, false);
if (PrevDecl && isDeclInScope(PrevDecl, CurContext, S)
&& !isa<TagDecl>(PrevDecl)) {
Diag(Loc, diag::err_duplicate_member) << II;
Diag(PrevDecl->getLocation(), diag::note_previous_declaration);
NewFD->setInvalidDecl();
Record->setInvalidDecl();
}
}
if (getLangOptions().CPlusPlus) {
CheckExtraCXXDefaultArguments(D);
if (!T->isPODType())
@ -3119,9 +3201,9 @@ Sema::DeclTy *Sema::ActOnField(Scope *S, DeclTy *TagD,
if (D.getInvalidType() || InvalidDecl)
NewFD->setInvalidDecl();
if (II && getLangOptions().CPlusPlus)
if (II) {
PushOnScopeChains(NewFD, S);
else
} else
Record->addDecl(Context, NewFD);
return NewFD;
@ -3146,6 +3228,7 @@ Sema::DeclTy *Sema::ActOnIvar(Scope *S,
SourceLocation DeclStart,
Declarator &D, ExprTy *BitfieldWidth,
tok::ObjCKeywordKind Visibility) {
IdentifierInfo *II = D.getIdentifier();
Expr *BitWidth = (Expr*)BitfieldWidth;
SourceLocation Loc = DeclStart;
@ -3188,12 +3271,30 @@ Sema::DeclTy *Sema::ActOnIvar(Scope *S,
ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, Loc, II, T, ac,
(Expr *)BitfieldWidth);
if (II) {
Decl *PrevDecl
= LookupDecl(II, Decl::IDNS_Member, S, 0, false, false, false);
if (PrevDecl && isDeclInScope(PrevDecl, CurContext, S)
&& !isa<TagDecl>(PrevDecl)) {
Diag(Loc, diag::err_duplicate_member) << II;
Diag(PrevDecl->getLocation(), diag::note_previous_declaration);
NewID->setInvalidDecl();
}
}
// Process attributes attached to the ivar.
ProcessDeclAttributes(NewID, D);
if (D.getInvalidType() || InvalidDecl)
NewID->setInvalidDecl();
if (II) {
// FIXME: When interfaces are DeclContexts, we'll need to add
// these to the interface.
S->AddDecl(NewID);
IdResolver.AddDecl(NewID);
}
return NewID;
}
@ -3206,27 +3307,26 @@ void Sema::ActOnFields(Scope* S,
assert(EnclosingDecl && "missing record or interface decl");
RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl);
if (Record)
if (RecordDecl* DefRecord = Record->getDefinition(Context)) {
if (Record) {
QualType RecordType = Context.getTypeDeclType(Record);
if (RecordType->getAsRecordType()->getDecl()->isDefinition()) {
RecordDecl *Def = RecordType->getAsRecordType()->getDecl();
// Diagnose code like:
// struct S { struct S {} X; };
// We discover this when we complete the outer S. Reject and ignore the
// outer S.
Diag(DefRecord->getLocation(), diag::err_nested_redefinition)
<< DefRecord->getDeclName();
Diag(Def->getLocation(), diag::err_nested_redefinition)
<< Def->getDeclName();
Diag(RecLoc, diag::note_previous_definition);
Record->setInvalidDecl();
return;
}
}
// Verify that all the fields are okay.
unsigned NumNamedMembers = 0;
llvm::SmallVector<FieldDecl*, 32> RecFields;
// FIXME: Eventually, we'd like to eliminate this in favor of
// checking for redeclarations on-the-fly.
llvm::DenseMap<const IdentifierInfo*, FieldDecl *> FieldIDs;
for (unsigned i = 0; i != NumFields; ++i) {
FieldDecl *FD = cast_or_null<FieldDecl>(static_cast<Decl*>(Fields[i]));
assert(FD && "missing field decl");
@ -3234,37 +3334,7 @@ void Sema::ActOnFields(Scope* S,
// Get the type for the field.
Type *FDTy = FD->getType().getTypePtr();
if (FD->isAnonymousStructOrUnion()) {
// We have found a field that represents an anonymous struct
// or union. Introduce all of the inner fields (recursively)
// into the list of fields we know about, so that we can produce
// an appropriate error message in cases like:
//
// struct X {
// union {
// int x;
// float f;
// };
// double x;
// };
llvm::SmallVector<FieldDecl *, 4> AnonStructUnionFields;
AnonStructUnionFields.push_back(FD);
while (!AnonStructUnionFields.empty()) {
FieldDecl *AnonField = AnonStructUnionFields.back();
AnonStructUnionFields.pop_back();
RecordDecl *AnonRecord
= AnonField->getType()->getAsRecordType()->getDecl();
for (RecordDecl::field_iterator F = AnonRecord->field_begin(),
FEnd = AnonRecord->field_end();
F != FEnd; ++F) {
if ((*F)->isAnonymousStructOrUnion())
AnonStructUnionFields.push_back(*F);
else if (const IdentifierInfo *II = (*F)->getIdentifier())
FieldIDs[II] = *F;
}
}
} else {
if (!FD->isAnonymousStructOrUnion()) {
// Remember all fields written by the user.
RecFields.push_back(FD);
}
@ -3340,28 +3410,13 @@ void Sema::ActOnFields(Scope* S,
continue;
}
// Keep track of the number of named members.
if (IdentifierInfo *II = FD->getIdentifier()) {
// Detect duplicate member names.
if (FieldIDs[II]) {
Diag(FD->getLocation(), diag::err_duplicate_member) << II;
// Find the previous decl.
Diag(FieldIDs[II]->getLocation(), diag::note_previous_definition);
FD->setInvalidDecl();
EnclosingDecl->setInvalidDecl();
continue;
}
if (FD->getIdentifier())
++NumNamedMembers;
FieldIDs[II] = FD;
}
}
// Okay, we successfully defined 'Record'.
if (Record) {
Record->completeDefinition(Context);
// If this is a C++ record, HandleTagDeclDefinition will be invoked in
// Sema::ActOnFinishCXXClassDef.
if (!isa<CXXRecordDecl>(Record))
Consumer.HandleTagDeclDefinition(Record);
} else {
ObjCIvarDecl **ClsFields = reinterpret_cast<ObjCIvarDecl**>(&RecFields[0]);
if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) {
@ -3376,7 +3431,7 @@ void Sema::ActOnFields(Scope* S,
ObjCIvarDecl* prevIvar = ID->getSuperClass()->FindIvarDeclaration(II);
if (prevIvar) {
Diag(Ivar->getLocation(), diag::err_duplicate_member) << II;
Diag(prevIvar->getLocation(), diag::note_previous_definition);
Diag(prevIvar->getLocation(), diag::note_previous_declaration);
}
}
}
@ -3393,13 +3448,6 @@ void Sema::ActOnFields(Scope* S,
ProcessDeclAttributeList(Record, Attr);
}
void Sema::ActOnEnumStartDefinition(Scope *S, DeclTy *EnumD) {
EnumDecl *Enum = cast<EnumDecl>((Decl *)EnumD);
// Enter the enumeration context.
PushDeclContext(S, Enum);
}
Sema::DeclTy *Sema::ActOnEnumConstant(Scope *S, DeclTy *theEnumDecl,
DeclTy *lastEnumConst,
SourceLocation IdLoc, IdentifierInfo *Id,
@ -3507,7 +3555,6 @@ void Sema::ActOnEnumBody(SourceLocation EnumLoc, DeclTy *EnumDeclX,
<< Enum->getDeclName();
Diag(Enum->getLocation(), diag::note_previous_definition);
Enum->setInvalidDecl();
PopDeclContext();
return;
}
@ -3675,10 +3722,6 @@ void Sema::ActOnEnumBody(SourceLocation EnumLoc, DeclTy *EnumDeclX,
}
Enum->completeDefinition(Context, BestType);
Consumer.HandleTagDeclDefinition(Enum);
// Leave the context of the enumeration.
PopDeclContext();
}
Sema::DeclTy *Sema::ActOnFileScopeAsmDecl(SourceLocation Loc,

32
clang/lib/Sema/SemaDeclCXX.cpp
View File

@ -414,28 +414,6 @@ void Sema::ActOnBaseSpecifiers(DeclTy *ClassDecl, BaseTy **Bases,
// C++ class member Handling
//===----------------------------------------------------------------------===//
/// ActOnStartCXXClassDef - This is called at the start of a class/struct/union
/// definition, when on C++.
void Sema::ActOnStartCXXClassDef(Scope *S, DeclTy *D, SourceLocation LBrace) {
CXXRecordDecl *Dcl = cast<CXXRecordDecl>(static_cast<Decl *>(D));
PushDeclContext(S, Dcl);
FieldCollector->StartClass();
if (Dcl->getIdentifier()) {
// C++ [class]p2:
// [...] The class-name is also inserted into the scope of the
// class itself; this is known as the injected-class-name. For
// purposes of access checking, the injected-class-name is treated
// as if it were a public member name.
RecordDecl *InjectedClassName
= CXXRecordDecl::Create(Context, Dcl->getTagKind(),
CurContext, Dcl->getLocation(),
Dcl->getIdentifier(), Dcl);
InjectedClassName->setImplicit();
PushOnScopeChains(InjectedClassName, S);
}
}
/// ActOnCXXMemberDeclarator - This is invoked when a C++ class member
/// declarator is parsed. 'AS' is the access specifier, 'BW' specifies the
/// bitfield width if there is one and 'InitExpr' specifies the initializer if
@ -975,16 +953,6 @@ void Sema::AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl) {
}
}
void Sema::ActOnFinishCXXClassDef(DeclTy *D) {
CXXRecordDecl *Rec = cast<CXXRecordDecl>(static_cast<Decl *>(D));
FieldCollector->FinishClass();
PopDeclContext();
// Everything, including inline method definitions, have been parsed.
// Let the consumer know of the new TagDecl definition.
Consumer.HandleTagDeclDefinition(Rec);
}
/// ActOnStartDelayedCXXMethodDeclaration - We have completed
/// parsing a top-level (non-nested) C++ class, and we are now
/// parsing those parts of the given Method declaration that could

11
clang/test/Sema/member-reference.c
View File

@ -7,3 +7,14 @@ void f(void) {
s->i = 1;
}
typedef int x;
struct S {
int x;
x z;
};
void g(void) {
struct S s[1];
s->x = 1;
s->z = 2;
}

22
clang/test/Sema/nested-redef.c Normal file
View File

@ -0,0 +1,22 @@
// RUN: clang -fsyntax-only -verify %s
struct X { // expected-note{{previous definition is here}}
struct X { } x; // expected-error{{nested redefinition of 'X'}}
};
struct Y { };
void f(void) {
struct Y { }; // okay: this is a different Y
}
struct T;
struct Z {
struct T { int x; } t;
struct U { int x; } u;
};
void f2(void) {
struct T t;
// FIXME: this is well-formed, but Clang breaks on it struct U u;
}

2
clang/test/SemaCXX/anonymous-union.cpp
View File

@ -66,7 +66,7 @@ struct Redecl {
union {
int x; // expected-error{{member of anonymous union redeclares 'x'}}
float y;
double z; // expected-note{{previous definition is here}}
double z; // expected-note{{previous declaration is here}}
double zz; // expected-note{{previous definition is here}}
};

7
clang/test/SemaCXX/class.cpp
View File

@ -53,7 +53,7 @@ public:
typedef int A;
virtual int vi; // expected-error {{error: 'virtual' can only appear on non-static member functions}}
virtual int viv; // expected-error {{error: 'virtual' can only appear on non-static member functions}}
virtual static int vsif(); // expected-error {{error: 'virtual' can only appear on non-static member functions}}
virtual int vif();
@ -105,3 +105,8 @@ void ogfn()
struct C4;
C4; // expected-error {{declaration does not declare anything}}
}
struct C4 {
void f(); // expected-note{{previous declaration is here}}
int f; // expected-error{{duplicate member 'f'}}
};

4
clang/test/SemaObjC/duplicate-ivar-check.m
View File

@ -2,13 +2,13 @@
@interface B1 {
@public
double fill_B; // expected-note {{previous definition is here}}
double fill_B; // expected-note {{previous declaration is here}}
}
@end
@interface B : B1 {
@public
int one; // expected-note {{previous definition is here}}
int one; // expected-note {{previous declaration is here}}
int one; // expected-error {{duplicate member 'one'}}
}
@end

12
clang/test/SemaObjC/interface-scope.m Normal file
View File

@ -0,0 +1,12 @@
// RUN: clang -fsyntax-only -verify %s
@interface I1 {
@private
int x;
struct {
unsigned int x : 3;
unsigned int y : 3;
} flags;
int y;
}
@end

2
clang/test/SemaObjC/ivar-sem-check-1.m
View File

@ -12,7 +12,7 @@ typedef int FOO();
struct T {} X; // expected-error {{nested redefinition of 'T'}}
}YYY;
FOO BADFUNC; // expected-error {{field 'BADFUNC' declared as a function}}
int kaka; // expected-note {{previous definition is here}}
int kaka; // expected-note {{previous declaration is here}}
int kaka; // expected-error {{duplicate member 'kaka'}}
char ch[]; // expected-error {{field 'ch' has incomplete type}}
}