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Split Sema::ActOnFriendTypeDecl into Sema::CheckFriendTypeDecl (for 

semantic analysis) and Sema::ActOnFriendTypeDecl (the action
callback). This is a prerequisite for improving template instantiation
of friend type declarations.

llvm-svn: 100633
This commit is contained in:
Douglas Gregor 2010-04-07 16:53:43 +00:00
parent f2351a7a6e
commit afb9bc10fa
2 changed files with 63 additions and 35 deletions
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2
clang/lib/Sema/Sema.h
View File

@ -2530,6 +2530,8 @@ public:
ExprArg AssertExpr,
ExprArg AssertMessageExpr);
FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc,
TypeSourceInfo *TSInfo);
DeclPtrTy ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
MultiTemplateParamsArg TemplateParams);
DeclPtrTy ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition,

96
clang/lib/Sema/SemaDeclCXX.cpp
View File

@ -5318,6 +5318,53 @@ Sema::DeclPtrTy Sema::ActOnStaticAssertDeclaration(SourceLocation AssertLoc,
return DeclPtrTy::make(Decl);
}
/// \brief Perform semantic analysis of the given friend type declaration.
///
/// \returns A friend declaration that.
FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation FriendLoc,
TypeSourceInfo *TSInfo) {
assert(TSInfo && "NULL TypeSourceInfo for friend type declaration");
QualType T = TSInfo->getType();
SourceRange TypeRange = TSInfo->getTypeLoc().getSourceRange();
// C++03 [class.friend]p2:
// An elaborated-type-specifier shall be used in a friend declaration
// for a class.*
//
// * The class-key of the elaborated-type-specifier is required.
if (!getLangOptions().CPlusPlus0x && !T->isElaboratedTypeSpecifier()) {
// If we evaluated the type to a record type, suggest putting
// a tag in front.
if (const RecordType *RT = T->getAs<RecordType>()) {
RecordDecl *RD = RT->getDecl();
std::string InsertionText = std::string(" ") + RD->getKindName();
Diag(FriendLoc, diag::err_unelaborated_friend_type)
<< (unsigned) RD->getTagKind()
<< T
<< SourceRange(FriendLoc)
<< FixItHint::CreateInsertion(TypeRange.getBegin(),
InsertionText);
return 0;
} else {
Diag(FriendLoc, diag::err_unexpected_friend)
<< SourceRange(FriendLoc, TypeRange.getEnd());
return 0;
}
}
// Enum types cannot be friends.
if (T->getAs<EnumType>()) {
Diag(FriendLoc, diag::err_enum_friend)
<< SourceRange(FriendLoc, TypeRange.getEnd());
return 0;
}
return FriendDecl::Create(Context, CurContext, FriendLoc, TSInfo, FriendLoc);
}
/// Handle a friend type declaration. This works in tandem with
/// ActOnTag.
///
@ -5351,6 +5398,9 @@ Sema::DeclPtrTy Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
if (TheDeclarator.isInvalidType())
return DeclPtrTy();
if (!TSI)
TSI = Context.getTrivialTypeSourceInfo(T, DS.getSourceRange().getBegin());
// This is definitely an error in C++98. It's probably meant to
// be forbidden in C++0x, too, but the specification is just
// poorly written.
@ -5370,38 +5420,11 @@ Sema::DeclPtrTy Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
<< DS.getSourceRange();
return DeclPtrTy();
}
// C++ [class.friend]p2:
// An elaborated-type-specifier shall be used in a friend declaration
// for a class.*
// * The class-key of the elaborated-type-specifier is required.
// This is one of the rare places in Clang where it's legitimate to
// ask about the "spelling" of the type.
if (!getLangOptions().CPlusPlus0x && !T->isElaboratedTypeSpecifier()) {
// If we evaluated the type to a record type, suggest putting
// a tag in front.
if (const RecordType *RT = T->getAs<RecordType>()) {
RecordDecl *RD = RT->getDecl();
std::string InsertionText = std::string(" ") + RD->getKindName();
Diag(DS.getTypeSpecTypeLoc(), diag::err_unelaborated_friend_type)
<< (unsigned) RD->getTagKind()
<< T
<< SourceRange(DS.getFriendSpecLoc())
<< FixItHint::CreateInsertion(DS.getTypeSpecTypeLoc(), InsertionText);
return DeclPtrTy();
}else {
Diag(DS.getFriendSpecLoc(), diag::err_unexpected_friend)
<< DS.getSourceRange();
return DeclPtrTy();
}
}
// Enum types cannot be friends.
if (T->getAs<EnumType>()) {
// Enum templates cannot be friends.
if (TempParams.size() && T->getAs<EnumType>()) {
Diag(DS.getTypeSpecTypeLoc(), diag::err_enum_friend)
<< SourceRange(DS.getFriendSpecLoc());
<< SourceRange(DS.getFriendSpecLoc());
return DeclPtrTy();
}
@ -5417,15 +5440,18 @@ Sema::DeclPtrTy Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
// friend a member of an arbitrary specialization of your template).
Decl *D;
if (TempParams.size())
if (unsigned NumTempParamLists = TempParams.size())
D = FriendTemplateDecl::Create(Context, CurContext, Loc,
TempParams.size(),
NumTempParamLists,
(TemplateParameterList**) TempParams.release(),
TSI,
DS.getFriendSpecLoc());
else
D = FriendDecl::Create(Context, CurContext, Loc, TSI,
DS.getFriendSpecLoc());
D = CheckFriendTypeDecl(DS.getFriendSpecLoc(), TSI);
if (!D)
return DeclPtrTy();
D->setAccess(AS_public);
CurContext->addDecl(D);