r186185 - Revert r186040 to fix PR16597 while Richard investigates what the best
Chandler Carruth
chandlerc at gmail.com
Fri Jul 12 11:54:40 PDT 2013
Author: chandlerc
Date: Fri Jul 12 13:54:40 2013
New Revision: 186185
URL: http://llvm.org/viewvc/llvm-project?rev=186185&view=rev
Log:
Revert r186040 to fix PR16597 while Richard investigates what the best
fix is.
Original commit log:
If we friend a declaration twice, that should not make it visible to
name lookup in the surrounding context. Slightly rework how we handle
friend declarations to inherit the visibility of the prior
declaration, rather than setting a friend declaration to be visible
whenever there was a prior declaration.
Modified:
cfe/trunk/include/clang/AST/Decl.h
cfe/trunk/include/clang/AST/DeclBase.h
cfe/trunk/lib/Sema/SemaDecl.cpp
cfe/trunk/lib/Sema/SemaLookup.cpp
cfe/trunk/lib/Sema/SemaTemplate.cpp
cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp
cfe/trunk/test/CXX/temp/temp.decls/temp.friend/p4.cpp
cfe/trunk/test/SemaCXX/friend.cpp
Modified: cfe/trunk/include/clang/AST/Decl.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Decl.h?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/include/clang/AST/Decl.h (original)
+++ cfe/trunk/include/clang/AST/Decl.h Fri Jul 12 13:54:40 2013
@@ -3402,12 +3402,6 @@ void Redeclarable<decl_type>::setPreviou
First->RedeclLink = LatestDeclLink(static_cast<decl_type*>(this));
assert(!isa<NamedDecl>(static_cast<decl_type*>(this)) ||
cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid());
-
- // If the declaration was previously visible, a redeclaration of it remains
- // visible even if it wouldn't be visible by itself.
- static_cast<decl_type*>(this)->IdentifierNamespace |=
- First->getIdentifierNamespace() &
- (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type);
}
// Inline function definitions.
Modified: cfe/trunk/include/clang/AST/DeclBase.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/DeclBase.h?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/include/clang/AST/DeclBase.h (original)
+++ cfe/trunk/include/clang/AST/DeclBase.h Fri Jul 12 13:54:40 2013
@@ -295,8 +295,6 @@ protected:
friend class ASTReader;
friend class LinkageComputer;
- template<typename decl_type> friend class Redeclarable;
-
private:
void CheckAccessDeclContext() const;
@@ -826,7 +824,7 @@ public:
/// class, but in the semantic context of the actual entity. This property
/// applies only to a specific decl object; other redeclarations of the
/// same entity may not (and probably don't) share this property.
- void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
+ void setObjectOfFriendDecl(bool PreviouslyDeclared) {
unsigned OldNS = IdentifierNamespace;
assert((OldNS & (IDNS_Tag | IDNS_Ordinary |
IDNS_TagFriend | IDNS_OrdinaryFriend)) &&
@@ -835,20 +833,15 @@ public:
IDNS_TagFriend | IDNS_OrdinaryFriend)) &&
"namespace includes other than ordinary or tag");
- Decl *Prev = getPreviousDecl();
IdentifierNamespace = 0;
if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
IdentifierNamespace |= IDNS_TagFriend;
- if (PerformFriendInjection ||
- (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
- IdentifierNamespace |= IDNS_Tag | IDNS_Type;
+ if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Tag | IDNS_Type;
}
if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend)) {
IdentifierNamespace |= IDNS_OrdinaryFriend;
- if (PerformFriendInjection ||
- (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
- IdentifierNamespace |= IDNS_Ordinary;
+ if (PreviouslyDeclared) IdentifierNamespace |= IDNS_Ordinary;
}
}
Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Fri Jul 12 13:54:40 2013
@@ -6328,11 +6328,12 @@ Sema::ActOnFunctionDeclarator(Scope *S,
}
if (isFriend) {
+ // For now, claim that the objects have no previous declaration.
if (FunctionTemplate) {
- FunctionTemplate->setObjectOfFriendDecl();
+ FunctionTemplate->setObjectOfFriendDecl(false);
FunctionTemplate->setAccess(AS_public);
}
- NewFD->setObjectOfFriendDecl();
+ NewFD->setObjectOfFriendDecl(false);
NewFD->setAccess(AS_public);
}
@@ -6651,6 +6652,8 @@ Sema::ActOnFunctionDeclarator(Scope *S,
NewFD->setAccess(Access);
if (FunctionTemplate) FunctionTemplate->setAccess(Access);
+
+ PrincipalDecl->setObjectOfFriendDecl(true);
}
if (NewFD->isOverloadedOperator() && !DC->isRecord() &&
@@ -10381,8 +10384,9 @@ CreateNewDecl:
// declaration so we always pass true to setObjectOfFriendDecl to make
// the tag name visible.
if (TUK == TUK_Friend)
- New->setObjectOfFriendDecl(!FriendSawTagOutsideEnclosingNamespace &&
- getLangOpts().MicrosoftExt);
+ New->setObjectOfFriendDecl(/* PreviouslyDeclared = */ !Previous.empty() ||
+ (!FriendSawTagOutsideEnclosingNamespace &&
+ getLangOpts().MicrosoftExt));
// Set the access specifier.
if (!Invalid && SearchDC->isRecord())
Modified: cfe/trunk/lib/Sema/SemaLookup.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaLookup.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaLookup.cpp (original)
+++ cfe/trunk/lib/Sema/SemaLookup.cpp Fri Jul 12 13:54:40 2013
@@ -2757,15 +2757,8 @@ void Sema::ArgumentDependentLookup(Decla
// If the only declaration here is an ordinary friend, consider
// it only if it was declared in an associated classes.
if (D->getIdentifierNamespace() == Decl::IDNS_OrdinaryFriend) {
- bool DeclaredInAssociatedClass = false;
- for (Decl *DI = D; DI; DI = D->getPreviousDecl()) {
- DeclContext *LexDC = DI->getLexicalDeclContext();
- if (AssociatedClasses.count(cast<CXXRecordDecl>(LexDC))) {
- DeclaredInAssociatedClass = true;
- break;
- }
- }
- if (!DeclaredInAssociatedClass)
+ DeclContext *LexDC = D->getLexicalDeclContext();
+ if (!AssociatedClasses.count(cast<CXXRecordDecl>(LexDC)))
continue;
}
Modified: cfe/trunk/lib/Sema/SemaTemplate.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplate.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaTemplate.cpp (original)
+++ cfe/trunk/lib/Sema/SemaTemplate.cpp Fri Jul 12 13:54:40 2013
@@ -1120,7 +1120,8 @@ Sema::CheckClassTemplate(Scope *S, unsig
NewClass->setAccess(PrevClassTemplate->getAccess());
}
- NewTemplate->setObjectOfFriendDecl();
+ NewTemplate->setObjectOfFriendDecl(/* PreviouslyDeclared = */
+ PrevClassTemplate != NULL);
// Friend templates are visible in fairly strange ways.
if (!CurContext->isDependentContext()) {
Modified: cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp Fri Jul 12 13:54:40 2013
@@ -960,7 +960,7 @@ Decl *TemplateDeclInstantiator::VisitCla
else
Inst->setAccess(D->getAccess());
- Inst->setObjectOfFriendDecl();
+ Inst->setObjectOfFriendDecl(PrevClassTemplate != 0);
// TODO: do we want to track the instantiation progeny of this
// friend target decl?
} else {
@@ -1110,8 +1110,8 @@ Decl *TemplateDeclInstantiator::VisitCXX
// If the original function was part of a friend declaration,
// inherit its namespace state.
- if (D->getFriendObjectKind())
- Record->setObjectOfFriendDecl();
+ if (Decl::FriendObjectKind FOK = D->getFriendObjectKind())
+ Record->setObjectOfFriendDecl(FOK == Decl::FOK_Declared);
// Make sure that anonymous structs and unions are recorded.
if (D->isAnonymousStructOrUnion()) {
@@ -1315,7 +1315,7 @@ Decl *TemplateDeclInstantiator::VisitFun
assert(isFriend && "non-friend has dependent specialization info?");
// This needs to be set now for future sanity.
- Function->setObjectOfFriendDecl();
+ Function->setObjectOfFriendDecl(/*HasPrevious*/ true);
// Instantiate the explicit template arguments.
TemplateArgumentListInfo ExplicitArgs(Info->getLAngleLoc(),
@@ -1365,7 +1365,13 @@ Decl *TemplateDeclInstantiator::VisitFun
// If the original function was part of a friend declaration,
// inherit its namespace state and add it to the owner.
if (isFriend) {
- PrincipalDecl->setObjectOfFriendDecl();
+ NamedDecl *PrevDecl;
+ if (TemplateParams)
+ PrevDecl = FunctionTemplate->getPreviousDecl();
+ else
+ PrevDecl = Function->getPreviousDecl();
+
+ PrincipalDecl->setObjectOfFriendDecl(PrevDecl != 0);
DC->makeDeclVisibleInContext(PrincipalDecl);
bool queuedInstantiation = false;
@@ -1633,7 +1639,7 @@ TemplateDeclInstantiator::VisitCXXMethod
TemplateParams, Method);
if (isFriend) {
FunctionTemplate->setLexicalDeclContext(Owner);
- FunctionTemplate->setObjectOfFriendDecl();
+ FunctionTemplate->setObjectOfFriendDecl(true);
} else if (D->isOutOfLine())
FunctionTemplate->setLexicalDeclContext(D->getLexicalDeclContext());
Method->setDescribedFunctionTemplate(FunctionTemplate);
@@ -1660,7 +1666,7 @@ TemplateDeclInstantiator::VisitCXXMethod
TempParamLists.data());
Method->setLexicalDeclContext(Owner);
- Method->setObjectOfFriendDecl();
+ Method->setObjectOfFriendDecl(true);
} else if (D->isOutOfLine())
Method->setLexicalDeclContext(D->getLexicalDeclContext());
Modified: cfe/trunk/test/CXX/temp/temp.decls/temp.friend/p4.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/temp/temp.decls/temp.friend/p4.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/test/CXX/temp/temp.decls/temp.friend/p4.cpp (original)
+++ cfe/trunk/test/CXX/temp/temp.decls/temp.friend/p4.cpp Fri Jul 12 13:54:40 2013
@@ -26,20 +26,3 @@ void g() {
X2<float> xf;
f(xf);
}
-
-template<typename T>
-struct X3 {
- operator int();
-
- friend void h(int x);
-};
-
-int array2[sizeof(X3<int>)];
-int array3[sizeof(X3<float>)];
-
-void i() {
- X3<int> xi;
- h(xi);
- X3<float> xf;
- h(xf);
-}
Modified: cfe/trunk/test/SemaCXX/friend.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/friend.cpp?rev=186185&r1=186184&r2=186185&view=diff
==============================================================================
--- cfe/trunk/test/SemaCXX/friend.cpp (original)
+++ cfe/trunk/test/SemaCXX/friend.cpp Fri Jul 12 13:54:40 2013
@@ -163,15 +163,3 @@ namespace test9 {
friend void C::f(int, int, int) {} // expected-error {{no function named 'f' with type 'void (int, int, int)' was found in the specified scope}}
};
}
-
-namespace test10 {
- struct A {
- friend void f10();
- };
- struct B {
- friend void f10();
- };
- void g() {
- f10(); // expected-error {{undeclared identifier}}
- }
-}
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