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Make sure that we're diagnosing duplicate explicit instantiation definitions. 

llvm-svn: 84189
This commit is contained in:
Douglas Gregor 2009-10-15 18:07:02 +00:00
parent 3d7e69f2c9
commit 8f003d0fa3
3 changed files with 41 additions and 3 deletions
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10
clang/lib/Sema/SemaTemplate.cpp
View File

@ -3818,8 +3818,11 @@ Sema::ActOnExplicitInstantiation(Scope *S,
CheckExplicitInstantiationScope(*this, Record, NameLoc, true);
// Verify that it is okay to explicitly instantiate here.
if (CXXRecordDecl *PrevDecl
= cast_or_null<CXXRecordDecl>(Record->getPreviousDeclaration())) {
CXXRecordDecl *PrevDecl
= cast_or_null<CXXRecordDecl>(Record->getPreviousDeclaration());
if (!PrevDecl && Record->getDefinition(Context))
PrevDecl = Record;
if (PrevDecl) {
MemberSpecializationInfo *MSInfo = PrevDecl->getMemberSpecializationInfo();
bool SuppressNew = false;
assert(MSInfo && "No member specialization information?");
@ -4065,6 +4068,9 @@ Sema::DeclResult Sema::ActOnExplicitInstantiation(Scope *S,
}
FunctionDecl *PrevDecl = Specialization->getPreviousDeclaration();
if (!PrevDecl && Specialization->isThisDeclarationADefinition())
PrevDecl = Specialization;
if (PrevDecl) {
bool SuppressNew = false;
if (CheckSpecializationInstantiationRedecl(*this, D.getIdentifierLoc(), TSK,

5
clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
View File

@ -1258,7 +1258,10 @@ void Sema::InstantiateStaticDataMemberDefinition(
if (Var) {
Var->setPreviousDeclaration(OldVar);
Var->setTemplateSpecializationKind(OldVar->getTemplateSpecializationKind());
MemberSpecializationInfo *MSInfo = OldVar->getMemberSpecializationInfo();
assert(MSInfo && "Missing member specialization information?");
Var->setTemplateSpecializationKind(MSInfo->getTemplateSpecializationKind(),
MSInfo->getPointOfInstantiation());
DeclGroupRef DG(Var);
Consumer.HandleTopLevelDecl(DG);
}

29
clang/test/CXX/temp/temp.spec/p5.cpp Normal file
View File

@ -0,0 +1,29 @@
// RUN: clang-cc -fsyntax-only -verify %s
template<typename T> inline void f(T) { }
template void f(int); // expected-note{{previous explicit instantiation}}
template void f(int); // expected-error{{duplicate explicit instantiation}}
template<typename T>
struct X0 {
union Inner { };
void f(T) { }
static T value;
};
template<typename T>
T X0<T>::value = 3.14;
template struct X0<int>; // expected-note{{previous explicit instantiation}}
template struct X0<int>; // expected-error{{duplicate explicit instantiation}}
template void X0<float>::f(float); // expected-note{{previous explicit instantiation}}
template void X0<float>::f(float); // expected-error{{duplicate explicit instantiation}}
template union X0<float>::Inner; // expected-note{{previous explicit instantiation}}
template union X0<float>::Inner; // expected-error{{duplicate explicit instantiation}}
template float X0<float>::value; // expected-note{{previous explicit instantiation}}
template float X0<float>::value; // expected-error{{duplicate explicit instantiation}}