Diagnose explicit instantiations of function templates and member
functions/static data members of class template specializations that
do not have definitions. This is the latter part of [temp.explicit]p4;
the former part still needs more testing.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84182 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Basic/DiagnosticSemaKinds.td b/include/clang/Basic/DiagnosticSemaKinds.td
index c9803da..5ea8a6a 100644
--- a/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/include/clang/Basic/DiagnosticSemaKinds.td
@@ -1112,9 +1112,12 @@
"qualifier in explicit instantiation of '%0%1' requires a template-id">;
def err_explicit_instantiation_unqualified_wrong_namespace : Error<
"explicit instantiation of %q0 must occur in %1">;
-def err_explicit_instantiation_undefined_member_class : Error<
- "explicit instantiation of undefined member class %0 of class template %1">;
-
+def err_explicit_instantiation_undefined_member : Error<
+ "explicit instantiation of undefined %select{member class|member function|"
+ "static data member}0 %1 of class template %2">;
+def err_explicit_instantiation_undefined_func_template : Error<
+ "explicit instantiation of undefined function template %0">;
+
// C++ typename-specifiers
def err_typename_nested_not_found : Error<"no type named %0 in %1">;
def err_typename_nested_not_type : Error<
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 80f3663..9b46f77 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -3197,11 +3197,13 @@
void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
FunctionDecl *Function,
- bool Recursive = false);
+ bool Recursive = false,
+ bool DefinitionRequired = false);
void InstantiateStaticDataMemberDefinition(
SourceLocation PointOfInstantiation,
VarDecl *Var,
- bool Recursive = false);
+ bool Recursive = false,
+ bool DefinitionRequired = false);
void InstantiateMemInitializers(CXXConstructorDecl *New,
const CXXConstructorDecl *Tmpl,
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index 04580b7..aa0c034 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -3657,8 +3657,8 @@
CXXRecordDecl *Def
= cast_or_null<CXXRecordDecl>(Pattern->getDefinition(Context));
if (!Def) {
- Diag(TemplateLoc, diag::err_explicit_instantiation_undefined_member_class)
- << Record->getDeclName() << Record->getDeclContext();
+ Diag(TemplateLoc, diag::err_explicit_instantiation_undefined_member)
+ << 0 << Record->getDeclName() << Record->getDeclContext();
Diag(Pattern->getLocation(), diag::note_forward_declaration)
<< Pattern;
return true;
@@ -3787,7 +3787,8 @@
// FIXME: Check for prior specializations and such.
Prev->setTemplateSpecializationKind(TSK);
if (TSK == TSK_ExplicitInstantiationDefinition)
- InstantiateStaticDataMemberDefinition(D.getIdentifierLoc(), Prev, false);
+ InstantiateStaticDataMemberDefinition(D.getIdentifierLoc(), Prev, false,
+ /*DefinitionRequired=*/true);
// FIXME: Create an ExplicitInstantiation node?
return DeclPtrTy();
@@ -3887,7 +3888,7 @@
// definition.
if (TSK == TSK_ExplicitInstantiationDefinition)
InstantiateFunctionDefinition(D.getIdentifierLoc(), Specialization,
- false);
+ false, /*DefinitionRequired=*/true);
Specialization->setTemplateSpecializationKind(TSK);
break;
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 060cc55..ca05d59 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1044,9 +1044,14 @@
///
/// \param Recursive if true, recursively instantiates any functions that
/// are required by this instantiation.
+///
+/// \param DefinitionRequired if true, then we are performing an explicit
+/// instantiation where the body of the function is required. Complain if
+/// there is no such body.
void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
FunctionDecl *Function,
- bool Recursive) {
+ bool Recursive,
+ bool DefinitionRequired) {
if (Function->isInvalidDecl())
return;
@@ -1075,8 +1080,24 @@
if (PatternDecl)
Pattern = PatternDecl->getBody(PatternDecl);
- if (!Pattern)
+ if (!Pattern) {
+ if (DefinitionRequired) {
+ if (Function->getPrimaryTemplate())
+ Diag(PointOfInstantiation,
+ diag::err_explicit_instantiation_undefined_func_template)
+ << Function->getPrimaryTemplate();
+ else
+ Diag(PointOfInstantiation,
+ diag::err_explicit_instantiation_undefined_member)
+ << 1 << Function->getDeclName() << Function->getDeclContext();
+
+ if (PatternDecl)
+ Diag(PatternDecl->getLocation(),
+ diag::note_explicit_instantiation_here);
+ }
+
return;
+ }
// C++0x [temp.explicit]p9:
// Except for inline functions, other explicit instantiation declarations
@@ -1161,10 +1182,15 @@
///
/// \param Recursive if true, recursively instantiates any functions that
/// are required by this instantiation.
+///
+/// \param DefinitionRequired if true, then we are performing an explicit
+/// instantiation where an out-of-line definition of the member variable
+/// is required. Complain if there is no such definition.
void Sema::InstantiateStaticDataMemberDefinition(
SourceLocation PointOfInstantiation,
VarDecl *Var,
- bool Recursive) {
+ bool Recursive,
+ bool DefinitionRequired) {
if (Var->isInvalidDecl())
return;
@@ -1187,6 +1213,13 @@
// so we won't perform any instantiation. Rather, we rely on the user to
// instantiate this definition (or provide a specialization for it) in
// another translation unit.
+ if (DefinitionRequired) {
+ Diag(PointOfInstantiation,
+ diag::err_explicit_instantiation_undefined_member)
+ << 2 << Var->getDeclName() << Var->getDeclContext();
+ Diag(Def->getLocation(), diag::note_explicit_instantiation_here);
+ }
+
return;
}
diff --git a/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp b/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp
index becdd6b..d7731f1 100644
--- a/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp
+++ b/test/CXX/temp/temp.spec/temp.explicit/p1-0x.cpp
@@ -2,7 +2,7 @@
template<typename T>
struct X {
- void f();
+ void f() {}
};
template inline void X<int>::f(); // expected-error{{'inline'}}
diff --git a/test/CXX/temp/temp.spec/temp.explicit/p2.cpp b/test/CXX/temp/temp.spec/temp.explicit/p2.cpp
index aee0e5d..f3d2c95 100644
--- a/test/CXX/temp/temp.spec/temp.explicit/p2.cpp
+++ b/test/CXX/temp/temp.spec/temp.explicit/p2.cpp
@@ -35,7 +35,7 @@
};
template<typename T>
- void f1(T); // expected-note{{explicit instantiation refers here}}
+ void f1(T) {}; // expected-note{{explicit instantiation refers here}}
}
using namespace N;
diff --git a/test/CXX/temp/temp.spec/temp.explicit/p4.cpp b/test/CXX/temp/temp.spec/temp.explicit/p4.cpp
new file mode 100644
index 0000000..c45df56
--- /dev/null
+++ b/test/CXX/temp/temp.spec/temp.explicit/p4.cpp
@@ -0,0 +1,16 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+template<typename T> void f0(T); // expected-note{{here}}
+template void f0(int); // expected-error{{explicit instantiation of undefined function template}}
+
+template<typename T>
+struct X0 {
+ void f1(); // expected-note{{here}}
+
+ static T value; // expected-note{{here}}
+};
+
+template void X0<int>::f1(); // expected-error{{explicit instantiation of undefined member function}}
+
+template int X0<int>::value; // expected-error{{explicit instantiation of undefined static data member}}
+