764d2fe666
Split out a new ExpressionEvaluationContext flag for this case, and don't treat it as unevaluated in C++11. This fixes some crash-on-invalids where we would allow references to class members in potentially-evaluated constant expressions in static member functions, and also fixes half of PR10177. The fix to PR10177 exposed a case where template instantiation failed to provide a source location for a diagnostic, so TreeTransform has been tweaked to supply source locations when transforming a type. The source location is still not very good, but MarkDeclarationsReferencedInType would need to operate on a TypeLoc to improve it further. Also fix MarkDeclarationReferenced in C++98 mode to trigger instantiation for static data members of class templates which are used in constant expressions. This fixes a link-time problem, but we still incorrectly treat the member as non-constant. The rest of the fix for that issue is blocked on PCH support for early-instantiated static data members, which will be added in a subsequent patch. llvm-svn: 146955
41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
|
|
|
|
template<typename T, typename U, U> using alias_ref = T;
|
|
template<typename T, typename U, U> void func_ref() {}
|
|
template<typename T, typename U, U> struct class_ref {};
|
|
|
|
template<int N>
|
|
struct U {
|
|
static int a;
|
|
};
|
|
|
|
template<int N> struct S; // expected-note 2{{here}}
|
|
|
|
template<int N>
|
|
int U<N>::a = S<N>::kError; // expected-error 2{{undefined}}
|
|
|
|
template<typename T>
|
|
void f() {
|
|
// FIXME: The standard suggests that U<0>::a is odr-used by this expression,
|
|
// but it's not entirely clear that's the right behaviour.
|
|
(void)alias_ref<int, int&, U<0>::a>();
|
|
(void)func_ref<int, int&, U<1>::a>(); // expected-note {{here}}
|
|
(void)class_ref<int, int&, U<2>::a>(); // expected-note {{here}}
|
|
};
|
|
|
|
int main() {
|
|
f<int>(); // expected-note 2{{here}}
|
|
}
|
|
|
|
namespace N {
|
|
template<typename T> struct S { static int n; };
|
|
template<typename T> int S<T>::n = 5;
|
|
void g(int*);
|
|
template<typename T> int f() {
|
|
int k[S<T>::n];
|
|
g(k);
|
|
return k[3];
|
|
}
|
|
int j = f<int>();
|
|
}
|