diff options
Diffstat (limited to 'test/CXX/drs/dr6xx.cpp')
-rw-r--r-- | test/CXX/drs/dr6xx.cpp | 83 |
1 files changed, 76 insertions, 7 deletions
diff --git a/test/CXX/drs/dr6xx.cpp b/test/CXX/drs/dr6xx.cpp index 1d37a6d3e80c..9dfcc7d6b464 100644 --- a/test/CXX/drs/dr6xx.cpp +++ b/test/CXX/drs/dr6xx.cpp @@ -142,15 +142,21 @@ namespace dr615 { // dr615: yes static int n = f(); } -namespace dr616 { // dr616: no +namespace dr616 { // dr616: 4.0 #if __cplusplus >= 201103L struct S { int n; } s; - // FIXME: These should all be 'int &&' - using T = decltype(S().n); - using T = decltype(static_cast<S&&>(s).n); - using T = decltype(S().*&S::n); // expected-note 2{{previous}} - using T = decltype(static_cast<S&&>(s).*&S::n); // expected-error {{different type}} - using T = int&&; // expected-error {{different type}} + S f(); + using T = decltype((S().n)); + using T = decltype((static_cast<S&&>(s).n)); + using T = decltype((f().n)); + using T = decltype(S().*&S::n); + using T = decltype(static_cast<S&&>(s).*&S::n); + using T = decltype(f().*&S::n); + using T = int&&; + + using U = decltype(S().n); + using U = decltype(static_cast<S&&>(s).n); + using U = int; #endif } @@ -347,3 +353,66 @@ namespace dr639 { // dr639: yes void((i = 0) + (i = 0)); // expected-warning {{unsequenced}} } } + +namespace dr692 { // dr692: no + namespace temp_func_order_example2 { + template <typename T, typename U> struct A {}; + template <typename T, typename U> void f(U, A<U, T> *p = 0); // expected-note {{candidate}} + template <typename U> int &f(U, A<U, U> *p = 0); // expected-note {{candidate}} + template <typename T> void g(T, T = T()); + template <typename T, typename... U> void g(T, U...); // expected-error 0-1{{C++11}} + void h() { + int &r = f<int>(42, (A<int, int> *)0); + f<int>(42); // expected-error {{ambiguous}} + // FIXME: We should reject this due to ambiguity between the pack and the + // default argument. Only parameters with arguments are considered during + // partial ordering of function templates. + g(42); + } + } + + namespace temp_func_order_example3 { + template <typename T, typename... U> void f(T, U...); // expected-error 0-1{{C++11}} + template <typename T> void f(T); + template <typename T, typename... U> int &g(T *, U...); // expected-error 0-1{{C++11}} + template <typename T> void g(T); + void h(int i) { + // This is made ambiguous by dr692, but made valid again by dr1395. + f(&i); + int &r = g(&i); + } + } + + namespace temp_deduct_partial_example { + template <typename... Args> char &f(Args... args); // expected-error 0-1{{C++11}} + template <typename T1, typename... Args> short &f(T1 a1, Args... args); // expected-error 0-1{{C++11}} + template <typename T1, typename T2> int &f(T1 a1, T2 a2); + void g() { + char &a = f(); + short &b = f(1, 2, 3); + int &c = f(1, 2); + } + } + + namespace temp_deduct_type_example1 { + template <class T1, class ...Z> class S; // expected-error 0-1{{C++11}} + template <class T1, class ...Z> class S<T1, const Z&...>; // expected-error 0-1{{C++11}} + template <class T1, class T2> class S<T1, const T2&> {}; + S<int, const int&> s; + + // FIXME: This should select the first partial specialization. Deduction of + // the second from the first should succeed, because we should ignore the + // trailing pack in A with no corresponding P. + template<class T, class... U> struct A; // expected-error 0-1{{C++11}} + template<class T1, class T2, class... U> struct A<T1,T2*,U...>; // expected-note {{matches}} expected-error 0-1{{C++11}} + template<class T1, class T2> struct A<T1,T2> {}; // expected-note {{matches}} + template struct A<int, int*>; // expected-error {{ambiguous}} + } + + namespace temp_deduct_type_example3 { + // FIXME: This should select the first template, as in the case above. + template<class T, class... U> void f(T*, U...){} // expected-note {{candidate}} expected-error 0-1{{C++11}} + template<class T> void f(T){} // expected-note {{candidate}} + template void f(int*); // expected-error {{ambiguous}} + } +} |