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Diffstat (limited to 'test/SemaTemplate/instantiate-exception-spec-cxx11.cpp')
-rw-r--r-- | test/SemaTemplate/instantiate-exception-spec-cxx11.cpp | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/test/SemaTemplate/instantiate-exception-spec-cxx11.cpp b/test/SemaTemplate/instantiate-exception-spec-cxx11.cpp new file mode 100644 index 0000000..8a6f9ef --- /dev/null +++ b/test/SemaTemplate/instantiate-exception-spec-cxx11.cpp @@ -0,0 +1,133 @@ +// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -ftemplate-depth 16 -fcxx-exceptions -fexceptions %s + +// DR1330: an exception specification for a function template is only +// instantiated when it is needed. + +template<typename T> void f1(T*) throw(T); // expected-error{{incomplete type 'Incomplete' is not allowed in exception specification}} +struct Incomplete; // expected-note{{forward}} + +void test_f1(Incomplete *incomplete_p, int *int_p) { + f1(int_p); + f1(incomplete_p); // expected-note{{instantiation of exception spec}} +} + +template<typename T> struct A { + template<typename U> struct B { + static void f() noexcept(A<U>().n); + }; + + constexpr A() : n(true) {} + bool n; +}; + +static_assert(noexcept(A<int>::B<char>::f()), ""); + +template<unsigned N> struct S { + static void recurse() noexcept(noexcept(S<N+1>::recurse())); // \ + // expected-error {{no member named 'recurse'}} \ + // expected-note 9{{instantiation of exception spec}} +}; +decltype(S<0>::recurse()) *pVoid1 = 0; // ok, exception spec not needed +decltype(&S<0>::recurse) pFn = 0; // ok, exception spec not needed + +template<> struct S<10> {}; +void (*pFn2)() noexcept = &S<0>::recurse; // expected-note {{instantiation of exception spec}} expected-error {{not superset}} + + +template<typename T> T go(T a) noexcept(noexcept(go(a))); // \ +// expected-error 16{{call to function 'go' that is neither visible}} \ +// expected-note 16{{'go' should be declared prior to the call site}} \ +// expected-error {{recursive template instantiation exceeded maximum depth of 16}} \ +// expected-error {{use of undeclared identifier 'go'}} \ + +void f() { + int k = go(0); // \ + // expected-note {{in instantiation of exception specification for 'go<int>' requested here}} +} + + +namespace dr1330_example { + template <class T> struct A { + void f(...) throw (typename T::X); // expected-error {{'int'}} + void f(int); + }; + + int main() { + A<int>().f(42); + } + + int test2() { + struct S { + template<typename T> + static int f() noexcept(noexcept(A<T>().f("boo!"))) { return 0; } // \ + // expected-note {{instantiation of exception spec}} + typedef decltype(f<S>()) X; + }; + S().f<S>(); // ok + S().f<int>(); // expected-note {{instantiation of exception spec}} + } +} + +namespace core_19754_example { + template<typename T> T declval() noexcept; + + template<typename T, typename = decltype(T(declval<T&&>()))> + struct is_movable { static const bool value = true; }; + + template<typename T> + struct wrap { + T val; + void irrelevant(wrap &p) noexcept(is_movable<T>::value); + }; + + template<typename T> + struct base { + base() {} + base(const typename T::type1 &); + base(const typename T::type2 &); + }; + + template<typename T> + struct type1 { + wrap<typename T::base> base; + }; + + template<typename T> + struct type2 { + wrap<typename T::base> base; + }; + + struct types { + typedef base<types> base; + typedef type1<types> type1; + typedef type2<types> type2; + }; + + base<types> val = base<types>(); +} + +namespace pr9485 { + template <typename T> void f1(T) throw(typename T::exception); // expected-note {{candidate}} + template <typename T> void f1(T, int = 0) throw(typename T::noitpecxe); // expected-note {{candidate}} + + template <typename T> void f2(T) noexcept(T::throws); // expected-note {{candidate}} + template <typename T> void f2(T, int = 0) noexcept(T::sworht); // expected-note {{candidate}} + + void test() { + f1(0); // expected-error {{ambiguous}} + f2(0); // expected-error {{ambiguous}} + } +} + +struct Exc1 { char c[4]; }; +struct Exc2 { double x, y, z; }; +struct Base { + virtual void f() noexcept; // expected-note {{overridden}} +}; +template<typename T> struct Derived : Base { + void f() noexcept (sizeof(T) == 4); // expected-error {{is more lax}} + void g() noexcept (T::error); +}; + +Derived<Exc1> d1; // ok +Derived<Exc2> d2; // expected-note {{in instantiation of}} |