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// 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}}
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}}
// If the vtable for a derived class is used, the exception specification of
// any member function which ends up in that vtable is needed, even if it was
// declared in a base class.
namespace PR12763 {
template<bool *B> struct T {
virtual void f() noexcept (*B); // expected-error {{constant expression}} expected-note {{read of non-const}}
};
bool b; // expected-note {{here}}
struct X : public T<&b> {
virtual void g();
};
void X::g() {} // expected-note {{in instantiation of}}
}
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