137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -ftemplate-depth 16 -fcxx-exceptions -fexceptions %s
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// DR1330: an exception specification for a function template is only
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// instantiated when it is needed.
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template<typename T> void f1(T*) throw(T); // expected-error{{incomplete type 'Incomplete' is not allowed in exception specification}}
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struct Incomplete; // expected-note{{forward}}
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void test_f1(Incomplete *incomplete_p, int *int_p) {
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f1(int_p);
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f1(incomplete_p); // expected-note{{instantiation of exception spec}}
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}
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template<typename T> struct A {
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template<typename U> struct B {
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static void f() noexcept(A<U>().n);
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};
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constexpr A() : n(true) {}
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bool n;
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};
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static_assert(noexcept(A<int>::B<char>::f()), "");
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template<unsigned N> struct S {
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static void recurse() noexcept(noexcept(S<N+1>::recurse())); // \
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// expected-error {{no member named 'recurse'}} \
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// expected-note 9{{instantiation of exception spec}}
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};
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decltype(S<0>::recurse()) *pVoid1 = 0; // ok, exception spec not needed
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decltype(&S<0>::recurse) pFn = 0; // ok, exception spec not needed
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template<> struct S<10> {};
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void (*pFn2)() noexcept = &S<0>::recurse; // expected-note {{instantiation of exception spec}} expected-error {{not superset}}
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namespace dr1330_example {
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template <class T> struct A {
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void f(...) throw (typename T::X); // expected-error {{'int'}}
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void f(int);
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};
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int main() {
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A<int>().f(42);
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}
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struct S {
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template<typename T>
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static int f() noexcept(noexcept(A<T>().f("boo!"))) { return 0; } // \
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// expected-note {{instantiation of exception spec}}
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typedef decltype(f<S>()) X;
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};
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int test2() {
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S().f<S>(); // ok
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S().f<int>(); // expected-note {{instantiation of exception spec}}
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}
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}
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namespace core_19754_example {
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template<typename T> T declval() noexcept;
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template<typename T, typename = decltype(T(declval<T&&>()))>
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struct is_movable { static const bool value = true; };
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template<typename T>
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struct wrap {
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T val;
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void irrelevant(wrap &p) noexcept(is_movable<T>::value);
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};
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template<typename T>
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struct base {
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base() {}
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base(const typename T::type1 &);
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base(const typename T::type2 &);
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};
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template<typename T>
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struct type1 {
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wrap<typename T::base> base;
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};
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template<typename T>
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struct type2 {
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wrap<typename T::base> base;
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};
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struct types {
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typedef base<types> base;
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typedef type1<types> type1;
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typedef type2<types> type2;
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};
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base<types> val = base<types>();
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}
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namespace pr9485 {
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template <typename T> void f1(T) throw(typename T::exception); // expected-note {{candidate}}
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template <typename T> void f1(T, int = 0) throw(typename T::noitpecxe); // expected-note {{candidate}}
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template <typename T> void f2(T) noexcept(T::throws); // expected-note {{candidate}}
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template <typename T> void f2(T, int = 0) noexcept(T::sworht); // expected-note {{candidate}}
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void test() {
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f1(0); // expected-error {{ambiguous}}
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f2(0); // expected-error {{ambiguous}}
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}
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}
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struct Exc1 { char c[4]; };
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struct Exc2 { double x, y, z; };
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struct Base {
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virtual void f() noexcept; // expected-note {{overridden}}
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};
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template<typename T> struct Derived : Base {
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void f() noexcept (sizeof(T) == 4); // expected-error {{is more lax}}
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void g() noexcept (T::error);
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};
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Derived<Exc1> d1; // ok
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Derived<Exc2> d2; // expected-note {{in instantiation of}}
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// If the vtable for a derived class is used, the exception specification of
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// any member function which ends up in that vtable is needed, even if it was
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// declared in a base class.
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namespace PR12763 {
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template<bool *B> struct T {
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virtual void f() noexcept (*B); // expected-error {{constant expression}} expected-note {{read of non-const}}
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};
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bool b; // expected-note {{here}}
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struct X : public T<&b> {
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virtual void g();
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};
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void X::g() {} // expected-note {{in instantiation of}}
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}
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