// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++98 %s -verify=expected,cxx98,cxx98-14,cxx98-11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 %s -verify=expected,cxx98-14,cxx98-11,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++14 %s -verify=expected,cxx98-14,since-cxx14,since-cxx11,cxx14 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++17 %s -verify=expected,since-cxx14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++2a %s -verify=expected,since-cxx14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
#if __cplusplus == 199711L
#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
// cxx98-error@-1 {{variadic macros are a C99 feature}}
#endif
namespace cwg705 { // cwg705: yes
namespace N {
struct S {};
void f(S); // #cwg705-f
}
void g() {
N::S s;
f(s); // ok
(f)(s);
// expected-error@-1 {{use of undeclared identifier 'f'}}
// expected-note@#cwg705-f {{'N::f' declared here}}
}
}
namespace cwg712 { // cwg712: partial
void use(int);
void f() {
const int a = 0; // #cwg712-f-a
struct X {
void g(bool cond) {
use(a);
use((a));
use(cond ? a : a);
use((cond, a));
// expected-warning@-1 {{left operand of comma operator has no effect}}
(void)a;
// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'cwg712::f'}} FIXME
// expected-note@#cwg712-f-a {{'a' declared here}}
(void)(a);
// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'cwg712::f'}} FIXME
// expected-note@#cwg712-f-a {{'a' declared here}}
(void)(cond ? a : a); // #cwg712-ternary
// expected-error@#cwg712-ternary {{reference to local variable 'a' declared in enclosing function 'cwg712::f'}} FIXME
// expected-note@#cwg712-f-a {{'a' declared here}}
// expected-error@#cwg712-ternary {{reference to local variable 'a' declared in enclosing function 'cwg712::f'}} FIXME
// expected-note@#cwg712-f-a {{'a' declared here}}
(void)(cond, a); // #cwg712-comma
// expected-error@-1 {{reference to local variable 'a' declared in enclosing function 'cwg712::f'}} FIXME
// expected-note@#cwg712-f-a {{'a' declared here}}
// expected-warning@#cwg712-comma {{left operand of comma operator has no effect}}
}
};
}
#if __cplusplus >= 201103L
void g() {
struct A { int n; };
constexpr A a = {0}; // #cwg712-g-a
struct X {
void g(bool cond) {
use(a.n);
use(a.*&A::n);
(void)a.n;
// since-cxx11-error@-1 {{reference to local variable 'a' declared in enclosing function 'cwg712::g'}} FIXME
// since-cxx11-note@#cwg712-g-a {{'a' declared here}}
(void)(a.*&A::n);
// since-cxx11-error@-1 {{reference to local variable 'a' declared in enclosing function 'cwg712::g'}} FIXME
// since-cxx11-note@#cwg712-g-a {{'a' declared here}}
}
};
}
#endif
}
namespace cwg713 { // cwg713: 3.0
template<typename T>
struct is_const {
static const bool value = __is_const(T);
};
template<typename T>
struct is_volatile {
static const bool value = __is_volatile(T);
};
static_assert(!is_const<void()const>::value, "");
static_assert(!is_const<void()const volatile>::value, "");
static_assert(!is_volatile<void()volatile>::value, "");
static_assert(!is_volatile<void()const volatile>::value, "");
#if __cplusplus >= 201103L
static_assert(!is_const<void()const&>::value, "");
static_assert(!is_volatile<void()volatile&>::value, "");
#endif
} // namespace cwg713
// cwg722 is in cwg722.cpp
namespace cwg727 { // cwg727: partial
struct A {
template<typename T> struct C; // #cwg727-C
template<typename T> void f(); // #cwg727-f
template<typename T> static int N; // #cwg727-N
// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
template<> struct C<int>;
template<> void f<int>();
template<> int N<int>;
template<typename T> struct C<T*>;
template<typename T> static int N<T*>;
struct B {
template<> struct C<float>;
// expected-error@-1 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<> void f<float>();
// expected-error@-1 {{no function template matches function template specialization 'f'}}
template<> int N<float>;
// expected-error@-1 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
template<typename T> struct C<T**>;
// expected-error@-1 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<typename T> static int N<T**>;
// expected-error@-1 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
template<> struct A::C<double>;
// expected-error@-1 {{non-friend class member 'C' cannot have a qualified name}}
// expected-error@-2 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<> void A::f<double>();
// expected-error@-1 {{o function template matches function template specialization 'f'}}
// expected-error@-2 {{non-friend class member 'f' cannot have a qualified name}}
template<> int A::N<double>;
// expected-error@-1 {{non-friend class member 'N' cannot have a qualified name}}
// expected-error@-2 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
template<typename T> struct A::C<T***>;
// expected-error@-1 {{non-friend class member 'C' cannot have a qualified name}}
// expected-error@-2 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<typename T> static int A::N<T***>;
// expected-error@-1 {{non-friend class member 'N' cannot have a qualified name}}
// expected-error@-2 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
};
};
template<> struct A::C<char>;
template<> void A::f<char>();
template<> int A::N<char>;
template<typename T> struct A::C<T****>;
template<typename T> int A::N<T****>;
namespace C {
template<> struct A::C<long>;
// expected-error@-1 {{class template specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<> void A::f<long>();
// expected-error@-1 {{function template specialization of 'f' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-f {{explicitly specialized declaration is here}}
template<> int A::N<long>;
// expected-error@-1 {{variable template specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
template<typename T> struct A::C<T*****>;
// expected-error@-1 {{class template partial specialization of 'C' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-C {{explicitly specialized declaration is here}}
template<typename T> int A::N<T*****>;
// expected-error@-1 {{variable template partial specialization of 'N' not in class 'A' or an enclosing namespace}}
// expected-note@#cwg727-N {{explicitly specialized declaration is here}}
}
template<typename>
struct D {
template<typename T> struct C { typename T::error e; };
// expected-error@-1 {{type 'float' cannot be used prior to '::' because it has no members}}
// expected-note@#cwg727-C-float {{in instantiation of template class 'cwg727::D<int>::C<float>' requested here}}
template<typename T> void f() { T::error; }
// expected-error@-1 {{type 'float' cannot be used prior to '::' because it has no members}}
// expected-note@#cwg727-f-float {{in instantiation of function template specialization 'cwg727::D<int>::f<float>' requested here}}
template<typename T> static const int N = T::error;
// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
// expected-error@-2 {{type 'float' cannot be used prior to '::' because it has no members}}
// expected-note@#cwg727-N-float {{in instantiation of static data member 'cwg727::D<int>::N<float>' requested here}}
template<> struct C<int> {};
template<> void f<int>() {}
template<> const int N<int>;
template<typename T> struct C<T*> {};
template<typename T> static const int N<T*>;
template<typename>
struct E {
template<> void f<void>() {}
// expected-error@-1 {{no candidate function template was found for dependent member function template specialization}}
};
};
void d(D<int> di) {
D<int>::C<int>();
di.f<int>();
int a = D<int>::N<int>;
D<int>::C<int*>();
int b = D<int>::N<int*>;
D<int>::C<float>(); // #cwg727-C-float
di.f<float>(); // #cwg727-f-float
int c = D<int>::N<float>; // #cwg727-N-float
}
namespace mixed_inner_outer_specialization {
#if __cplusplus >= 201103L
template<int> struct A {
template<int> constexpr int f() const { return 1; }
template<> constexpr int f<0>() const { return 2; }
};
template<> template<int> constexpr int A<0>::f() const { return 3; }
template<> template<> constexpr int A<0>::f<0>() const { return 4; }
static_assert(A<1>().f<1>() == 1, "");
static_assert(A<1>().f<0>() == 2, "");
static_assert(A<0>().f<1>() == 3, "");
static_assert(A<0>().f<0>() == 4, "");
#endif
#if __cplusplus >= 201402L
template<int> struct B {
template<int> static const int u = 1;
template<> const int u<0> = 2; // #cwg727-u0
// Note that in C++17 onwards, these are implicitly inline, and so the
// initializer of v<0> is not instantiated with the declaration. In
// C++14, v<0> is a non-defining declaration and its initializer is
// instantiated with the class.
template<int> static constexpr int v = 1;
template<> constexpr int v<0> = 2; // #cwg727-v0
template<int> static const inline int w = 1;
// cxx14-error@-1 {{inline variables are a C++17 extension}}
template<> const inline int w<0> = 2;
// cxx14-error@-1 {{inline variables are a C++17 extension}}
};
template<> template<int> constexpr int B<0>::u = 3;
template<> template<> constexpr int B<0>::u<0> = 4;
// since-cxx14-error@-1 {{static data member 'u' already has an initializer}}
// since-cxx14-note@#cwg727-u0 {{previous initialization is here}}
template<> template<int> constexpr int B<0>::v = 3;
template<> template<> constexpr int B<0>::v<0> = 4;
// cxx14-error@-1 {{static data member 'v' already has an initializer}}
// cxx14-note@#cwg727-v0 {{previous initialization is here}}
template<> template<int> constexpr int B<0>::w = 3;
template<> template<> constexpr int B<0>::w<0> = 4;
static_assert(B<1>().u<1> == 1, "");
static_assert(B<1>().u<0> == 2, "");
static_assert(B<0>().u<1> == 3, "");
static_assert(B<1>().v<1> == 1, "");
static_assert(B<1>().v<0> == 2, "");
static_assert(B<0>().v<1> == 3, "");
static_assert(B<0>().v<0> == 4, "");
// cxx14-error@-1 {{static assertion failed due to requirement 'cwg727::mixed_inner_outer_specialization::B<0>().v<0> == 4'}}
// cxx14-note@-2 {{expression evaluates to '2 == 4'}}
static_assert(B<1>().w<1> == 1, "");
static_assert(B<1>().w<0> == 2, "");
static_assert(B<0>().w<1> == 3, "");
static_assert(B<0>().w<0> == 4, "");
#endif
}
template<typename T, typename U> struct Collision {
// FIXME: Missing diagnostic for duplicate function explicit specialization declaration.
template<typename> int f1();
template<> int f1<T>();
template<> int f1<U>();
// FIXME: Missing diagnostic for fucntion redefinition!
template<typename> int f2();
template<> int f2<T>() {}
template<> int f2<U>() {}
template<typename> static int v1;
// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
template<> int v1<T>; // #cwg727-v1-T
template<> int v1<U>;
// expected-error@-1 {{duplicate member 'v1'}}
// expected-note@#cwg727-Collision-int-int {{in instantiation of template class 'cwg727::Collision<int, int>' requested here}}
// expected-note@#cwg727-v1-T {{previous}}
template<typename> static inline int v2;
// cxx98-11-error@-1 {{variable templates are a C++14 extension}}
// cxx98-14-error@-2 {{inline variables are a C++17 extension}}
template<> inline int v2<T>; // #cwg727-v2-T
// cxx98-14-error@-1 {{inline variables are a C++17 extension}}
template<> inline int v2<U>;
// cxx98-14-error@-1 {{inline variables are a C++17 extension}}
// expected-error@-2 {{duplicate member 'v2'}}
// expected-note@#cwg727-v2-T {{previous declaration is here}}
// FIXME: Missing diagnostic for duplicate class explicit specialization.
template<typename> struct S1;
template<> struct S1<T>;
template<> struct S1<U>;
template<typename> struct S2;
template<> struct S2<T> {}; // #cwg727-S2-T
template<> struct S2<U> {};
// expected-error@-1 {{redefinition of 'S2<int>'}}
// expected-note@#cwg727-S2-T {{previous}}
};
Collision<int, int> c; // #cwg727-Collision-int-int
}
namespace cwg777 { // cwg777: 3.7
#if __cplusplus >= 201103L
template <typename... T>
void f(int i = 0, T ...args) {}
void ff() { f(); }
template <typename... T>
void g(int i = 0, T ...args, T ...args2) {}
template <typename... T>
void h(int i = 0, T ...args, int j = 1) {}
#endif
}
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