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// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -triple %itanium_abi_triple -std=c++2a %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
namespace dr705 { // dr705: yes
namespace N {
struct S {};
void f(S); // expected-note {{declared here}}
}
void g() {
N::S s;
f(s); // ok
(f)(s); // expected-error {{use of undeclared}}
}
}
namespace dr712 { // dr712: partial
void use(int);
void f() {
const int a = 0; // expected-note 5{{here}}
struct X {
void g(bool cond) {
use(a);
use((a));
use(cond ? a : a);
use((cond, a)); // expected-warning 2{{unused}} FIXME: should only warn once
(void)a; // FIXME: expected-error {{declared in enclosing}}
(void)(a); // FIXME: expected-error {{declared in enclosing}}
(void)(cond ? a : a); // FIXME: expected-error 2{{declared in enclosing}}
(void)(cond, a); // FIXME: expected-error {{declared in enclosing}} expected-warning {{unused}}
}
};
}
#if __cplusplus >= 201103L
void g() {
struct A { int n; };
constexpr A a = {0}; // expected-note 2{{here}}
struct X {
void g(bool cond) {
use(a.n);
use(a.*&A::n);
(void)a.n; // FIXME: expected-error {{declared in enclosing}}
(void)(a.*&A::n); // FIXME: expected-error {{declared in enclosing}}
}
};
}
#endif
}
namespace dr727 { // dr727: partial
struct A {
template<typename T> struct C; // expected-note 6{{here}}
template<typename T> void f(); // expected-note {{here}}
template<typename T> static int N; // expected-error 0-1{{C++14}} expected-note 6{{here}}
template<> struct C<int>;
template<> void f<int>();
template<> static int N<int>;
template<typename T> struct C<T*>;
template<typename T> static int N<T*>;
struct B {
template<> struct C<float>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<> void f<float>(); // expected-error {{no function template matches}}
template<> static int N<float>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<typename T> struct C<T**>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<typename T> static int N<T**>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<> struct A::C<double>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<> void A::f<double>(); // expected-error {{no function template matches}} expected-error {{cannot have a qualified name}}
template<> static int A::N<double>; // expected-error {{not in class 'A' or an enclosing namespace}} expected-error {{cannot have a qualified name}}
template<typename T> struct A::C<T***>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<typename T> static int A::N<T***>; // expected-error {{not in class 'A' or an enclosing namespace}} expected-error {{cannot have a qualified name}}
};
};
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 {{not in class 'A' or an enclosing namespace}}
template<> void A::f<long>(); // expected-error {{not in class 'A' or an enclosing namespace}}
template<> int A::N<long>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<typename T> struct A::C<T*****>; // expected-error {{not in class 'A' or an enclosing namespace}}
template<typename T> int A::N<T*****>; // expected-error {{not in class 'A' or an enclosing namespace}}
}
template<typename>
struct D {
template<typename T> struct C { typename T::error e; }; // expected-error {{no members}}
template<typename T> void f() { T::error; } // expected-error {{no members}}
template<typename T> static const int N = T::error; // expected-error {{no members}} expected-error 0-1{{C++14}}
template<> struct C<int> {};
template<> void f<int>() {}
template<> static const int N<int>;
template<typename T> struct C<T*> {};
template<typename T> static const int N<T*>;
};
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>(); // expected-note {{instantiation of}}
di.f<float>(); // expected-note {{instantiation of}}
int c = D<int>::N<float>; // expected-note {{instantiation of}}
}
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<> static const int u<0> = 2; // expected-note {{here}}
// 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<> static constexpr int v<0> = 2; // #v0
template<int> static const inline int w = 1; // expected-error 0-1{{C++17 extension}}
template<> static const inline int w<0> = 2; // expected-error 0-1{{C++17 extension}}
};
template<> template<int> constexpr int B<0>::u = 3;
template<> template<> constexpr int B<0>::u<0> = 4; // expected-error {{already has an initializer}}
template<> template<int> constexpr int B<0>::v = 3;
template<> template<> constexpr int B<0>::v<0> = 4;
#if __cplusplus < 201702L
// expected-error@-2 {{already has an initializer}}
// expected-note@#v0 {{here}}
#endif
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, "");
#if __cplusplus < 201702L
// expected-error@-2 {{failed}}
#endif
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; // expected-error 0-1{{C++14 extension}}
template<> static int v1<T>; // expected-note {{previous}}
template<> static int v1<U>; // expected-error {{duplicate member}}
template<typename> static inline int v2; // expected-error 0-1{{C++17 extension}} expected-error 0-1{{C++14 extension}}
template<> static inline int v2<T>; // expected-error 0-1{{C++17 extension}} expected-note {{previous}}
template<> static inline int v2<U>; // expected-error 0-1{{C++17 extension}} expected-error {{duplicate member}}
// 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> {}; // expected-note {{previous}}
template<> struct S2<U> {}; // expected-error {{redefinition}}
};
Collision<int, int> c; // expected-note {{in instantiation of}}
}
namespace dr777 { // dr777: 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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