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// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors
namespace cwg2211 { // cwg2211: 8
#if __cplusplus >= 201103L
void f() {
int a;
auto f = [a](int a) { (void)a; };
// since-cxx11-error@-1 {{a lambda parameter cannot shadow an explicitly captured entity}}
// since-cxx11-note@-2 {{variable 'a' is explicitly captured here}}
auto g = [=](int a) { (void)a; };
}
#endif
} // namespace cwg2211
namespace cwg2213 { // cwg2213: 2.7
template <typename T, typename U>
struct A;
template <typename U>
struct A<int, U>;
} // namespace cwg2213
namespace cwg2229 { // cwg2229: 7
struct AnonBitfieldQualifiers {
const unsigned : 1;
// expected-error@-1 {{anonymous bit-field cannot have qualifiers}}
volatile unsigned : 1;
// expected-error@-1 {{anonymous bit-field cannot have qualifiers}}
const volatile unsigned : 1;
// expected-error@-1 {{anonymous bit-field cannot have qualifiers}}
unsigned : 1;
const unsigned i1 : 1;
volatile unsigned i2 : 1;
const volatile unsigned i3 : 1;
};
} // namespace cwg2229
namespace cwg2233 { // cwg2233: 11
#if __cplusplus >= 201103L
template <typename... T>
void f(int i = 0, T... args) {}
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) {}
template <typename... T, typename... U>
void i(int i = 0, T... args, int j = 1, U... args2) {}
template <class... Ts>
void j(int i = 0, Ts... ts) {}
template <>
void j<int>(int i, int j) {}
template
void j(int, int, int);
extern template
void j(int, int, int, int);
// PR23029
// Ensure instantiating the templates works.
void use() {
f();
f(0, 1);
f<int>(1, 2);
g<int>(1, 2, 3);
h(0, 1);
i();
i(3);
i<int>(3, 2);
i<int>(3, 2, 1);
i<int, int>(1, 2, 3, 4, 5);
j();
j(1);
j(1, 2);
j<int>(1, 2);
}
namespace MultilevelSpecialization {
template<typename ...T> struct A {
template <T... V> void f(int i = 0, int (&... arr)[V]);
};
template<> template<>
void A<int, int>::f<1, 1>(int i, int (&arr1a)[1], int (&arr2a)[1]) {}
// FIXME: I believe this example is valid, at least up to the first explicit
// specialization, but Clang can't cope with explicit specializations that
// expand packs into a sequence of parameters. If we ever start accepting
// that, we'll need to decide whether it's OK for arr1a to be missing its
// default argument -- how far back do we look when determining whether a
// parameter was expanded from a pack?
// -- zygoloid 2020-06-02
template<typename ...T> struct B { // #cwg2233-B
template <T... V> void f(int i = 0, int (&... arr)[V]);
};
template<> template<int a, int b>
void B<int, int>::f(int i, int (&arr1)[a], int (&arr2)[b]) {}
// since-cxx11-error@-1 {{out-of-line definition of 'f' does not match any declaration in 'cwg2233::MultilevelSpecialization::B<int, int>'}}
// since-cxx11-note@#cwg2233-B {{defined here}}
template<> template<>
void B<int, int>::f<1, 1>(int i, int (&arr1a)[1], int (&arr2a)[1]) {}
}
namespace CheckAfterMerging1 {
template <typename... T> void f() {
void g(int, int = 0);
void g(int = 0, T...);
g();
}
void h() { f<int>(); }
}
namespace CheckAfterMerging2 {
template <typename... T> void f() {
void g(int = 0, T...);
void g(int, int = 0);
g();
}
void h() { f<int>(); }
}
#endif
} // namespace cwg2233
namespace cwg2267 { // cwg2267: no
#if __cplusplus >= 201103L
struct A {} a;
struct B { explicit B(const A&); }; // #cwg2267-struct-B
struct D { D(); };
struct C { explicit operator D(); } c;
B b1(a);
const B &b2{a}; // FIXME ill-formed
const B &b3(a);
// since-cxx11-error@-1 {{no viable conversion from 'struct A' to 'const B'}}
// since-cxx11-note@#cwg2267-struct-B {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'struct A' to 'const B &' for 1st argument}}
// since-cxx11-note@#cwg2267-struct-B {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'struct A' to 'B &&' for 1st argument}}
// since-cxx11-note@#cwg2267-struct-B {{explicit constructor is not a candidate}}
D d1(c);
const D &d2{c}; // FIXME ill-formed
const D &d3(c); // FIXME ill-formed
#endif
} // namespace cwg2267
namespace cwg2273 { // cwg2273: 3.3
#if __cplusplus >= 201103L
struct A {
A(int = 0) = delete; // #cwg2273-A
};
struct B : A { // #cwg2273-B
using A::A;
};
B b;
// since-cxx11-error@-1 {{call to implicitly-deleted default constructor of 'B'}}
// since-cxx11-note@#cwg2273-B {{default constructor of 'B' is implicitly deleted because base class 'A' has a deleted default constructor}}
// since-cxx11-note@#cwg2273-A {{'A' has been explicitly marked deleted here}}
#endif
} // namespace cwg2273
namespace cwg2277 { // cwg2277: partial
#if __cplusplus >= 201103L
struct A {
A(int, int = 0);
void f(int, int = 0); // #cwg2277-A-f
};
struct B : A {
B(int);
using A::A;
void f(int); // #cwg2277-B-f
using A::f;
};
void g() {
B b{0};
b.f(0); // FIXME: this is well-formed for the same reason as initialization of 'b' above
// since-cxx11-error@-1 {{call to member function 'f' is ambiguous}}
// since-cxx11-note@#cwg2277-A-f {{candidate function}}
// since-cxx11-note@#cwg2277-B-f {{candidate function}}
}
#endif
} // namespace cwg2277
namespace cwg2285 { // cwg2285: 4
// Note: Clang 4 implements this DR but it set a wrong value of `__cplusplus`
#if __cplusplus >= 201703L
void test() {
using T = int[1];
auto [a] = T{a};
// since-cxx17-error@-1 {{binding 'a' cannot appear in the initializer of its own decomposition declaration}}
}
#endif
} // namespace cwg2285
namespace cwg2292 { // cwg2292: 9
#if __cplusplus >= 201103L
template<typename T> using id = T;
void test(int *p) {
p->template id<int>::~id<int>();
}
#endif
} // namespace cwg2292
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