// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98,cxx98-14 -fexceptions -fcxx-exceptions -pedantic-errors -Wno-bind-to-temporary-copy
// RUN: %clang_cc1 -std=c++11 %s -verify=expected,since-cxx11,cxx98-14,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors -triple %itanium_abi_triple
// RUN: %clang_cc1 -std=c++14 %s -verify=expected,since-cxx11,cxx98-14,cxx11-14 -fexceptions -fcxx-exceptions -pedantic-errors -triple %itanium_abi_triple
// RUN: %clang_cc1 -std=c++17 %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors -triple %itanium_abi_triple
// RUN: %clang_cc1 -std=c++20 %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors -triple %itanium_abi_triple
// RUN: %clang_cc1 -std=c++23 %s -verify=expected,since-cxx11,since-cxx17 -fexceptions -fcxx-exceptions -pedantic-errors -triple %itanium_abi_triple
#if __cplusplus == 199711L
#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
// cxx98-error@-1 {{variadic macros are a C99 feature}}
#endif
namespace cwg1 { // cwg1: no
namespace X { extern "C" void cwg1_f(int a = 1); }
namespace Y { extern "C" void cwg1_f(int a = 1); }
using X::cwg1_f; using Y::cwg1_f;
void g() {
cwg1_f(0);
// FIXME: This should be rejected, due to the ambiguous default argument.
cwg1_f();
}
namespace X {
using Y::cwg1_f;
void h() {
cwg1_f(0);
// FIXME: This should be rejected, due to the ambiguous default argument.
cwg1_f();
}
}
namespace X {
void z(int);
}
void X::z(int = 1) {} // #cwg1-z
namespace X {
void z(int = 1);
// expected-error@-1 {{redefinition of default argument}}
// expected-note@#cwg1-z {{previous definition is here}}
}
void i(int = 1);
void j() {
void i(int = 1);
using cwg1::i;
i(0);
// FIXME: This should be rejected, due to the ambiguous default argument.
i();
}
void k() {
using cwg1::i;
void i(int = 1);
i(0);
// FIXME: This should be rejected, due to the ambiguous default argument.
i();
}
}
namespace cwg3 { // cwg3: yes
template<typename T> struct A {};
template<typename T> void f(T) { A<T> a; } // #cwg3-f-T
template void f(int);
template<> struct A<int> {};
// expected-error@-1 {{explicit specialization of 'cwg3::A<int>' after instantiation}}
// expected-note@#cwg3-f-T {{implicit instantiation first required here}}
}
namespace cwg4 { // cwg4: 2.8
extern "C" {
static void cwg4_f(int) {}
static void cwg4_f(float) {}
void cwg4_g(int) {} // #cwg4-g-int
void cwg4_g(float) {}
// expected-error@-1 {{conflicting types for 'cwg4_g'}}
// expected-note@#cwg4-g-int {{previous definition is here}}
}
}
namespace cwg5 { // cwg5: 3.1
struct A {} a;
struct B {
B(const A&);
B(const B&);
};
const volatile B b = a;
struct C { C(C&); };
struct D : C {};
struct E { operator D&(); } e;
const C c = e;
}
namespace cwg7 { // cwg7: 3.4
class A { public: ~A(); };
class B : virtual private A {}; // #cwg7-B
class C : public B {} c; // #cwg7-C
// expected-error@#cwg7-C {{inherited virtual base class 'A' has private destructor}}
// expected-note@#cwg7-C {{in implicit default constructor for 'cwg7::C' first required here}}
// expected-note@#cwg7-B {{declared private here}}
// expected-error@#cwg7-C {{inherited virtual base class 'A' has private destructor}}
// expected-note@#cwg7-C {{in implicit destructor for 'cwg7::C' first required here}}
// expected-note@#cwg7-B {{declared private here}}
class VeryDerivedC : public B, virtual public A {} vdc;
class X { ~X(); }; // #cwg7-X
class Y : X { ~Y() {} };
// expected-error@-1 {{base class 'X' has private destructor}}
// expected-note@#cwg7-X {{implicitly declared private here}}
namespace PR16370 { // This regressed the first time CWG7 was fixed.
struct S1 { virtual ~S1(); };
struct S2 : S1 {};
struct S3 : S2 {};
struct S4 : virtual S2 {};
struct S5 : S3, S4 {
S5();
~S5();
};
S5::S5() {}
}
}
namespace cwg8 { // cwg8: dup 45
class A {
struct U;
static const int k = 5;
void f();
template<typename, int, void (A::*)()> struct T;
T<U, k, &A::f> *g();
};
A::T<A::U, A::k, &A::f> *A::g() { return 0; }
}
namespace cwg9 { // cwg9: 2.8
struct B {
protected:
int m; // #cwg9-m
friend int R1();
};
struct N : protected B { // #cwg9-N
friend int R2();
} n;
int R1() { return n.m; }
// expected-error@-1 {{'m' is a protected member of 'cwg9::B'}}
// expected-note@#cwg9-N {{constrained by protected inheritance here}}
// expected-note@#cwg9-m {{member is declared here}}
int R2() { return n.m; }
}
namespace cwg10 { // cwg10: dup 45
class A {
struct B {
A::B *p;
};
};
}
namespace cwg11 { // cwg11: yes
template<typename T> struct A : T {
using typename T::U;
U u;
};
template<typename T> struct B : T {
using T::V;
V v;
// expected-error@-1 {{unknown type name 'V'}}
};
struct X { typedef int U; };
A<X> ax;
}
namespace cwg12 { // cwg12: sup 239
enum E { e };
E &f(E, E = e);
void g() {
int &f(int, E = e);
// Under CWG12, these call two different functions.
// Under CWG239, they call the same function.
int &b = f(e);
int &c = f(1);
}
}
namespace cwg13 { // cwg13: no
extern "C" void f(int);
void g(char);
template<typename T> struct A {
A(void (*fp)(T));
};
template<typename T> int h(void (T));
A<int> a1(f); // FIXME: We should reject this.
A<char> a2(g);
int a3 = h(f); // FIXME: We should reject this.
int a4 = h(g);
}
namespace cwg14 { // cwg14: 3.4
namespace X { extern "C" int cwg14_f(); }
namespace Y { extern "C" int cwg14_f(); }
using namespace X;
using namespace Y;
int k = cwg14_f();
class C {
int k;
friend int Y::cwg14_f();
} c;
namespace Z {
extern "C" int cwg14_f() { return c.k; }
}
namespace X { typedef int T; typedef int U; } // #cwg14-X-U
namespace Y { typedef int T; typedef long U; } // #cwg14-Y-U
T t; // ok, same type both times
U u;
// expected-error@-1 {{reference to 'U' is ambiguous}}
// expected-note@#cwg14-X-U {{candidate found by name lookup is 'cwg14::X::U'}}
// expected-note@#cwg14-Y-U {{candidate found by name lookup is 'cwg14::Y::U'}}
}
namespace cwg15 { // cwg15: yes
template<typename T> void f(int); // #cwg15-f-decl-first
template<typename T> void f(int = 0);
// expected-error@-1 {{default arguments cannot be added to a function template that has already been declared}}
// expected-note@#cwg15-f-decl-first {{previous template declaration is here}}
}
namespace cwg16 { // cwg16: 2.8
class A { // #cwg16-A
void f(); // #cwg16-A-f-decl
friend class C;
};
class B : A {}; // #cwg16-B
class C : B {
void g() {
f();
// expected-error@-1 {{'f' is a private member of 'cwg16::A'}}
// expected-note@#cwg16-B {{constrained by implicitly private inheritance here}}
// expected-note@#cwg16-A-f-decl {{member is declared here}}
A::f(); // #cwg16-A-f-call
// expected-error@#cwg16-A-f-call {{'A' is a private member of 'cwg16::A'}}
// expected-note@#cwg16-B {{constrained by implicitly private inheritance here}}
// expected-note@#cwg16-A {{member is declared here}}
// expected-error@#cwg16-A-f-call {{cannot cast 'cwg16::C' to its private base class 'cwg16::A'}}
// expected-note@#cwg16-B {{implicitly declared private here}}
}
};
}
namespace cwg17 { // cwg17: yes
class A {
int n;
int f();
struct C;
};
struct B : A {} b;
int A::f() { return b.n; }
struct A::C : A {
int g() { return n; }
};
}
// cwg18: sup 577
namespace cwg19 { // cwg19: 3.1
struct A {
int n; // #cwg19-n
};
struct B : protected A { // #cwg19-B
};
struct C : B {} c;
struct D : B {
int get1() { return c.n; }
// expected-error@-1 {{'n' is a protected member of 'cwg19::A'}}
// expected-note@#cwg19-B {{constrained by protected inheritance here}}
// expected-note@#cwg19-n {{member is declared here}}
int get2() { return ((A&)c).n; } // ok, A is an accessible base of B from here
};
}
namespace cwg20 { // cwg20: 2.8
class X {
public:
X();
private:
X(const X&); // #cwg20-X-ctor
};
X &f();
X x = f();
// expected-error@-1 {{calling a private constructor of class 'cwg20::X'}}
// expected-note@#cwg20-X-ctor {{declared private here}}
}
namespace cwg21 { // cwg21: 3.4
template<typename T> struct A;
struct X {
template<typename T = int> friend struct A;
// expected-error@-1 {{default template argument not permitted on a friend template}}
template<typename T = int> friend struct B;
// expected-error@-1 {{default template argument not permitted on a friend template}}
};
}
namespace cwg22 { // cwg22: sup 481
template<typename cwg22_T = cwg22_T> struct X;
// expected-error@-1 {{unknown type name 'cwg22_T'}}
typedef int T;
template<typename T = T> struct Y;
}
namespace cwg23 { // cwg23: yes
template<typename T> void f(T, T); // #cwg23-f-T-T
template<typename T> void f(T, int); // #cwg23-f-T-int
void g() { f(0, 0); }
// expected-error@-1 {{call to 'f' is ambiguous}}
// expected-note@#cwg23-f-T-T {{candidate function [with T = int]}}
// expected-note@#cwg23-f-T-int {{candidate function [with T = int]}}
}
// cwg24: na
namespace cwg25 { // cwg25: yes
struct A {
void f() throw(int);
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
};
void (A::*f)() throw (int);
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
void (A::*g)() throw () = f;
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{different exception specifications}}
void (A::*g2)() throw () = 0;
void (A::*h)() throw (int, char) = f;
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
void (A::*i)() throw () = &A::f;
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{different exception specifications}}
void (A::*i2)() throw () = 0;
void (A::*j)() throw (int, char) = &A::f;
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
void x() {
g2 = f;
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{different exception specifications}}
h = f;
i2 = &A::f;
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{different exception specifications}}
j = &A::f;
}
}
namespace cwg26 { // cwg26: yes
struct A { A(A, const A & = A()); };
// expected-error@-1 {{copy constructor must pass its first argument by reference}}
struct B {
B();
// FIXME: In C++98, we diagnose this twice.
B(const B &, B = B());
// cxx98-14-error@-1 {{recursive evaluation of default argument}}
// cxx98-14-note@-2 {{default argument used here}}
// cxx98-error@-3 {{recursive evaluation of default argument}}
// cxx98-note@-4 {{default argument used here}}
};
struct C {
static C &f();
C(const C &, C = f());
// expected-error@-1 {{recursive evaluation of default argument}}
// expected-note@-2 {{default argument used here}}
};
}
namespace cwg27 { // cwg27: yes
enum E { e } n;
E &m = true ? n : n;
}
// cwg28: na lib
namespace cwg29 { // cwg29: 3.4
void cwg29_f0(); // #cwg29-f0
void g0() { void cwg29_f0(); }
extern "C++" void g0_cxx() { void cwg29_f0(); }
extern "C" void g0_c() { void cwg29_f0(); }
// expected-error@-1 {{declaration of 'cwg29_f0' has a different language linkage}}
// expected-note@#cwg29-f0 {{previous declaration is here}}
extern "C" void cwg29_f1(); // #cwg29-f1
void g1() { void cwg29_f1(); }
extern "C" void g1_c() { void cwg29_f1(); }
extern "C++" void g1_cxx() { void cwg29_f1(); }
// expected-error@-1 {{declaration of 'cwg29_f1' has a different language linkage}}
// expected-note@#cwg29-f1 {{previous declaration is here}}
void g2() { void cwg29_f2(); } // #cwg29-f2
extern "C" void cwg29_f2();
// expected-error@-1 {{declaration of 'cwg29_f2' has a different language linkage}}
// expected-note@#cwg29-f2 {{previous declaration is here}}
extern "C" void g3() { void cwg29_f3(); } // #cwg29-f3
extern "C++" void cwg29_f3();
// expected-error@-1 {{declaration of 'cwg29_f3' has a different language linkage}}
// expected-note@#cwg29-f3 {{previous declaration is here}}
extern "C++" void g4() { void cwg29_f4(); } // #cwg29-f4
extern "C" void cwg29_f4();
// expected-error@-1 {{declaration of 'cwg29_f4' has a different language linkage}}
// expected-note@#cwg29-f4 {{previous declaration is here}}
extern "C" void g5();
extern "C++" void cwg29_f5();
void g5() {
void cwg29_f5(); // ok, g5 is extern "C" but we're not inside the linkage-specification here.
}
extern "C++" void g6();
extern "C" void cwg29_f6();
void g6() {
void cwg29_f6(); // ok, g6 is extern "C" but we're not inside the linkage-specification here.
}
extern "C" void g7();
extern "C++" void cwg29_f7(); // #cwg29-f7
extern "C" void g7() {
void cwg29_f7();
// expected-error@-1 {{declaration of 'cwg29_f7' has a different language linkage}}
// expected-note@#cwg29-f7 {{previous declaration is here}}
}
extern "C++" void g8();
extern "C" void cwg29_f8(); // #cwg29-f8
extern "C++" void g8() {
void cwg29_f8();
// expected-error@-1 {{declaration of 'cwg29_f8' has a different language linkage}}
// expected-note@#cwg29-f8 {{previous declaration is here}}
}
}
namespace cwg30 { // cwg30: sup 468 c++11
struct A {
template<int> static int f();
} a, *p = &a;
// FIXME: It's not clear whether CWG468 applies to C++98 too.
int x = A::template f<0>();
// cxx98-error@-1 {{'template' keyword outside of a template}}
int y = a.template f<0>();
// cxx98-error@-1 {{'template' keyword outside of a template}}
int z = p->template f<0>();
// cxx98-error@-1 {{'template' keyword outside of a template}}
}
namespace cwg31 { // cwg31: 2.8
class X {
private:
void operator delete(void*); // #cwg31-delete
};
// We would call X::operator delete if X() threw (even though it can't,
// and even though we allocated the X using ::operator delete).
X *p = new X;
// expected-error@-1 {{'operator delete' is a private member of 'cwg31::X'}}
// expected-note@#cwg31-delete {{declared private here}}
}
// cwg32: na
namespace cwg33 { // cwg33: 9
namespace X { struct S; void f(void (*)(S)); } // #cwg33-f-S
namespace Y { struct T; void f(void (*)(T)); } // #cwg33-f-T
void g(X::S);
template<typename Z> Z g(Y::T);
void h() { f(&g); }
// expected-error@-1 {{call to 'f' is ambiguous}}
// expected-note@#cwg33-f-S {{candidate function}}
// expected-note@#cwg33-f-T {{candidate function}}
template<typename T> void t(X::S);
template<typename T, typename U = void> void u(X::S);
// expected-error@-1 0-1 {{default template arguments for a function template are a C++11 extension}}
void templ() { f(t<int>); f(u<int>); }
// Even though v<int> cannot select the first overload, ADL considers it
// and adds namespace Z to the set of associated namespaces, and then picks
// Z::f even though that function has nothing to do with any associated type.
namespace Z { struct Q; void f(void(*)()); }
template<int> Z::Q v();
template<typename> void v();
void unrelated_templ() { f(v<int>); }
namespace dependent {
struct X {};
template<class T> struct Y {
friend int operator+(X, void(*)(Y)) {}
};
template<typename T> void f(Y<T>);
int use = X() + f<int>;
// expected-error@-1 {{invalid operands to binary expression ('X' and 'void (Y<int>)')}}
}
namespace member {
struct Q {};
struct Y { friend int operator+(Q, Y (*)()); };
struct X { template<typename> static Y f(); };
int m = Q() + X().f<int>; // ok
int n = Q() + (&(X().f<int>)); // ok
}
}
// cwg34: na
// cwg35: dup 178
namespace cwg36 { // cwg36: 2.8
namespace example1 {
namespace A {
int i;
}
namespace A1 {
using A::i;
using A::i;
}
void f()
{
using A::i;
using A::i;
}
}
namespace example2 {
struct A
{
int i;
static int j;
};
struct B : A { };
struct C : A { };
struct D : virtual B, virtual C
{
using B::i; // #cwg36-ex2-B-i-first
using B::i;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex2-B-i-first {{previous using declaration}}
using C::i; // #cwg36-ex2-C-i-first
using C::i;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex2-C-i-first {{previous using declaration}}
using B::j; // #cwg36-ex2-B-j-first
using B::j;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex2-B-j-first {{previous using declaration}}
using C::j; // #cwg36-ex2-C-j-first
using C::j;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex2-C-j-first {{previous using declaration}}
};
}
namespace example3 {
template<typename T>
struct A
{
T i;
static T j;
};
template<typename T>
struct B : A<T> { };
template<typename T>
struct C : A<T> { };
template<typename T>
struct D : virtual B<T>, virtual C<T>
{
using B<T>::i; // #cwg36-ex3-B-i-first
using B<T>::i;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex3-B-i-first {{previous using declaration}}
using C<T>::i; // #cwg36-ex3-C-i-first
using C<T>::i;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex3-C-i-first {{previous using declaration}}
using B<T>::j; // #cwg36-ex3-B-j-first
using B<T>::j;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex3-B-j-first {{previous using declaration}}
using C<T>::j; // #cwg36-ex3-C-j-first
using C<T>::j;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-ex3-C-j-first {{previous using declaration}}
};
}
namespace example4 {
template<typename T>
struct E {
T k;
};
template<typename T>
struct G : E<T> {
using E<T>::k; // #cwg36-E-k-first
using E<T>::k;
// expected-error@-1 {{redeclaration of using declaration}}
// expected-note@#cwg36-E-k-first {{previous using declaration}}
};
}
}
// cwg37: sup 475
namespace cwg38 { // cwg38: yes
template<typename T> struct X {};
template<typename T> X<T> operator+(X<T> a, X<T> b) { return a; }
template X<int> operator+<int>(X<int>, X<int>);
}
namespace cwg39 { // cwg39: no
namespace example1 {
struct A { int &f(int); };
struct B : A {
using A::f;
float &f(float);
} b;
int &r = b.f(0);
}
namespace example2 {
struct A {
int &x(int); // #cwg39-A-x-decl
static int &y(int); // #cwg39-A-y-decl
};
struct V {
int &z(int);
};
struct B : A, virtual V {
using A::x; // #cwg39-using-A-x
float &x(float);
using A::y; // #cwg39-using-A-y
static float &y(float);
using V::z;
float &z(float);
};
struct C : A, B, virtual V {} c;
/* expected-warning@-1
{{direct base 'A' is inaccessible due to ambiguity:
struct cwg39::example2::C -> A
struct cwg39::example2::C -> B -> A}} */
int &x = c.x(0);
// expected-error@-1 {{member 'x' found in multiple base classes of different types}}
// expected-note@#cwg39-A-x-decl {{member found by ambiguous name lookup}}
// expected-note@#cwg39-using-A-x {{member found by ambiguous name lookup}}
// FIXME: This is valid, because we find the same static data member either way.
int &y = c.y(0);
// expected-error@-1 {{member 'y' found in multiple base classes of different types}}
// expected-note@#cwg39-A-y-decl {{member found by ambiguous name lookup}}
// expected-note@#cwg39-using-A-y {{member found by ambiguous name lookup}}
int &z = c.z(0);
}
namespace example3 {
struct A { static int f(); };
struct B : virtual A { using A::f; };
struct C : virtual A { using A::f; };
struct D : B, C {} d;
int k = d.f();
}
namespace example4 {
struct A { int n; }; // #cwg39-ex4-A-n
struct B : A {};
struct C : A {};
struct D : B, C { int f() { return n; } };
/* expected-error@-1
{{non-static member 'n' found in multiple base-class subobjects of type 'A':
struct cwg39::example4::D -> B -> A
struct cwg39::example4::D -> C -> A}} */
// expected-note@#cwg39-ex4-A-n {{member found by ambiguous name lookup}}
}
namespace PR5916 {
// FIXME: This is valid.
struct A { int n; }; // #cwg39-A-n
struct B : A {};
struct C : A {};
struct D : B, C {};
int k = sizeof(D::n); // #cwg39-sizeof
/* expected-error@#cwg39-sizeof
{{non-static member 'n' found in multiple base-class subobjects of type 'A':
struct cwg39::PR5916::D -> B -> A
struct cwg39::PR5916::D -> C -> A}} */
// expected-note@#cwg39-A-n {{member found by ambiguous name lookup}}
// expected-error@#cwg39-sizeof {{unknown type name}}
#if __cplusplus >= 201103L
decltype(D::n) n;
/* expected-error@-1
{{non-static member 'n' found in multiple base-class subobjects of type 'A':
struct cwg39::PR5916::D -> B -> A
struct cwg39::PR5916::D -> C -> A}} */
// expected-note@#cwg39-A-n {{member found by ambiguous name lookup}}
#endif
}
}
// cwg40: na
namespace cwg41 { // cwg41: yes
struct S f(S);
}
namespace cwg42 { // cwg42: yes
struct A { static const int k = 0; };
struct B : A { static const int k = A::k; };
}
// cwg43: na
namespace cwg44 { // cwg44: sup 727
struct A {
template<int> void f();
template<> void f<0>();
};
}
namespace cwg45 { // cwg45: yes
class A {
class B {};
class C : B {};
C c;
};
}
namespace cwg46 { // cwg46: yes
template<typename> struct A { template<typename> struct B {}; };
template template struct A<int>::B<int>;
// expected-error@-1 {{expected unqualified-id}}
}
namespace cwg47 { // cwg47: sup 329
template<typename T> struct A {
friend void f() { T t; } // #cwg47-f
// expected-error@-1 {{redefinition of 'f'}}
// expected-note@#cwg47-b {{in instantiation of template class 'cwg47::A<float>' requested here}}
// expected-note@#cwg47-f {{previous definition is here}}
};
A<int> a;
A<float> b; // #cwg47-b
void f();
void g() { f(); }
}
namespace cwg48 { // cwg48: yes
namespace {
struct S {
static const int m = 0;
static const int n = 0;
static const int o = 0;
};
}
int a = S::m;
// FIXME: We should produce a 'has internal linkage but is not defined'
// diagnostic for 'S::n'.
const int &b = S::n;
const int S::o;
const int &c = S::o;
}
namespace cwg49 { // cwg49: 2.8
template<int*> struct A {}; // #cwg49-A
int k;
#if __has_feature(cxx_constexpr)
constexpr
#endif
int *const p = &k; // #cwg49-p
A<&k> a;
A<p> b; // #cwg49-b
// cxx98-error@#cwg49-b {{non-type template argument referring to object 'p' with internal linkage is a C++11 extension}}
// cxx98-note@#cwg49-p {{non-type template argument refers to object here}}
// cxx98-14-error@#cwg49-b {{non-type template argument for template parameter of pointer type 'int *' must have its address taken}}
// cxx98-14-note@#cwg49-A {{template parameter is declared here}}
int *q = &k; // #cwg49-q
A<q> c; // #cwg49-c
// cxx98-error@#cwg49-c {{non-type template argument for template parameter of pointer type 'int *' must have its address taken}}
// cxx98-note@#cwg49-A {{template parameter is declared here}}
// cxx11-14-error@#cwg49-c {{non-type template argument of type 'int *' is not a constant expression}}
// cxx11-14-note@#cwg49-c {{read of non-constexpr variable 'q' is not allowed in a constant expression}}
// cxx11-14-note@#cwg49-q {{declared here}}
// cxx11-14-note@#cwg49-A {{template parameter is declared here}}
// since-cxx17-error@#cwg49-c {{non-type template argument is not a constant expression}}
// since-cxx17-note@#cwg49-c {{read of non-constexpr variable 'q' is not allowed in a constant expression}}
// since-cxx17-note@#cwg49-q {{declared here}}
}
namespace cwg50 { // cwg50: yes
struct X; // #cwg50-X
extern X *p;
X *q = (X*)p;
X *r = static_cast<X*>(p);
X *s = const_cast<X*>(p);
X *t = reinterpret_cast<X*>(p);
X *u = dynamic_cast<X*>(p);
// expected-error@-1 {{'cwg50::X' is an incomplete type}}
// expected-note@#cwg50-X {{forward declaration of 'cwg50::X'}}
}
namespace cwg51 { // cwg51: 2.8
struct A {};
struct B : A {};
struct S {
operator A&();
operator B&();
} s;
A &a = s;
}
namespace cwg52 { // cwg52: 2.8
struct A { int n; }; // #cwg52-A
struct B : private A {} b; // #cwg52-B
int k = b.A::n; // #cwg52-k
// FIXME: This first diagnostic is very strangely worded, and seems to be bogus.
// expected-error@#cwg52-k {{'A' is a private member of 'cwg52::A'}}
// expected-note@#cwg52-B {{constrained by private inheritance here}}
// expected-note@#cwg52-A {{member is declared here}}
// expected-error@#cwg52-k {{cannot cast 'struct B' to its private base class 'cwg52::A'}}
// expected-note@#cwg52-B {{declared private here}}
}
namespace cwg53 { // cwg53: yes
int n = 0;
enum E { e } x = static_cast<E>(n);
}
namespace cwg54 { // cwg54: 2.8
struct A { int a; } a;
struct V { int v; } v;
struct B : private A, virtual V { int b; } b; // #cwg54-B
A &sab = static_cast<A&>(b);
// expected-error@-1 {{cannot cast 'struct B' to its private base class 'A'}}
// expected-note@#cwg54-B {{declared private here}}
A *spab = static_cast<A*>(&b);
// expected-error@-1 {{cannot cast 'struct B' to its private base class 'A'}}
// expected-note@#cwg54-B {{declared private here}}
int A::*smab = static_cast<int A::*>(&B::b);
// expected-error@-1 {{cannot cast 'cwg54::B' to its private base class 'cwg54::A'}}
// expected-note@#cwg54-B {{declared private here}}
B &sba = static_cast<B&>(a);
// expected-error@-1 {{cannot cast private base class 'cwg54::A' to 'cwg54::B'}}
// expected-note@#cwg54-B {{declared private here}}
B *spba = static_cast<B*>(&a);
// expected-error@-1 {{cannot cast private base class 'cwg54::A' to 'cwg54::B'}}
// expected-note@#cwg54-B {{declared private here}}
int B::*smba = static_cast<int B::*>(&A::a);
// expected-error@-1 {{cannot cast private base class 'cwg54::A' to 'cwg54::B'}}
// expected-note@#cwg54-B {{declared private here}}
V &svb = static_cast<V&>(b);
V *spvb = static_cast<V*>(&b);
int V::*smvb = static_cast<int V::*>(&B::b);
// expected-error@-1 {{conversion from pointer to member of class 'cwg54::B' to pointer to member of class 'cwg54::V' via virtual base 'cwg54::V' is not allowed}}
B &sbv = static_cast<B&>(v);
// expected-error@-1 {{cannot cast 'struct V' to 'B &' via virtual base 'cwg54::V'}}
B *spbv = static_cast<B*>(&v);
// expected-error@-1 {{cannot cast 'cwg54::V *' to 'B *' via virtual base 'cwg54::V'}}
int B::*smbv = static_cast<int B::*>(&V::v);
// expected-error@-1 {{conversion from pointer to member of class 'cwg54::V' to pointer to member of class 'cwg54::B' via virtual base 'cwg54::V' is not allowed}}
A &cab = (A&)(b);
A *cpab = (A*)(&b);
int A::*cmab = (int A::*)(&B::b);
B &cba = (B&)(a);
B *cpba = (B*)(&a);
int B::*cmba = (int B::*)(&A::a);
V &cvb = (V&)(b);
V *cpvb = (V*)(&b);
int V::*cmvb = (int V::*)(&B::b);
// expected-error@-1 {{conversion from pointer to member of class 'cwg54::B' to pointer to member of class 'cwg54::V' via virtual base 'cwg54::V' is not allowed}}
B &cbv = (B&)(v);
// expected-error@-1 {{cannot cast 'struct V' to 'B &' via virtual base 'cwg54::V'}}
B *cpbv = (B*)(&v);
// expected-error@-1 {{cannot cast 'cwg54::V *' to 'B *' via virtual base 'cwg54::V'}}
int B::*cmbv = (int B::*)(&V::v);
// expected-error@-1 {{conversion from pointer to member of class 'cwg54::V' to pointer to member of class 'cwg54::B' via virtual base 'cwg54::V' is not allowed}}
}
namespace cwg55 { // cwg55: yes
enum E { e = 5 };
static_assert(e + 1 == 6, "");
}
namespace cwg56 { // cwg56: yes
struct A {
typedef int T; // #cwg56-typedef-int-T-first
typedef int T;
// expected-error@-1 {{redefinition of 'T'}}
// expected-note@#cwg56-typedef-int-T-first {{previous definition is here}}
};
struct B {
struct X;
typedef X X; // #cwg56-typedef-X-X-first
typedef X X;
// expected-error@-1 {{redefinition of 'X'}}
// expected-note@#cwg56-typedef-X-X-first {{previous definition is here}}
};
}
namespace cwg58 { // cwg58: 3.1
// FIXME: Ideally, we should have a CodeGen test for this.
#if __cplusplus >= 201103L
enum E1 { E1_0 = 0, E1_1 = 1 };
enum E2 { E2_0 = 0, E2_m1 = -1 };
struct X { E1 e1 : 1; E2 e2 : 1; };
static_assert(X{E1_1, E2_m1}.e1 == 1, "");
static_assert(X{E1_1, E2_m1}.e2 == -1, "");
#endif
}
namespace cwg59 { // cwg59: yes
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-volatile"
template<typename T> struct convert_to { operator T() const; };
struct A {}; // #cwg59-A
struct B : A {}; // #cwg59-B
A a1 = convert_to<A>();
A a2 = convert_to<A&>();
A a3 = convert_to<const A>();
A a4 = convert_to<const volatile A>();
// cxx98-14-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::A'}}
// cxx98-14-note@#cwg59-A {{candidate constructor (the implicit copy constructor) not viable: 1st argument ('const volatile cwg59::A') would lose volatile qualifier}}
// cxx11-14-note@#cwg59-A {{candidate constructor (the implicit move constructor) not viable: 1st argument ('const volatile cwg59::A') would lose const and volatile qualifiers}}
// cxx98-14-note@#cwg59-A {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
A a5 = convert_to<const volatile A&>();
// expected-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::A'}}
// expected-note@#cwg59-A {{candidate constructor (the implicit copy constructor) not viable: 1st argument ('const volatile cwg59::A') would lose volatile qualifier}}
// since-cxx11-note@#cwg59-A {{candidate constructor (the implicit move constructor) not viable: 1st argument ('const volatile cwg59::A') would lose const and volatile qualifiers}}
// expected-note@#cwg59-A {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
B b1 = convert_to<B>();
B b2 = convert_to<B&>();
B b3 = convert_to<const B>();
B b4 = convert_to<const volatile B>();
// cxx98-14-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::B'}}
// cxx98-14-note@#cwg59-B {{candidate constructor (the implicit copy constructor) not viable: 1st argument ('const volatile cwg59::B') would lose volatile qualifier}}
// cxx11-14-note@#cwg59-B {{candidate constructor (the implicit move constructor) not viable: 1st argument ('const volatile cwg59::B') would lose const and volatile qualifiers}}
// cxx98-14-note@#cwg59-B {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
B b5 = convert_to<const volatile B&>();
// expected-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::B'}}
// expected-note@#cwg59-B {{candidate constructor (the implicit copy constructor) not viable: 1st argument ('const volatile cwg59::B') would lose volatile qualifier}}
// since-cxx11-note@#cwg59-B {{candidate constructor (the implicit move constructor) not viable: 1st argument ('const volatile cwg59::B') would lose const and volatile qualifiers}}
// expected-note@#cwg59-B {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
A c1 = convert_to<B>();
A c2 = convert_to<B&>();
A c3 = convert_to<const B>();
A c4 = convert_to<const volatile B>();
// expected-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::B'}}
// expected-note@#cwg59-A {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'const volatile cwg59::B' to 'const A &' for 1st argument}}
// since-cxx11-note@#cwg59-A {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'const volatile cwg59::B' to 'A &&' for 1st argument}}
// expected-note@#cwg59-A {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
A c5 = convert_to<const volatile B&>();
// expected-error@-1 {{no viable constructor copying variable of type 'const volatile cwg59::B'}}
// expected-note@#cwg59-A {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'const volatile cwg59::B' to 'const A &' for 1st argument}}
// since-cxx11-note@#cwg59-A {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'const volatile cwg59::B' to 'A &&' for 1st argument}}
// expected-note@#cwg59-A {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
int n1 = convert_to<int>();
int n2 = convert_to<int&>();
int n3 = convert_to<const int>();
int n4 = convert_to<const volatile int>();
int n5 = convert_to<const volatile int&>();
#pragma clang diagnostic pop
}
namespace cwg60 { // cwg60: yes
void f(int &);
int &f(...);
const int k = 0;
int &n = f(k);
}
namespace cwg61 { // cwg61: 3.4
struct X {
static void f();
} x;
struct Y {
static void f();
static void f(int);
} y;
// This is (presumably) valid, because x.f does not refer to an overloaded
// function name.
void (*p)() = &x.f;
void (*q)() = &y.f;
// expected-error@-1 {{cannot create a non-constant pointer to member function}}
void (*r)() = y.f;
// expected-error@-1 {{cannot create a non-constant pointer to member function}}
}
namespace cwg62 { // cwg62: 2.9
struct A {
struct { int n; } b;
};
template<typename T> struct X {};
template<typename T> T get() { return get<T>(); }
template<typename T> int take(T) { return 0; }
X<A> x1;
A a = get<A>();
typedef struct { } *NoNameForLinkagePtr; // #cwg62-unnamed
NoNameForLinkagePtr noNameForLinkagePtr;
struct Danger {
NoNameForLinkagePtr p;
};
X<NoNameForLinkagePtr> x2;
// cxx98-error@-1 {{template argument uses unnamed type}}
// cxx98-note@#cwg62-unnamed {{unnamed type used in template argument was declared here}}
X<const NoNameForLinkagePtr> x3;
// cxx98-error@-1 {{template argument uses unnamed type}}
// cxx98-note@#cwg62-unnamed {{unnamed type used in template argument was declared here}}
NoNameForLinkagePtr p1 = get<NoNameForLinkagePtr>();
// cxx98-error@-1 {{template argument uses unnamed type}}
// cxx98-note@#cwg62-unnamed {{unnamed type used in template argument was declared here}}
NoNameForLinkagePtr p2 = get<const NoNameForLinkagePtr>();
// cxx98-error@-1 {{template argument uses unnamed type}}
// cxx98-note@#cwg62-unnamed {{unnamed type used in template argument was declared here}}
int n1 = take(noNameForLinkagePtr);
// cxx98-error@-1 {{template argument uses unnamed type}}
// cxx98-note@#cwg62-unnamed {{unnamed type used in template argument was declared here}}
X<Danger> x4;
void f() {
struct NoLinkage {};
X<NoLinkage> a;
// cxx98-error@-1 {{template argument uses local type }}
X<const NoLinkage> b;
// cxx98-error@-1 {{template argument uses local type }}
get<NoLinkage>();
// cxx98-error@-1 {{template argument uses local type }}
get<const NoLinkage>();
// cxx98-error@-1 {{template argument uses local type }}
X<void (*)(NoLinkage A::*)> c;
// cxx98-error@-1 {{template argument uses local type }}
X<int NoLinkage::*> d;
// cxx98-error@-1 {{template argument uses local type }}
}
}
namespace cwg63 { // cwg63: yes
template<typename T> struct S { typename T::error e; };
extern S<int> *p;
void *q = p;
}
namespace cwg64 { // cwg64: yes
template<class T> void f(T);
template<class T> void f(T*);
template<> void f(int*);
template<> void f<int>(int*);
template<> void f(int);
}
// cwg65: na
namespace cwg66 { // cwg66: no
namespace X {
int f(int n); // #cwg66-f-first
}
using X::f;
namespace X {
int f(int n = 0);
int f(int, int);
}
// FIXME: The first two calls here should be accepted.
int a = f();
// expected-error@-1 {{no matching function for call to 'f'}}
// expected-note@#cwg66-f-first {{candidate function not viable: requires single argument 'n', but no arguments were provided}}
int b = f(1);
int c = f(1, 2);
// expected-error@-1 {{no matching function for call to 'f'}}
// expected-note@#cwg66-f-first {{candidate function not viable: requires single argument 'n', but 2 arguments were provided}}
}
// cwg67: na
namespace cwg68 { // cwg68: 2.8
template<typename T> struct X {};
struct ::cwg68::X<int> x1;
struct ::cwg68::template X<int> x2;
// cxx98-error@-1 {{'template' keyword outside of a template}}
struct Y {
friend struct X<int>;
friend struct ::cwg68::X<char>;
friend struct ::cwg68::template X<double>;
// cxx98-error@-1 {{'template' keyword outside of a template}}
};
template<typename>
struct Z {
friend struct ::cwg68::template X<double>;
friend typename ::cwg68::X<double>;
// cxx98-error@-1 {{unelaborated friend declaration is a C++11 extension; specify 'struct' to befriend 'typename ::cwg68::X<double>'}}
};
}
namespace cwg69 { // cwg69: 9
template<typename T> static void f() {} // #cwg69-f
// FIXME: Should we warn here?
inline void g() { f<int>(); }
extern template void f<char>();
// cxx98-error@-1 {{extern templates are a C++11 extension}}
// expected-error@-2 {{explicit instantiation declaration of 'f' with internal linkage}}
template<void(*)()> struct Q {};
Q<&f<int> > q;
// cxx98-error@-1 {{non-type template argument referring to function 'f<int>' with internal linkage is a C++11 extension}}
// cxx98-note@#cwg69-f {{non-type template argument refers to function here}}
}
namespace cwg70 { // cwg70: yes
template<int> struct A {};
template<int I, int J> int f(int (&)[I + J], A<I>, A<J>);
int arr[7];
int k = f(arr, A<3>(), A<4>());
}
// cwg71: na
// cwg72: dup 69
#if __cplusplus >= 201103L
namespace cwg73 { // cwg73: sup 1652
int a, b;
static_assert(&a + 1 != &b, "");
// expected-error@-1 {{static assertion expression is not an integral constant expression}}
// expected-note@-2 {{comparison against pointer '&a + 1' that points past the end of a complete object has unspecified value}}
}
#endif
namespace cwg74 { // cwg74: yes
enum E { k = 5 };
int (*p)[k] = new int[k][k];
}
namespace cwg75 { // cwg75: yes
struct S {
static int n = 0;
// expected-error@-1 {{non-const static data member must be initialized out of line}}
};
}
namespace cwg76 { // cwg76: yes
const volatile int n = 1;
static_assert(n, "");
// expected-error@-1 {{static assertion expression is not an integral constant expression}}
// expected-note@-2 {{read of volatile-qualified type 'const volatile int' is not allowed in a constant expression}}
}
namespace cwg77 { // cwg77: yes
struct A {
struct B {};
friend struct B;
};
}
namespace cwg78 { // cwg78: sup ????
// Under CWG78, this is valid, because 'k' has static storage duration, so is
// zero-initialized.
const int k;
// expected-error@-1 {{default initialization of an object of const type 'const int'}}
}
// cwg79: na
namespace cwg80 { // cwg80: 2.9
struct A {
int A;
};
struct B {
static int B;
// expected-error@-1 {{member 'B' has the same name as its class}}
};
struct C {
int C;
// expected-error@-1 {{member 'C' has the same name as its class}}
C();
};
struct D {
D();
int D;
// expected-error@-1 {{member 'D' has the same name as its class}}
};
}
// cwg81: na
// cwg82: dup 48
namespace cwg83 { // cwg83: yes
int &f(const char*);
char &f(char *);
int &k = f("foo");
}
namespace cwg84 { // cwg84: yes
struct B;
struct A { operator B() const; };
struct C {};
struct B {
B(B&); // #cwg84-copy-ctor
B(C); // #cwg84-ctor-from-C
operator C() const;
};
A a;
// Cannot use B(C) / operator C() pair to construct the B from the B temporary
// here. In C++17, we initialize the B object directly using 'A::operator B()'.
B b = a;
// cxx98-14-error@-1 {{no viable constructor copying variable of type 'B'}}
// cxx98-14-note@#cwg84-copy-ctor {{candidate constructor not viable: expects an lvalue for 1st argument}}
// cxx98-14-note@#cwg84-ctor-from-C {{candidate constructor not viable: no known conversion from 'B' to 'C' for 1st argument}}
}
namespace cwg85 { // cwg85: 3.4
struct A {
struct B;
struct B {}; // #cwg85-B-def
struct B;
// expected-error@-1 {{class member cannot be redeclared}}
// expected-note@#cwg85-B-def {{previous declaration is here}}
union U;
union U {}; // #cwg85-U-def
union U;
// expected-error@-1 {{class member cannot be redeclared}}
// expected-note@#cwg85-U-def {{previous declaration is here}}
#if __cplusplus >= 201103L
enum E1 : int;
enum E1 : int { e1 }; // #cwg85-E1-def
enum E1 : int;
// expected-error@-1 {{class member cannot be redeclared}}
// expected-note@#cwg85-E1-def {{previous declaration is here}}
enum class E2;
enum class E2 { e2 }; // #cwg85-E2-def
enum class E2;
// expected-error@-1 {{class member cannot be redeclared}}
// expected-note@#cwg85-E2-def {{previous declaration is here}}
#endif
};
template <typename T>
struct C {
struct B {}; // #cwg85-C-B-def
struct B;
// expected-error@-1 {{class member cannot be redeclared}}
// expected-note@#cwg85-C-B-def {{previous declaration is here}}
};
}
// cwg86: dup 446
namespace cwg87 { // cwg87: no
// FIXME: Superseded by cwg1975
template<typename T> struct X {};
// FIXME: This is invalid.
X<void() throw()> x;
// This is valid under cwg87 but not under cwg1975.
X<void(void() throw())> y;
}
namespace cwg88 { // cwg88: 2.8
template<typename T> struct S {
static const int a = 1; // #cwg88-a
static const int b;
};
template<> const int S<int>::a = 4;
// expected-error@-1 {{static data member 'a' already has an initializer}}
// expected-note@#cwg88-a {{previous initialization is here}}
template<> const int S<int>::b = 4;
}
// cwg89: na
namespace cwg90 { // cwg90: yes
struct A {
template<typename T> friend void cwg90_f(T);
};
struct B : A {
template<typename T> friend void cwg90_g(T);
struct C {};
union D {};
};
struct E : B {};
struct F : B::C {};
void test() {
cwg90_f(A());
cwg90_f(B());
cwg90_f(B::C());
// expected-error@-1 {{use of undeclared identifier 'cwg90_f'}}
cwg90_f(B::D());
// expected-error@-1 {{use of undeclared identifier 'cwg90_f'}}
cwg90_f(E());
cwg90_f(F());
// expected-error@-1 {{use of undeclared identifier 'cwg90_f'}}
cwg90_g(A());
// expected-error@-1 {{use of undeclared identifier 'cwg90_g'}}
cwg90_g(B());
cwg90_g(B::C());
cwg90_g(B::D());
cwg90_g(E());
cwg90_g(F());
// expected-error@-1 {{use of undeclared identifier 'cwg90_g'}}
}
}
namespace cwg91 { // cwg91: yes
union U { friend int f(U); };
int k = f(U());
}
namespace cwg92 { // cwg92: 4 c++17
void f() throw(int, float);
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
void (*p)() throw(int) = &f; // #cwg92-p
// since-cxx17-error@#cwg92-p {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@#cwg92-p {{use 'noexcept(false)' instead}}
// cxx98-14-error@#cwg92-p {{target exception specification is not superset of source}}
// since-cxx17-warning@#cwg92-p {{target exception specification is not superset of source}}
void (*q)() throw(int);
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
void (**pp)() throw() = &q;
// cxx98-14-error@-1 {{exception specifications are not allowed beyond a single level of indirection}}
// since-cxx17-error@-2 {{cannot initialize a variable of type 'void (**)() throw()' with an rvalue of type 'void (**)() throw(int)'}}
void g(void() throw()); // #cwg92-g
// cxx98-14-warning@-1 {{mangled name of 'g' will change in C++17 due to non-throwing exception specification in function signature}}
void h() throw() {
g(f);
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{no matching function for call to 'g'}}
// since-cxx17-note@#cwg92-g {{candidate function not viable: no known conversion from 'void () throw(int, float)' to 'void (*)() throw()' for 1st argument}}
g(q);
// cxx98-14-error@-1 {{target exception specification is not superset of source}}
// since-cxx17-error@-2 {{no matching function for call to 'g'}}
// since-cxx17-note@#cwg92-g {{candidate function not viable: no known conversion from 'void (*)() throw(int)' to 'void (*)() throw()' for 1st argument}}
}
// Prior to C++17, this is OK because the exception specification is not
// considered in this context. In C++17, we *do* perform an implicit
// conversion (which performs initialization), and the exception specification
// is part of the type of the parameter, so this is invalid.
template<void() throw()> struct X {};
X<&f> xp;
// since-cxx17-error@-1 {{value of type 'void (*)() throw(int, float)' is not implicitly convertible to 'void (*)() throw()'}}
template<void() throw(int)> struct Y {};
// since-cxx17-error@-1 {{ISO C++17 does not allow dynamic exception specifications}}
// since-cxx17-note@-2 {{use 'noexcept(false)' instead}}
Y<&h> yp; // ok
}
// cwg93: na
namespace cwg94 { // cwg94: yes
struct A { static const int n = 5; };
int arr[A::n];
}
namespace cwg95 { // cwg95: 3.3
struct A;
struct B;
namespace N {
class C {
friend struct A;
friend struct B;
static void f(); // #cwg95-C-f
};
struct A *p; // cwg95::A, not cwg95::N::A.
}
A *q = N::p; // ok, same type
struct B { void f() { N::C::f(); } };
// expected-error@-1 {{'f' is a private member of 'cwg95::N::C'}}
// expected-note@#cwg95-C-f {{implicitly declared private here}}
}
namespace cwg96 { // cwg96: sup P1787
struct A {
void f(int);
template<typename T> int f(T);
template<typename T> struct S {};
} a;
template<template<typename> class X> struct B {};
template<typename T>
void test() {
int k1 = a.template f<int>(0);
// FIXME: This is ill-formed, because 'f' is not a template-id and does not
// name a class template.
// FIXME: What about alias templates?
int k2 = a.template f(1);
// expected-error@-1 {{a template argument list is expected after a name prefixed by the template keyword}}
A::template S<int> s;
B<A::template S> b;
}
}
namespace cwg97 { // cwg97: yes
struct A {
static const int a = false;
static const int b = !a;
};
}
namespace cwg98 { // cwg98: yes
void test(int n) {
switch (n) {
try { // #cwg98-try
case 0:
// expected-error@-1 {{cannot jump from switch statement to this case label}}
// expected-note@#cwg98-try {{jump bypasses initialization of try block}}
x:
throw n;
} catch (...) { // #cwg98-catch
case 1:
// expected-error@-1 {{cannot jump from switch statement to this case label}}
// expected-note@#cwg98-catch {{jump bypasses initialization of catch block}}
y:
throw n;
}
case 2:
goto x;
// expected-error@-1 {{cannot jump from this goto statement to its label}}
// expected-note@#cwg98-try {{jump bypasses initialization of try block}}
case 3:
goto y;
// expected-error@-1 {{cannot jump from this goto statement to its label}}
// expected-note@#cwg98-catch {{jump bypasses initialization of catch block}}
}
}
}
namespace cwg99 { // cwg99: sup 214
template<typename T> void f(T&);
template<typename T> int &f(const T&);
const int n = 0;
int &r = f(n);
}
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