// RUN: %clang_cc1 -std=c++98 %s -verify=expected,cxx98-17,cxx98-14,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
// RUN: %clang_cc1 -std=c++11 %s -verify=expected,cxx11-20,cxx98-17,cxx11-17,cxx98-14,since-cxx11,cxx11 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
// RUN: %clang_cc1 -std=c++14 %s -verify=expected,cxx11-20,cxx98-17,cxx11-17,cxx98-14,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
// RUN: %clang_cc1 -std=c++17 %s -verify=expected,cxx11-20,cxx98-17,cxx11-17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
// RUN: %clang_cc1 -std=c++20 %s -verify=expected,cxx11-20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
// RUN: %clang_cc1 -std=c++23 %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors -fno-spell-checking
#if __cplusplus == 199711L
#define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
// cxx98-error@-1 {{variadic macros are a C99 feature}}
#endif
namespace cwg600 { // cwg600: 2.8
struct S {
void f(int);
private:
void f(double); // #cwg600-f-double
};
void g(S *sp) {
sp->f(2);
// access control is applied after overload resolution
sp->f(2.2);
// expected-error@-1 {{'f' is a private member of 'cwg600::S'}}
// expected-note@#cwg600-f-double {{declared private here}}
}
} // namespace cwg600
namespace std {
struct type_info {};
__extension__ typedef __SIZE_TYPE__ size_t;
} // namespace std
namespace cwg601 { // cwg601: yes
#if __cplusplus >= 201103L
#define MAX __LLONG_MAX__
#else
#define MAX __LONG_MAX__
#endif
#if 0x8000 < -1
#error 0x8000 should be signed
#endif
#if MAX > 0xFFFFFFFF && 0x80000000 < -1
#error 0x80000000 should be signed
#endif
#if __INT_MAX__ == 0x7FFFFFFF
static_assert(0x80000000 < -1, "0x80000000 should be unsigned");
#endif
#if MAX > 0xFFFFFFFFFFFFFFFF && 0x8000000000000000 < -1
#error 0x8000000000000000 should be signed
#endif
#if __cplusplus >= 201103L && __LLONG_MAX__ == 0x7FFFFFFFFFFFFFFF
static_assert(0x8000000000000000 < -1, "0x8000000000000000 should be unsigned");
#endif
#undef MAX
}
namespace cwg602 { // cwg602: yes
template<class T> struct A {
template<class U> friend struct A;
};
template<class T> struct B {
class C {
template<class U> friend struct B;
typedef int type;
};
typename C::type ct; // ok, befriended
};
B<int> b;
}
namespace cwg603 { // cwg603: yes
template<unsigned char> struct S {};
typedef S<'\001'> S1;
typedef S<(1ul << __CHAR_BIT__) + 1> S1;
// since-cxx11-error@-1 {{cannot be narrowed}}
}
// cwg604: na
// cwg605 is in cwg605.cpp
namespace cwg606 { // cwg606: 3.0
#if __cplusplus >= 201103L
template<typename T> struct S {};
template<typename T> void f(S<T> &&); // #cwg606-f
template<typename T> void g(T &&);
template<typename T> void h(const T &&); // #cwg606-h
void test(S<int> s) {
f(s);
// since-cxx11-error@-1 {{no matching function for call to 'f'}}
// since-cxx11-note@#cwg606-f {{candidate function [with T = int] not viable: expects an rvalue for 1st argument}}
g(s);
h(s);
// since-cxx11-error@-1 {{no matching function for call to 'h'}}
// since-cxx11-note@#cwg606-h {{candidate function [with T = cwg606::S<int>] not viable: expects an rvalue for 1st argument}}
g(test);
h(test); // ok, an rvalue reference can bind to a function lvalue
}
#endif
}
namespace cwg607 { // cwg607: yes
namespace example1 {
struct Y {};
template <typename T> struct X : public virtual Y {};
template <typename T> class A : public X<T> {
template <typename S> A(S) : S() {}
};
template A<int>::A(Y);
} // namespace example1
namespace example2 {
namespace N {
struct B {
B(int);
};
typedef B typedef_B;
struct D : B {
D();
};
} // namespace N
N::D::D() : typedef_B(0) {}
} // namespace example2
} // namespace cwg607
namespace cwg608 { // cwg608: yes
struct A { virtual void f(); };
struct B : A {};
struct C : A { void f(); };
struct D : B, C {};
}
static_assert(-0u == 0u, ""); // cwg610: yes
namespace cwg611 { // cwg611: yes
int k;
struct S { int &r; } s = { k ? k : k };
}
// cwg612: na
namespace cwg613 { // cwg613: yes c++11
// see also n2253
struct A { int n; static void f(); };
int f(int);
struct B { virtual void f(); };
B &g(int);
int an1 = sizeof(A::n);
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
int an2 = sizeof(A::n + 1); // valid per cwg850
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
int an3 = sizeof A::n;
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
int an4 = sizeof(f(A::n));
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
int an5 = sizeof(g(A::n));
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
const std::type_info &an6 = typeid(A::n);
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
const std::type_info &an7 = typeid(A::n + 1);
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
const std::type_info &an8 = typeid(f(A::n));
// cxx98-error@-1 {{invalid use of non-static data member 'n'}}
const std::type_info &an9 = typeid(g(A::n));
// expected-error@-1 {{invalid use of non-static data member 'n'}}
void A::f() {
int an1 = sizeof n;
// cxx98-error@-1 {{invalid use of member 'n' in static member function}}
const std::type_info &an2 = typeid(n + 1);
// cxx98-error@-1 {{invalid use of member 'n' in static member function}}
const std::type_info &an3 = typeid(g(n));
// cxx98-error@-1 {{invalid use of member 'n' in static member function}}
// since-cxx11-error@-2 {{invalid use of non-static data member 'n'}}
}
}
static_assert((-1) / 2 == 0, ""); // cwg614: yes
static_assert((-1) % 2 == -1, "");
namespace cwg615 { // cwg615: yes
int f();
static int n = f();
}
namespace cwg616 { // cwg616: 4
#if __cplusplus >= 201103L
struct S { int n; } s;
S f();
using T = decltype((S().n));
using T = decltype((static_cast<S&&>(s).n));
using T = decltype((f().n));
using T = decltype(S().*&S::n);
using T = decltype(static_cast<S&&>(s).*&S::n);
using T = decltype(f().*&S::n);
using T = int&&;
using U = decltype(S().n);
using U = decltype(static_cast<S&&>(s).n);
using U = int;
#endif
}
namespace cwg618 { // cwg618: yes
#if (unsigned)-1 > 0
#error wrong
#endif
}
namespace cwg619 { // cwg619: yes
extern int x[10];
struct S { static int x[10]; };
int x[];
static_assert(sizeof(x) == sizeof(int) * 10, "");
extern int x[];
static_assert(sizeof(x) == sizeof(int) * 10, "");
int S::x[];
static_assert(sizeof(S::x) == sizeof(int) * 10, "");
void f() {
extern int x[];
sizeof(x);
// expected-error@-1 {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
}
// cwg620: dup 568
namespace cwg621 { // cwg621: yes
template<typename T> T f();
template<> int f() {} // #cwg621-f
template<> int f<int>() {}
// expected-error@-1 {{redefinition of 'f<int>'}}
// expected-note@#cwg621-f {{previous definition is here}}
}
// cwg623: na
// FIXME: Add documentation saying we allow invalid pointer values.
// cwg624 needs a libc++abi test.
namespace cwg625 { // cwg625: yes
template<typename T> struct A {};
A<auto> x = A<int>();
// cxx98-error@-1 {{'auto' type specifier is a C++11 extension}}
// expected-error@-2 {{'auto' not allowed in template argument}}
void f(int);
void (*p)(auto) = f;
// cxx98-error@-1 {{'auto' type specifier is a C++11 extension}}
// expected-error@-2 {{'auto' not allowed in function prototype}}
}
namespace cwg626 { // cwg626: yes
#define STR(x) #x
char c[2] = STR(c); // ok, type matches
wchar_t w[2] = STR(w);
// expected-error@-1 {{initializing wide char array with non-wide string literal}}
}
namespace cwg627 { // cwg627: yes
void f() {
// FIXME: emitted diagnostic have a room for improvement
true a = 0;
// expected-error@-1 {{expected ';' after expression}}
// expected-error@-2 {{use of undeclared identifier 'a'}}
// expected-warning@-3 {{expression result unused}}
}
}
// cwg628: na
namespace cwg629 { // cwg629: 2.9
typedef int T;
int n = 1;
void f() {
auto T = 2; // #cwg629-T
// cxx98-error@-1 {{expected unqualified-id}}
auto T(n);
// since-cxx11-error@-1 {{redefinition of 'T'}}
// since-cxx11-note@#cwg629-T {{previous definition is here}}
}
}
namespace cwg630 { // cwg630: yes
const bool MB_EQ_WC =
' ' == L' ' && '\t' == L'\t' && '\v' == L'\v' && '\r' == L'\r' &&
'\n' == L'\n' && //
'a' == L'a' && 'b' == L'b' && 'c' == L'c' && 'd' == L'd' && 'e' == L'e' &&
'f' == L'f' && 'g' == L'g' && 'h' == L'h' && 'i' == L'i' && 'j' == L'j' &&
'k' == L'k' && 'l' == L'l' && 'm' == L'm' && 'n' == L'n' && 'o' == L'o' &&
'p' == L'p' && 'q' == L'q' && 'r' == L'r' && 's' == L's' && 't' == L't' &&
'u' == L'u' && 'v' == L'v' && 'w' == L'w' && 'x' == L'x' && 'y' == L'y' &&
'z' == L'z' && //
'A' == L'A' && 'B' == L'B' && 'C' == L'C' && 'D' == L'D' && 'E' == L'E' &&
'F' == L'F' && 'G' == L'G' && 'H' == L'H' && 'I' == L'I' && 'J' == L'J' &&
'K' == L'K' && 'L' == L'L' && 'M' == L'M' && 'N' == L'N' && 'O' == L'O' &&
'P' == L'P' && 'Q' == L'Q' && 'R' == L'R' && 'S' == L'S' && 'T' == L'T' &&
'U' == L'U' && 'V' == L'V' && 'W' == L'W' && 'X' == L'X' && 'Y' == L'Y' &&
'Z' == L'Z' && //
'0' == L'0' && '1' == L'1' && '2' == L'2' && '3' == L'3' && '4' == L'4' &&
'5' == L'5' && '6' == L'6' && '7' == L'7' && '8' == L'8' &&
'9' == L'9' && //
'_' == L'_' && '{' == L'{' && '}' == L'}' && '[' == L'[' && ']' == L']' &&
'#' == L'#' && '(' == L'(' && ')' == L')' && '<' == L'<' && '>' == L'>' &&
'%' == L'%' && ':' == L':' && ';' == L';' && '.' == L'.' && '?' == L'?' &&
'*' == L'*' && '+' == L'+' && '-' == L'-' && '/' == L'/' && '^' == L'^' &&
'&' == L'&' && '|' == L'|' && '~' == L'~' && '!' == L'!' && '=' == L'=' &&
',' == L',' && '\\' == L'\\' && '"' == L'"' && '\'' == L'\'';
#if __STDC_MB_MIGHT_NEQ_WC__
#ifndef __FreeBSD__ // PR22208, FreeBSD expects us to give a bad (but conforming) answer here.
static_assert(!MB_EQ_WC, "__STDC_MB_MIGHT_NEQ_WC__ but all basic source characters have same representation");
#endif
#else
static_assert(MB_EQ_WC, "!__STDC_MB_MIGHT_NEQ_WC__ but some character differs");
#endif
}
// cwg631: na
namespace cwg632 { // cwg632: yes
struct S { int n; } s = {{5}};
// expected-warning@-1 {{braces around scalar initializer}}
}
// cwg633: na
// see also n2993
namespace cwg634 { // cwg634: yes
struct S { S(); S(const S&); virtual void f(); ~S(); };
int f(...);
char f(int);
template<typename T> int (&g(T))[sizeof f(T())];
int (&a)[sizeof(int)] = g(S());
int (&b)[1] = g(0);
int k = f(S());
// cxx98-error@-1 {{cannot pass object of non-POD type 'S' through variadic function; call will abort at runtime}}
// since-cxx11-error@-2 {{cannot pass object of non-trivial type 'S' through variadic function; call will abort at runtime}}
}
namespace cwg635 { // cwg635: yes
template<typename T> struct A { A(); ~A(); };
template<typename T> A<T>::A<T>() {}
// expected-error@-1 {{out-of-line constructor for 'A' cannot have template arguments}}
template<typename T> A<T>::~A<T>() {}
template<typename T> struct B { B(); ~B(); };
template<typename T> B<T>::B() {}
template<typename T> B<T>::~B() {}
struct C { template<typename T> C(); C(); };
template<typename T> C::C() {}
C::C() {}
template<> C::C<int>() {}
// expected-error@-1 {{qualified reference to 'C' is a constructor name rather than a type in this context}}
// expected-error@-2 {{expected unqualified-id}}
/*FIXME: needed for error recovery:*/;
template<typename T> struct D { template<typename U> D(); D(); };
template<typename T> D<T>::D() {} // #cwg635-D
template<typename T> template<typename U> D<T>::D() {}
template<typename T> D<T>::D<T>() {} // #cwg635-D-T
// expected-error@#cwg635-D-T {{out-of-line constructor for 'D' cannot have template arguments}}
// expected-error@#cwg635-D-T {{redefinition of 'D<T>'}}
// expected-note@#cwg635-D {{previous definition is here}}
}
namespace cwg637 { // cwg637: yes
void f(int i) {
i = ++i + 1;
i = i++ + 1;
// cxx98-14-warning@-1 {{multiple unsequenced modifications to 'i'}}
}
}
namespace cwg638 { // cwg638: no
template<typename T> struct A {
struct B;
void f();
void g();
struct C {
void h();
};
};
class X {
typedef int type;
template<class T> friend struct A<T>::B;
// expected-warning@-1 {{dependent nested name specifier 'A<T>::' for friend class declaration is not supported; turning off access control for 'X'}}
template<class T> friend void A<T>::f();
// expected-warning@-1 {{dependent nested name specifier 'A<T>::' for friend class declaration is not supported; turning off access control for 'X'}}
template<class T> friend void A<T>::g();
// expected-warning@-1 {{dependent nested name specifier 'A<T>::' for friend class declaration is not supported; turning off access control for 'X'}}
template<class T> friend void A<T>::C::h();
// expected-warning@-1 {{dependent nested name specifier 'A<T>::C::' for friend class declaration is not supported; turning off access control for 'X'}}
};
template<> struct A<int> {
X::type a; // FIXME: private
struct B {
X::type b; // ok
};
int f() { X::type c; } // FIXME: private
void g() { X::type d; } // ok
struct D {
void h() { X::type e; } // FIXME: private
};
};
}
namespace cwg639 { // cwg639: 3.3
void f(int i) {
void((i = 0) + (i = 0));
// expected-warning@-1 {{multiple unsequenced modifications to 'i'}}
}
}
namespace cwg641 { // cwg641: yes
namespace std_example {
struct abc;
struct xyz {
xyz(); // #cwg641-xyz-ctor
xyz(xyz &); // #cwg641-xyz-copy-ctor
operator xyz &() = delete;
// expected-warning@-1 {{conversion function converting 'cwg641::std_example::xyz' to itself will never be used}}
// cxx98-error@-2 {{deleted function definitions are a C++11 extension}}
operator abc &() = delete;
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
};
struct abc : xyz {};
template<typename T>
void use(T &); // #cwg641-use
void test() {
use<xyz>(xyz());
// expected-error@-1 {{no matching function for call to 'use'}}
// expected-note@#cwg641-use {{candidate function template not viable: expects an lvalue for 1st argument}}
use<const xyz>(xyz());
// cxx98-error@-1 {{no viable constructor copying parameter of type 'xyz'; C++98 requires a copy constructor when binding a reference to a temporary}}
// cxx98-note@#cwg641-xyz-copy-ctor {{candidate constructor not viable: expects an lvalue for 1st argument}}
// cxx98-note@#cwg641-xyz-ctor {{candidate constructor not viable: requires 0 arguments, but 1 was provided}}
}
}
template<typename T> struct error { typedef typename T::error type; };
struct A {
template<typename T, typename error<T>::type = 0> operator T() const;
// cxx98-error@-1 {{default template arguments for a function template are a C++11 extension}}
};
A a;
void f(A&); // #cwg641-f
void g(const A ca) {
f(A());
// expected-error@-1 {{no matching function for call to 'f'}}
// expected-note@#cwg641-f {{candidate function not viable: expects an lvalue for 1st argument}}
f(ca);
// expected-error@-1 {{no matching function for call to 'f'}}
// expected-note@#cwg641-f {{candidate function not viable: 1st argument ('const A') would lose const qualifier}}
(void)A();
(void)ca;
}
}
namespace cwg642 { // cwg642: yes
void f() {
const int i = 2;
{
char i[i];
static_assert(sizeof(i) == 2, "");
}
}
struct s { int a; };
void g(int s) {
struct s *p = new struct s;
p->a = s;
}
}
#if __cplusplus >= 201103L
namespace cwg643 { // cwg643: 3.2
struct A {
int x;
auto f() -> decltype(this->x);
auto f(A &a) -> decltype(a.x);
auto g() -> decltype(x);
auto h() -> decltype(this->y);
// since-cxx11-error@-1 {{no member named 'y' in 'cwg643::A'}}
auto h(A &a) -> decltype(a.y);
// since-cxx11-error@-1 {{no member named 'y' in 'cwg643::A'}}
auto i() -> decltype(y);
// since-cxx11-error@-1 {{use of undeclared identifier 'y'}}
int y;
};
}
#endif
#if __cplusplus >= 201103L
namespace cwg644 { // cwg644: partial
struct A {
A() = default;
int x, y;
};
static_assert(__is_literal_type(A), "");
struct B : A {};
static_assert(__is_literal_type(B), "");
struct C : virtual A {};
static_assert(!__is_literal_type(C), "");
struct D { C c; };
static_assert(!__is_literal_type(D), "");
// FIXME: According to CWG644, E<C> is a literal type despite having virtual
// base classes. This appears to be a wording defect.
template<typename T>
struct E : T {
constexpr E() = default;
};
static_assert(!__is_literal_type(E<C>), "");
}
#endif
// cwg645 increases permission to optimize; it's not clear that it's possible to
// test for this.
// cwg645: na
#if __cplusplus >= 201103L
namespace cwg646 { // cwg646: sup 981
struct A {
constexpr A(const A&) = default; // ok
};
struct B {
constexpr B() {}
B(B&);
};
constexpr B b = {}; // ok
}
#endif
#if __cplusplus >= 201103L
namespace cwg647 { // cwg647: 3.1
// This is partially superseded by cwg1358.
struct A {
constexpr virtual void f() const;
constexpr virtual void g() const {}
// cxx11-17-error@-1 {{virtual function cannot be constexpr}}
};
struct X { virtual void f() const; }; // #cwg647-f
struct B : X {
constexpr void f() const {}
// cxx11-17-error@-1 {{virtual function cannot be constexpr}}
// cxx11-17-note@#cwg647-f {{overridden virtual function is here}}
};
struct NonLiteral { NonLiteral() {} }; // #cwg647-NonLiteral
struct C {
constexpr C(NonLiteral);
constexpr C(NonLiteral, int) {}
// cxx11-20-error@-1 {{constexpr constructor's 1st parameter type 'NonLiteral' is not a literal type}}
// cxx11-20-note@#cwg647-NonLiteral {{'NonLiteral' is not literal because it is not an aggregate and has no constexpr constructors other than copy or move constructors}}
constexpr C() try {} catch (...) {}
// cxx11-17-error@-1 {{function try block in constexpr constructor is a C++20 extension}}
// cxx11-error@-2 {{use of this statement in a constexpr constructor is a C++14 extension}}
};
struct D {
operator int() const;
constexpr D(int) {}
D(float); // #cwg647-D-float-ctor
};
constexpr int get();
struct E {
int n;
D d;
// FIXME: We should diagnose this, as the conversion function is not
// constexpr. However, that part of this issue is supreseded by cwg1364 and
// others; no diagnostic is required for this any more.
constexpr E()
: n(D(0)),
d(0) {}
constexpr E(int)
// cxx11-20-error@-1 {{constexpr constructor never produces a constant expression}}
// cxx11-20-note@#cwg647-int-d {{non-constexpr constructor 'D' cannot be used in a constant expression}}
// cxx11-20-note@#cwg647-D-float-ctor {{declared here}}
: n(0),
d(0.0f) {} // #cwg647-int-d
constexpr E(float f)
// cxx11-20-error@-1 {{never produces a constant expression}}
// cxx11-20-note@#cwg647-float-d {{non-constexpr constructor}}
// cxx11-20-note@#cwg647-D-float-ctor {{declared here}}
: n(get()),
d(D(0) + f) {} // #cwg647-float-d
};
}
#endif
#if __cplusplus >= 201103L
namespace cwg648 { // cwg648: yes
int f();
constexpr int a = (true ? 1 : f());
constexpr int b = false && f();
constexpr int c = true || f();
}
#endif
#if __cplusplus >= 201103L
namespace cwg649 { // cwg649: 3.5
// Maximum alignment is 8192 bytes for Windows, and 4 GB for Linux
alignas(0x200000000) int n;
// since-cxx11-error-re@-1 {{{{requested alignment must be (8192|4294967296) bytes or smaller}}}}
struct alignas(0x200000000) X {};
// since-cxx11-error-re@-1 {{{{requested alignment must be (8192|4294967296) bytes or smaller}}}}
struct Y {
int n alignas(0x200000000);
// since-cxx11-error-re@-1 {{{{requested alignment must be (8192|4294967296) bytes or smaller}}}}
};
struct alignas(256) Z {};
// This part is superseded by cwg2130 and eventually by aligned allocation support.
auto *p = new Z;
}
#endif
// cwg650 is in cwg650.cpp
#if __cplusplus >= 201103L
namespace cwg651 { // cwg651: yes
struct X {
virtual X &f();
};
struct Y : X {
Y &f();
};
using T = decltype(((X&&)Y()).f());
using T = X &;
}
#endif
#if __cplusplus >= 201103L
namespace cwg652 { // cwg652: yes
constexpr int n = 1.2 * 3.4;
static_assert(n == 4, "");
}
#endif
// cwg653 is in cwg653.cpp
#if __cplusplus >= 201103L
namespace cwg654 { // cwg654: sup 1423
void f() {
if (nullptr) {}
// since-cxx11-warning@-1 {{implicit conversion of nullptr constant to 'bool'}}
bool b = nullptr;
// since-cxx11-error@-1 {{cannot initialize a variable of type 'bool' with an rvalue of type 'std::nullptr_t'}}
if (nullptr == 0) {}
if (nullptr != 0) {}
if (nullptr <= 0) {}
// since-cxx11-error@-1 {{invalid operands to binary expression ('std::nullptr_t' and 'int')}}
if (nullptr == 1) {}
// since-cxx11-error@-1 {{invalid operands to binary expression ('std::nullptr_t' and 'int')}}
if (!nullptr) {}
// since-cxx11-warning@-1 {{implicit conversion of nullptr constant to 'bool'}}
decltype(nullptr) n = 0;
static_cast<int>(nullptr);
// since-cxx11-error@-1 {{static_cast from 'std::nullptr_t' to 'int' is not allowed}}
(void)static_cast<decltype(nullptr)>(0);
static_cast<decltype(nullptr)>(1);
// since-cxx11-error@-1 {{static_cast from 'int' to 'decltype(nullptr)' (aka 'std::nullptr_t') is not allowed}}
void(true ? nullptr : 0);
void(true ? 0 : nullptr);
}
}
#endif
namespace cwg655 { // cwg655: yes
struct A { A(int); }; // #cwg655-A
struct B : A {
A a; // #cwg655-a
B();
B(int) : B() {}
// cxx98-error@-1 {{delegating constructors are permitted only in C++11}}
B(int*) : A() {} // #cwg655-delegating-to-A
// expected-error@-1 {{no matching constructor for initialization of 'A'}}
// expected-note@#cwg655-A {{candidate constructor not viable: requires 1 argument, but 0 were provided}}
// expected-note@#cwg655-A {{candidate constructor (the implicit copy constructor) not viable: requires 1 argument, but 0 were provided}}
// since-cxx11-note@#cwg655-A {{candidate constructor (the implicit move constructor) not viable: requires 1 argument, but 0 were provided}}
// expected-error@#cwg655-delegating-to-A {{constructor for 'cwg655::B' must explicitly initialize the member 'a' which does not have a default constructor}}
// expected-note@#cwg655-a {{member is declared here}}
// expected-note@#cwg655-A {{'cwg655::A' declared here}}
};
}
namespace cwg656 { // cwg656: yes
struct A { A(const A&) = delete; };
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
struct B : A {};
struct X { operator B(); } x;
const A &r = x;
struct Y : private A { // #cwg656-Y
operator B() volatile;
};
extern Y y;
extern volatile Y vy;
// Conversion not considered due to reference-related types.
const A &s = y;
// expected-error@-1 {{cannot cast 'const Y' to its private base class 'const A'}}
// expected-note@#cwg656-Y {{declared private here}}
const A &t = vy;
// expected-error@-1 {{binding reference of type 'const A' to value of type 'volatile Y' drops 'volatile' qualifier}}
struct C { operator struct D(); } c;
struct D : C {};
const D &d = c; // ok, D not reference-related to C
template<typename T> void accept(T); // #cwg656-accept-T
template<typename T> void accept(...) = delete; // #cwg656-accept-var
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
void f() {
accept<const A&>(x);
accept<const A&>(y);
// expected-error@-1 {{cannot cast 'const Y' to its private base class 'const cwg656::A'}}
// expected-note@#cwg656-Y {{declared private here}}
accept<const A&>(vy); // #cwg656-vy
// expected-error@-1 {{call to deleted function 'accept'}}
// expected-note@#cwg656-accept-var {{candidate function [with T = const cwg656::A &] has been explicitly deleted}}
// expected-note@#cwg656-accept-T {{candidate function template not viable: no known conversion from 'volatile Y' to 'const A &' for 1st argument}}
// expected-error@#cwg656-vy {{no matching constructor for initialization of 'volatile Y'}}
// expected-note@#cwg656-Y {{candidate constructor (the implicit copy constructor) not viable: 1st argument ('volatile Y') would lose volatile qualifier}}
// expected-note@#cwg656-Y {{candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 1 was provided}}
accept<const D&>(c);
}
}
namespace cwg657 { // cwg657: partial
struct Abs { virtual void x() = 0; }; // #cwg657-Abs
struct Der : public Abs { virtual void x(); };
struct Cnvt { template<typename F> Cnvt(F); };
void foo(Cnvt a);
void foo(Abs &a);
void f(Abs *a) { foo(*a); }
void bar(Abs &a);
template<typename T> void bar(T);
void g(Abs *a) { bar(*a); }
// FIXME: The following examples demonstrate that we might be accepting the
// above cases for the wrong reason.
struct C { C(Abs) {} };
// expected-error@-1 {{parameter type 'Abs' is an abstract class}}
// expected-note@#cwg657-Abs {{unimplemented pure virtual method 'x' in 'Abs'}}
struct Q { operator Abs() { __builtin_unreachable(); } } q;
// expected-error@-1 {{return type 'Abs' is an abstract class}}
#if __cplusplus >= 201703L
// FIXME: We should *definitely* reject this.
C c = Q().operator Abs();
#endif
template<typename F> struct Cnvt2 { Cnvt2(F); typedef int type; };
// FIXME: We should reject this.
void baz(Abs &a);
template<typename T> typename Cnvt2<T>::type baz(T);
void h(Abs *a) { baz(*a); }
// FIXME: We should reject this too.
Cnvt2<Abs>::type err;
}
// cwg658 is in cwg658.cpp
#if __cplusplus >= 201103L
namespace cwg659 { // cwg659: 3.0
static_assert(alignof(char) == alignof(char&), "");
static_assert(alignof(int) == alignof(int&), "");
int n = alignof(int(&)());
// since-cxx11-error@-1 {{invalid application of 'alignof' to a function type}}
struct A; // #cwg659-A
int m = alignof(A&);
// since-cxx11-error@-1 {{invalid application of 'alignof' to an incomplete type 'A'}}
// since-cxx11-note@#cwg659-A {{forward declaration of 'cwg659::A'}}
}
#endif
#if __cplusplus >= 201103L
namespace cwg660 { // cwg660: 3.0
enum : int { a };
enum class { b };
// since-cxx11-error@-1 {{scoped enumeration requires a name}}
auto x = a;
struct X {
enum : int { a };
enum class { b };
// since-cxx11-error@-1 {{scoped enumeration requires a name}}
};
auto y = X::a;
}
#endif
// cwg661 is in cwg661.cpp
namespace cwg662 { // cwg662: yes
template <typename T> void f(T t) {
T &tr = t;
T *tp = &t;
// expected-error@-1 {{'tp' declared as a pointer to a reference of type 'int &'}}
// expected-note@#cwg662-f-call {{in instantiation of function template specialization 'cwg662::f<int &>' requested here}}
#if __cplusplus >= 201103L
auto *ap = &t;
#endif
}
void g(int n) { f<int&>(n); } // #cwg662-f-call
}
namespace cwg663 { // cwg663: sup P1949
int ЍЎ = 123;
}
#if __cplusplus >= 201103L
namespace cwg664 { // cwg664: yes
struct A { A(const A&) = delete; };
A &&f(A &&a, int n) {
if (n)
return f(static_cast<A&&>(a), n - 1);
return static_cast<A&&>(a);
}
}
#endif
namespace cwg665 { // cwg665: 2.8
struct A { virtual ~A(); };
struct B : A {} *b;
struct C : private A {} *c; // #cwg665-C
struct D : B, C {} *d;
struct VB : virtual A {} *vb;
struct VC : private virtual A {} *vc; // #cwg665-VC
struct VD : VB, VC {} *vd;
void f() {
(void)dynamic_cast<A*>(b);
(void)dynamic_cast<A*>(c);
// expected-error@-1 {{cannot cast 'cwg665::C' to its private base class 'cwg665::A'}}
// expected-note@#cwg665-C {{declared private here}}
(void)dynamic_cast<A*>(d);
/* expected-error@-1 {{ambiguous conversion from derived class 'cwg665::D' to base class 'cwg665::A':
struct cwg665::D -> B -> A
struct cwg665::D -> C -> A}} */
(void)dynamic_cast<A*>(vb);
(void)dynamic_cast<A*>(vc); // emitting diagnostic, even though it could be valid at runtime
// expected-error@-1 {{cannot cast 'cwg665::VC' to its private base class 'cwg665::A'}}
// expected-note@#cwg665-VC {{declared private here}}
(void)dynamic_cast<A*>(vd);
}
}
namespace cwg666 { // cwg666: 2.8
struct P { friend P operator*(P, P); P(int); } p(0);
template<int> int f();
template<typename T> int f() {
T::type *p = 0;
// expected-error@-1 {{missing 'typename' prior to dependent type name 'Y::type'}}
// expected-note@#cwg666-f-Y {{in instantiation of function template specialization 'cwg666::f<cwg666::Y>' requested here}}
int a(T::type);
// expected-error@-1 {{missing 'typename' prior to dependent type name 'Y::type'}}
return f<T::type>();
// expected-error@-1 {{missing 'typename' prior to dependent type name 'Y::type'}}
}
struct X { static const int type = 0; };
struct Y { typedef int type; };
int a = f<X>();
int b = f<Y>(); // #cwg666-f-Y
}
// Triviality is entirely different in C++98.
#if __cplusplus >= 201103L
namespace cwg667 { // cwg667: 8
struct A {
A() = default; // #cwg667-A-ctor
// since-cxx11-warning@-1 {{explicitly defaulted default constructor is implicitly deleted}}
// since-cxx11-note@#cwg667-r {{default constructor of 'A' is implicitly deleted because field 'r' of reference type 'int &' would not be initialized}}
// since-cxx11-note@#cwg667-A-ctor {{replace 'default' with 'delete'}}
int &r; // #cwg667-r
};
static_assert(!__is_trivially_constructible(A), "");
struct B { ~B() = delete; };
union C { B b; };
static_assert(!__is_trivially_destructible(C), "");
struct D { D(const D&) = delete; };
struct E : D {};
static_assert(!__is_trivially_constructible(E, const E&), "");
struct F { F &operator=(F&&) = delete; };
struct G : F {};
static_assert(!__is_trivially_assignable(G, G&&), "");
}
#endif
// cwg668 needs an libc++abi test
#if __cplusplus >= 201103L
namespace cwg669 { // cwg669: yes
void f() {
int n;
using T = decltype(n);
using T = int;
using U = decltype((n));
using U = int &;
[=] {
using V = decltype(n);
using V = int;
using W = decltype((n));
using W = const int&;
} ();
struct X {
int n;
void f() const {
using X = decltype(n);
using X = int;
using Y = decltype((n));
using Y = const int&;
}
};
}
}
#endif
namespace cwg671 { // cwg671: 2.9
enum class E { e };
// cxx98-error@-1 {{scoped enumerations are a C++11 extension}}
E e = static_cast<E>(0);
int n = static_cast<int>(E::e);
// cxx98-error@-1 {{use of enumeration in a nested name specifier is a C++11 extension}}
int m = static_cast<int>(e);
}
// cwg672 is in cwg672.cpp
namespace cwg673 { // cwg673: yes
template<typename> struct X { static const int n = 0; };
class A {
friend class B *f();
class C *f();
void f(class D *);
enum { e = X<struct E>::n };
void g() { extern struct F *p; }
};
B *b;
C *c;
D *d;
E *e;
F *f;
// expected-error@-1 {{unknown type name 'F'}}
}
namespace cwg674 { // cwg674: 8
template<typename T> int f(T);
int g(int);
template<typename T> int g(T);
int h(int);
template<typename T> int h(T);
class X {
friend int cwg674::f(int);
friend int cwg674::g(int);
friend int cwg674::h<>(int);
int n; // #cwg674-X-n
};
template<typename T> int f(T) { return X().n; }
int g(int) { return X().n; }
template<typename T> int g(T) { return X().n; }
// expected-error@-1 {{'n' is a private member of 'cwg674::X'}}
// expected-note@#cwg674-g-int {{in instantiation of function template specialization 'cwg674::g<int>' requested here}}
// expected-note@#cwg674-X-n {{implicitly declared private here}}
int h(int) { return X().n; }
// expected-error@-1 {{'n' is a private member of 'cwg674::X'}}
// expected-note@#cwg674-X-n {{implicitly declared private here}}
template<typename T> int h(T) { return X().n; }
template int f(int);
template int g(int); // #cwg674-g-int
template int h(int);
struct Y {
template<typename T> int f(T);
int g(int);
template<typename T> int g(T);
int h(int);
template<typename T> int h(T);
};
class Z {
friend int Y::f(int);
friend int Y::g(int);
friend int Y::h<>(int);
int n; // #cwg674-Z-n
};
template<typename T> int Y::f(T) { return Z().n; }
int Y::g(int) { return Z().n; }
template<typename T> int Y::g(T) { return Z().n; }
// expected-error@-1 {{'n' is a private member of 'cwg674::Z'}}
// expected-note@#cwg674-Y-g-int {{in instantiation of function template specialization 'cwg674::Y::g<int>' requested here}}
// expected-note@#cwg674-Z-n {{implicitly declared private here}}
int Y::h(int) { return Z().n; }
// expected-error@-1 {{'n' is a private member of 'cwg674::Z'}}
// expected-note@#cwg674-Z-n {{implicitly declared private here}}
template<typename T> int Y::h(T) { return Z().n; }
// FIXME: Should the <> be required here?
template int Y::f<>(int);
template int Y::g<>(int); // #cwg674-Y-g-int
template int Y::h<>(int);
}
namespace cwg675 { // cwg675: dup 739
template<typename T> struct A { T n : 1; };
#if __cplusplus >= 201103L
static_assert(A<char>{1}.n < 0, "");
// since-cxx11-warning@-1 {{implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1}}
static_assert(A<int>{1}.n < 0, "");
// since-cxx11-warning@-1 {{implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1}}
static_assert(A<long long>{1}.n < 0, "");
// since-cxx11-warning@-1 {{implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1}}
#endif
}
// cwg676: na
namespace cwg677 { // cwg677: no
struct A {
void *operator new(std::size_t);
void operator delete(void*) = delete; // #cwg677-A-delete
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
};
struct B {
void *operator new(std::size_t);
void operator delete(void*) = delete; // #cwg677-B-delete
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
virtual ~B();
};
void f(A *p) { delete p; }
// expected-error@-1 {{attempt to use a deleted function}}
// expected-note@#cwg677-A-delete {{'operator delete' has been explicitly marked deleted here}}
// FIXME: This appears to be valid; we shouldn't even be looking up the 'operator delete' here.
void f(B *p) { delete p; }
// expected-error@-1 {{attempt to use a deleted function}}
// expected-note@#cwg677-B-delete {{'operator delete' has been explicitly marked deleted here}}
B::~B() {}
// expected-error@-1 {{attempt to use a deleted function}}
// expected-note@#cwg677-B-delete {{'operator delete' has been explicitly marked deleted here}}
}
// cwg678 FIXME: check that the modules ODR check catches this
namespace cwg679 { // cwg679: yes
struct X {};
template<int> void operator+(X, X);
template<> void operator+<0>(X, X) {} // #cwg679-def
template<> void operator+<0>(X, X) {}
// expected-error@-1 {{redefinition of 'operator+<0>'}}
// expected-note@#cwg679-def {{previous definition is here}}
}
// cwg680: na
#if __cplusplus >= 201103L
namespace cwg681 { // cwg681: partial
auto *a() -> int;
// since-cxx11-error@-1 {{function with trailing return type must specify return type 'auto', not 'auto *'}}
auto (*b)() -> int;
// FIXME: The errors here aren't great.
auto (*c()) -> int;
// since-cxx11-error@-1 {{expected function body after function declarator}}
auto ((*d)()) -> int;
// since-cxx11-error@-1 {{declaration of variable 'd' with deduced type 'auto ((*)())' requires an initializer}}
// since-cxx11-error@-2 {{expected ';' after top level declarator}}
// FIXME: This is definitely wrong. This should be
// "function of () returning pointer to function of () returning int"
// not a function with a deduced return type.
auto (*e())() -> int;
// cxx11-error@-1 {{'auto' return without trailing return type; deduced return types are a C++14 extension}}
auto f() -> int (*)();
auto g() -> auto (*)() -> int;
}
#endif
#if __cplusplus >= 201103L
namespace cwg683 { // cwg683: yes
struct A {
A() = default;
A(const A&) = default;
A(A&);
};
static_assert(__is_trivially_constructible(A, const A&), "");
static_assert(!__is_trivially_constructible(A, A&), "");
static_assert(!__is_trivial(A), "");
struct B : A {};
static_assert(__is_trivially_constructible(B, const B&), "");
static_assert(__is_trivially_constructible(B, B&), "");
static_assert(__is_trivial(B), "");
}
#endif
#if __cplusplus >= 201103L
namespace cwg684 { // cwg684: sup 1454
void f() {
int a; // #cwg684-a
constexpr int *p = &a;
// expected-error@-1 {{constexpr variable 'p' must be initialized by a constant expression}}
// expected-note@-2 {{pointer to 'a' is not a constant expression}}
// expected-note@#cwg684-a {{here}}
}
}
#endif
namespace cwg685 { // cwg685: yes
enum E : long { e };
// cxx98-error@-1 {{enumeration types with a fixed underlying type are a C++11 extension}}
void f(int);
int f(long);
int a = f(e);
enum G : short { g };
// cxx98-error@-1 {{enumeration types with a fixed underlying type are a C++11 extension}}
int h(short);
void h(long);
int b = h(g);
int i(int);
void i(long);
int c = i(g);
int j(unsigned int); // #cwg685-j-uint
void j(long); // #cwg685-j-long
int d = j(g);
// expected-error@-1 {{call to 'j' is ambiguous}}
// expected-note@#cwg685-j-uint {{candidate function}}
// expected-note@#cwg685-j-long {{candidate function}}
// Valid per cwg1601
int k(short);
void k(int);
int x = k(g);
}
namespace cwg686 { // cwg686: 3.0
void f() {
(void)dynamic_cast<struct A*>(0);
// expected-error@-1 {{'A' is an incomplete type}}
// expected-note@-2 {{forward declaration of 'A'}}
(void)dynamic_cast<struct A{}*>(0);
// expected-error@-1 {{'A' cannot be defined in a type specifier}}
(void)typeid(struct B*);
(void)typeid(struct B{}*);
// expected-error@-1 {{'B' cannot be defined in a type specifier}}
(void)static_cast<struct C*>(0);
(void)static_cast<struct C{}*>(0);
// expected-error@-1 {{'C' cannot be defined in a type specifier}}
(void)reinterpret_cast<struct D*>(0);
(void)reinterpret_cast<struct D{}*>(0);
// expected-error@-1 {{'D' cannot be defined in a type specifier}}
(void)const_cast<struct E*>(0);
// expected-error@-1 {{const_cast from 'int' to 'struct E *' is not allowed}}
(void)const_cast<struct E{}*>(0);
// expected-error@-1 {{'E' cannot be defined in a type specifier}}
(void)sizeof(struct F*);
(void)sizeof(struct F{}*);
// expected-error@-1 {{'F' cannot be defined in a type specifier}}
(void)new struct G*; // #cwg686-G
(void)new struct G{}*; // #cwg686-G-def
// expected-error@-1 {{allocation of incomplete type 'struct G'}}
// expected-note@#cwg686-G {{forward declaration of 'G'}}
// since-cxx11-error@#cwg686-G-def {{expected expression}}
#if __cplusplus >= 201103L
(void)alignof(struct H*);
(void)alignof(struct H{}*);
// since-cxx11-error@-1 {{'H' cannot be defined in a type specifier}}
#endif
(void)(struct I*)0;
(void)(struct I{}*)0;
// expected-error@-1 {{'I' cannot be defined in a type specifier}}
if (struct J *p = 0) {}
if (struct J {} *p = 0) {}
// expected-error@-1 {{'J' cannot be defined in a condition}}
for (struct K *p = 0; struct L *q = 0; ) {}
for (struct K {} *p = 0; struct L {} *q = 0; ) {}
// expected-error@-1 {{'L' cannot be defined in a condition}}
#if __cplusplus >= 201103L
using M = struct {};
#endif
struct N {
operator struct O{}(){};
// expected-error@-1 {{'N::O' cannot be defined in a type specifier}}
};
try {}
catch (struct P *) {}
// expected-error@-1 {{cannot catch pointer to incomplete type 'struct P'}}
// expected-note@-2 {{forward declaration of 'P'}}
catch (struct P {} *) {}
// expected-error@-1 {{'P' cannot be defined in a type specifier}}
#if __cplusplus < 201703L
void g() throw(struct Q);
// cxx98-17-error@-1 {{incomplete type 'struct Q' is not allowed in exception specification}}
// cxx98-17-note@-2 {{forward declaration of 'Q'}}
void h() throw(struct Q {});
// cxx98-17-error@-1 {{'Q' cannot be defined in a type specifier}}
#endif
}
template<struct R *> struct X;
template<struct R {} *> struct Y;
// expected-error@-1 {{'cwg686::R' cannot be defined in a type specifier}}
}
namespace cwg687 { // cwg687 (9 c++20, but the issue is still considered open)
template<typename T> void f(T a) {
// This is valid in C++20.
g<int>(a);
// cxx98-17-error@-1 {{use of function template name with no prior declaration in function call with explicit template arguments is a C++20 extension}}
// This is not.
template g<int>(a);
// expected-error@-1 {{expected '<' after 'template'}}
}
}
namespace cwg692 { // cwg692: 16
// Also see cwg1395.
namespace temp_func_order_example2 {
template <typename... T> struct A1 {};
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename U, typename... T> struct A2 {};
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename T1, typename... U> void e1(A1<T1, U...>) = delete;
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
// cxx98-error@-2 {{deleted function definitions are a C++11 extension}}
template <typename T1> void e1(A1<T1>);
template <typename T1, typename... U> void e2(A2<T1, U...>) = delete;
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
// cxx98-error@-2 {{deleted function definitions are a C++11 extension}}
template <typename T1> void e2(A2<T1>);
template <typename T, typename U> void f(U, A1<U, T> *p = 0) = delete; // #cwg692-f-deleted
// cxx98-error@-1 {{deleted function definitions are a C++11 extension}}
template <typename U> int &f(U, A1<U, U> *p = 0); // #cwg692-f
template <typename T> void g(T, T = T()); // #cwg692-g
template <typename T, typename... U> void g(T, U...); // #cwg692-g-variadic
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
void h() {
A1<int, int> a;
int &r = f<int>(42, &a);
A1<int> b1;
e1(b1);
A2<int> b2;
e2(b2);
f<int>(42);
// expected-error@-1 {{call to 'f' is ambiguous}}
// expected-note@#cwg692-f-deleted {{candidate function [with T = int, U = int] has been explicitly deleted}}
// expected-note@#cwg692-f {{candidate function [with U = int]}}
g(42);
// expected-error@-1 {{ambiguous}}
// expected-note@#cwg692-g {{candidate function [with T = int]}}
// expected-note@#cwg692-g-variadic {{candidate function [with T = int, U = <>]}}
}
}
namespace temp_func_order_example3 {
template <typename T, typename... U> void f(T, U...);
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename T> void f(T);
template <typename T, typename... U> int &g(T *, U...);
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename T> void g(T);
void h(int i) {
// This is made ambiguous by cwg692, but made valid again by cwg1395.
f(&i);
int &r = g(&i);
}
}
namespace temp_deduct_partial_example {
template <typename... Args> char &f(Args... args);
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename T1, typename... Args> short &f(T1 a1, Args... args);
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <typename T1, typename T2> int &f(T1 a1, T2 a2);
void g() {
char &a = f();
short &b = f(1, 2, 3);
int &c = f(1, 2);
}
}
namespace temp_deduct_type_example1 {
template <class T1, class ...Z> class S;
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <class T1, class ...Z> class S<T1, const Z&...>;
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template <class T1, class T2> class S<T1, const T2&> {};
S<int, const int&> s;
template<class T, class... U> struct A;
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template<class T1, class T2, class... U> struct A<T1,T2*,U...> {};
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template<class T1, class T2> struct A<T1,T2>;
template struct A<int, int*>;
}
namespace temp_deduct_type_example3 {
template<class T, class... U> void f(T*, U...){}
// cxx98-error@-1 {{variadic templates are a C++11 extension}}
template<class T> void f(T){}
template void f(int*);
}
}
namespace cwg696 { // cwg696: 3.1
void f(const int*);
void g() {
const int N = 10; // #cwg696-N
struct A {
void h() {
int arr[N]; (void)arr;
f(&N);
// expected-error@-1 {{reference to local variable 'N' declared in enclosing function 'cwg696::g'}}
// expected-note@#cwg696-N {{'N' declared here}}
}
};
#if __cplusplus >= 201103L
(void) [] { int arr[N]; (void)arr; };
(void)[] { f(&N); };
// since-cxx11-error@-1 {{variable 'N' cannot be implicitly captured in a lambda with no capture-default specified}}
// since-cxx11-note@#cwg696-N {{'N' declared here}}
// since-cxx11-note@-3 {{lambda expression begins here}}
// since-cxx11-note@-4 {{capture 'N' by value}}
// since-cxx11-note@-5 {{capture 'N' by reference}}
// since-cxx11-note@-6 {{default capture by value}}
// since-cxx11-note@-7 {{default capture by reference}}
#endif
}
}
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