blob: c20a873fc1c75dd3f513dce1ac5aa0c327e3387c [file] [log] [blame]
// RUN: %clang_cc1 -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors
// FIXME: This is included to avoid a diagnostic with no source location
// pointing at the implicit operator new. We can't match such a diagnostic
// with -verify.
__extension__ typedef __SIZE_TYPE__ size_t;
void *operator new(size_t); // expected-error 0-1{{missing exception spec}} expected-note{{candidate}}
#if __cplusplus > 201402L
namespace std {
enum class align_val_t : size_t {};
}
void *operator new(size_t, std::align_val_t); // expected-note{{candidate}}
#endif
namespace dr500 { // dr500: dup 372
class D;
class A {
class B;
class C;
friend class D;
};
class A::B {};
class A::C : public A::B {};
class D : public A::B {};
}
namespace dr501 { // dr501: yes
struct A {
friend void f() {}
void g() {
void (*p)() = &f; // expected-error {{undeclared identifier}}
}
};
}
namespace dr502 { // dr502: yes
struct Q {};
template<typename T> struct A {
enum E { e = 1 };
void q1() { f(e); }
void q2() { Q arr[sizeof(E)]; f(arr); }
void q3() { Q arr[e]; f(arr); }
void sanity() { Q arr[1]; f(arr); } // expected-error {{undeclared identifier 'f'}}
};
int f(A<int>::E);
template<int N> int f(Q (&)[N]);
template struct A<int>;
}
namespace dr505 { // dr505: yes
const char *exts = "\e\(\{\[\%"; // expected-error 5{{use of non-standard escape}}
const char *unknown = "\Q"; // expected-error {{unknown escape sequence}}
}
namespace dr506 { // dr506: yes
struct NonPod { ~NonPod(); };
void f(...);
void g(NonPod np) { f(np); } // expected-error {{cannot pass}}
}
// FIXME: Add tests here once DR260 is resolved.
// dr507: dup 260
// dr508: na
// dr509: na
// dr510: na
namespace dr512 { // dr512: yes
struct A {
A(int);
};
union U { A a; };
#if __cplusplus < 201103L
// expected-error@-2 {{has a non-trivial default constructor}}
// expected-note@-6 {{no default constructor}}
// expected-note@-6 {{suppressed by user-declared constructor}}
#endif
}
// dr513: na
namespace dr514 { // dr514: yes
namespace A { extern int x, y; }
int A::x = y;
}
namespace dr515 { // dr515: sup 1017
// FIXME: dr1017 reverses the wording of dr515, but the current draft has
// dr515's wording, with a different fix for dr1017.
struct X { int n; };
template<typename T> struct Y : T {
int f() { return X::n; }
};
int k = Y<X>().f();
struct A { int a; };
struct B { void f() { int k = sizeof(A::a); } };
#if __cplusplus < 201103L
// expected-error@-2 {{invalid use of non-static data member}}
#endif
}
// dr516: na
namespace dr517 { // dr517: no
// This is NDR, but we should diagnose it anyway.
template<typename T> struct S {};
template<typename T> int v = 0; // expected-error 0-1{{extension}}
template struct S<int*>;
template int v<int*>;
S<char&> s;
int k = v<char&>;
// FIXME: These are both ill-formed.
template<typename T> struct S<T*> {};
template<typename T> int v<T*> = 0; // expected-error 0-1{{extension}}
// FIXME: These are both ill-formed.
template<typename T> struct S<T&> {};
template<typename T> int v<T&> = 0; // expected-error 0-1{{extension}}
}
namespace dr518 { // dr518: yes c++11
enum E { e, };
#if __cplusplus < 201103L
// expected-error@-2 {{C++11 extension}}
#endif
}
namespace dr519 { // dr519: yes
// FIXME: Add a codegen test.
#if __cplusplus >= 201103L
#define fold(x) (__builtin_constant_p(x) ? (x) : (x))
int test[fold((int*)(void*)0) ? -1 : 1];
#undef fold
#endif
}
// dr520: na
// dr521: no
// FIXME: The wording here is broken. It's not reasonable to expect a
// diagnostic here. Once the relevant DR gets a number, mark this as a dup.
namespace dr522 { // dr522: yes
struct S {};
template<typename T> void b1(volatile T &);
template<typename T> void b2(volatile T * const *);
template<typename T> void b2(volatile T * const S::*);
template<typename T> void b2(volatile T * const S::* const *);
template<typename T> void b2a(volatile T *S::* const *); // expected-note {{candidate template ignored: deduced type 'volatile int *dr522::S::*const *' of 1st parameter does not match adjusted type 'int *dr522::S::**' of argument}}
template<typename T> struct Base {};
struct Derived : Base<int> {};
template<typename T> void b3(Base<T>);
template<typename T> void b3(Base<T> *);
void test(int n, const int cn, int **p, int *S::*pm) {
int *a[3], *S::*am[3];
const Derived cd = Derived();
Derived d[3];
b1(n);
b1(cn);
b2(p);
b2(pm);
b2(a);
b2(am);
b2a(am); // expected-error {{no matching function}}
b3(d);
b3(cd);
}
}
namespace dr524 { // dr524: yes
template<typename T> void f(T a, T b) { operator+(a, b); } // expected-error {{call}}
struct S {};
void operator+(S, S);
template void f(S, S);
namespace N { struct S {}; }
void operator+(N::S, N::S); // expected-note {{should be declared}}
template void f(N::S, N::S); // expected-note {{instantiation}}
}
namespace dr525 { // dr525: yes
namespace before {
// Note, the example was correct prior to the change; instantiation is
// required for cases like this:
template <class T> struct D { operator T*(); };
void g(D<double> ppp) {
delete ppp;
}
}
namespace after {
template <class T> struct D { typename T::error e; }; // expected-error {{prior to '::'}}
void g(D<double> *ppp) {
delete ppp; // expected-note {{instantiation of}}
}
}
}
namespace dr526 { // dr526: yes
template<int> struct S {};
template<int N> void f1(S<N> s);
template<int N> void f2(S<(N)> s); // expected-note {{couldn't infer}}
template<int N> void f3(S<+N> s); // expected-note {{couldn't infer}}
template<int N> void g1(int (&)[N]);
template<int N> void g2(int (&)[(N)]); // expected-note {{couldn't infer}}
template<int N> void g3(int (&)[+N]); // expected-note {{couldn't infer}}
void test(int (&a)[3], S<3> s) {
f1(s);
f2(s); // expected-error {{no matching}}
f3(s); // expected-error {{no matching}}
g1(a);
g2(a); // expected-error {{no matching}}
g3(a); // expected-error {{no matching}}
}
template<int N> struct X {
typedef int type;
X<N>::type v1;
X<(N)>::type v2; // expected-error {{missing 'typename'}}
X<+N>::type v3; // expected-error {{missing 'typename'}}
};
}
namespace dr527 { // dr527: na
// This DR is meaningless. It removes a required diagnostic from the case
// where a not-externally-visible object is odr-used but not defined, which
// requires a diagnostic for a different reason.
extern struct { int x; } a; // FIXME: We should reject this, per dr389.
static struct { int x; } b;
extern "C" struct { int x; } c;
namespace { extern struct { int x; } d; }
typedef struct { int x; } *P;
struct E { static P e; }; // FIXME: We should reject this, per dr389.
namespace { struct F { static P f; }; }
int ax = a.x, bx = b.x, cx = c.x, dx = d.x, ex = E::e->x, fx = F::f->x;
}
namespace dr530 { // dr530: yes
template<int*> struct S { enum { N = 1 }; };
template<void(*)()> struct T { enum { N = 1 }; };
int n;
void f();
int a[S<&n>::N];
int b[T<&f>::N];
}
namespace dr531 { // dr531: partial
namespace good {
template<typename T> struct A {
void f(T) { T::error; }
template<typename U> void g(T, U) { T::error; }
struct B { typename T::error error; };
template<typename U> struct C { typename T::error error; };
static T n;
};
template<typename T> T A<T>::n = T::error;
template<> void A<int>::f(int) {}
template<> template<typename U> void A<int>::g(int, U) {}
template<> struct A<int>::B {};
template<> template<typename U> struct A<int>::C {};
template<> int A<int>::n = 0;
void use(A<int> a) {
a.f(a.n);
a.g(0, 0);
A<int>::B b;
A<int>::C<int> c;
}
template<> struct A<char> {
void f(char);
template<typename U> void g(char, U);
struct B;
template<typename U> struct C;
static char n;
};
void A<char>::f(char) {}
template<typename U> void A<char>::g(char, U) {}
struct A<char>::B {};
template<typename U> struct A<char>::C {};
char A<char>::n = 0;
}
namespace bad {
template<typename T> struct A {
void f(T) { T::error; }
template<typename U> void g(T, U) { T::error; }
struct B { typename T::error error; };
template<typename U> struct C { typename T::error error; }; // expected-note {{here}}
static T n;
};
template<typename T> T A<T>::n = T::error;
void A<int>::f(int) {} // expected-error {{requires 'template<>'}}
template<typename U> void A<int>::g(int, U) {} // expected-error {{should be empty}}
struct A<int>::B {}; // expected-error {{requires 'template<>'}}
template<typename U> struct A<int>::C {}; // expected-error {{should be empty}} expected-error {{different kind of symbol}}
int A<int>::n = 0; // expected-error {{requires 'template<>'}}
template<> struct A<char> { // expected-note 2{{here}}
void f(char);
template<typename U> void g(char, U);
struct B; // expected-note {{here}}
template<typename U> struct C;
static char n;
};
template<> void A<char>::f(char) {} // expected-error {{no function template matches}}
// FIXME: This is ill-formed; -pedantic-errors should reject.
template<> template<typename U> void A<char>::g(char, U) {} // expected-warning {{extraneous template parameter list}}
template<> struct A<char>::B {}; // expected-error {{extraneous 'template<>'}} expected-error {{does not specialize}}
// FIXME: This is ill-formed; -pedantic-errors should reject.
template<> template<typename U> struct A<char>::C {}; // expected-warning {{extraneous template parameter list}}
template<> char A<char>::n = 0; // expected-error {{extraneous 'template<>'}}
}
namespace nested {
template<typename T> struct A {
template<typename U> struct B;
};
template<> template<typename U> struct A<int>::B {
void f();
void g();
template<typename V> void h();
template<typename V> void i();
};
template<> template<typename U> void A<int>::B<U>::f() {}
template<typename U> void A<int>::B<U>::g() {} // expected-error {{should be empty}}
template<> template<typename U> template<typename V> void A<int>::B<U>::h() {}
template<typename U> template<typename V> void A<int>::B<U>::i() {} // expected-error {{should be empty}}
template<> template<> void A<int>::B<int>::f() {}
template<> template<> template<typename V> void A<int>::B<int>::h() {}
template<> template<> template<> void A<int>::B<int>::h<int>() {}
template<> void A<int>::B<char>::f() {} // expected-error {{requires 'template<>'}}
template<> template<typename V> void A<int>::B<char>::h() {} // expected-error {{should be empty}}
}
}
// PR8130
namespace dr532 { // dr532: 3.5
struct A { };
template<class T> struct B {
template<class R> int &operator*(R&);
};
template<class T, class R> float &operator*(T&, R&);
void test() {
A a;
B<A> b;
int &ir = b * a;
}
}
// dr533: na
namespace dr534 { // dr534: yes
struct S {};
template<typename T> void operator+(S, T);
template<typename T> void operator+<T*>(S, T*) {} // expected-error {{function template partial spec}}
}
namespace dr535 { // dr535: yes
class X { private: X(const X&); };
struct A {
X x;
template<typename T> A(T&);
};
struct B : A {
X y;
B(volatile A&);
};
extern A a1;
A a2(a1); // ok, uses constructor template
extern volatile B b1;
B b2(b1); // ok, uses converting constructor
void f() { throw a1; }
#if __cplusplus >= 201103L
struct C {
constexpr C() : n(0) {}
template<typename T> constexpr C(T&t) : n(t.n == 0 ? throw 0 : 0) {}
int n;
};
constexpr C c() { return C(); }
// ok, copy is elided
constexpr C x = c();
#endif
}
// dr537: na
// dr538: na
// dr539: yes
const dr539( // expected-error {{requires a type specifier}}
const a) { // expected-error {{unknown type name 'a'}}
const b; // expected-error {{requires a type specifier}}
new const; // expected-error {{expected a type}}
try {} catch (const n) {} // expected-error {{unknown type name 'n'}}
try {} catch (const) {} // expected-error {{expected a type}}
if (const n = 0) {} // expected-error {{requires a type specifier}}
switch (const n = 0) {} // expected-error {{requires a type specifier}}
while (const n = 0) {} // expected-error {{requires a type specifier}}
for (const n = 0; // expected-error {{requires a type specifier}}
const m = 0; ) {} // expected-error {{requires a type specifier}}
sizeof(const); // expected-error {{requires a type specifier}}
struct S {
const n; // expected-error {{requires a type specifier}}
operator const(); // expected-error {{expected a type}}
};
#if __cplusplus >= 201103L
int arr[3];
// FIXME: The extra braces here are to avoid the parser getting too
// badly confused when recovering here. We should fix this recovery.
{ for (const n // expected-error {{unknown type name 'n'}} expected-note {{}}
: arr) ; {} } // expected-error +{{}}
(void) [](const) {}; // expected-error {{requires a type specifier}}
(void) [](const n) {}; // expected-error {{unknown type name 'n'}}
enum E : const {}; // expected-error {{expected a type}}
using T = const; // expected-error {{expected a type}}
auto f() -> const; // expected-error {{expected a type}}
#endif
}
namespace dr540 { // dr540: yes
typedef int &a;
typedef const a &a; // expected-warning {{has no effect}}
typedef const int &b;
typedef b &b;
typedef const a &c; // expected-note {{previous}} expected-warning {{has no effect}}
typedef const b &c; // expected-error {{different}} expected-warning {{has no effect}}
}
namespace dr541 { // dr541: yes
template<int> struct X { typedef int type; };
template<typename T> struct S {
int f(T);
int g(int);
T g(bool);
int h();
int h(T);
void x() {
// These are type-dependent expressions, even though we could
// determine that all calls have type 'int'.
X<sizeof(f(0))>::type a; // expected-error +{{}}
X<sizeof(g(0))>::type b; // expected-error +{{}}
X<sizeof(h(0))>::type b; // expected-error +{{}}
typename X<sizeof(f(0))>::type a;
typename X<sizeof(h(0))>::type b;
}
};
}
namespace dr542 { // dr542: yes
#if __cplusplus >= 201103L
struct A { A() = delete; int n; };
A a[32] = {}; // ok, constructor not called
struct B {
int n;
private:
B() = default;
};
B b[32] = {}; // ok, constructor not called
#endif
}
namespace dr543 { // dr543: yes
// In C++98+DR543, this is valid because value-initialization doesn't call a
// trivial default constructor, so we never notice that defining the
// constructor would be ill-formed.
//
// In C++11+DR543, this is ill-formed, because the default constructor is
// deleted, and value-initialization *does* call a deleted default
// constructor, even if it is trivial.
struct A {
const int n;
};
A a = A();
#if __cplusplus >= 201103L
// expected-error@-2 {{deleted}}
// expected-note@-5 {{would not be initialized}}
#endif
}
namespace dr544 { // dr544: yes
int *n;
template<class T> struct A { int n; };
template<class T> struct B : A<T> { int get(); };
template<> int B<int>::get() { return n; }
int k = B<int>().get();
}
namespace dr546 { // dr546: yes
template<typename T> struct A { void f(); };
template struct A<int>;
template<typename T> void A<T>::f() { T::error; }
}
namespace dr547 { // dr547: yes
template<typename T> struct X;
template<typename T> struct X<T() const> {};
template<typename T, typename C> X<T> f(T C::*) { return X<T>(); }
struct S { void f() const; };
X<void() const> x = f(&S::f);
}
namespace dr548 { // dr548: dup 482
template<typename T> struct S {};
template<typename T> void f() {}
template struct dr548::S<int>;
template void dr548::f<int>();
}
namespace dr551 { // dr551: yes c++11
// FIXME: This obviously should apply in C++98 mode too.
template<typename T> void f() {}
template inline void f<int>();
#if __cplusplus >= 201103L
// expected-error@-2 {{cannot be 'inline'}}
#endif
template<typename T> inline void g() {}
template inline void g<int>();
#if __cplusplus >= 201103L
// expected-error@-2 {{cannot be 'inline'}}
#endif
template<typename T> struct X {
void f() {}
};
template inline void X<int>::f();
#if __cplusplus >= 201103L
// expected-error@-2 {{cannot be 'inline'}}
#endif
}
namespace dr552 { // dr552: yes
template<typename T, typename T::U> struct X {};
struct Y { typedef int U; };
X<Y, 0> x;
}
struct dr553_class {
friend void *operator new(size_t, dr553_class);
};
namespace dr553 {
dr553_class c;
// Contrary to the apparent intention of the DR, operator new is not actually
// looked up with a lookup mechanism that performs ADL; the standard says it
// "is looked up in global scope", where it is not visible.
void *p = new (c) int; // expected-error {{no matching function}}
struct namespace_scope {
friend void *operator new(size_t, namespace_scope); // expected-error {{cannot be declared inside a namespace}}
};
}
// dr556: na
namespace dr557 { // dr557: yes
template<typename T> struct S {
friend void f(S<T> *);
friend void g(S<S<T> > *);
};
void x(S<int> *p, S<S<int> > *q) {
f(p);
g(q);
}
}
namespace dr558 { // dr558: yes
wchar_t a = L'\uD7FF';
wchar_t b = L'\xD7FF';
wchar_t c = L'\uD800'; // expected-error {{invalid universal character}}
wchar_t d = L'\xD800';
wchar_t e = L'\uDFFF'; // expected-error {{invalid universal character}}
wchar_t f = L'\xDFFF';
wchar_t g = L'\uE000';
wchar_t h = L'\xE000';
}
template<typename> struct dr559 { typedef int T; dr559::T u; }; // dr559: yes
namespace dr561 { // dr561: yes
template<typename T> void f(int);
template<typename T> void g(T t) {
f<T>(t);
}
namespace {
struct S {};
template<typename T> static void f(S);
}
void h(S s) {
g(s);
}
}
namespace dr564 { // dr564: yes
extern "C++" void f(int);
void f(int); // ok
extern "C++" { extern int n; }
int n; // ok
}
namespace dr565 { // dr565: yes
namespace N {
template<typename T> int f(T); // expected-note {{target}}
}
using N::f; // expected-note {{using}}
template<typename T> int f(T*);
template<typename T> void f(T);
template<typename T, int = 0> int f(T); // expected-error 0-1{{extension}}
template<typename T> int f(T, int = 0);
template<typename T> int f(T); // expected-error {{conflicts with}}
}
namespace dr566 { // dr566: yes
#if __cplusplus >= 201103L
int check[int(-3.99) == -3 ? 1 : -1];
#endif
}
// dr567: na
namespace dr568 { // dr568: yes c++11
// FIXME: This is a DR issue against C++98, so should probably apply there
// too.
struct x { int y; };
class trivial : x {
x y;
public:
int n;
};
int check_trivial[__is_trivial(trivial) ? 1 : -1];
struct std_layout {
std_layout();
std_layout(const std_layout &);
~std_layout();
private:
int n;
};
int check_std_layout[__is_standard_layout(std_layout) ? 1 : -1];
struct aggregate {
int x;
int y;
trivial t;
std_layout sl;
};
aggregate aggr = {};
void f(...);
void g(trivial t) { f(t); }
#if __cplusplus < 201103L
// expected-error@-2 {{non-POD}}
#endif
void jump() {
goto x;
#if __cplusplus < 201103L
// expected-error@-2 {{cannot jump}}
// expected-note@+2 {{non-POD}}
#endif
trivial t;
x: ;
}
}
namespace dr569 { // dr569: yes c++11
// FIXME: This is a DR issue against C++98, so should probably apply there
// too.
;;;;;
#if __cplusplus < 201103L
// expected-error@-2 {{C++11 extension}}
#endif
}
namespace dr570 { // dr570: dup 633
int n;
int &r = n; // expected-note {{previous}}
int &r = n; // expected-error {{redefinition}}
}
namespace dr571 { // dr571 unknown
// FIXME: Add a codegen test.
typedef int &ir;
int n;
const ir r = n; // expected-warning {{has no effect}} FIXME: Test if this has internal linkage.
}
namespace dr572 { // dr572: yes
enum E { a = 1, b = 2 };
int check[a + b == 3 ? 1 : -1];
}
namespace dr573 { // dr573: no
void *a;
int *b = reinterpret_cast<int*>(a);
void (*c)() = reinterpret_cast<void(*)()>(a);
void *d = reinterpret_cast<void*>(c);
#if __cplusplus < 201103L
// expected-error@-3 {{extension}}
// expected-error@-3 {{extension}}
#endif
void f() { delete a; } // expected-error {{cannot delete}}
int n = d - a; // expected-error {{arithmetic on pointers to void}}
// FIXME: This is ill-formed.
template<void*> struct S;
template<int*> struct T;
}
namespace dr574 { // dr574: yes
struct A {
A &operator=(const A&) const; // expected-note {{does not match because it is const}}
};
struct B {
B &operator=(const B&) volatile; // expected-note {{nearly matches}}
};
#if __cplusplus >= 201103L
struct C {
C &operator=(const C&) &; // expected-note {{not viable}} expected-note {{nearly matches}} expected-note {{here}}
};
struct D {
D &operator=(const D&) &&; // expected-note {{not viable}} expected-note {{nearly matches}} expected-note {{here}}
};
void test(C c, D d) {
c = c;
C() = c; // expected-error {{no viable}}
d = d; // expected-error {{no viable}}
D() = d;
}
#endif
struct Test {
friend A &A::operator=(const A&); // expected-error {{does not match}}
friend B &B::operator=(const B&); // expected-error {{does not match}}
#if __cplusplus >= 201103L
// FIXME: We shouldn't produce the 'cannot overload' diagnostics here.
friend C &C::operator=(const C&); // expected-error {{does not match}} expected-error {{cannot overload}}
friend D &D::operator=(const D&); // expected-error {{does not match}} expected-error {{cannot overload}}
#endif
};
}
namespace dr575 { // dr575: yes
template<typename T, typename U = typename T::type> void a(T); void a(...); // expected-error 0-1{{extension}}
template<typename T, typename T::type U = 0> void b(T); void b(...); // expected-error 0-1{{extension}}
template<typename T, int U = T::value> void c(T); void c(...); // expected-error 0-1{{extension}}
template<typename T> void d(T, int = T::value); void d(...); // expected-error {{cannot be used prior to '::'}}
void x() {
a(0);
b(0);
c(0);
d(0); // expected-note {{in instantiation of default function argument}}
}
template<typename T = int&> void f(T* = 0); // expected-error 0-1{{extension}}
template<typename T = int> void f(T = 0); // expected-error 0-1{{extension}}
void g() { f<>(); }
template<typename T> T &h(T *);
template<typename T> T *h(T *);
void *p = h((void*)0);
}
namespace dr576 { // dr576: yes
typedef void f() {} // expected-error {{function definition declared 'typedef'}}
void f(typedef int n); // expected-error {{invalid storage class}}
void f(char c) { typedef int n; }
}
namespace dr577 { // dr577: yes
typedef void V;
typedef const void CV;
void a(void);
void b(const void); // expected-error {{qualifiers}}
void c(V);
void d(CV); // expected-error {{qualifiers}}
void (*e)(void) = c;
void (*f)(const void); // expected-error {{qualifiers}}
void (*g)(V) = a;
void (*h)(CV); // expected-error {{qualifiers}}
template<typename T> void i(T); // expected-note 2{{requires 1 arg}}
template<typename T> void j(void (*)(T)); // expected-note 2{{argument may not have 'void' type}}
void k() {
a();
c();
i<void>(); // expected-error {{no match}}
i<const void>(); // expected-error {{no match}}
j<void>(0); // expected-error {{no match}}
j<const void>(0); // expected-error {{no match}}
}
}
namespace dr580 { // dr580: partial
class C;
struct A { static C c; };
struct B { static C c; };
class C {
C(); // expected-note {{here}}
~C(); // expected-note {{here}}
typedef int I; // expected-note 2{{here}}
template<int> struct X;
template<int> friend struct Y;
template<int> void f();
template<int> friend void g();
friend struct A;
};
template<C::I> struct C::X {};
template<C::I> struct Y {};
template<C::I> struct Z {}; // expected-error {{private}}
struct C2 {
class X {
struct A;
typedef int I;
friend struct A;
};
class Y {
template<X::I> struct A {}; // FIXME: We incorrectly accept this
// because we think C2::Y::A<...> might
// instantiate to C2::X::A
};
};
template<C::I> void C::f() {}
template<C::I> void g() {}
template<C::I> void h() {} // expected-error {{private}}
C A::c;
C B::c; // expected-error 2{{private}}
}
// dr582: na
namespace dr583 { // dr583: 4
// see n3624
int *p;
bool b1 = p < 0; // expected-error {{ordered comparison between pointer and zero}}
bool b2 = p > 0; // expected-error {{ordered comparison between pointer and zero}}
bool b3 = p <= 0; // expected-error {{ordered comparison between pointer and zero}}
bool b4 = p >= 0; // expected-error {{ordered comparison between pointer and zero}}
}
// dr584: na
namespace dr585 { // dr585: yes
template<typename> struct T;
struct A {
friend T;
#if __cplusplus <= 201402L
// expected-error@-2 {{requires a type specifier}} expected-error@-2 {{can only be classes or functions}}
#else
// expected-error@-4 {{use of class template 'T' requires template arguments; argument deduction not allowed in friend declaration}}
// expected-note@-7 {{here}}
#endif
// FIXME: It's not clear whether the standard allows this or what it means,
// but the DR585 writeup suggests it as an alternative.
template<typename U> friend T<U>; // expected-error {{must use an elaborated type}}
};
template<template<typename> class T> struct B {
friend T;
#if __cplusplus <= 201402L
// expected-error@-2 {{requires a type specifier}} expected-error@-2 {{can only be classes or functions}}
#else
// expected-error@-4 {{use of template template parameter 'T' requires template arguments; argument deduction not allowed in friend declaration}}
// expected-note@-6 {{here}}
#endif
template<typename U> friend T<U>; // expected-error {{must use an elaborated type}}
};
}
// dr586: na
namespace dr587 { // dr587: yes
template<typename T> void f(bool b, const T x, T y) {
const T *p = &(b ? x : y);
}
struct S {};
template void f(bool, const int, int);
template void f(bool, const S, S);
}
namespace dr588 { // dr588: yes
struct A { int n; }; // expected-note {{ambiguous}}
template<typename T> int f() {
struct S : A, T { int f() { return n; } } s;
int a = s.f();
int b = s.n; // expected-error {{found in multiple}}
}
struct B { int n; }; // expected-note {{ambiguous}}
int k = f<B>(); // expected-note {{here}}
}
namespace dr589 { // dr589: yes
struct B { };
struct D : B { };
D f();
extern const B &b;
bool a;
const B *p = &(a ? f() : b); // expected-error {{temporary}}
const B *q = &(a ? D() : b); // expected-error {{temporary}}
}
namespace dr590 { // dr590: yes
template<typename T> struct A {
struct B {
struct C {
A<T>::B::C f(A<T>::B::C); // ok, no 'typename' required.
};
};
};
template<typename T> typename A<T>::B::C A<T>::B::C::f(A<T>::B::C) {}
}
namespace dr591 { // dr591: no
template<typename T> struct A {
typedef int M;
struct B {
typedef void M;
struct C;
};
};
template<typename T> struct A<T>::B::C : A<T> {
// FIXME: Should find member of non-dependent base class A<T>.
M m; // expected-error {{incomplete type 'dr591::A::B::M' (aka 'void'}}
};
}
// dr592: na
// dr593 needs an IRGen test.
// dr594: na
namespace dr595 { // dr595: dup 1330
template<class T> struct X {
void f() throw(T) {}
#if __cplusplus > 201402L
// expected-error@-2 {{ISO C++17 does not allow}} expected-note@-2 {{use 'noexcept}}
#endif
};
struct S {
X<S> xs;
};
}
// dr597: na
namespace dr598 { // dr598: yes
namespace N {
void f(int);
void f(char);
// Not found by ADL.
void g(void (*)(int));
void h(void (*)(int));
namespace M {
struct S {};
int &h(void (*)(S));
}
void i(M::S);
void i();
}
int &g(void(*)(char));
int &r = g(N::f);
int &s = h(N::f); // expected-error {{undeclared}}
int &t = h(N::i);
}
namespace dr599 { // dr599: partial
typedef int Fn();
struct S { operator void*(); };
struct T { operator Fn*(); };
struct U { operator int*(); operator void*(); }; // expected-note 2{{conversion}}
struct V { operator int*(); operator Fn*(); };
void f(void *p, void (*q)(), S s, T t, U u, V v) {
delete p; // expected-error {{cannot delete}}
delete q; // expected-error {{cannot delete}}
delete s; // expected-error {{cannot delete}}
delete t; // expected-error {{cannot delete}}
// FIXME: This is valid, but is rejected due to a non-conforming GNU
// extension allowing deletion of pointers to void.
delete u; // expected-error {{ambiguous}}
delete v;
}
}