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// RUN: %clang_cc1 -fsyntax-only -verify %s
// C++ [dcl.ref]p5:
// There shall be no references to references, no arrays of
// references, and no pointers to references.
// The crazy formatting in here is to enforce the exact report locations.
typedef int &intref;
typedef intref &intrefref;
template <class T> class RefMem { // expected-warning{{class 'RefMem<int &>' does not declare any constructor to initialize its non-modifiable members}}
T
&
member; // expected-note{{reference member 'member' will never be initialized}}
};
struct RefRef {
int
&
& // expected-error {{declared as a reference to a reference}}
refref0;
intref
&
refref1; // collapses
intrefref
&
refref2; // collapses
RefMem
<
int
&
>
refref3; // collapses expected-note{{in instantiation of template class 'RefMem<int &>' requested here}}
};
template <class T> class PtrMem {
T
* // expected-error {{declared as a pointer to a reference}}
member;
};
struct RefPtr {
typedef
int
&
* // expected-error {{declared as a pointer to a reference}}
intrefptr;
typedef
intref
* // expected-error {{declared as a pointer to a reference}}
intrefptr2;
int
&
* // expected-error {{declared as a pointer to a reference}}
refptr0;
intref
* // expected-error {{declared as a pointer to a reference}}
refptr1;
PtrMem
<
int
&
>
refptr2; // expected-note {{in instantiation}}
};
template <class T> class ArrMem {
T
member
[ // expected-error {{declared as array of references}}
10
];
};
template <class T, unsigned N> class DepArrMem {
T
member
[ // expected-error {{declared as array of references}}
N
];
};
struct RefArr {
typedef
int
&
intrefarr
[ // expected-error {{declared as array of references}}
2
];
typedef
intref
intrefarr
[ // expected-error {{declared as array of references}}
2
];
int
&
refarr0
[ // expected-error {{declared as array of references}}
2
];
intref
refarr1
[ // expected-error {{declared as array of references}}
2
];
ArrMem
<
int
&
>
refarr2; // expected-note {{in instantiation}}
DepArrMem
<
int
&,
10
>
refarr3; // expected-note {{in instantiation}}
};
// The declaration of a reference shall contain an initializer
// (8.5.3) except when the declaration contains an explicit extern
// specifier (7.1.1), is a class member (9.2) declaration within a
// class definition, or is the declaration of a parameter or a
// return type (8.3.5); see 3.1. A reference shall be initialized to
// refer to a valid object or function. [ Note: in particular, a
// null reference cannot exist in a well-defined program, because
// the only way to create such a reference would be to bind it to
// the "object" obtained by dereferencing a null pointer, which
// causes undefined behavior. As described in 9.6, a reference
// cannot be bound directly to a bit-field.
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