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// RUN: %check_clang_tidy %s bugprone-forward-declaration-namespace %t
namespace {
// This is a declaration in a wrong namespace.
class T_A;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'T_A' is never referenced, but a declaration with the same name found in another namespace 'na' [bugprone-forward-declaration-namespace]
// CHECK-NOTES: note: a declaration of 'T_A' is found here
// CHECK-NOTES: :[[@LINE-3]]:7: warning: no definition found for 'T_A', but a definition with the same name 'T_A' found in another namespace '(global)' [bugprone-forward-declaration-namespace]
// CHECK-NOTES: note: a definition of 'T_A' is found here
}
namespace na {
// This is a declaration in a wrong namespace.
class T_A;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'T_A' is never referenced, but a declaration with the same name found in another namespace '(anonymous)'
// CHECK-NOTES: note: a declaration of 'T_A' is found here
// CHECK-NOTES: :[[@LINE-3]]:7: warning: no definition found for 'T_A', but a definition with the same name 'T_A' found in another namespace '(global)'
// CHECK-NOTES: note: a definition of 'T_A' is found here
}
class T_A;
class T_A {
int x;
};
class NESTED;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: no definition found for 'NESTED', but a definition with the same name 'NESTED' found in another namespace '(anonymous namespace)::nq::(anonymous)'
// CHECK-NOTES: note: a definition of 'NESTED' is found here
namespace {
namespace nq {
namespace {
class NESTED {};
}
}
}
namespace na {
class T_B;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'T_B' is never referenced, but a declaration with the same name found in another namespace 'nb'
// CHECK-NOTES: note: a declaration of 'T_B' is found here
// CHECK-NOTES: :[[@LINE-3]]:7: warning: no definition found for 'T_B', but a definition with the same name 'T_B' found in another namespace 'nb'
// CHECK-NOTES: note: a definition of 'T_B' is found here
}
namespace nb {
class T_B;
}
namespace nb {
class T_B {
int x;
};
}
namespace na {
class T_B;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'T_B' is never referenced, but a declaration with the same name found in another namespace 'nb'
// CHECK-NOTES: note: a declaration of 'T_B' is found here
// CHECK-NOTES: :[[@LINE-3]]:7: warning: no definition found for 'T_B', but a definition with the same name 'T_B' found in another namespace 'nb'
// CHECK-NOTES: note: a definition of 'T_B' is found here
}
// A simple forward declaration. Although it is never used, but no declaration
// with the same name is found in other namespace.
class OUTSIDER;
namespace na {
// This class is referenced declaration, we don't generate warning.
class OUTSIDER_1;
}
void f(na::OUTSIDER_1);
namespace nc {
// This class is referenced as friend in OOP.
class OUTSIDER_1;
class OOP {
friend struct OUTSIDER_1;
};
}
namespace nd {
class OUTSIDER_1;
void f(OUTSIDER_1 *);
}
namespace nb {
class OUTSIDER_1;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'OUTSIDER_1' is never referenced, but a declaration with the same name found in another namespace 'na'
// CHECK-NOTES: note: a declaration of 'OUTSIDER_1' is found here
}
namespace na {
template<typename T>
class T_C;
}
namespace nb {
// FIXME: this is an error, but we don't consider template class declaration
// now.
template<typename T>
class T_C;
}
namespace na {
template<typename T>
class T_C {
int x;
};
}
namespace na {
template <typename T>
class T_TEMP {
template <typename _Tp1>
struct rebind { typedef T_TEMP<_Tp1> other; };
};
// We ignore class template specialization.
template class T_TEMP<char>;
}
namespace nb {
template <typename T>
class T_TEMP_1 {
template <typename _Tp1>
struct rebind { typedef T_TEMP_1<_Tp1> other; };
};
// We ignore class template specialization.
extern template class T_TEMP_1<char>;
}
namespace nd {
class D;
// CHECK-NOTES: :[[@LINE-1]]:7: warning: declaration 'D' is never referenced, but a declaration with the same name found in another namespace 'nd::ne'
// CHECK-NOTES: note: a declaration of 'D' is found here
}
namespace nd {
namespace ne {
class D;
}
}
int f(nd::ne::D &d);
// This should be ignored by the check.
template <typename... Args>
class Observer {
class Impl;
};
template <typename... Args>
class Observer<Args...>::Impl {
};
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