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Fix some type-traits (is_assignable, etc) dealing with classes that take non-const references as 'right hand side'. Add tests. Fixes PR# 20836

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@218286 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow 2014-09-22 23:58:00 +00:00
parent 6a5a8abe2f
commit d132bf4ef1
6 changed files with 39 additions and 9 deletions
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16
include/type_traits
View File

@ -1523,7 +1523,7 @@ struct is_assignable
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_copy_assignable
: public is_assignable<typename add_lvalue_reference<_Tp>::type,
const typename add_lvalue_reference<_Tp>::type> {};
typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
// is_move_assignable
@ -2637,8 +2637,8 @@ struct _LIBCPP_TYPE_VIS_ONLY is_default_constructible
template <class _Tp>
struct _LIBCPP_TYPE_VIS_ONLY is_copy_constructible
: public is_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type>
{};
: public is_constructible<_Tp,
typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
// is_move_constructible
@ -2842,8 +2842,7 @@ struct is_trivially_assignable<_Tp&, _Tp&&>
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_copy_assignable
: public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type,
const typename add_lvalue_reference<_Tp>::type>
{};
typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
// is_trivially_move_assignable
@ -3034,8 +3033,8 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_default_constructib
// is_nothrow_copy_constructible
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_copy_constructible
: public is_nothrow_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type>
{};
: public is_nothrow_constructible<_Tp,
typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
// is_nothrow_move_constructible
@ -3119,8 +3118,7 @@ struct is_nothrow_assignable<_Tp&, _Tp&&>
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_copy_assignable
: public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type,
const typename add_lvalue_reference<_Tp>::type>
{};
typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
// is_nothrow_move_assignable

6
test/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp
View File

@ -52,6 +52,11 @@ class B
B& operator=(const B&);
};
struct C
{
void operator=(C&); // not const
};
int main()
{
test_is_copy_assignable<int> ();
@ -71,4 +76,5 @@ int main()
test_is_not_copy_assignable<B> ();
#endif
test_is_not_copy_assignable<void> ();
test_is_not_copy_assignable<C> ();
}

7
test/utilities/meta/meta.unary/meta.unary.prop/is_copy_constructible.pass.cpp
View File

@ -58,6 +58,12 @@ class B
B(const B&);
};
struct C
{
C(C&); // not const
void operator=(C&); // not const
};
int main()
{
test_is_copy_constructible<A>();
@ -75,6 +81,7 @@ int main()
test_is_not_copy_constructible<char[]>();
test_is_not_copy_constructible<void>();
test_is_not_copy_constructible<Abstract>();
test_is_not_copy_constructible<C>();
#if __has_feature(cxx_access_control_sfinae)
test_is_not_copy_constructible<B>();
#endif

6
test/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_assignable.pass.cpp
View File

@ -34,6 +34,11 @@ struct B
void operator=(A);
};
struct C
{
void operator=(C&); // not const
};
int main()
{
test_is_nothrow_assignable<int&, int&> ();
@ -46,4 +51,5 @@ int main()
test_is_not_nothrow_assignable<int, int> ();
test_is_not_nothrow_assignable<B, A> ();
test_is_not_nothrow_assignable<A, B> ();
test_is_not_nothrow_assignable<C, C&> ();
}

7
test/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_constructible.pass.cpp
View File

@ -70,6 +70,12 @@ struct A
A(const A&);
};
struct C
{
C(C&); // not const
void operator=(C&); // not const
};
int main()
{
test_is_nothrow_constructible<int> ();
@ -80,4 +86,5 @@ int main()
test_is_not_nothrow_constructible<A, int> ();
test_is_not_nothrow_constructible<A, int, double> ();
test_is_not_nothrow_constructible<A> ();
test_is_not_nothrow_constructible<C> ();
}

6
test/utilities/meta/meta.unary/meta.unary.prop/is_trivially_assignable.pass.cpp
View File

@ -34,6 +34,11 @@ struct B
void operator=(A);
};
struct C
{
void operator=(C&); // not const
};
int main()
{
test_is_trivially_assignable<int&, int&> ();
@ -44,4 +49,5 @@ int main()
test_is_not_trivially_assignable<int, int> ();
test_is_not_trivially_assignable<B, A> ();
test_is_not_trivially_assignable<A, B> ();
test_is_not_trivially_assignable<C&, C&> ();
}