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LWG Issue 2247: Implement type trait 'is_null_pointer'

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@192049 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Marshall Clow 2013-10-05 21:21:17 +00:00
parent 320c80fecf
commit 79d8c99a62
15 changed files with 98 additions and 1 deletions
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8
include/type_traits
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@ -28,6 +28,7 @@ namespace std
// Primary classification traits:
template <class T> struct is_void;
template <class T> struct is_null_pointer; // C++14
template <class T> struct is_integral;
template <class T> struct is_floating_point;
template <class T> struct is_array;
@ -298,6 +299,11 @@ template <> struct ____is_nullptr_t<nullptr_t> : public true_type {};
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY __is_nullptr_t
: public ____is_nullptr_t<typename remove_cv<_Tp>::type> {};
#if _LIBCPP_STD_VER > 11
template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_null_pointer
: public ____is_nullptr_t<typename remove_cv<_Tp>::type> {};
#endif
// is_integral
template <class _Tp> struct __is_integral : public false_type {};
@ -422,7 +428,7 @@ template <class _Tp, bool = is_class<_Tp>::value ||
is_union<_Tp>::value ||
is_void<_Tp>::value ||
is_reference<_Tp>::value ||
is_same<_Tp, nullptr_t>::value >
__is_nullptr_t<_Tp>::value >
struct __is_function
: public integral_constant<bool, sizeof(__is_function_imp::__test<_Tp>(__is_function_imp::__source<_Tp>())) == 1>
{};

3
test/utilities/meta/meta.unary/meta.unary.cat/array.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_array_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert( std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/class.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_class_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/enum.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_enum_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/floating_point.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_floating_point_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert( std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/function.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_function_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/integral.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_integral_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert( std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/lvalue_ref.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_lvalue_ref()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/member_function_pointer.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_member_function_pointer_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/member_object_pointer.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_member_object_pointer_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

52
test/utilities/meta/meta.unary/meta.unary.cat/nullptr.pass.cpp Normal file
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@ -0,0 +1,52 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// type_traits
// nullptr_t
// is_null_pointer
#include <type_traits>
#if _LIBCPP_STD_VER > 11
template <class T>
void test_nullptr_imp()
{
static_assert(!std::is_void<T>::value, "");
static_assert( std::is_null_pointer<T>::value, "");
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");
static_assert(!std::is_pointer<T>::value, "");
static_assert(!std::is_lvalue_reference<T>::value, "");
static_assert(!std::is_rvalue_reference<T>::value, "");
static_assert(!std::is_member_object_pointer<T>::value, "");
static_assert(!std::is_member_function_pointer<T>::value, "");
static_assert(!std::is_enum<T>::value, "");
static_assert(!std::is_union<T>::value, "");
static_assert(!std::is_class<T>::value, "");
static_assert(!std::is_function<T>::value, "");
}
template <class T>
void test_nullptr()
{
test_nullptr_imp<T>();
test_nullptr_imp<const T>();
test_nullptr_imp<volatile T>();
test_nullptr_imp<const volatile T>();
}
int main()
{
test_nullptr<std::nullptr_t>();
}
#else
int main() {}
#endif

3
test/utilities/meta/meta.unary/meta.unary.cat/pointer.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_pointer_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/rvalue_ref.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_rvalue_ref()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/union.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_union_imp()
{
static_assert(!std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");

3
test/utilities/meta/meta.unary/meta.unary.cat/void.pass.cpp
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@ -17,6 +17,9 @@ template <class T>
void test_void_imp()
{
static_assert( std::is_void<T>::value, "");
#if _LIBCPP_STD_VER > 11
static_assert(!std::is_null_pointer<T>::value, "");
#endif
static_assert(!std::is_integral<T>::value, "");
static_assert(!std::is_floating_point<T>::value, "");
static_assert(!std::is_array<T>::value, "");