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Added conditional compilation

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Added conditional compilation.
Changed namespace from etl to std.
This commit is contained in:
jwellbelove 2014-11-01 15:26:34 +00:00
parent 5383373b18
commit bc4335c356
1 changed files with 37 additions and 1 deletions
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38
nullptr.h
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@ -33,7 +33,8 @@ SOFTWARE.
/// A definition of nullptr for compilers that don't support it as standard.
///\ingroup utilities
namespace etl
#if defined(_MSC_VER) && (_MSC_VER < 1600)
namespace std
{
//*****************************************************************************
/// A null pointer type.
@ -70,5 +71,40 @@ namespace etl
const nullptr_t nullptr = {};
}
//*****************************************************************************
/// A null pointer type.
///\ingroup nullptr
//*****************************************************************************
class nullptr_t
{
public:
// Convertible to any type of null non-member pointer.
template<class T>
inline operator T*() const
{
return 0;
}
// Or any type of null member pointer.
template<class C, class T>
inline operator T C::*() const
{
return 0;
}
private:
// Can't take address of nullptr.
void operator&() const;
};
//*****************************************************************************
/// A null pointer.
///\ingroup nullptr
//*****************************************************************************
const nullptr_t nullptr = {};
#endif
#endif