What is the difference between nullptr and nullptr_t in C ++?

Question

Which should i use? Any benefits if I use one over the other?

Answer 1

nullptr- constant nullptr_t- its type. Use each of these in contexts where you need a null pointer, or a type of null pointer.

Answer 2

nullptrhas type nullptr_t.

Answer 3

"... ?"

( ), :

nullptr_t - , nullptr

nullptr ⁽¹⁾ nullptr_t, .

++ 11:

2.14.7

• - nullptr. std::nullptr_t.
  [: std::nullptr_t- , , ; , prvalue . . 4.10 4.11. - ]

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^{1) , this nullptr r, const. , decltype(nullptr) const. Visual ++ 2015 MinGW g++ 5.1 const.}

Answer 4

, true ++ bool, nullptr ++ std::nullptr_t.

Answer 5

nullptr - - std::nullptr_t. nullptr ++ , false true.:)

Answer 6

[lex.nullptr]:

:
    nullptr

nullptr. std::nullptr_t. [: std::nullptr_t- , , ; , . . 4.10 4.11. -end note]

Therefore, use nullptrwhen you need a literal pointer, and std::nullptr_tin the context when you need to take this type. The latter, for example, if you create a function or constructor or something that can take nullptras an argument.

Answer 7

If you try this one

cout << typeid(nullptr).name() << endl;

you will see that nullptr is of type std :: nullptr_t.