std::experimental::in_place_t
< cpp | experimental | optional
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Defined in header
<experimental/optional> |
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struct in_place_t {};
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(library fundamentals TS) | |
std::experimental::in_place_t is an empty class type used to disambiguate the overloads of constructors and member functions of that take arguments (possibly a parameter pack) for in-place construction of some value.
See also
| in-place construction tag (class template) |
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(C++17)
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a wrapper that may or may not hold an object (class template) |