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Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../../cpp/utility/nontype.html below:

template< auto V > struct nontype_t { explicit nontype_t() = default; };

(1) (since C++26)

template< auto V > constexpr std::nontype_t<V> nontype {};

(2) (since C++26)

1) The class template std::nontype_t can be used in the constructor's parameter list to match the intended tag.

2)

The corresponding

std::nontype

instance of

(1)

is a disambiguation argument tag that can be passed to the constructors of

std::function_ref

to indicate that the contained object should be constructed with the value of the constant template parameter

V

[edit] Template parameters [edit] See also

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