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deductiongu...td::optional(3) C++ Standard Libarydeductiongu...td::optional(3)

NAME
       deductionguidesforstd::optional - deductionguidesforstd::optional

Synopsis
	  Defined in header <optional>
	  template<class T>		(since C++17)
	  optional(T) -> optional<T>;

	  One deduction	guide is provided for std::optional to account for the
       edge cases
	  missed by the	implicit deduction guides, in particular, non-copyable
       arguments and
	  array	to pointer conversion

Example
       // Run this code

	#include <optional>

	int main()
	{
	    int	a[2];
	    std::optional  oa{a};  // explicit deduction guide is used in this
       case
	}

http://cppreference.com		  2022.07.31	 deductiongu...td::optional(3)

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