std::experimental::optional<T>:: operator->, std::experimental::optional<T>:: operator*

Accesses the contained value.

The behavior is undefined if * this does not contain a value .

Parameters

(none)

Return value

Pointer or reference to the contained value.

Exceptions

Throws nothing.

Notes

This operator does not check whether the optional contains a value. If checked access is needed, value() or value_or() may be used.

Example

#include <experimental/optional>
#include <iostream>
#include <string>
using namespace std::literals;
 
int main()
{
    std::experimental::optional<int> opt1 = 1;
    std::cout << *opt1 << '\n';
 
    std::experimental::optional<std::string> opt2 = "abc"s;
    std::cout << opt2->size() << '\n';
}

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See also