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How to get a link to the std :: tuple element?

You can get the value of the nth element std::tupleusing std::get<n>(tuple). But I need to pass one element of this tuple as a reference to a function.

How to get a link to an item std::tuple?

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3 answers

std::get returns a link (either const or not const), so this works:

void fun(int &a) {
    a = 15;
}

void test() {
    std::tuple<int, char> foo{ 12, 'a' };
    fun(std::get<0>(foo));
}

Demo is here .

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std::get returns a reference to the element at the specified position in the tuple.

http://www.cplusplus.com/reference/tuple/get/

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get , rvalue .

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