What does "&&" mean infront of C++ variable

Asked Jun 02 '22 at 06:36

Active Jun 02 '22 at 06:36

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I came across this for move constructors in C++. What does MyIntArray &&src mean? Is it similar to passing a reference of a variable to a function argument ?

    // move constructor
    MyIntArray(MyIntArray &&src) {
        // just swap the array pointers...
        src.swap(*this);
    }

asked Jun 02 '22 at 06:36

user19254058

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look up move operator – AndersK Jun 02 '22 at 06:37
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@AndersK `std::move` is a function template, it is not an operator. – Ayxan Haqverdili Jun 02 '22 at 06:44
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Look up "rvalue references" and "move constructor" – Ayxan Haqverdili Jun 02 '22 at 06:44
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https://stackoverflow.com/questions/8424064/what-does-mean-with-a-parameter-type-in-c You should be able to understand now – Gautham Mudaliar Jun 02 '22 at 06:47
Thanks, was assuming it behaved similar to references. Guess it is for R values to prevent the use of temporaries. – user19254058 Jun 02 '22 at 09:35

What does "&&" mean infront of C++ variable

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