Assignment of a temporary object vs. move assignment

Asked Mar 25 '19 at 18:16

Active Mar 25 '19 at 18:18

Viewed 85 times

Clang-tidy gives me a hint when I trying to use move assignment for a temporary object:

Moving a temporary object prevents copy elision

How it works? It's something like RVO?

Example:

class address {
public:
    // CST
    address(address&&) noexcept;

public:
    static address make_address(...);
};

const auto next_address = std::move(
                          ^ Hint point to this expression
    address::make_address(...));

edited Mar 25 '19 at 18:18

asked Mar 25 '19 at 18:16

0xFACE1ECC

A function's return value is already an rvalue expression. The purpose of `std::move` is to "convert" an expression to an rvalue. So it adds nothing here. – François Andrieux Mar 25 '19 at 18:18
@lubgr, yes, thanks for the tip! I think this is the one. – 0xFACE1ECC Mar 25 '19 at 18:22

Assignment of a temporary object vs. move assignment

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