How exactly does rvalue-referencing increase efficiency of a code memory-wise?

Question

C / C++

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How exactly does rvalue-referencing increase efficiency of a code memory-wise?

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14.12.2020

14 ответов

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🖖 Автор вопроса

Amir
there are some CppCon videos about this on youtube

meaning you don’t know?

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14.12.2020

Amir

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meaning you don’t know?

means there are a lot to explain

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14.12.2020

🖖 Автор вопроса

Amir
means there are a lot to explain

Oh ok 👌

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14.12.2020

Amir

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Oh ok 👌

one example can be this std::vector<largeObject> fun(); auto x = fun(); would you like to move the object or copy it ?

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14.12.2020

🖖 Автор вопроса

Amir
one example can be this std::vector<largeObject>...

Yeah But what exactly does moving do that contribute to the efficient memory-use in the operation

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14.12.2020

Amir

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Yeah But what exactly does moving do that contribu...

are you familiar with lifetime of objects ?

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14.12.2020

🖖 Автор вопроса

Amir
are you familiar with lifetime of objects ?

Yeah

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14.12.2020

Amir

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Yeah

so you should know that data in the vector most of time is stored on the heap

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14.12.2020

🖖 Автор вопроса

Amir
so you should know that data in the vector most of...

Yeah, because the vector allocates new memory internally

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14.12.2020

Amir

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Yeah, because the vector allocates new memory inte...

Have you heard of move semantics ?

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14.12.2020

🖖 Автор вопроса

Amir
Have you heard of move semantics ?

Not really What’s that about?

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14.12.2020

Amir

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Not really What’s that about?

it's about passing the ownership

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14.12.2020

Пользователь 61654

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2027.html

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14.12.2020

Amir · Accepted Answer

Amir

there are some CppCon videos about this on youtube

0

14.12.2020

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How exactly does rvalue-referencing increase efficiency of a code memory-wise?

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