HI GUYS, can someone explain this warning? i can't undrestand....

Question

C / C++

Caroline

HI GUYS, can someone explain this warning? i can't undrestand....

0

24.08.2021

6 ответов

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Caroline Автор вопроса

Holmes
you just sent an explanation for the warning, what...

the warning is for this code, but i want to know why i get that warning? and should use std::move()

0

24.08.2021

Holmes

Caroline

the warning is for this code, but i want to know w...

the picture you sent explains why you get the warning. you make a copy of the parameter, and then copy it again to firstname. why do you need this double copy? you can either make the parameter a reference, so you won't copy the parameter, or use std::move, so you'll take advantage of the move semantics to "steal" what you can from the parameter instead of copying the whole string twice. personally, in this case I'll make the parameter a reference, there's no reason to use move semantics here.

0

24.08.2021

Caroline Автор вопроса

Holmes
the picture you sent explains why you get the warn...

should i write const string &fname?

0

24.08.2021

Holmes

Caroline
should i write const string &fname?

yes

0

24.08.2021