Re: [Dev-C++] How would you write a method returning a string ?

[Per W. <pw...@ia...>]

Yes, the stdd:string type is bigger than a pointer, since it contains more
than a pointer. It also contains (at least) a length and a reference
counter.

Assigning one std::string to another does not normally require a copy of
the text data. A normal implementation of std::string uses a
reference-counted buffer for the text data, and a new std::string will
just point to the same text.

/pwm

On Sun, 22 Jul 2007, Hiroyuki Yamada wrote:

> Hi,
>
> I'm wondering how you would write a method returning a string.
>
> In C, we usually return char * which malloced in the function or
> returning char * which is static in the function.
> (We should free the char * in the first case.)
>
> In C++,
> we have std::string, so i'm not sure what to do with it to return string.
>
> What I'm trying to do as following.
>
> 1. use char * as a return value just like C
> 2. use std::string as a return value (copying the string object)
> 3. use std::string reference as one of the arguments (return value is
> bool or something.)
> 4. use std::string reference as a return value
>
> There should be more ways, but I'm not familier with those (teach me
> those please)
> and I don't know what's the best.
> I'm going to use method 2 because
> it's simple and copying string object is not a much cost I think.
> (It's said that string object is 7 times as big as the pointer
> size(4bytes) at the biggest in Effective STL)
>
> Please let me know how you would write to return string.
>
>
> Thanks,
>
> HIroyuki Yamada
>
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