GNU string deep copy

[stuartd]

Hi,

I am using GNU c++ string class. I have been copying strings in my code :

stringA = stringB;

This seems to do a shallow copy, as the address of the contents of the strings are the same.

How do I do a deep string copy?


Thanks.

 

[Themuppeteer]

Well,you could overload the '=' operator to make you a deep copy. I find it strange the class doesn't do it for you... Greetz,

The Muppeteer.

themuppeteer@hotmail.com

http://www.themuppeteer.tk

Don't eat yellow snow...

 

[jstreich]

Actually, if the = is already overloaded he couldn't re overload it... he'd have to re-compile the string class with a new = operator.

What system, version of g++ and is it a call to the operator or the copy constructor?

operator=:
string A = "something";
string B;
B = A;

Copy constructor:
string A = "somehing";
string B = A;

You could always use a string stream, or the copy/copy_back STL functions (either from the class, or from the algorithum library [with iterators]), but I think you should just be able to find a fixed version of the string library for your system. Just some thoughts.

 

[Themuppeteer]

Of course you can't overload it again, but if it was already overloaded,I think the least it could do is make a deep copy (basic functionality), so I presumed it wasn't overloaded yet.
I think it uses the copy constructor...
Greetz,

The Muppeteer.

themuppeteer@hotmail.com

http://www.themuppeteer.tk

Don't eat yellow snow...