cast/assignement operators

[John Doe]

Hi,

I am trying to replace the use of the Windows CString class by a
compatible one (CStdString) using std::string , the problem is I cannot
do the following thing :

A)
CString strFullPath;
CStdString& str = strFullPath;

or this :

B)
CStdString strFolder;
m_treeFolder.GetItemText(hItem, strFolder);
with GetItemText defined like this :
BOOL GetItemText(HTREEITEM hItem, CString& strText) const;


The question is in A) case when I assign a CStdString& with a CString
which operator is called, the assignment one, a cast ?

In B) same question should I declare a cast operator ? an assignement one ?

Final question what should I declare to make A) and B) possible ?

 

[John Doe]

No operator gets called. A reference is, essentially, a pointer. It must
reference, or point, to something.

It can't reference/point to an object of a different class.

Is it true even if CStdString has exactly the same method signatures as
a CString ?

 

[Jim Langston]

Is it true even if CStdString has exactly the same method signatures as a
CString ?

Yes, it is true because CStdString is NOT a CString. They are two different
classes.

But, if you are trying to replace CString with CStdString why do you have
CString in your code anyway? Replace it with CStdString. Although I would
suggest you drop CStdString all together and just go with std::string.

 

[.rhavin grobert]

Having said all this, after going through something similar myself,
converting a bunch of code that used MS's gawdawful CString,

just curious: what's wrong with CString?

 

[John Doe]

just curious: what's wrong with CString?

Have you ever tried to write code on multiplatform ?
Windows, Windows CE, Symbian, iPhone, ...
I think you have you answer.
and the raw std::string is really limited compared to CString that's why
I am using CStdString.