some doc updates

[wxWidgets.git] / docs / latex / wx / tstring.tex

diff --git a/docs/latex/wx/tstring.tex b/docs/latex/wx/tstring.tex
index 58b7dde1360ce57537702ce806c7d2e47527c96b..fa25faee5eec8c7233b863345c4d4c0868d18f96 100644 (file)
--- a/docs/latex/wx/tstring.tex
+++ b/docs/latex/wx/tstring.tex
@@ -2,7 +2,7 @@
 
 Classes: \helpref{wxString}{wxstring}, \helpref{wxArrayString}{wxarraystring}, \helpref{wxStringTokenizer}{wxstringtokenizer}
 
-\subsection{Introduction}
+\subsection{Introduction}\label{introductiontowxstring}
 
 wxString is a class which represents a character string of arbitrary length (limited by 
 {\it MAX\_INT} which is usually 2147483647 on 32 bit machines) and containing
@@ -22,7 +22,7 @@ replacing and both C-like \helpref{Printf()}{wxstringprintf} and stream-like
 insertion functions as well as much more - see \helpref{wxString}{wxstring} 
 for a list of all functions.
 
-\subsection{Comparison of wxString to other string classes}
+\subsection{Comparison of wxString to other string classes}\label{otherstringclasses}
 
 The advantages of using a special string class instead of working directly with
 C strings are so obvious that there is a huge number of such classes available.
@@ -131,7 +131,7 @@ strings inside the function faster because of
 strings should return {\it wxString} - this makes it safe to return local
 variables.
 
-\subsection{Other string related functions and classes}
+\subsection{Other string related functions and classes}\label{relatedtostring}
 
 As most programs use character strings, the standard C library provides quite
 a few functions to work with them. Unfortunately, some of them have rather
@@ -167,20 +167,8 @@ vastly better from a performance point of view than a wxObjectArray of wxStrings
 
 \subsection{Reference counting and why you shouldn't care about it}\label{wxstringrefcount}
 
-wxString objects use a technique known as {\it copy on write} (COW). This means
-that when a string is assigned to another, no copying really takes place: only
-the reference count on the shared string data is incremented and both strings
-share the same data.
-
-But as soon as one of the two (or more) strings is modified, the data has to be
-copied because the changes to one of the strings shouldn't be seen in the
-others. As data copying only happens when the string is written to, this is
-known as COW.
-
-What is important to understand is that all this happens absolutely
-transparently to the class users and that whether a string is shared or not is
-not seen from the outside of the class - in any case, the result of any
-operation on it is the same.
+All considerations for wxObject-derived \helpref{reference counted}{trefcount} objects
+are valid also for wxString, even if it does not derive from wxObject.
 
 Probably the unique case when you might want to think about reference
 counting is when a string character is taken from a string which is not a