Fixed compile errors, warnings and other DSMs, and improved comments.

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

diff --git a/docs/latex/wx/regex.tex b/docs/latex/wx/regex.tex
index 19a98ccf718eb1085ee4be5c12b5fe4ce9b04847..17673371912bc700fa6f01913ffeb188a9f838b9 100644 (file)
--- a/docs/latex/wx/regex.tex
+++ b/docs/latex/wx/regex.tex
@@ -51,6 +51,7 @@ No base class
 \wxheading{Data structures}
 
 Flags for regex compilation to be used with \helpref{Compile()}{wxregexcompile}:
+
 \begin{verbatim}
 enum
 {
@@ -79,7 +80,8 @@ enum
 Flags for regex matching to be used with \helpref{Matches()}{wxregexmatches}.
 
 These flags are mainly useful when doing several matches in a long string
-to prevent erroneous matches for \verb|'^'| and \verb|'$'|
+to prevent erroneous matches for \verb|'^'| and {\tt '\$'}:
+
 \begin{verbatim}
 enum
 {
@@ -91,6 +93,31 @@ enum
 }
 \end{verbatim}
 
+\wxheading{Examples}
+
+A bad example of processing some text containing email addresses (the example
+is bad because the real email addresses can have more complicated form than
+{\tt user@host.net}):
+
+\begin{verbatim}
+wxString text;
+...
+wxRegEx reEmail = "([^@]+)@([[:alnum:].-_].)+([[:alnum:]]+)";
+if ( reEmail.Matches(text) )
+{
+    wxString text = reEmail.GetMatch(email);
+    wxString username = reEmail.GetMatch(email, 1);
+    if ( reEmail.GetMatch(email, 3) == "com" ) // .com TLD?
+    {
+        ...
+    }
+}
+
+// or we could do this to hide the email address
+size_t count = reEmail.ReplaceAll(text, "HIDDEN@\\2\\3");
+printf("text now contains %u hidden addresses", count);
+\end{verbatim}
+
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxRegEx::wxRegEx}\label{wxregexwxregex}
@@ -116,7 +143,7 @@ dtor not virtual, don't derive from this class
 
 \func{bool}{Compile}{\param{const wxString\& }{pattern}, \param{int }{flags = wxRE\_DEFAULT}}
 
-Compile the string into regular expression, return {\tt TRUE} if ok or {\tt FALSE}
+Compile the string into regular expression, return {\tt TRUE} if ok or {\tt FALSE} 
 if string has a syntax error.
 
 \membersection{wxRegEx::IsValid}\label{wxregexisvalid}
@@ -168,9 +195,9 @@ Replaces the current regular expression in the string pointed to by
 {\it text}, with the text in {\it replacement} and return number of matches
 replaced (maybe $0$ if none found) or $-1$ on error.
 
-The replacement text may contain back references {\tt \\number} which will be
+The replacement text may contain back references {\tt $\backslash$number} which will be
 replaced with the value of the corresponding subexpression in the
-pattern match. {\tt \\0} corresponds to the entire match and {\tt \&} is a
+pattern match. {\tt $\backslash$0} corresponds to the entire match and {\tt \&} is a
 synonym for it. Backslash may be used to quote itself or {\tt \&} character.
 
 {\it maxMatches} may be used to limit the number of replacements made, setting