Got it now ;)#include<iostream>#include<boost/tokenizer.hpp>#include<string>void { string s = {main()usingnamespacestd;usingnamespaceboost;"LDNTOK";if(s.size() > 3)// insert comma by every 3 charssize_t len = s.size(); { s.insert( i, 1, } tokenizer<escaped_list_separator< { cout << *beg << std::endl;for( size_t i = ((len-1)%3) + 1; i < len; i+=4, ++len )',');char> > tok(s);for(tokenizer<escaped_list_separator<char> >::iterator beg=tok.begin(); beg!=tok.end();++beg)// load holiday calendar *beg} }// else just load holiday calendar} ----- Original Message ---- From: Lars Schouw <schouwla@yahoo.com> To: boost@lists.boost.org Sent: Wednesday, May 28, 2008 10:20:24 PM Subject: tokenizer Can I use the tokenizer to seperate my command and every 3 chars? I have a string A) XXXYYY B) XXX,YYY Can I use the tokenizer to seperate these? I want to to check for strings of type A and then B. Here is some code that does B but what about A before? #include<iostream>#include<boost/tokenizer.hpp>#include <string>void { string s1 = string s = tokenizer<escaped_list_separator< cout << *beg << } }main()usingnamespacestd;usingnamespaceboost;"LDNTOK";"XXX,YYY";char> > tok(s);for(tokenizer<escaped_list_separator<char> >::iterator beg=tok.begin(); beg!=tok.end();++beg){"\n"; Cheers. Lars