Hi, I like to break a file into tokens for processing. The file contains comments which are introduced by "//", "#" and ";". Can I setup the tokenizer directly such that the comments are skipped? If no, what would you suggest to erase the comments from my string before processing? Here is what I do right now: // CODE ifstream is( "file.txt" ); string file, line; file.reserve( 2 * 1024 * 1024 ); while ( getline( is, line ) ) { TrimHead( line ); if ( line[0] != '/' && line[1] != '/' ) file.append( line + "\n" ); // Need to append "\n" again to get the right tokens - not very nice } typedef tokenizer<char_separator<char> > Tokenizer; char_separator<char> sep(" \t\n"); Tokenizer tokens( file, sep ); // END CODE Another idea was to the following: // CODE ifstream is( "file.txt" ); string line( ( istreambuf_iterator<char>( is ) ), istreambuf_iterator<char>() ); EraseComments( line ); // END CODE Any help is appreciated. -Dirk