[Boost-users] Any function in boost::regex to escape everything of a text

From: llwaeva_at_[hidden]
Date: 2007-03-13 11:35:41

hi there,
  I am working with a pattern-replace job with boost:regex. For
convenience, I use  replace_all_regex to do that. Here is my code

 replace_all_regex( TEXT_TO_BE_REPLACED, regex_exp, format_string, format_all );

TEXT_TO_BE_REPLACED is a text containing some patterns like %a, %b and %c which will be repalced with a specific
string(format_string) that is inputed by user.  However, the input string (format_string) may have some characters related
to the regular expression, such characters  must be escaped before the substitution.  The following code is for that
purpose

    replace_all( input, "$", "$$" );
    replace_all( input, "\\", "\\\\" );
    replace_all( input, ":", "\\:" );
    replace_all( input, "?", "\\?" );
    replace_all( input, "(", "\\(" );
    replace_all( input, ")", "\\)" );

The substitution works fine sometimes and fails when the input string (format_string) contains character which is not
escaped. I just wonder if there is any function defined in boost::regex to escape all SPECIAL characters.

Thanks in advance.