[Boost-users] Boost Regex - Specify multiple expressions and formats with regex_replace?

From: Jeff (jeff_j_dunlap_at_[hidden])
Date: 2008-03-18 21:11:06

Dear Regex Users:

I'd like to know if it is possible to check multiple expressions and specify 
multiple patters within a single regex_replace statement.  For example, I want 
to replace .html extensions with .php and replace .gif with the .srf extension

Match:        http://localhost/index.gif 
replace with: http://localhost/index.srf

Match:        http://localhost/index.html
replace with: http://localhost/index.php

Can this be done within a single regex_replace statement?  Although this does 
not work, it demonstrates what I am trying to achieve:

// trying to match either condition
const boost::regex sExp("(?:^(.*/)index\.html$) | (?:^(.*/)index\.gif$)");
// trying to replace according to matched extension
const std::string sRewrite("$1index.php");

std::string rewrite(const std::string& s) {
  return boost::regex_replace(s, sExp, sRewrite, boost::match_perl | 
boost::format_perl | boost::format_no_copy | boost::format_all);
}

int main() {
  string s[5] = { "http://localhost/abc.png", 
                  "http://localhost/abc.jpb", 
                  "http://localhost/index.gif", 
                  "http://localhost/hambone.srf", 
                  "http://localhost/index.html" };

  for(int i = 0; i < 5; ++i)
  {
    if (rewrite(s[i])!="")
        {
      cout << rewrite(s[i]) << endl;
        }
  }

  return 0;
}

I don't know if regex_replace can be used to do this or not.

Thank you,

Jeff