Re: [boost] Regex group substitution in 1.3

From: John Maddock (jm_at_[hidden])
Date: 2003-05-07 05:49:46

> For example: Given the regex;
> "My[ ]+name[ ]+is[ ]+($NAME)[.]+
> I[ ]+live[ ]+at[ ]+($ADDRESS)[.]+
> My[ ]+email[ ]+address[ ]+is[ ]+($EMAIL)"
>
> I search some string for a match, find this:
> "My   name is  $NAME . I live   at    $ADDRESS.
> I am an acountant.  My email address is $EMAIL"
>
> and want to substitute
> "Bob Smith" for $NAME
> "1600 Pensylvania Ave." for $ADDRESS
> "bob_at_[hidden]" for $EMAIL.
>
> I have not been able to find a method that will do this for me.

Try the regex:

"(My[ ]+name[ ]+is[ ]+)($NAME)([.]+I[ ]+live[ ]+at[ ]+)($ADDRESS)([.]+My[ ]+
email[ ]+address[ ]+is[ ]+)($EMAIL)"

And replace with (using regex_merge):

"$1Bob Smith$31600 Pensylvania Ave.$5bob_at_[hidden]"

Alternatively, how about searching for:

($NAME)|($ADDRESS)|($EMAIL)

and replacing with:

(?1Bob Smith)(?231600 Pensylvania Ave.)(?3bob_at_[hidden])

John.