[boost] Re: Re: Regex group substitution in 1.3

From: Edward Diener (eddielee_at_[hidden])
Date: 2003-05-05 21:18:57

Thaddeus L. Olczyk wrote:
> On Mon, 05 May 2003 18:47:15 -0400, Edward Diener
> <eddielee_at_[hidden]> wrote:
>
>> Use regex_grep to find matches and then regex_format in the Predicate
>> function to change each match to another value.
>>
> Excuse me, but I see no place in the documentation where it describes
> a format string which says something like " take all of the string
> sans subexpression and set the subexpressions to xxxx".
>
> Without that type of format string I do not see any way that
> regex_format can do that.

OK, I see now what you are trying to do. What about running a second
regex_grep, after finding your initial match for the entire string in which
you are searching, in which your regex string is:

"\\$NAME|\\$ADDRESS|\\$EMAIL"

Then when a match is found in your regex_grep, use regex_format to change to
the appropriate substitution by testing, in the regex_grep predicate
function, for which one of the matches has been found.

>
>> Thaddeus L. Olczyk wrote:
>>> I've been searching the documentation for way to do regular
>>> expression substitition of groups.
>>>
>>> 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.
>>
>>
>>
>> _______________________________________________
>> Unsubscribe & other changes:
>> http://lists.boost.org/mailman/listinfo.cgi/boost
>
> Thaddeus L. Olczyk
> -----------------------
> Think twice, code once.
> _______________________________________________
> Unsubscribe & other changes:
> http://lists.boost.org/mailman/listinfo.cgi/boost