Re: [Boost-users] regex_replace with file streams

From: louis (louis04_at_[hidden])
Date: 2005-08-23 11:45:13

Thanks for the help.

My platform is Win32 and I was able to create a class:

class mystring: public std::iterator<std::bidirectional_iterator_tag, char >

mystring class opens the input file and maps it into memory using:
CreateFileMapping
MapViewOfFile

and I pass this into regex_replace. It seems to work - any thoughts?

Thanks again
Louis

> -----Original Message-----
> From: boost-users-bounces_at_[hidden]
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of John Maddock
> Sent: Tuesday, August 23, 2005 11:08 AM
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] regex_replace with file streams
> 
>>I want to use regex_replace to operate on a potentially large input 
>>file and output the results to another file. So, I can't load the 
>>entire file into a buffer in memory and pass it in as is done in the 
>>examples. I can't seem to figure out how to pass fstream or some other 
>>file I/O into regex_replace (ie create the proper iterator).
> 
> Take a look at the second example in
> http://www.boost.org/libs/regex/doc/partial_matches.html
> 
> Unfortunately if you want to do a search and replace in an "infinite" text,
> then you're not going to be able to use regex_replace.  Instead you'll have
> to enumerate through the matches and copy unmatched sections to output, and
> then call match_results::format on matched sections to get the text to
> output for that section.
> 
> HTH, John.
> 
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