Re: [Boost-users] Some trouble with "regex_replace()"

From: John Maddock (john_at_[hidden])
Date: 2004-11-10 06:50:24

> Using "regex_replace(string, pattern, replace_string, flags)" I got some
> unwished results. I can't find out what flag set I have to use, that the
> replacement string was taken, as it is.
> I think this short example should make my problem clear:
> Replace in a string all occurences of PATH through the actual windows 
> directory:
>   "Actual path: 'PATH'"
>   with Path "D:\temp\rest"
>   leads to the string: "Actual Path: 'D:   emp
> est'"
> This show, that "\t" and "\r" was interpreted. For me that is an 
> unexspected
> behaviour, because the replacement is just some string, not more. I 
> understand
> that the pattern will be interpreted and controlled over the flags, but 
> why the
> replacement string? Can somebody explain that behaviour and show me a way 
> out?

You have to double up escapes, and also escape '$'s as well: see the format 
string syntax for a guide, maybe I should add a "format_literal" option as 
well though,

John.