Re: [Boost-users] Any function in boost::regex to escape everything of a text

From: llwaeva_at_[hidden]
Date: 2007-03-13 21:50:52

> hi there, 
> I am working with a pattern-replace job with boost:regex. For 
> convenience, I use replace_all_regex to do that. Here is my code 
> 
> replace_all_regex( TEXT_TO_BE_REPLACED, regex_exp, format_string, 
> format_all ); 
> 
> TEXT_TO_BE_REPLACED is a text containing some patterns like %a, %b 
> and %c which will be repalced with a specific string(format_string) 
> that is inputed by user. However, the input string (format_string) 
> may have some characters related to the regular expression, such 
> characters must be escaped before the substitution. The following 
> > code is for that purpose 
> > 
> > replace_all( input, "$", "$$" ); 
> > replace_all( input, "\\", "\\\\" ); 
> > replace_all( input, ":", "\\:" ); 
> > replace_all( input, "?", "\\?" ); 
>> > replace_all( input, "(", "\\(" ); 
> > replace_all( input, ")", "\\)" ); 
> > 
> > The substitution works fine sometimes and fails when the input string 
> > (format_string) contains character which is not escaped. I just 
> > wonder if there is any function defined in boost::regex to escape all 
> > SPECIAL characters. 

> Use "format_literal" rather than "format_all" and all the characters in the 
> format string will be output "as is", and none will be treated as special 
> characters. 

> John. 

I try format_literal, but it reports error while compiling "error C2065:
'format_literal' : undeclared identifier"  

I am using the latest version of boost. Microsoft Visual Studio 2005, XP