Re: [boost] Regex problem with whitespace

From: John Maddock (john_at_[hidden])
Date: 2003-12-31 06:53:37

> When I rebuild the inspect program yesterday (using VC++ 7.1), it started
> to incorrectly report some files as unlinked even though they really are
> linked.
>
> Here is an example of one of the missed links:
>
>      <td><a href=
>      "../tools/build/v1/borland-tools.html"><code>borland</code></a></td>
>
> A dump of the file shows the line endings are cr/nl.
>
> The regex that used to find this OK is:
>
>    boost::regex url_regex(
>      "<\\s*"
>      "(?:A\\s+[^>]*HREF|FRAME\\s+SRC)" // A HREF or FRAME SRC
>      "\\s*=\\s*\"([^\"]*)\"",
>      boost::regbase::normal | boost::regbase::icase);
>
> Any ideas?

There haven't been any regex changes that would affect that in a long while,
and as the test program below demonstrates it does find the match you expect
in this case, so the error must be somewhere else,

John.

#include "boost/regex.hpp"

#include <iostream>

int main()

{

std::string s = "<td><a href=\r\n
\"../tools/build/v1/borland-tools.html\"><code>borland</code></a></td>";

boost::regex url_regex(

"<\\s*"

"(?:A\\s+[^>]*HREF|FRAME\\s+SRC)" // A HREF or FRAME SRC

"\\s*=\\s*\"([^\"]*)\"",

boost::regbase::normal | boost::regbase::icase);

boost::smatch what;

if(regex_search(s, what, url_regex))

{

std::cout << "match found: " << what[1] << std::endl;

}

else

{

std::cout << "Ooops!" << std::endl;

}

return 0;

}