[boost] Re: Boost Digest, Vol 622, Issue 5

From: Bruno Martínez (br1_at_[hidden])
Date: 2004-01-25 11:07:20

John Maddock wrote:
> 2) An explicit constructor can catch sloppy code:

> std::string trim(const std::string & s)
> {
> return regex_replace(s, "\\A\\s+|\\s+\\z", ""); // inefficient use of
> non-explicit constructor
> }

> In this case the code can be much more effieciently expressed as:

> std::string trim(const std::string & s)
> {
> static const boost::regex e("\\A\\s+|\\s+\\z");
> return regex_replace(s, e, "");
> }

Is the behaviour of this in a multiple-threaded environment correct?

Bruno

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