Re: [boost] Review: Regular Expression Library

From: Beman Dawes (beman_at_[hidden])
Date: 2000-08-21 12:06:20

Jens Maurer wrote:

 >...
 >
 >Interface
 >---------
 >
 > - regbase::flag_type is a bitmask type, but it does not define
 >the appropriate operators | & etc.  regbase::flags() returns the
 >wrong type.  For example, this code fails:
 >
 >        using boost::regbase;
 >        regbase::flag_type f = regbase::use_except | 
regbase::newline_alt;
 >
 >Look at iostream's flags how to do it correctly.

It is written up in the standard's library front matter.  See 17.3.2.1.2 
Bitmask types [lib.bitmask.types].

It might be nice for boost/operators.hpp to support this idiom, but I don't 
see how to do that in a way that provides the non-member functions when 
desired, but only if explicitly requested.

--Beman