Re: [Boost-users] [Range] Single Pass Range functionality

Subject: Re: [Boost-users] [Range] Single Pass Range functionality
From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2009-02-23 04:59:56

Edward Diener skrev:
> In the Boost Range documentation describing the Range concepts for a 
> single pass range it lists in the expression semantics post-condition 
> for boost::begin(a):
> 
> "boost::begin(a) is either dereferenceable or past-the-end. It is 
> past-the-end if and only if boost::distance(a) == 0."
> 
> However the documentation for single pass range does not list 
> boost::distance as a valid expression nor in the reference section is 
> boost::distance listed as a single pass range function.
> 
> Is boost::distance a valid function when applied to a single pass range ?

Yes. boost::distance() is specified in terms of std::distance().

-Thorsten