[Boost-users] [range] discrepancy between size and vector ::size

Subject: [Boost-users] [range] discrepancy between size and vector ::size
From: giecrilj_at_[hidden]
Date: 2011-12-06 15:40:55

The following code gives me a warning:

void trigger (::std ::vector < int > const &v) 
{ ::boost ::size (v) == v. size (); }

and the warning is "signed and unsigned in comparison".

I understand that (size == end - begin) 
and that the latter expression is a difference; 
however, isn't the difference guaranteed to be positive?

Also note that no range function ever uses range_size ::type.
I suggest that ::boost ::size should return range_size ::type.

Chris