Hi Oswin 2012/6/22 Oswin Krause :

Hi list,

I'm using boost 1.49 and get an annoying number of signed/unsigned comparison warnings when i use boost::size. Which is because the return type seems to be signed

When I look at boost/range/size.hpp, i get

template<class SinglePassRange>  inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange>::type <--signed size(const SinglePassRange& rng)

But the documentation for random access ranges tells otherwise:

Expression: boost::size(a)

Return Type: boost::range_size<X>::type

and Forward Range defines range_size as:

boost::range_size<X>::type An unsigned integral type that can represent any nonnegative value of the Range's distance type.

assuming the documentation does not lie, I propose the following fix

template<class SinglePassRange> inline BOOST_DEDUCED_TYPENAME range_size<SinglePassRange>::type size(const SinglePassRange& rng)

Greetings, Oswin

This issue was fixed in trunk. Please wait next release (maybe 1.51). Thanks, Akira == Akira Takahashi faithandbrave@gmail.com site: https://sites.google.com/site/faithandbrave/about/en