Re: [Boost-users] algorithm::string

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-03-21 12:43:03

AMDG

Elisabeth Benoit wrote:
> Can someone please tell me how to use boost::algorithm::is_alnum(). I first
> thought I could do
>
> std::string test
> boost::algorithm::is_alnum(test)
>
> but obviously the function doesn't take a string as a parameter. I've been
> searching for an example in the doc and on the web, but niet.
>
> an example would be greatly appreciated.
>   

is_alnum() returns a unary function object that takes a character.

std::string s("!($(@  U98");
std::cout << std::count_if(s.begin(), s.end(), 
boost::algorithm::is_alnum()); // prints 3

see also 
http://www.boost.org/doc/html/string_algo/reference.html#header.boost.algorithm.string.classification.hpp

In Christ,
Steven Watanabe