On Thu, May 19, 2011 at 5:24 PM, Sebastian Redl <sebastian.redl@getdesigned.at> wrote:

On 19.05.2011, at 08:56, Robert Jones wrote:

Hi All

Is it possible and practical to use the put and get methods of Boost.PropertyTree with std
algorithms?

I've written this snippet, which doesn't compile, which I think is because I have not correctly
expressed the return type of "put()". Is it possible to do this?

Yes, the put() overloads all return the affected tree node.

    for_each( boost::begin( v ), boost::end( v ),
            bind( static_cast<void (ptree::*)( const std::string &, unsigned )>( & ptree::put ), boost::ref( tree ), "Values.value", _1 ) );

Try this:
static_cast<ptree& (ptree::*)(...)> 

Hi Sebstian

Thanks for that, I thought that should work too, but seems there's still an overload problem!

#include <algorithm>
#include <vector>
#include <boost/range.hpp>
#include <boost/bind.hpp>
#include <boost/property_tree/ptree.hpp>

int main( )
{
    using boost::property_tree::ptree;

    std::vector<unsigned> v;
    ptree tree;

    ptree & ( ptree::*myput )( const std::string &, unsigned ) = & ptree::put;

    for_each( boost::begin( v ), boost::end( v ),
            bind( myput, boost::ref( tree ), "Values.value", _1 ) );
}

> g++ ptree.cpp

ptree.cpp: In function ‘int main()’:
ptree.cpp:14: error: no matches converting function ‘put’ to type ‘struct boost::property_tree::ptree& (struct boost::property_tree::basic_ptree<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::*)(const struct std::string&, unsigned int)’
/usr/include/boost/property_tree/ptree.hpp:446: error: candidates are: template<class Type, class Translator> boost::property_tree::basic_ptree<K, D, C>& boost::property_tree::basic_ptree::put(const typename boost::property_tree::path_of<Key>::type&, const Type&, Translator) [with Type = Type, Translator = Translator, Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Data = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, KeyCompare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >]
/usr/include/boost/property_tree/ptree.hpp:455: error:                 template<class Type> boost::property_tree::basic_ptree<K, D, C>& boost::property_tree::basic_ptree::put(const typename boost::property_tree::path_of<Key>::type&, const Type&) [with Type = Type, Key = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Data = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, KeyCompare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >]

Any ideas?

Thx

- Rob.