Re: [Boost-users] [PropertyTree] Using with std algorithms

Subject: Re: [Boost-users] [PropertyTree] Using with std algorithms
From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2011-05-19 13:00:11

On 19.05.2011, at 10:52, Robert Jones wrote:

> On Thu, May 19, 2011 at 5:24 PM, Sebastian Redl <sebastian.redl_at_[hidden]> 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;

The first argument should be a ptree::path_type (= string_path<char>), not std::string.

Sebastian