#pragma once

#include <functional>

namespace pugiext {
    template<typename _T>
    inline bool query_attribute(pugi::xml_node& node, const char* aname, _T* value)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = ds.as_int();
            return true;
        }
        return false;
    }
    template<>
    inline bool query_attribute<float>(pugi::xml_node& node, const char* aname, float* value)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = ds.as_float();
            return true;
        }
        return false;
    }
    template<> 
    inline bool query_attribute<bool>(pugi::xml_node& node, const char* aname, bool* value)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = ds.as_bool();
            return true;
        }
        return false;
    }
    template<>
    inline bool query_attribute<std::string>(pugi::xml_node& node, const char* aname, std::string* value)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = ds.as_string();
            return true;
        }
        return false;
    }
    template<>
    inline bool query_attribute<const char*>(pugi::xml_node& node, const char* aname, const char** value)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = ds.as_string();
            return true;
        }
        return false;
    }
    
    inline bool query_attribute(pugi::xml_node& node, const char* aname, float* value, std::function<float(float)> vconv)
    {
        auto ds = node.attribute(aname);
        if (ds) {
            *value = vconv(ds.as_float());
            return true;
        }
        return false;
    }
}