p≡p JSON adapter
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

39 lines
1.0 KiB

// some helper functions to deal with JSON data
#ifndef PEP_UTILS_JSON_HH
#define PEP_UTILS_JSON_HH
#include "json_spirit/json_spirit_utils.h"
namespace pEp {
namespace utility {
// fetch a member from the given object, if set. (return a sensible NULL/default value if not)
template<class T, js::Value_type VALUE_TYPE>
T from_json_object(const js::Object& obj, const std::string& key)
{
const auto v = find_value(obj, key);
if(v.type() == js::null_type) return T{};
if(v.type() == VALUE_TYPE) return from_json<T>(v);
throw std::runtime_error("JSON object has a member for key \"" + key + "\""
" with incompatible type " + js::value_type_to_string( v.type())
+ " instead of expected type " + js::value_type_to_string(VALUE_TYPE)
);
}
template<class T>
void to_json_object(js::Object& obj, const std::string& key, const T& value)
{
if(value!=T{})
{
obj.emplace_back( key, js::Value( to_json<T>(value) ));
}
}
} // end of namespace pEp::utility
} // end of namespace pEp
#endif // PEP_UTILS_JSON_HH