xml_attribute_ref.h

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/*  Copyright (c) SILVERCODERS Ltd, http://silvercoders.com                                                                                  */
/*  Project homepage: https://github.com/docwire/docwire                                                                                     */
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#ifndef DOCWIRE_XML_ATTRIBUTE_REF_H
#define DOCWIRE_XML_ATTRIBUTE_REF_H
 
#include "safety_policy.h"
#include "xml_reader.h"
#include <functional>
#include <string_view>
#include <optional>
#include "convert_base.h"
 
namespace docwire::xml
{
 
template <safety_policy safety_level = default_safety_level>
class attribute_ref
{
 public:
  explicit attribute_ref(const reader<safety_level>& reader) : m_reader(reader) {}
  std::string_view name() const { return m_reader.get().name(); }
  std::string_view value() const { return m_reader.get().content(); }
 
 private:
    std::reference_wrapper<const reader<safety_level>> m_reader;
};
 
template<typename T, safety_policy safety_level>
requires convert::conversion_implementation_exists<T, std::string_view>
std::optional<T> convert_impl(const attribute_ref<safety_level>& attr, convert::dest_type_tag<T>) noexcept
{
    return convert::try_to<T>(attr.value());
}
 
}
 
#endif // DOCWIRE_XML_ATTRIBUTE_REF_H