draconisplusplus/include/rfl/parsing/Parser_reference_wrapper.hpp
2024-06-08 14:10:59 -04:00

53 lines
1.6 KiB
C++

#ifndef RFL_PARSING_PARSER_REFERENCE_WRAPPER_HPP_
#define RFL_PARSING_PARSER_REFERENCE_WRAPPER_HPP_
#include <functional>
#include <map>
#include <type_traits>
#include "../Result.hpp"
#include "../always_false.hpp"
#include "Parser_base.hpp"
#include "schema/Type.hpp"
namespace rfl {
namespace parsing {
template <class R, class W, class T, class ProcessorsType>
requires AreReaderAndWriter<R, W, std::reference_wrapper<T>>
struct Parser<R, W, std::reference_wrapper<T>, ProcessorsType> {
using InputVarType = typename R::InputVarType;
using OutputVarType = typename W::OutputVarType;
static Result<std::reference_wrapper<T>> read(
const R& _r,
const InputVarType& _var) noexcept {
static_assert(always_false_v<T>,
"Reading into std::reference_wrapper is dangerous and "
"therefore unsupported. "
"Please consider using std::unique_ptr, rfl::Box, "
"std::shared_ptr, or"
"rfl::Ref instead.");
return Error("Unsupported.");
}
template <class P>
static void write(const W& _w,
const std::reference_wrapper<T> _ref,
const P& _p) noexcept {
Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::write(
_w, _ref.get(), _p);
}
static schema::Type to_schema(
std::map<std::string, schema::Type>* _definitions) {
return Parser<R, W, std::remove_cvref_t<T>, ProcessorsType>::to_schema(
_definitions);
}
};
} // namespace parsing
} // namespace rfl
#endif