54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
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#ifndef RFL_PARSING_PARSER_RFL_VARIANT_HPP_
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#define RFL_PARSING_PARSER_RFL_VARIANT_HPP_
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#include <map>
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#include <type_traits>
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#include <variant>
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#include "../Result.hpp"
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#include "../Variant.hpp"
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#include "../always_false.hpp"
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#include "FieldVariantParser.hpp"
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#include "Parser_base.hpp"
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#include "schema/Type.hpp"
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namespace rfl {
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namespace parsing {
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template <class R, class W, class... FieldTypes, class ProcessorsType>
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requires AreReaderAndWriter<R, W, rfl::Variant<FieldTypes...>>
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struct Parser<R, W, rfl::Variant<FieldTypes...>, ProcessorsType> {
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using InputVarType = typename R::InputVarType;
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using OutputVarType = typename W::OutputVarType;
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/// Expresses the variables as type T.
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static Result<rfl::Variant<FieldTypes...>> read(
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const R& _r, const InputVarType& _var) noexcept {
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const auto to_rfl_variant = [](auto&& _var) {
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return rfl::Variant<FieldTypes...>(
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std::forward<std::variant<FieldTypes...>>(_var));
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};
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return Parser<R, W, std::variant<FieldTypes...>, ProcessorsType>::read(_r,
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_var)
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.transform(to_rfl_variant);
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}
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template <class P>
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static void write(const W& _w, const rfl::Variant<FieldTypes...>& _variant,
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const P& _parent) noexcept {
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Parser<R, W, std::variant<FieldTypes...>, ProcessorsType>::write(
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_w, _variant.variant(), _parent);
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}
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static schema::Type to_schema(
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std::map<std::string, schema::Type>* _definitions) {
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return Parser<R, W, std::variant<FieldTypes...>, ProcessorsType>::to_schema(
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_definitions);
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}
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};
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} // namespace parsing
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} // namespace rfl
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#endif
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