Emily Boudreaux
ec13264050
A bug was discovered in glaze which prevented valid toml output. We have switched to toml++ and reflect-cpp. The interface has remained the same so this should not break any code
103 lines
2.9 KiB
C++
103 lines
2.9 KiB
C++
#ifndef GENERIC_READER_HPP_
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#define GENERIC_READER_HPP_
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#include <cstddef>
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#include <string>
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#include <string_view>
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#include <type_traits>
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#include "../Generic.hpp"
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#include "../Result.hpp"
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#include "../always_false.hpp"
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namespace rfl::generic {
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struct Reader {
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using InputArrayType = Generic::Array;
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using InputObjectType = Generic::Object;
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using InputVarType = Generic;
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template <class T>
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static constexpr bool has_custom_constructor = false;
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rfl::Result<InputVarType> get_field_from_array(
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const size_t _idx, const InputArrayType& _arr) const noexcept {
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if (_idx >= _arr.size()) {
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return error("Index " + std::to_string(_idx) + " of of bounds.");
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}
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return _arr[_idx];
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}
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rfl::Result<InputVarType> get_field_from_object(
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const std::string& _name, const InputObjectType& _obj) const noexcept {
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return _obj.get(_name);
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}
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bool is_empty(const InputVarType& _var) const noexcept {
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return _var.is_null();
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}
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template <class T>
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rfl::Result<T> to_basic_type(const InputVarType& _var) const noexcept {
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if constexpr (std::is_same<std::remove_cvref_t<T>, std::string>()) {
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return _var.to_string();
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} else if constexpr (std::is_same<std::remove_cvref_t<T>, bool>()) {
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return _var.to_bool();
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} else if constexpr (std::is_floating_point<std::remove_cvref_t<T>>()) {
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return _var.to_double().transform(
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[](const auto& _v) { return static_cast<T>(_v); });
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} else if constexpr (std::is_integral<std::remove_cvref_t<T>>()) {
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if constexpr (sizeof(T) > sizeof(int)) {
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return _var.to_int64().transform(
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[](const auto& _v) { return static_cast<T>(_v); });
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} else {
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return _var.to_int().transform(
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[](const auto& _v) { return static_cast<T>(_v); });
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}
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} else {
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static_assert(rfl::always_false_v<T>, "Unsupported type.");
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}
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}
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template <class ArrayReader>
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std::optional<Error> read_array(const ArrayReader& _array_reader,
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const InputArrayType& _arr) const noexcept {
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for (const auto& v : _arr) {
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const auto err = _array_reader.read(InputVarType(v));
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if (err) {
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return err;
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}
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}
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return std::nullopt;
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}
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template <class ObjectReader>
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std::optional<Error> read_object(const ObjectReader& _object_reader,
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const InputObjectType& _obj) const noexcept {
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for (const auto& [k, v] : _obj) {
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_object_reader.read(std::string_view(k), v);
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}
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return std::nullopt;
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}
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rfl::Result<InputArrayType> to_array(
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const InputVarType& _var) const noexcept {
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return _var.to_array();
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}
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rfl::Result<InputObjectType> to_object(
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const InputVarType& _var) const noexcept {
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return _var.to_object();
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}
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template <class T>
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rfl::Result<T> use_custom_constructor(
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const InputVarType /*_var*/) const noexcept {
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return error("Not supported for generic types");
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}
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};
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} // namespace rfl::generic
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#endif
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