125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
#ifndef RFL_TOML_WRITER_HPP_
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#define RFL_TOML_WRITER_HPP_
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#include <exception>
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#include <map>
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#include <sstream>
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#include <stdexcept>
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#include <string>
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#include <string_view>
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#include <toml++/toml.hpp>
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#include <type_traits>
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#include <vector>
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#include "../Ref.hpp"
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#include "../Result.hpp"
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#include "../always_false.hpp"
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namespace rfl::toml {
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class Writer {
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public:
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struct TOMLArray {
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::toml::array* val_;
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};
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struct TOMLObject {
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::toml::table* val_;
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};
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struct TOMLVar {};
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using OutputArrayType = TOMLArray;
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using OutputObjectType = TOMLObject;
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using OutputVarType = TOMLVar;
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Writer(::toml::table* _root) : root_(_root) {}
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~Writer() = default;
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template <class T>
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OutputArrayType array_as_root(const T _size) const noexcept {
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static_assert(rfl::always_false_v<T>,
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"TOML only allows tables as the root element.");
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return OutputArrayType{nullptr};
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}
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OutputObjectType object_as_root(const size_t _size) const noexcept {
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return OutputObjectType{root_};
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}
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OutputVarType null_as_root() const noexcept { return OutputVarType{}; }
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template <class T>
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OutputVarType value_as_root(const T& _var) const noexcept {
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static_assert(rfl::always_false_v<T>,
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"TOML only allows tables as the root element.");
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return OutputVarType{};
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}
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OutputArrayType add_array_to_array(const size_t _size,
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OutputArrayType* _parent) const noexcept {
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const auto i = _parent->val_->size();
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_parent->val_->push_back(::toml::array());
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return OutputArrayType{_parent->val_->at(i).as_array()};
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}
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OutputArrayType add_array_to_object(
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const std::string_view& _name, const size_t _size,
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OutputObjectType* _parent) const noexcept {
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_parent->val_->emplace(_name, ::toml::array());
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return OutputArrayType{_parent->val_->at_path(_name).as_array()};
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}
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OutputObjectType add_object_to_array(
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const size_t _size, OutputArrayType* _parent) const noexcept {
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const auto i = _parent->val_->size();
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_parent->val_->push_back(::toml::table());
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return OutputObjectType{_parent->val_->at(i).as_table()};
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}
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OutputObjectType add_object_to_object(
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const std::string_view& _name, const size_t _size,
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OutputObjectType* _parent) const noexcept {
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_parent->val_->emplace(_name, ::toml::table());
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return OutputObjectType{_parent->val_->at_path(_name).as_table()};
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}
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template <class T>
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OutputVarType add_value_to_array(const T& _var,
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OutputArrayType* _parent) const noexcept {
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_parent->val_->push_back(::toml::value(_var));
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return OutputVarType{};
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}
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template <class T>
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OutputVarType add_value_to_object(const std::string_view& _name,
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const T& _var,
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OutputObjectType* _parent) const noexcept {
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_parent->val_->emplace(_name, ::toml::value(_var));
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return OutputVarType{};
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}
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OutputVarType add_null_to_array(OutputArrayType* _parent) const noexcept {
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_parent->val_->push_back(std::string(""));
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return OutputVarType{};
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}
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OutputVarType add_null_to_object(const std::string_view& _name,
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OutputObjectType* _parent) const noexcept {
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_parent->val_->emplace(_name, ::toml::value(std::string("")));
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return OutputVarType{};
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}
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void end_array(OutputArrayType* _arr) const noexcept {}
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void end_object(OutputObjectType* _obj) const noexcept {}
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private:
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::toml::table* root_;
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};
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} // namespace rfl::toml
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#endif // JSON_PARSER_HPP_
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