include/openvic-dataloader/v2script/Parser.hpp


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#pragma once

#include <cstddef>
#include <functional>
#include <memory>
#include <optional>
#include <ostream>
#include <string>
#include <vector>

#include <openvic-dataloader/v2script/AbstractSyntaxTree.hpp>

namespace ovdl::v2script {

   using FileNode = ast::FileNode;

   class Parser {
   public:
      struct Error {
         const enum class Type : unsigned char {
            Recoverable,
            Fatal
         } type;
         const std::string message;
         const int error_value;
      };

      struct Warning {
         const std::string message;
         const int warning_value;
      };

      Parser();

      static Parser from_buffer(const char* data, std::size_t size);
      static Parser from_buffer(const char* start, const char* end);
      static Parser from_file(const char* path);

      Parser& load_from_buffer(const char* data, std::size_t size);
      Parser& load_from_buffer(const char* start, const char* end);
      Parser& load_from_file(const char* path);

      void set_error_log_to_null();
      void set_error_log_to_stderr();
      void set_error_log_to_stdout();
      void set_error_log_to(std::basic_ostream<char>& stream);

      bool simple_parse();

      bool has_error() const;
      bool has_fatal_error() const;
      bool has_warning() const;

      const std::vector<Error>& get_errors() const;
      const std::vector<Warning>& get_warnings() const;

      const FileNode* get_file_node() const;

      Parser(Parser&&);
      Parser& operator=(Parser&&);

      ~Parser();

   private:
      std::vector<Error> _errors;
      std::vector<Warning> _warnings;

      class BufferHandler;
      friend class BufferHandler;
      std::unique_ptr<BufferHandler> _buffer_handler;
      std::unique_ptr<FileNode> _file_node;
      std::reference_wrapper<std::ostream> _error_stream;
      const char* _file_path;
      bool _has_fatal_error = false;

      template<typename... Args>
      inline void _run_load_func(std::optional<Error> (BufferHandler::*func)(Args...), Args... args);
   };
}