Rework Grammar and Parser

Properly construct headless binary with basic validation and print functionality

Add Error and Warning structs to Parser
Add FileNode pointer getter to Parser
Change all `char8_t*` and `const char8_t` to `const char*` in Parser
Add Parser move operators and Parser deconstructor
Add BufferHandler PIMPL object to Parser
Add UTF-8 file Warning

Add proper Grammar value retrieval
Simplify AST node resolution for Grammar

Add AbstractSyntaxTree for v2script data parser:
	Has compile-time embedded type information accessible at compile-time and runtime
	Optionally compiled AST print functionality

Add detail/TypeName.hpp
Add detail/SelfType.hpp
Add detail/DetectUtf8.hpp
Add detail/Errors.hpp
Add detail/Warnings.hpp

Add `OPENVIC_DATALOADER_PRINT_NODES` for headless construction
Fix wrong environment reference for headless construction in SConstruct

1 files changed, 63 insertions, 11 deletions

diff --git a/include/openvic-dataloader/v2script/Parser.hpp b/include/openvic-dataloader/v2script/Parser.hpp
index 53aab90..dbbec73 100644
--- a/include/openvic-dataloader/v2script/Parser.hpp
+++ b/include/openvic-dataloader/v2script/Parser.hpp
@@ -1,27 +1,79 @@
 #pragma once
 
 #include <cstddef>
-#include <cstdio>
+#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:
-		static Parser from_buffer(char8_t* data, std::size_t size);
-		static Parser from_buffer(char8_t* start, char8_t* end);
-		static Parser from_file(const char8_t* path);
+		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_path(const char8_t* path);
-		void set_error_log_to(std::basic_ostream<char8_t> stream);
-		void set_error_log_to(std::FILE* file);
+		void set_error_log_to_stdout();
+		void set_error_log_to(std::basic_ostream<char>& stream);
 
-		bool parse();
+		bool simple_parse();
 
-		bool has_error();
-		bool has_warning();
+		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:
-		Parser();
+		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);
 	};
 }
\ No newline at end of file