/*************************************************************************/
/*  script_class_parser.h                                                */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/*************************************************************************/

#ifndef SCRIPT_CLASS_PARSER_H
#define SCRIPT_CLASS_PARSER_H

#include "core/string/ustring.h"
#include "core/templates/vector.h"
#include "core/variant/variant.h"

class ScriptClassParser {
public:
	struct NameDecl {
		enum Type {
			NAMESPACE_DECL,
			CLASS_DECL,
			STRUCT_DECL
		};

		String name;
		Type type;
	};

	struct ClassDecl {
		String name;
		String namespace_;
		Vector<String> base;
		bool nested;
	};

private:
	String code;
	int idx;
	int line;
	String error_str;
	bool error;
	Variant value;

	Vector<ClassDecl> classes;

	enum Token {
		TK_BRACKET_OPEN,
		TK_BRACKET_CLOSE,
		TK_CURLY_BRACKET_OPEN,
		TK_CURLY_BRACKET_CLOSE,
		TK_PERIOD,
		TK_COLON,
		TK_COMMA,
		TK_SYMBOL,
		TK_IDENTIFIER,
		TK_STRING,
		TK_NUMBER,
		TK_OP_LESS,
		TK_OP_GREATER,
		TK_EOF,
		TK_ERROR,
		TK_MAX
	};

	static const char *token_names[TK_MAX];
	static String get_token_name(Token p_token);

	Token get_token();

	Error _skip_generic_type_params();

	Error _parse_type_full_name(String &r_full_name);
	Error _parse_class_base(Vector<String> &r_base);
	Error _parse_type_constraints();
	Error _parse_namespace_name(String &r_name, int &r_curly_stack);

public:
	Error parse(const String &p_code);
	Error parse_file(const String &p_filepath);

	String get_error();

	Vector<ClassDecl> get_classes();
};

#endif // SCRIPT_CLASS_PARSER_H