BlitzLLVM/code_compiler/source/ast/ast.hpp

/// AUTOGENERATED COPYRIGHT HEADER START
// Copyright (C) 2017-2025 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
// AUTOGENERATED COPYRIGHT HEADER END
#pragma once
#include <list>
#include <memory>
#include <optional>
#include <string>
#include "../lexer.hpp"
#include "../types.hpp"

// BlitzBasic Built-Ins
// - Include: Followed by a String, which is the file to include at this location.
// - Const: Defines one or more constants, which can not be modified.
// - Local: Defines one or more local variables, which can be modified.
// - Global: Defines one or more global variables, which can be modified from anywhere.
// - Dim: Defines a dynamically resizable array, globally accessible and modifyable.
// - If, Then, ElseIf, EndIf: Your classic If.
// - Select, Case, Default, End Select: Your classic Select.
// - For, To, Step, Next: Your classic For loop.
// - While, Wend: Your classic While loop.
// - Repeat, Until, Forever: Similar to While/Wend, but the condition is at the end and will only loop if the condition is false.
// - Exit: Exit from any currently active loops. I guess this allows leaving Repeat/Forever combinations.
// - True, False: True and False. What, did you expect something else?
// - Stop: Pause the program for the debugger, if there happens to be one.
// - End: Terminate the program.
// - Goto: Jump to a specific label, without setting the return address.
// - Gosub, Return: Jump to a specific label (subroutine), setting the return address appropriately, and Return from it eventually.
// - Function, Return, End Function: Defines a function, and allows returning values. Yes, I know, End itself terminates the program, this is a special case. Thanks younger Sibly.
// - And, Or, Not: Logical operator, self-explanatory really.

namespace blitz {
	namespace ast {
		struct node {
			std::vector<blitz::token> tokens;

			virtual ~node() = default;
		};

		struct variable : public node {
			std::string        name;
			blitz::types::type type;
			std::string        struct_name;

			virtual ~variable();

			static bool                              can_parse(std::shared_ptr<blitz::lexer> lexer);
			static std::shared_ptr<blitz::ast::node> try_parse(std::shared_ptr<blitz::lexer> lexer);
		};

		struct value : public node {
			enum class variant {
				UNKNOWN,
				NULL,
				BOOL,
				INTEGER,
				UNSIGNED_INTEGER,
				REAL,
				STRING,
			} type;
			union {
				bool      b;
				intmax_t  i;
				uintmax_t ui;
				double    f;
			} number;
			std::string text;

			virtual ~value();

			static bool                              can_parse(std::shared_ptr<blitz::lexer> lexer);
			static std::shared_ptr<blitz::ast::node> try_parse(std::shared_ptr<blitz::lexer> lexer);
		};

		struct expression : public node {};

	} // namespace ast
} // namespace blitz