Michael Fabian 'Xaymar' Dirks
115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
/// AUTOGENERATED COPYRIGHT HEADER START
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// Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
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// AUTOGENERATED COPYRIGHT HEADER END
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#pragma once
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#include <list>
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#include <memory>
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#include <optional>
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#include <string>
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#include "../lexer.hpp"
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// BlitzBasic Built-Ins
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// - Include: Followed by a String, which is the file to include at this location.
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// - Const: Defines one or more constants, which can not be modified.
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// - Local: Defines one or more local variables, which can be modified.
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// - Global: Defines one or more global variables, which can be modified from anywhere.
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// - Dim: Defines a dynamically resizable array, globally accessible and modifyable.
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// - If, Then, ElseIf, EndIf: Your classic If.
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// - Select, Case, Default, End Select: Your classic Select.
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// - For, To, Step, Next: Your classic For loop.
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// - While, Wend: Your classic While loop.
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// - Repeat, Until, Forever: Similar to While/Wend, but the condition is at the end and will only loop if the condition is false.
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// - Exit: Exit from any currently active loops. I guess this allows leaving Repeat/Forever combinations.
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// - True, False: True and False. What, did you expect something else?
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// - Stop: Pause the program for the debugger, if there happens to be one.
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// - End: Terminate the program.
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// - Goto: Jump to a specific label, without setting the return address.
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// - Gosub, Return: Jump to a specific label (subroutine), setting the return address appropriately, and Return from it eventually.
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// - 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.
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// - And, Or, Not: Logical operator, self-explanatory really.
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namespace blitz {
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namespace ast {
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class expression {
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public:
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virtual ~expression() = default;
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};
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// Values
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class value_expression : public expression {
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protected:
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blitz::token _token;
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public:
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virtual ~value_expression() = default;
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value_expression(blitz::token token);
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};
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class integer_expression : public value_expression {
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protected:
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int32_t _value;
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public:
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virtual ~integer_expression() = default;
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integer_expression(blitz::token token);
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};
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class real_expression : public value_expression {
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protected:
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float _value;
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public:
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virtual ~real_expression() = default;
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real_expression(blitz::token token);
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};
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class string_expression : public value_expression {
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std::string _value;
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public:
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virtual ~string_expression() = default;
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string_expression(blitz::token token);
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};
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/** One or more constant values
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*
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* Const var = Value, var2 = value
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*/
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class const_expression : public expression {
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std::list<std::shared_ptr<variable_expression>> _values;
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};
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/** One or more local variables
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*
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* Local var, var2 = value, var3
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*/
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class local_expression : public expression {
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std::list<std::shared_ptr<variable_expression>> _values;
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};
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/** One or more global variables
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*
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* Local var, var2 = value, var3
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*/
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class global_expression : public expression {
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std::list<std::shared_ptr<variable_expression>> _values;
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};
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/** A variable definition
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*
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*
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*/
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class variable_expression : public expression {
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blitz::token _assign;
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std::string _name;
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std::shared_ptr<value_expression> _value;
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public:
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virtual ~variable_expression() = default;
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variable_expression(blitz::token token);
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};
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} // namespace ast
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} // namespace blitz
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