<?php namespace NXP\Classes; class Token { public const Literal = 'literal'; public const Variable = 'variable'; public const Operator = 'operator'; public const LeftParenthesis = 'LP'; public const RightParenthesis = 'RP'; public const Function = 'function'; public const ParamSeparator = 'separator'; public const String = 'string'; public const Space = 'space'; public ?int $paramCount = null;//to store function parameter count in stack /** * Token constructor. * */ public function __construct(public string $type, public mixed $value, public ?string $name = null) { } }