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32 lines
615 B
32 lines
615 B
<?php
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declare(strict_types=1);
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namespace App\Engine\Cfnpp\Expression;
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/**
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* Token representing a distinct part of an expression.
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*
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* @author Adam Pippin <hello@adampippin.ca>
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*/
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abstract class Token
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{
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/**
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* Check whether the stream passed in contains a valid token of this
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* type.
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*
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* @param string $stream
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* @return bool
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*/
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abstract public static function isToken(string $stream): bool;
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/**
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* Consume a token from the stream.
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*
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* Only valid if isToken is true.
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*
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* @param string $stream
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* @return Token
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*/
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abstract public static function getToken(string &$stream): Token;
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}
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