Code Coverage for /src/src/Grammar/TokenMatcher.php

1	<?php
2	/**
3	* @file
4	* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
5	*/
6
7	namespace Wikimedia\CSS\Grammar;
8
9	use Wikimedia\CSS\Objects\ComponentValueList;
10	use Wikimedia\CSS\Objects\Token;
11
12	/**
13	* Matcher that matches a token of a particular type
14	* @see https://www.w3.org/TR/2019/CR-css-values-3-20190606/#component-types
15	*/
16	class TokenMatcher extends Matcher {
17	/** @var string One of the Token::T_* constants */
18	protected $type;
19
20	/** @var callable\|null Something to call to further validate the token */
21	protected $callback = null;
22
23	/**
24	* @param string $type Token type to match
25	* @param callable\|null $callback Something to call to further validate the token.
26	* bool callback( Token )
27	*/
28	public function __construct( $type, callable $callback = null ) {
29	$this->type = $type;
30	$this->callback = $callback;
31	}
32
33	/** @inheritDoc */
34	protected function generateMatches( ComponentValueList $values, $start, array $options ) {
35	$cv = $values[$start] ?? null;
36	if ( $cv instanceof Token && $cv->type() === $this->type &&
37	( !$this->callback \|\| call_user_func( $this->callback, $cv ) )
38	) {
39	yield $this->makeMatch( $values, $start, $this->next( $values, $start, $options ) );
40	}
41	}
42	}