PredictionContextCache::__construct() - Code Metrics - SetBased/antlr-php-runtime - Measure and Improve Code Quality continuously with Scrutinizer

PredictionContextCache::__construct() A
last analyzed 2020-12-10 13:11 UTC

↳ Parent: PredictionContextCache

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	1
c	1
b	0
f	0
nc	1
nop	0
dl	0
loc	3
ccs	2
cts	2
cp	1
crap	1
rs	10

<?php

declare(strict_types=1);

namespace Antlr\Antlr4\Runtime\PredictionContexts;

use Antlr\Antlr4\Runtime\Utils\Map;

/**
 * Used to cache {@see PredictionContext} objects. Its used for the shared
 * context cash associated with contexts in DFA states. This cache
 * can be used for both lexers and parsers.
 */
class PredictionContextCache
{
    /** @var Map */
    protected $cache;

    public function __construct()
    {
        $this->cache = new Map();
    }

    /**
     * Add a context to the cache and return it. If the context already exists,
     * return that one instead and do not add a new context to the cache.
     * Protect shared cache from unsafe thread access.
     */
    public function add(PredictionContext $ctx) : PredictionContext
    {
        if ($ctx === PredictionContext::empty()) {

            return $ctx;
        }

        $existing = $this->cache->get($ctx);

        if ($existing !== null) {
            return $existing;
        }

        $this->cache->put($ctx, $ctx);

        return $ctx;
    }

    public function get(PredictionContext $ctx) : ?PredictionContext
    {
        return $this->cache->get($ctx);
    }

    public function length() : int
    {
        return $this->cache->count();
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Antlr\Antlr4\Runtime\PredictionContexts;
6
7		use Antlr\Antlr4\Runtime\Utils\Map;
8
9		/**
10		* Used to cache {@see PredictionContext} objects. Its used for the shared
11		* context cash associated with contexts in DFA states. This cache
12		* can be used for both lexers and parsers.
13		*/
14		class PredictionContextCache
15		{
16		/** @var Map */
17		protected $cache;
18
19	1	public function __construct()
20		{
21	1	$this->cache = new Map();
22	1	}
23
24		/**
25		* Add a context to the cache and return it. If the context already exists,
26		* return that one instead and do not add a new context to the cache.
27		* Protect shared cache from unsafe thread access.
28		*/
29	1	public function add(PredictionContext $ctx) : PredictionContext
30		{
31	1	if ($ctx === PredictionContext::empty()) {
		0 ignored issues – show introduced 2020-12-10 12:02 UTC by Report Bug Copy Issue Report The condition `$ctx === Antlr\Antlr4\Ru...dictionContext::empty()` is always `false`. Loading history...
32		return $ctx;
33		}
34
35	1	$existing = $this->cache->get($ctx);
36
37	1	if ($existing !== null) {
38		return $existing;
39		}
40
41	1	$this->cache->put($ctx, $ctx);
42
43	1	return $ctx;
44		}
45
46	2	public function get(PredictionContext $ctx) : ?PredictionContext
47		{
48	2	return $this->cache->get($ctx);
49		}
50
51		public function length() : int
52		{
53		return $this->cache->count();
54		}
55		}
56

SetBased / antlr-php-runtime

PredictionContextCache::__construct() A last analyzed 2020-12-10 13:11 UTC

Complexity

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Duplication

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Importance

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PredictionContextCache::__construct() A
last analyzed 2020-12-10 13:11 UTC