|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Vanderlee\Comprehend\Parser\Structure; |
|
4
|
|
|
|
|
5
|
|
|
use InvalidArgumentException; |
|
6
|
|
|
use Vanderlee\Comprehend\Core\Context; |
|
7
|
|
|
use Vanderlee\Comprehend\Match\Success; |
|
8
|
|
|
use Vanderlee\Comprehend\Parser\Parser; |
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* Description of RepeatParser. |
|
12
|
|
|
* |
|
13
|
|
|
* @author Martijn |
|
14
|
|
|
*/ |
|
15
|
|
|
class Repeat extends Parser |
|
16
|
|
|
{ |
|
17
|
|
|
use SpacingTrait; |
|
18
|
|
|
|
|
19
|
|
|
//use GreedyTrait; |
|
20
|
|
|
|
|
21
|
|
|
private $parser; |
|
22
|
|
|
private $min; |
|
23
|
|
|
private $max; |
|
24
|
|
|
|
|
25
|
42 |
|
public function __construct($parser, $min = 0, $max = null) |
|
26
|
|
|
{ |
|
27
|
42 |
|
$this->parser = $this->getArgument($parser); |
|
28
|
42 |
|
$this->min = $min; |
|
29
|
42 |
|
$this->max = $max; |
|
30
|
|
|
|
|
31
|
42 |
|
if ($this->max !== null && $this->max < $this->min) { |
|
32
|
1 |
|
throw new InvalidArgumentException('Invalid repeat range specified'); |
|
33
|
|
|
} |
|
34
|
41 |
|
} |
|
35
|
|
|
|
|
36
|
9 |
|
public static function plus($parser) |
|
37
|
|
|
{ |
|
38
|
9 |
|
return new self($parser, 1, null); |
|
39
|
|
|
} |
|
40
|
|
|
|
|
41
|
9 |
|
public static function star($parser) |
|
42
|
|
|
{ |
|
43
|
9 |
|
return new self($parser, 0, null); |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
9 |
|
public static function optional($parser) |
|
47
|
|
|
{ |
|
48
|
9 |
|
return new self($parser, 0, 1); |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
1 |
|
public static function exact($parser, $times) |
|
52
|
|
|
{ |
|
53
|
1 |
|
return new self($parser, $times, $times); |
|
54
|
|
|
} |
|
55
|
|
|
|
|
56
|
150 |
|
protected function parse(&$input, $offset, Context $context) |
|
57
|
|
|
{ |
|
58
|
150 |
|
$childMatches = []; |
|
59
|
|
|
|
|
60
|
150 |
|
$this->pushSpacer($context); |
|
61
|
|
|
|
|
62
|
150 |
|
$length = 0; |
|
63
|
|
|
do { |
|
64
|
|
|
// No skipping at very start |
|
65
|
150 |
|
$skip = $length > 0 |
|
66
|
104 |
|
? $context->skipSpacing($input, $offset + $length) |
|
67
|
150 |
|
: 0; |
|
68
|
|
|
|
|
69
|
150 |
|
if ($skip === false) { |
|
70
|
1 |
|
break; |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
150 |
|
$match = $this->parser->parse($input, $offset + $length + $skip, $context); |
|
74
|
150 |
|
if ($match instanceof Success) { |
|
75
|
125 |
|
$length += $skip + $match->length; |
|
76
|
125 |
|
$childMatches[] = $match; |
|
77
|
|
|
} |
|
78
|
150 |
|
} while (($match instanceof Success) |
|
79
|
125 |
|
&& ($this->max === null |
|
80
|
150 |
|
|| count($childMatches) < $this->max)); |
|
81
|
|
|
|
|
82
|
150 |
|
$this->popSpacer($context); |
|
83
|
|
|
|
|
84
|
150 |
|
return count($childMatches) >= $this->min |
|
85
|
133 |
|
? $this->success($input, $offset, $length, $childMatches) |
|
86
|
150 |
|
: $this->failure($input, $offset, $length); |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
90 |
|
public function __toString() |
|
90
|
|
|
{ |
|
91
|
|
|
// Output ABNF formatting |
|
92
|
|
|
|
|
93
|
90 |
|
$min = $this->min > 0 |
|
94
|
70 |
|
? $this->min |
|
95
|
90 |
|
: ''; |
|
96
|
90 |
|
$max = $this->max === null |
|
97
|
44 |
|
? '' |
|
98
|
90 |
|
: $this->max; |
|
99
|
|
|
|
|
100
|
90 |
|
return ($min === $max |
|
101
|
42 |
|
? $min |
|
102
|
90 |
|
: ($min . '*' . $max)) . $this->parser; |
|
103
|
|
|
} |
|
104
|
|
|
} |
|
105
|
|
|
|
vanderlee /
Comprehend
