1: | <?php declare(strict_types=1); |
2: | |
3: | namespace PhpParser\Lexer\TokenEmulator; |
4: | |
5: | use PhpParser\PhpVersion; |
6: | use PhpParser\Token; |
7: | |
8: | class VoidCastEmulator extends TokenEmulator { |
9: | public function getPhpVersion(): PhpVersion { |
10: | return PhpVersion::fromComponents(8, 5); |
11: | } |
12: | |
13: | public function isEmulationNeeded(string $code): bool { |
14: | return (bool)\preg_match('/\([ \t]*void[ \t]*\)/i', $code); |
15: | } |
16: | |
17: | public function emulate(string $code, array $tokens): array { |
18: | for ($i = 0, $c = count($tokens); $i < $c; ++$i) { |
19: | $token = $tokens[$i]; |
20: | if ($token->text !== '(') { |
21: | continue; |
22: | } |
23: | |
24: | $numTokens = 1; |
25: | $text = '('; |
26: | $j = $i + 1; |
27: | if ($j < $c && $tokens[$j]->id === \T_WHITESPACE && preg_match('/[ \t]+/', $tokens[$j]->text)) { |
28: | $text .= $tokens[$j]->text; |
29: | $numTokens++; |
30: | $j++; |
31: | } |
32: | |
33: | if ($j >= $c || $tokens[$j]->id !== \T_STRING || \strtolower($tokens[$j]->text) !== 'void') { |
34: | continue; |
35: | } |
36: | |
37: | $text .= $tokens[$j]->text; |
38: | $numTokens++; |
39: | $k = $j + 1; |
40: | if ($k < $c && $tokens[$k]->id === \T_WHITESPACE && preg_match('/[ \t]+/', $tokens[$k]->text)) { |
41: | $text .= $tokens[$k]->text; |
42: | $numTokens++; |
43: | $k++; |
44: | } |
45: | |
46: | if ($k >= $c || $tokens[$k]->text !== ')') { |
47: | continue; |
48: | } |
49: | |
50: | $text .= ')'; |
51: | $numTokens++; |
52: | array_splice($tokens, $i, $numTokens, [ |
53: | new Token(\T_VOID_CAST, $text, $token->line, $token->pos), |
54: | ]); |
55: | $c -= $numTokens - 1; |
56: | } |
57: | return $tokens; |
58: | } |
59: | |
60: | public function reverseEmulate(string $code, array $tokens): array { |
61: | for ($i = 0, $c = count($tokens); $i < $c; ++$i) { |
62: | $token = $tokens[$i]; |
63: | if ($token->id !== \T_VOID_CAST) { |
64: | continue; |
65: | } |
66: | |
67: | if (!preg_match('/^\(([ \t]*)(void)([ \t]*)\)$/i', $token->text, $match)) { |
68: | throw new \LogicException('Unexpected T_VOID_CAST contents'); |
69: | } |
70: | |
71: | $newTokens = []; |
72: | $pos = $token->pos; |
73: | |
74: | $newTokens[] = new Token(\ord('('), '(', $token->line, $pos); |
75: | $pos++; |
76: | |
77: | if ($match[1] !== '') { |
78: | $newTokens[] = new Token(\T_WHITESPACE, $match[1], $token->line, $pos); |
79: | $pos += \strlen($match[1]); |
80: | } |
81: | |
82: | $newTokens[] = new Token(\T_STRING, $match[2], $token->line, $pos); |
83: | $pos += \strlen($match[2]); |
84: | |
85: | if ($match[3] !== '') { |
86: | $newTokens[] = new Token(\T_WHITESPACE, $match[3], $token->line, $pos); |
87: | $pos += \strlen($match[3]); |
88: | } |
89: | |
90: | $newTokens[] = new Token(\ord(')'), ')', $token->line, $pos); |
91: | |
92: | array_splice($tokens, $i, 1, $newTokens); |
93: | $i += \count($newTokens) - 1; |
94: | $c += \count($newTokens) - 1; |
95: | } |
96: | return $tokens; |
97: | } |
98: | } |
99: | |