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<?php declare(strict_types=1);
namespace PhpParser\Lexer\TokenEmulator;
use PhpParser\PhpVersion;
use PhpParser\Token;
class VoidCastEmulator extends TokenEmulator {
public function getPhpVersion(): PhpVersion {
return PhpVersion::fromComponents(8, 5);
}
public function isEmulationNeeded(string $code): bool {
return (bool)\preg_match('/\([ \t]*void[ \t]*\)/i', $code);
}
public function emulate(string $code, array $tokens): array {
for ($i = 0, $c = count($tokens); $i < $c; ++$i) {
$token = $tokens[$i];
if ($token->text !== '(') {
continue;
}
$numTokens = 1;
$text = '(';
$j = $i + 1;
if ($j < $c && $tokens[$j]->id === \T_WHITESPACE && preg_match('/[ \t]+/', $tokens[$j]->text)) {
$text .= $tokens[$j]->text;
$numTokens++;
$j++;
}
if ($j >= $c || $tokens[$j]->id !== \T_STRING || \strtolower($tokens[$j]->text) !== 'void') {
continue;
}
$text .= $tokens[$j]->text;
$numTokens++;
$k = $j + 1;
if ($k < $c && $tokens[$k]->id === \T_WHITESPACE && preg_match('/[ \t]+/', $tokens[$k]->text)) {
$text .= $tokens[$k]->text;
$numTokens++;
$k++;
}
if ($k >= $c || $tokens[$k]->text !== ')') {
continue;
}
$text .= ')';
$numTokens++;
array_splice($tokens, $i, $numTokens, [
new Token(\T_VOID_CAST, $text, $token->line, $token->pos),
]);
$c -= $numTokens - 1;
}
return $tokens;
}
public function reverseEmulate(string $code, array $tokens): array {
for ($i = 0, $c = count($tokens); $i < $c; ++$i) {
$token = $tokens[$i];
if ($token->id !== \T_VOID_CAST) {
continue;
}
if (!preg_match('/^\(([ \t]*)(void)([ \t]*)\)$/i', $token->text, $match)) {
throw new \LogicException('Unexpected T_VOID_CAST contents');
}
$newTokens = [];
$pos = $token->pos;
$newTokens[] = new Token(\ord('('), '(', $token->line, $pos);
$pos++;
if ($match[1] !== '') {
$newTokens[] = new Token(\T_WHITESPACE, $match[1], $token->line, $pos);
$pos += \strlen($match[1]);
}
$newTokens[] = new Token(\T_STRING, $match[2], $token->line, $pos);
$pos += \strlen($match[2]);
if ($match[3] !== '') {
$newTokens[] = new Token(\T_WHITESPACE, $match[3], $token->line, $pos);
$pos += \strlen($match[3]);
}
$newTokens[] = new Token(\ord(')'), ')', $token->line, $pos);
array_splice($tokens, $i, 1, $newTokens);
$i += \count($newTokens) - 1;
$c += \count($newTokens) - 1;
}
return $tokens;
}
}
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