2020-07-15 21:40:05 +02:00
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<?php declare(strict_types=1);
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namespace PhpParser\Lexer\TokenEmulator;
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use PhpParser\Lexer\Emulative;
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final class MatchTokenEmulator implements TokenEmulatorInterface
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{
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2020-08-01 21:49:53 +02:00
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public function getPhpVersion(): string
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2020-07-15 21:40:05 +02:00
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{
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2020-08-01 21:49:53 +02:00
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return Emulative::PHP_8_0;
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}
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2020-07-15 21:40:05 +02:00
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2020-08-01 21:49:53 +02:00
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public function isEmulationNeeded(string $code): bool
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{
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2020-07-15 21:40:05 +02:00
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return strpos($code, 'match') !== false;
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}
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public function emulate(string $code, array $tokens): array
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{
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foreach ($tokens as $i => $token) {
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if ($token[0] === T_STRING && strtolower($token[1]) === 'match') {
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$previousNonSpaceToken = $this->getPreviousNonSpaceToken($tokens, $i);
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if ($previousNonSpaceToken !== null && $previousNonSpaceToken[0] === T_OBJECT_OPERATOR) {
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continue;
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}
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$tokens[$i][0] = Emulative::T_MATCH;
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}
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}
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return $tokens;
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}
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/**
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* @param mixed[] $tokens
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* @return mixed[]|null
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*/
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private function getPreviousNonSpaceToken(array $tokens, int $start)
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{
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for ($i = $start - 1; $i >= 0; --$i) {
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if ($tokens[$i][0] === T_WHITESPACE) {
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continue;
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}
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return $tokens[$i];
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}
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return null;
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}
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}
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