| 1: | <?php declare(strict_types=1); |
| 2: | |
| 3: | namespace PhpParser\Lexer\TokenEmulator; |
| 4: | |
| 5: | use PhpParser\Lexer\Emulative; |
| 6: | |
| 7: | final class CoaleseEqualTokenEmulator extends TokenEmulator |
| 8: | { |
| 9: | public function getPhpVersion(): string |
| 10: | { |
| 11: | return Emulative::PHP_7_4; |
| 12: | } |
| 13: | |
| 14: | public function isEmulationNeeded(string $code): bool |
| 15: | { |
| 16: | return strpos($code, '??=') !== false; |
| 17: | } |
| 18: | |
| 19: | public function emulate(string $code, array $tokens): array |
| 20: | { |
| 21: | |
| 22: | |
| 23: | $line = 1; |
| 24: | for ($i = 0, $c = count($tokens); $i < $c; ++$i) { |
| 25: | if (isset($tokens[$i + 1])) { |
| 26: | if ($tokens[$i][0] === T_COALESCE && $tokens[$i + 1] === '=') { |
| 27: | array_splice($tokens, $i, 2, [ |
| 28: | [\T_COALESCE_EQUAL, '??=', $line] |
| 29: | ]); |
| 30: | $c--; |
| 31: | continue; |
| 32: | } |
| 33: | } |
| 34: | if (\is_array($tokens[$i])) { |
| 35: | $line += substr_count($tokens[$i][1], "\n"); |
| 36: | } |
| 37: | } |
| 38: | |
| 39: | return $tokens; |
| 40: | } |
| 41: | |
| 42: | public function reverseEmulate(string $code, array $tokens): array |
| 43: | { |
| 44: | |
| 45: | return $tokens; |
| 46: | } |
| 47: | } |
| 48: | |