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<?php /* * This file is part of Psy Shell. * * (c) 2012-2026 Justin Hileman * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Psy\Readline\Interactive\Helper; /** * Shared token analysis utilities. */ class TokenHelper { /** @var int[] Token types that indicate a statement continues on the next line */ private const TRAILING_TOKEN_OPS = [ \T_OBJECT_OPERATOR, \T_PAAMAYIM_NEKUDOTAYIM, \T_BOOLEAN_AND, \T_BOOLEAN_OR, \T_LOGICAL_AND, \T_LOGICAL_OR, \T_DOUBLE_ARROW, \T_COALESCE, \T_SPACESHIP, ]; /** @var string[] Single-character operators that indicate continuation */ private const TRAILING_CHAR_OPS = ['+', '-', '*', '/', '%', '.', '=', '&', '|', '^', '<', '>', ',']; /** * Check whether the last non-whitespace token is a trailing operator. * * Used to determine whether a statement continues onto the next line. * * @param array $tokens token_get_all tokens */ public static function hasTrailingOperator(array $tokens): bool { if (empty($tokens)) { return false; } $lastToken = null; for ($i = \count($tokens) - 1; $i >= 0; $i--) { $token = $tokens[$i]; if (\is_array($token) && $token[0] === \T_WHITESPACE) { continue; } $lastToken = $token; break; } if ($lastToken === null) { return false; } if (\is_array($lastToken)) { return \in_array($lastToken[0], self::TRAILING_TOKEN_OPS, true); } return \in_array($lastToken, self::TRAILING_CHAR_OPS, true); } }
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