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<?php |
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/** |
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* ExtendedEmulativeLexer.php |
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* |
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* MIT LICENSE |
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* |
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* LICENSE: This source file is subject to the MIT license. |
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* A copy of the licenses text was distributed alongside this |
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* file (usually the repository or package root). The text can also |
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* be obtained on one of the following sources: |
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* * http://opensource.org/licenses/MIT |
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* * https://github.com/suralc/pvra/blob/master/LICENSE |
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* |
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* @author suralc <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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namespace Pvra\Lexer; |
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use PhpParser\Lexer\Emulative; |
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use PhpParser\Parser\Tokens; |
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/** |
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* Class ExtendedEmulativeLexer |
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* |
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* Extends the lexer to provide information about raw representations of numbers, |
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* detection of here- and nowdoc syntaxes and short echo statements. |
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* |
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* @package Pvra\Lexer |
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*/ |
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class ExtendedEmulativeLexer extends Emulative |
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{ |
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/** |
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* Create a new Lexer instance with appropriate configuration options |
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* |
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* Whenever a new lexer instance is created that is meant to be passed to |
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* a `Pvra\Analyser` or consumed by a `Pvra\AnalyserAwareInterface` this method should be used. |
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* |
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* @return ExtendedEmulativeLexer|static |
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*/ |
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public static function createDefaultInstance() |
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{ |
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$class = get_called_class(); |
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return new $class(['usedAttributes' => ['startLine', 'endLine', 'startFilePos', 'startTokenPos']]); |
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} |
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/** |
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* Override to the native getNextToken method |
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* |
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* This method override ensures that the original value of tokens that would be transformed is stored |
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* besides them in the result ast. Depending on the token type various attributes will be added to the token |
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* and produced ast. These modifications are required to ensure the correct behaviour of the binary number |
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* detection, the detection of booth flavors of the doc syntax, short array syntax and short echo tags. |
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* |
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* @param null|string $value Value of the token |
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* @param null|array $startAttributes |
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* @param null|array $endAttributes |
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* @return int Retrieved token id |
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* @see https://github.com/nikic/PHP-Parser/issues/26#issuecomment-6150035 Original implementation |
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*/ |
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public function getNextToken(&$value = null, &$startAttributes = null, &$endAttributes = null) |
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{ |
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$tokenId = parent::getNextToken($value, $startAttributes, $endAttributes); |
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if ($tokenId === Tokens::T_LNUMBER || $tokenId === Tokens::T_DNUMBER) { |
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// could also use $startAttributes, doesn't really matter here |
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$endAttributes['originalValue'] = $value; |
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} elseif ($tokenId === Tokens::T_START_HEREDOC) { |
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$startAttributes['isDocSyntax'] = true; |
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if (substr($this->code, $startAttributes['startFilePos'] + 3, 1) === '\'') { |
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$startAttributes['isNowDoc'] = true; |
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} else { |
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$startAttributes['isHereDoc'] = true; |
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} |
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} elseif ($tokenId === Tokens::T_ARRAY) { |
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$startAttributes['traditionalArray'] = true; |
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} elseif ($tokenId === Tokens::T_ECHO) { |
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if (substr($this->code, $startAttributes['startFilePos'], 3) === '<?=') { |
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$startAttributes['isShortEchoTag'] = true; |
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} |
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} |
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return $tokenId; |
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} |
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} |
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suralc /
pvra
