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<?php |
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// phpcs:ignoreFile -- Bundled third-party (Mozart) dependency; exempt from plugin coding standards. |
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|
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namespace WPDeveloper\BetterDocs\Dependencies\PhpParser; |
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|
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/* |
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* This parser is based on a skeleton written by Moriyoshi Koizumi, which in |
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* turn is based on work by Masato Bito. |
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*/ |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Name; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Param; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Scalar\LNumber; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Scalar\String_; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\Class_; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\ClassConst; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\ClassMethod; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\Interface_; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\Namespace_; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\Property; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\TryCatch; |
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use WPDeveloper\BetterDocs\Dependencies\PhpParser\Node\Stmt\UseUse; |
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|
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abstract class ParserAbstract implements Parser |
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{ |
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const SYMBOL_NONE = -1; |
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|
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/* |
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* The following members will be filled with generated parsing data: |
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*/ |
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|
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/** @var int Size of $tokenToSymbol map */ |
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protected $tokenToSymbolMapSize; |
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/** @var int Size of $action table */ |
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protected $actionTableSize; |
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/** @var int Size of $goto table */ |
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protected $gotoTableSize; |
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|
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/** @var int Symbol number signifying an invalid token */ |
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protected $invalidSymbol; |
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/** @var int Symbol number of error recovery token */ |
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protected $errorSymbol; |
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/** @var int Action number signifying default action */ |
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protected $defaultAction; |
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/** @var int Rule number signifying that an unexpected token was encountered */ |
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protected $unexpectedTokenRule; |
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|
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protected $YY2TBLSTATE; |
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protected $YYNLSTATES; |
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|
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/** @var array Map of lexer tokens to internal symbols */ |
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protected $tokenToSymbol; |
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/** @var array Map of symbols to their names */ |
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protected $symbolToName; |
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/** @var array Names of the production rules (only necessary for debugging) */ |
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protected $productions; |
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|
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/** @var array Map of states to a displacement into the $action table. The corresponding action for this |
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* state/symbol pair is $action[$actionBase[$state] + $symbol]. If $actionBase[$state] is 0, the |
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action is defaulted, i.e. $actionDefault[$state] should be used instead. */ |
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protected $actionBase; |
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/** @var array Table of actions. Indexed according to $actionBase comment. */ |
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protected $action; |
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/** @var array Table indexed analogously to $action. If $actionCheck[$actionBase[$state] + $symbol] != $symbol |
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* then the action is defaulted, i.e. $actionDefault[$state] should be used instead. */ |
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protected $actionCheck; |
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/** @var array Map of states to their default action */ |
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protected $actionDefault; |
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|
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/** @var array Map of non-terminals to a displacement into the $goto table. The corresponding goto state for this |
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* non-terminal/state pair is $goto[$gotoBase[$nonTerminal] + $state] (unless defaulted) */ |
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protected $gotoBase; |
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/** @var array Table of states to goto after reduction. Indexed according to $gotoBase comment. */ |
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protected $goto; |
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/** @var array Table indexed analogously to $goto. If $gotoCheck[$gotoBase[$nonTerminal] + $state] != $nonTerminal |
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* then the goto state is defaulted, i.e. $gotoDefault[$nonTerminal] should be used. */ |
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protected $gotoCheck; |
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/** @var array Map of non-terminals to the default state to goto after their reduction */ |
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protected $gotoDefault; |
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|
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/** @var array Map of rules to the non-terminal on their left-hand side, i.e. the non-terminal to use for |
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* determining the state to goto after reduction. */ |
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protected $ruleToNonTerminal; |
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/** @var array Map of rules to the length of their right-hand side, which is the number of elements that have to |
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* be popped from the stack(s) on reduction. */ |
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protected $ruleToLength; |
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|
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/* |
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* The following members are part of the parser state: |
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*/ |
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|
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/** @var Lexer Lexer that is used when parsing */ |
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protected $lexer; |
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/** @var mixed Temporary value containing the result of last semantic action (reduction) */ |
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protected $semValue; |
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/** @var int Position in stacks (state stack, semantic value stack, attribute stack) */ |
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protected $stackPos; |
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/** @var array Semantic value stack (contains values of tokens and semantic action results) */ |
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protected $semStack; |
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/** @var array[] Start attribute stack */ |
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protected $startAttributeStack; |
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/** @var array[] End attribute stack */ |
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protected $endAttributeStack; |
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/** @var array End attributes of last *shifted* token */ |
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protected $endAttributes; |
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/** @var array Start attributes of last *read* token */ |
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protected $lookaheadStartAttributes; |
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|
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/** @var ErrorHandler Error handler */ |
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protected $errorHandler; |
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/** @var Error[] Errors collected during last parse */ |
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protected $errors; |
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/** @var int Error state, used to avoid error floods */ |
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protected $errorState; |
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|
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/** |
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* Creates a parser instance. |
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* |
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* @param Lexer $lexer A lexer |
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* @param array $options Options array. Currently no options are supported. |
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*/ |
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public function __construct(Lexer $lexer, array $options = array()) { |
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$this->lexer = $lexer; |
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$this->errors = array(); |
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|
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if (isset($options['throwOnError'])) { |
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throw new \LogicException( |
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'"throwOnError" is no longer supported, use "errorHandler" instead'); |
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} |
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} |
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|
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/** |
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* Parses PHP code into a node tree. |
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* |
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* If a non-throwing error handler is used, the parser will continue parsing after an error |
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* occurred and attempt to build a partial AST. |
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* |
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* @param string $code The source code to parse |
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* @param ErrorHandler|null $errorHandler Error handler to use for lexer/parser errors, defaults |
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* to ErrorHandler\Throwing. |
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* |
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* @return Node[]|null Array of statements (or null if the 'throwOnError' option is disabled and the parser was |
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* unable to recover from an error). |
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*/ |
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public function parse($code, ?ErrorHandler $errorHandler = null) { |
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$this->errorHandler = $errorHandler ?: new ErrorHandler\Throwing; |
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|
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// Initialize the lexer |
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$this->lexer->startLexing($code, $this->errorHandler); |
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|
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// We start off with no lookahead-token |
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$symbol = self::SYMBOL_NONE; |
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|
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// The attributes for a node are taken from the first and last token of the node. |
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// From the first token only the startAttributes are taken and from the last only |
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// the endAttributes. Both are merged using the array union operator (+). |
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$startAttributes = '*POISON'; |
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$endAttributes = '*POISON'; |
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$this->endAttributes = $endAttributes; |
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|
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// Keep stack of start and end attributes |
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$this->startAttributeStack = array(); |
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$this->endAttributeStack = array($endAttributes); |
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|
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// Start off in the initial state and keep a stack of previous states |
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$state = 0; |
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$stateStack = array($state); |
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|
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// Semantic value stack (contains values of tokens and semantic action results) |
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$this->semStack = array(); |
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|
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// Current position in the stack(s) |
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$this->stackPos = 0; |
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|
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$this->errorState = 0; |
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|
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for (;;) { |
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//$this->traceNewState($state, $symbol); |
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|
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if ($this->actionBase[$state] == 0) { |
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$rule = $this->actionDefault[$state]; |
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} else { |
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if ($symbol === self::SYMBOL_NONE) { |
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// Fetch the next token id from the lexer and fetch additional info by-ref. |
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// The end attributes are fetched into a temporary variable and only set once the token is really |
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// shifted (not during read). Otherwise you would sometimes get off-by-one errors, when a rule is |
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// reduced after a token was read but not yet shifted. |
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$tokenId = $this->lexer->getNextToken($tokenValue, $startAttributes, $endAttributes); |
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|
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// map the lexer token id to the internally used symbols |
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$symbol = $tokenId >= 0 && $tokenId < $this->tokenToSymbolMapSize |
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? $this->tokenToSymbol[$tokenId] |
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: $this->invalidSymbol; |
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|
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if ($symbol === $this->invalidSymbol) { |
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throw new \RangeException(sprintf( |
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'The lexer returned an invalid token (id=%d, value=%s)', |
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$tokenId, $tokenValue |
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)); |
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} |
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|
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// This is necessary to assign some meaningful attributes to /* empty */ productions. They'll get |
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// the attributes of the next token, even though they don't contain it themselves. |
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$this->startAttributeStack[$this->stackPos+1] = $startAttributes; |
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$this->endAttributeStack[$this->stackPos+1] = $endAttributes; |
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$this->lookaheadStartAttributes = $startAttributes; |
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|
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//$this->traceRead($symbol); |
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} |
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|
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$idx = $this->actionBase[$state] + $symbol; |
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if ((($idx >= 0 && $idx < $this->actionTableSize && $this->actionCheck[$idx] == $symbol) |
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|| ($state < $this->YY2TBLSTATE |
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&& ($idx = $this->actionBase[$state + $this->YYNLSTATES] + $symbol) >= 0 |
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&& $idx < $this->actionTableSize && $this->actionCheck[$idx] == $symbol)) |
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&& ($action = $this->action[$idx]) != $this->defaultAction) { |
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/* |
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* >= YYNLSTATES: shift and reduce |
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* > 0: shift |
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* = 0: accept |
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* < 0: reduce |
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* = -YYUNEXPECTED: error |
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*/ |
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if ($action > 0) { |
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/* shift */ |
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//$this->traceShift($symbol); |
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|
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++$this->stackPos; |
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$stateStack[$this->stackPos] = $state = $action; |
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$this->semStack[$this->stackPos] = $tokenValue; |
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$this->startAttributeStack[$this->stackPos] = $startAttributes; |
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$this->endAttributeStack[$this->stackPos] = $endAttributes; |
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$this->endAttributes = $endAttributes; |
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$symbol = self::SYMBOL_NONE; |
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|
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if ($this->errorState) { |
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--$this->errorState; |
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} |
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|
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if ($action < $this->YYNLSTATES) { |
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continue; |
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} |
| 242 |
|
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/* $yyn >= YYNLSTATES means shift-and-reduce */ |
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$rule = $action - $this->YYNLSTATES; |
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} else { |
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$rule = -$action; |
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} |
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} else { |
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$rule = $this->actionDefault[$state]; |
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} |
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} |
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|
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for (;;) { |
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if ($rule === 0) { |
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/* accept */ |
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//$this->traceAccept(); |
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return $this->semValue; |
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} elseif ($rule !== $this->unexpectedTokenRule) { |
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/* reduce */ |
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//$this->traceReduce($rule); |
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|
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try { |
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$this->{'reduceRule' . $rule}(); |
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} catch (Error $e) { |
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if (-1 === $e->getStartLine() && isset($startAttributes['startLine'])) { |
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$e->setStartLine($startAttributes['startLine']); |
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} |
| 268 |
|
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$this->emitError($e); |
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// Can't recover from this type of error |
| 271 |
return null; |
| 272 |
} |
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|
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/* Goto - shift nonterminal */ |
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$lastEndAttributes = $this->endAttributeStack[$this->stackPos]; |
| 276 |
$this->stackPos -= $this->ruleToLength[$rule]; |
| 277 |
$nonTerminal = $this->ruleToNonTerminal[$rule]; |
| 278 |
$idx = $this->gotoBase[$nonTerminal] + $stateStack[$this->stackPos]; |
| 279 |
if ($idx >= 0 && $idx < $this->gotoTableSize && $this->gotoCheck[$idx] == $nonTerminal) { |
| 280 |
$state = $this->goto[$idx]; |
| 281 |
} else { |
| 282 |
$state = $this->gotoDefault[$nonTerminal]; |
| 283 |
} |
| 284 |
|
| 285 |
++$this->stackPos; |
| 286 |
$stateStack[$this->stackPos] = $state; |
| 287 |
$this->semStack[$this->stackPos] = $this->semValue; |
| 288 |
$this->endAttributeStack[$this->stackPos] = $lastEndAttributes; |
| 289 |
} else { |
| 290 |
/* error */ |
| 291 |
switch ($this->errorState) { |
| 292 |
case 0: |
| 293 |
$msg = $this->getErrorMessage($symbol, $state); |
| 294 |
$this->emitError(new Error($msg, $startAttributes + $endAttributes)); |
| 295 |
// Break missing intentionally |
| 296 |
case 1: |
| 297 |
case 2: |
| 298 |
$this->errorState = 3; |
| 299 |
|
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// Pop until error-expecting state uncovered |
| 301 |
while (!( |
| 302 |
(($idx = $this->actionBase[$state] + $this->errorSymbol) >= 0 |
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&& $idx < $this->actionTableSize && $this->actionCheck[$idx] == $this->errorSymbol) |
| 304 |
|| ($state < $this->YY2TBLSTATE |
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&& ($idx = $this->actionBase[$state + $this->YYNLSTATES] + $this->errorSymbol) >= 0 |
| 306 |
&& $idx < $this->actionTableSize && $this->actionCheck[$idx] == $this->errorSymbol) |
| 307 |
) || ($action = $this->action[$idx]) == $this->defaultAction) { // Not totally sure about this |
| 308 |
if ($this->stackPos <= 0) { |
| 309 |
// Could not recover from error |
| 310 |
return null; |
| 311 |
} |
| 312 |
$state = $stateStack[--$this->stackPos]; |
| 313 |
//$this->tracePop($state); |
| 314 |
} |
| 315 |
|
| 316 |
//$this->traceShift($this->errorSymbol); |
| 317 |
++$this->stackPos; |
| 318 |
$stateStack[$this->stackPos] = $state = $action; |
| 319 |
|
| 320 |
// We treat the error symbol as being empty, so we reset the end attributes |
| 321 |
// to the end attributes of the last non-error symbol |
| 322 |
$this->endAttributeStack[$this->stackPos] = $this->endAttributeStack[$this->stackPos - 1]; |
| 323 |
$this->endAttributes = $this->endAttributeStack[$this->stackPos - 1]; |
| 324 |
break; |
| 325 |
|
| 326 |
case 3: |
| 327 |
if ($symbol === 0) { |
| 328 |
// Reached EOF without recovering from error |
| 329 |
return null; |
| 330 |
} |
| 331 |
|
| 332 |
//$this->traceDiscard($symbol); |
| 333 |
$symbol = self::SYMBOL_NONE; |
| 334 |
break 2; |
| 335 |
} |
| 336 |
} |
| 337 |
|
| 338 |
if ($state < $this->YYNLSTATES) { |
| 339 |
break; |
| 340 |
} |
| 341 |
|
| 342 |
/* >= YYNLSTATES means shift-and-reduce */ |
| 343 |
$rule = $state - $this->YYNLSTATES; |
| 344 |
} |
| 345 |
} |
| 346 |
|
| 347 |
throw new \RuntimeException('Reached end of parser loop'); |
| 348 |
} |
| 349 |
|
| 350 |
protected function emitError(Error $error) { |
| 351 |
$this->errorHandler->handleError($error); |
| 352 |
} |
| 353 |
|
| 354 |
protected function getErrorMessage($symbol, $state) { |
| 355 |
$expectedString = ''; |
| 356 |
if ($expected = $this->getExpectedTokens($state)) { |
| 357 |
$expectedString = ', expecting ' . implode(' or ', $expected); |
| 358 |
} |
| 359 |
|
| 360 |
return 'Syntax error, unexpected ' . $this->symbolToName[$symbol] . $expectedString; |
| 361 |
} |
| 362 |
|
| 363 |
protected function getExpectedTokens($state) { |
| 364 |
$expected = array(); |
| 365 |
|
| 366 |
$base = $this->actionBase[$state]; |
| 367 |
foreach ($this->symbolToName as $symbol => $name) { |
| 368 |
$idx = $base + $symbol; |
| 369 |
if ($idx >= 0 && $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol |
| 370 |
|| $state < $this->YY2TBLSTATE |
| 371 |
&& ($idx = $this->actionBase[$state + $this->YYNLSTATES] + $symbol) >= 0 |
| 372 |
&& $idx < $this->actionTableSize && $this->actionCheck[$idx] === $symbol |
| 373 |
) { |
| 374 |
if ($this->action[$idx] != $this->unexpectedTokenRule |
| 375 |
&& $this->action[$idx] != $this->defaultAction |
| 376 |
&& $symbol != $this->errorSymbol |
| 377 |
) { |
| 378 |
if (count($expected) == 4) { |
| 379 |
/* Too many expected tokens */ |
| 380 |
return array(); |
| 381 |
} |
| 382 |
|
| 383 |
$expected[] = $name; |
| 384 |
} |
| 385 |
} |
| 386 |
} |
| 387 |
|
| 388 |
return $expected; |
| 389 |
} |
| 390 |
|
| 391 |
/* |
| 392 |
* Tracing functions used for debugging the parser. |
| 393 |
*/ |
| 394 |
|
| 395 |
/* |
| 396 |
protected function traceNewState($state, $symbol) { |
| 397 |
echo '% State ' . $state |
| 398 |
. ', Lookahead ' . ($symbol == self::SYMBOL_NONE ? '--none--' : $this->symbolToName[$symbol]) . "\n"; |
| 399 |
} |
| 400 |
|
| 401 |
protected function traceRead($symbol) { |
| 402 |
echo '% Reading ' . $this->symbolToName[$symbol] . "\n"; |
| 403 |
} |
| 404 |
|
| 405 |
protected function traceShift($symbol) { |
| 406 |
echo '% Shift ' . $this->symbolToName[$symbol] . "\n"; |
| 407 |
} |
| 408 |
|
| 409 |
protected function traceAccept() { |
| 410 |
echo "% Accepted.\n"; |
| 411 |
} |
| 412 |
|
| 413 |
protected function traceReduce($n) { |
| 414 |
echo '% Reduce by (' . $n . ') ' . $this->productions[$n] . "\n"; |
| 415 |
} |
| 416 |
|
| 417 |
protected function tracePop($state) { |
| 418 |
echo '% Recovering, uncovered state ' . $state . "\n"; |
| 419 |
} |
| 420 |
|
| 421 |
protected function traceDiscard($symbol) { |
| 422 |
echo '% Discard ' . $this->symbolToName[$symbol] . "\n"; |
| 423 |
} |
| 424 |
*/ |
| 425 |
|
| 426 |
/* |
| 427 |
* Helper functions invoked by semantic actions |
| 428 |
*/ |
| 429 |
|
| 430 |
/** |
| 431 |
* Moves statements of semicolon-style namespaces into $ns->stmts and checks various error conditions. |
| 432 |
* |
| 433 |
* @param Node[] $stmts |
| 434 |
* @return Node[] |
| 435 |
*/ |
| 436 |
protected function handleNamespaces(array $stmts) { |
| 437 |
$hasErrored = false; |
| 438 |
$style = $this->getNamespacingStyle($stmts); |
| 439 |
if (null === $style) { |
| 440 |
// not namespaced, nothing to do |
| 441 |
return $stmts; |
| 442 |
} elseif ('brace' === $style) { |
| 443 |
// For braced namespaces we only have to check that there are no invalid statements between the namespaces |
| 444 |
$afterFirstNamespace = false; |
| 445 |
foreach ($stmts as $stmt) { |
| 446 |
if ($stmt instanceof Node\Stmt\Namespace_) { |
| 447 |
$afterFirstNamespace = true; |
| 448 |
} elseif (!$stmt instanceof Node\Stmt\HaltCompiler |
| 449 |
&& !$stmt instanceof Node\Stmt\Nop |
| 450 |
&& $afterFirstNamespace && !$hasErrored) { |
| 451 |
$this->emitError(new Error( |
| 452 |
'No code may exist outside of namespace {}', $stmt->getAttributes())); |
| 453 |
$hasErrored = true; // Avoid one error for every statement |
| 454 |
} |
| 455 |
} |
| 456 |
return $stmts; |
| 457 |
} else { |
| 458 |
// For semicolon namespaces we have to move the statements after a namespace declaration into ->stmts |
| 459 |
$resultStmts = array(); |
| 460 |
$targetStmts =& $resultStmts; |
| 461 |
foreach ($stmts as $stmt) { |
| 462 |
if ($stmt instanceof Node\Stmt\Namespace_) { |
| 463 |
if ($stmt->stmts === null) { |
| 464 |
$stmt->stmts = array(); |
| 465 |
$targetStmts =& $stmt->stmts; |
| 466 |
$resultStmts[] = $stmt; |
| 467 |
} else { |
| 468 |
// This handles the invalid case of mixed style namespaces |
| 469 |
$resultStmts[] = $stmt; |
| 470 |
$targetStmts =& $resultStmts; |
| 471 |
} |
| 472 |
} elseif ($stmt instanceof Node\Stmt\HaltCompiler) { |
| 473 |
// __halt_compiler() is not moved into the namespace |
| 474 |
$resultStmts[] = $stmt; |
| 475 |
} else { |
| 476 |
$targetStmts[] = $stmt; |
| 477 |
} |
| 478 |
} |
| 479 |
return $resultStmts; |
| 480 |
} |
| 481 |
} |
| 482 |
|
| 483 |
private function getNamespacingStyle(array $stmts) { |
| 484 |
$style = null; |
| 485 |
$hasNotAllowedStmts = false; |
| 486 |
foreach ($stmts as $i => $stmt) { |
| 487 |
if ($stmt instanceof Node\Stmt\Namespace_) { |
| 488 |
$currentStyle = null === $stmt->stmts ? 'semicolon' : 'brace'; |
| 489 |
if (null === $style) { |
| 490 |
$style = $currentStyle; |
| 491 |
if ($hasNotAllowedStmts) { |
| 492 |
$this->emitError(new Error( |
| 493 |
'Namespace declaration statement has to be the very first statement in the script', |
| 494 |
$stmt->getLine() // Avoid marking the entire namespace as an error |
| 495 |
)); |
| 496 |
} |
| 497 |
} elseif ($style !== $currentStyle) { |
| 498 |
$this->emitError(new Error( |
| 499 |
'Cannot mix bracketed namespace declarations with unbracketed namespace declarations', |
| 500 |
$stmt->getLine() // Avoid marking the entire namespace as an error |
| 501 |
)); |
| 502 |
// Treat like semicolon style for namespace normalization |
| 503 |
return 'semicolon'; |
| 504 |
} |
| 505 |
continue; |
| 506 |
} |
| 507 |
|
| 508 |
/* declare(), __halt_compiler() and nops can be used before a namespace declaration */ |
| 509 |
if ($stmt instanceof Node\Stmt\Declare_ |
| 510 |
|| $stmt instanceof Node\Stmt\HaltCompiler |
| 511 |
|| $stmt instanceof Node\Stmt\Nop) { |
| 512 |
continue; |
| 513 |
} |
| 514 |
|
| 515 |
/* There may be a hashbang line at the very start of the file */ |
| 516 |
if ($i == 0 && $stmt instanceof Node\Stmt\InlineHTML && preg_match('/\A#!.*\r?\n\z/', $stmt->value)) { |
| 517 |
continue; |
| 518 |
} |
| 519 |
|
| 520 |
/* Everything else if forbidden before namespace declarations */ |
| 521 |
$hasNotAllowedStmts = true; |
| 522 |
} |
| 523 |
return $style; |
| 524 |
} |
| 525 |
|
| 526 |
protected function handleBuiltinTypes(Name $name) { |
| 527 |
$scalarTypes = [ |
| 528 |
'bool' => true, |
| 529 |
'int' => true, |
| 530 |
'float' => true, |
| 531 |
'string' => true, |
| 532 |
'iterable' => true, |
| 533 |
'void' => true, |
| 534 |
'object' => true, |
| 535 |
]; |
| 536 |
|
| 537 |
if (!$name->isUnqualified()) { |
| 538 |
return $name; |
| 539 |
} |
| 540 |
|
| 541 |
$lowerName = strtolower($name->toString()); |
| 542 |
return isset($scalarTypes[$lowerName]) ? $lowerName : $name; |
| 543 |
} |
| 544 |
|
| 545 |
protected static $specialNames = array( |
| 546 |
'self' => true, |
| 547 |
'parent' => true, |
| 548 |
'static' => true, |
| 549 |
); |
| 550 |
|
| 551 |
protected function getAttributesAt($pos) { |
| 552 |
return $this->startAttributeStack[$pos] + $this->endAttributeStack[$pos]; |
| 553 |
} |
| 554 |
|
| 555 |
protected function parseLNumber($str, $attributes, $allowInvalidOctal = false) { |
| 556 |
try { |
| 557 |
return LNumber::fromString($str, $attributes, $allowInvalidOctal); |
| 558 |
} catch (Error $error) { |
| 559 |
$this->emitError($error); |
| 560 |
// Use dummy value |
| 561 |
return new LNumber(0, $attributes); |
| 562 |
} |
| 563 |
} |
| 564 |
|
| 565 |
protected function parseNumString($str, $attributes) { |
| 566 |
if (!preg_match('/^(?:0|-?[1-9][0-9]*)$/', $str)) { |
| 567 |
return new String_($str, $attributes); |
| 568 |
} |
| 569 |
|
| 570 |
$num = +$str; |
| 571 |
if (!is_int($num)) { |
| 572 |
return new String_($str, $attributes); |
| 573 |
} |
| 574 |
|
| 575 |
return new LNumber($num, $attributes); |
| 576 |
} |
| 577 |
|
| 578 |
protected function checkModifier($a, $b, $modifierPos) { |
| 579 |
// Jumping through some hoops here because verifyModifier() is also used elsewhere |
| 580 |
try { |
| 581 |
Class_::verifyModifier($a, $b); |
| 582 |
} catch (Error $error) { |
| 583 |
$error->setAttributes($this->getAttributesAt($modifierPos)); |
| 584 |
$this->emitError($error); |
| 585 |
} |
| 586 |
} |
| 587 |
|
| 588 |
protected function checkParam(Param $node) { |
| 589 |
if ($node->variadic && null !== $node->default) { |
| 590 |
$this->emitError(new Error( |
| 591 |
'Variadic parameter cannot have a default value', |
| 592 |
$node->default->getAttributes() |
| 593 |
)); |
| 594 |
} |
| 595 |
} |
| 596 |
|
| 597 |
protected function checkTryCatch(TryCatch $node) { |
| 598 |
if (empty($node->catches) && null === $node->finally) { |
| 599 |
$this->emitError(new Error( |
| 600 |
'Cannot use try without catch or finally', $node->getAttributes() |
| 601 |
)); |
| 602 |
} |
| 603 |
} |
| 604 |
|
| 605 |
protected function checkNamespace(Namespace_ $node) { |
| 606 |
if (isset(self::$specialNames[strtolower($node->name)])) { |
| 607 |
$this->emitError(new Error( |
| 608 |
sprintf('Cannot use \'%s\' as namespace name', $node->name), |
| 609 |
$node->name->getAttributes() |
| 610 |
)); |
| 611 |
} |
| 612 |
|
| 613 |
if (null !== $node->stmts) { |
| 614 |
foreach ($node->stmts as $stmt) { |
| 615 |
if ($stmt instanceof Namespace_) { |
| 616 |
$this->emitError(new Error( |
| 617 |
'Namespace declarations cannot be nested', $stmt->getAttributes() |
| 618 |
)); |
| 619 |
} |
| 620 |
} |
| 621 |
} |
| 622 |
} |
| 623 |
|
| 624 |
protected function checkClass(Class_ $node, $namePos) { |
| 625 |
if (null !== $node->name && isset(self::$specialNames[strtolower($node->name)])) { |
| 626 |
$this->emitError(new Error( |
| 627 |
sprintf('Cannot use \'%s\' as class name as it is reserved', $node->name), |
| 628 |
$this->getAttributesAt($namePos) |
| 629 |
)); |
| 630 |
} |
| 631 |
|
| 632 |
if (isset(self::$specialNames[strtolower($node->extends)])) { |
| 633 |
$this->emitError(new Error( |
| 634 |
sprintf('Cannot use \'%s\' as class name as it is reserved', $node->extends), |
| 635 |
$node->extends->getAttributes() |
| 636 |
)); |
| 637 |
} |
| 638 |
|
| 639 |
foreach ($node->implements as $interface) { |
| 640 |
if (isset(self::$specialNames[strtolower($interface)])) { |
| 641 |
$this->emitError(new Error( |
| 642 |
sprintf('Cannot use \'%s\' as interface name as it is reserved', $interface), |
| 643 |
$interface->getAttributes() |
| 644 |
)); |
| 645 |
} |
| 646 |
} |
| 647 |
} |
| 648 |
|
| 649 |
protected function checkInterface(Interface_ $node, $namePos) { |
| 650 |
if (null !== $node->name && isset(self::$specialNames[strtolower($node->name)])) { |
| 651 |
$this->emitError(new Error( |
| 652 |
sprintf('Cannot use \'%s\' as class name as it is reserved', $node->name), |
| 653 |
$this->getAttributesAt($namePos) |
| 654 |
)); |
| 655 |
} |
| 656 |
|
| 657 |
foreach ($node->extends as $interface) { |
| 658 |
if (isset(self::$specialNames[strtolower($interface)])) { |
| 659 |
$this->emitError(new Error( |
| 660 |
sprintf('Cannot use \'%s\' as interface name as it is reserved', $interface), |
| 661 |
$interface->getAttributes() |
| 662 |
)); |
| 663 |
} |
| 664 |
} |
| 665 |
} |
| 666 |
|
| 667 |
protected function checkClassMethod(ClassMethod $node, $modifierPos) { |
| 668 |
if ($node->flags & Class_::MODIFIER_STATIC) { |
| 669 |
switch (strtolower($node->name)) { |
| 670 |
case '__construct': |
| 671 |
$this->emitError(new Error( |
| 672 |
sprintf('Constructor %s() cannot be static', $node->name), |
| 673 |
$this->getAttributesAt($modifierPos))); |
| 674 |
break; |
| 675 |
case '__destruct': |
| 676 |
$this->emitError(new Error( |
| 677 |
sprintf('Destructor %s() cannot be static', $node->name), |
| 678 |
$this->getAttributesAt($modifierPos))); |
| 679 |
break; |
| 680 |
case '__clone': |
| 681 |
$this->emitError(new Error( |
| 682 |
sprintf('Clone method %s() cannot be static', $node->name), |
| 683 |
$this->getAttributesAt($modifierPos))); |
| 684 |
break; |
| 685 |
} |
| 686 |
} |
| 687 |
} |
| 688 |
|
| 689 |
protected function checkClassConst(ClassConst $node, $modifierPos) { |
| 690 |
if ($node->flags & Class_::MODIFIER_STATIC) { |
| 691 |
$this->emitError(new Error( |
| 692 |
"Cannot use 'static' as constant modifier", |
| 693 |
$this->getAttributesAt($modifierPos))); |
| 694 |
} |
| 695 |
if ($node->flags & Class_::MODIFIER_ABSTRACT) { |
| 696 |
$this->emitError(new Error( |
| 697 |
"Cannot use 'abstract' as constant modifier", |
| 698 |
$this->getAttributesAt($modifierPos))); |
| 699 |
} |
| 700 |
if ($node->flags & Class_::MODIFIER_FINAL) { |
| 701 |
$this->emitError(new Error( |
| 702 |
"Cannot use 'final' as constant modifier", |
| 703 |
$this->getAttributesAt($modifierPos))); |
| 704 |
} |
| 705 |
} |
| 706 |
|
| 707 |
protected function checkProperty(Property $node, $modifierPos) { |
| 708 |
if ($node->flags & Class_::MODIFIER_ABSTRACT) { |
| 709 |
$this->emitError(new Error('Properties cannot be declared abstract', |
| 710 |
$this->getAttributesAt($modifierPos))); |
| 711 |
} |
| 712 |
|
| 713 |
if ($node->flags & Class_::MODIFIER_FINAL) { |
| 714 |
$this->emitError(new Error('Properties cannot be declared final', |
| 715 |
$this->getAttributesAt($modifierPos))); |
| 716 |
} |
| 717 |
} |
| 718 |
|
| 719 |
protected function checkUseUse(UseUse $node, $namePos) { |
| 720 |
if ('self' == strtolower($node->alias) || 'parent' == strtolower($node->alias)) { |
| 721 |
$this->emitError(new Error( |
| 722 |
sprintf( |
| 723 |
'Cannot use %s as %s because \'%2$s\' is a special class name', |
| 724 |
$node->name, $node->alias |
| 725 |
), |
| 726 |
$this->getAttributesAt($namePos) |
| 727 |
)); |
| 728 |
} |
| 729 |
} |
| 730 |
} |
| 731 |
|
