PHP Token::isEmpty方法代码示例

 public function testIsEmpty()
 {
     $braceToken = $this->getBraceToken();
     $this->assertFalse($braceToken->isEmpty());
     $braceToken->setContent('');
     $this->assertTrue($braceToken->isEmpty());
     $whitespaceToken = new Token(array(T_WHITESPACE, ' '));
     $this->assertFalse($whitespaceToken->isEmpty());
     $whitespaceToken->setContent('');
     $this->assertTrue($whitespaceToken->isEmpty());
     $whitespaceToken->override(array(null, ''));
     $this->assertTrue($whitespaceToken->isEmpty());
     $whitespaceToken = new Token(array(T_WHITESPACE, ' '));
     $whitespaceToken->clear();
     $this->assertTrue($whitespaceToken->isEmpty());
 }

 /**
  * Find a sequence of meaningful tokens and returns the array of their locations.
  *
  * @param array      $sequence      an array of tokens (same format used by getNextTokenOfKind)
  * @param int        $start         start index, defaulting to the start of the file
  * @param int        $end           end index, defaulting to the end of the file
  * @param bool|array $caseSensitive global case sensitiveness or an array of booleans, whose keys should match
  *                                  the ones used in $others. If any is missing, the default case-sensitive
  *                                  comparison is used.
  *
  * @return array|null an array containing the tokens matching the sequence elements, indexed by their position
  */
 public function findSequence(array $sequence, $start = 0, $end = null, $caseSensitive = true)
 {
     // $end defaults to the end of the collection
     if (null === $end) {
         $end = count($this) - 1;
     }
     if (!count($sequence)) {
         throw new \InvalidArgumentException('Invalid sequence');
     }
     // make sure the sequence content is "meaningful"
     foreach ($sequence as $key => $token) {
         // if not a Token instance already, we convert it to verify the meaningfulness
         if (!$token instanceof Token) {
             if (is_array($token) && !isset($token[1])) {
                 // fake some content as it is required by the Token constructor,
                 // although optional for search purposes
                 $token[1] = '';
             }
             $token = new Token($token);
         }
         if ($token->isWhitespace() || $token->isComment() || $token->isEmpty()) {
             throw new \InvalidArgumentException(sprintf('Non-meaningful token at position: %s', $key));
         }
     }
     // remove the first token from the sequence, so we can freely iterate through the sequence after a match to
     // the first one is found
     $key = key($sequence);
     $firstCs = Token::isKeyCaseSensitive($caseSensitive, $key);
     $firstToken = $sequence[$key];
     unset($sequence[$key]);
     // begin searching for the first token in the sequence (start included)
     $index = $start - 1;
     while (null !== $index && $index <= $end) {
         $index = $this->getNextTokenOfKind($index, array($firstToken), $firstCs);
         // ensure we found a match and didn't get past the end index
         if (null === $index || $index > $end) {
             return;
         }
         // initialise the result array with the current index
         $result = array($index => $this[$index]);
         // advance cursor to the current position
         $currIdx = $index;
         // iterate through the remaining tokens in the sequence
         foreach ($sequence as $key => $token) {
             $currIdx = $this->getNextMeaningfulToken($currIdx);
             // ensure we didn't go too far
             if (null === $currIdx || $currIdx > $end) {
                 return;
             }
             if (!$this[$currIdx]->equals($token, Token::isKeyCaseSensitive($caseSensitive, $key))) {
                 // not a match, restart the outer loop
                 continue 2;
             }
             // append index to the result array
             $result[$currIdx] = $this[$currIdx];
         }
         // do we have a complete match?
         // hint: $result is bigger than $sequence since the first token has been removed from the latter
         if (count($sequence) < count($result)) {
             return $result;
         }
     }
 }

 public function findSequence(array $sequence, $start = 0, $end = null, $caseSensitive = true)
 {
     if (null === $end) {
         $end = count($this) - 1;
     }
     if (!count($sequence)) {
         throw new \InvalidArgumentException('Invalid sequence');
     }
     foreach ($sequence as $key => $token) {
         if (!$token instanceof Token) {
             if (is_array($token) && !isset($token[1])) {
                 $token[1] = '';
             }
             $token = new Token($token);
         }
         if ($token->isWhitespace() || $token->isComment() || $token->isEmpty()) {
             throw new \InvalidArgumentException(sprintf('Non-meaningful token at position: %s', $key));
         }
     }
     $key = key($sequence);
     $firstCs = Token::isKeyCaseSensitive($caseSensitive, $key);
     $firstToken = $sequence[$key];
     unset($sequence[$key]);
     $index = $start - 1;
     while (null !== $index && $index <= $end) {
         $index = $this->getNextTokenOfKind($index, array($firstToken), $firstCs);
         if (null === $index || $index > $end) {
             return;
         }
         $result = array($index => $this[$index]);
         $currIdx = $index;
         foreach ($sequence as $key => $token) {
             $currIdx = $this->getNextMeaningfulToken($currIdx);
             if (null === $currIdx || $currIdx > $end) {
                 return;
             }
             if (!$this[$currIdx]->equals($token, Token::isKeyCaseSensitive($caseSensitive, $key))) {
                 continue 2;
             }
             $result[$currIdx] = $this[$currIdx];
         }
         if (count($sequence) < count($result)) {
             return $result;
         }
     }
 }