/**
* @param StreamInterface $stream
* @param string|null $parentPass
*
* @return Stream
*/
public function parseStream(StreamInterface $stream, $parentPass = null)
{
$result = array();
$used = array();
while ($token = $stream->next()) {
if ($stream->cursor() < 1 || !$token instanceof TokenInterface) {
$result[] = $token;
continue;
}
// Looking for `*-*` pattern
if ($token->is('T_MINUS') && $stream->readAt(-1) instanceof TokenInterface && $stream->readAt(1) instanceof TokenInterface && !in_array($stream->cursor() - 1, $used) && $this->isPreviousNextTokenValid($stream->readAt(-1), $stream->readAt(1), $parentPass)) {
// Remove *
array_pop($result);
$used[] = $stream->cursor();
$used[] = $stream->cursor() - 1;
$used[] = $stream->cursor() + 1;
$result[] = new CharacterClassNode(new TokenNode($stream->readAt(-1)), new TokenNode($stream->readAt(1)));
$stream->next();
} else {
$result[] = $token;
}
}
unset($stream);
return new Stream($result);
}
/**
* @param StreamInterface $stream
* @param string|null $parentPass
*
* @throws ParserException
*
* @return Stream
*/
public function parseStream(StreamInterface $stream, $parentPass = null)
{
$commentFound = false;
$stack = array();
$result = array();
while ($token = $stream->next()) {
if ($stream->cursor() < 2 || !$token instanceof TokenInterface) {
$result[] = $token;
continue;
}
// Looking for `(?#` pattern
if ($token->is('T_POUND') && $stream->readAt(-1)->is('T_QUESTION') && $stream->readAt(-2)->is('T_LEFT_PARENTHESIS') && !$commentFound) {
$commentFound = true;
// We remove (? from result
array_pop($result);
array_pop($result);
} elseif ($commentFound && $token->is('T_RIGHT_PARENTHESIS')) {
// $stack contains our comment but we don't keep it
$commentFound = false;
$stack = array();
} elseif ($commentFound) {
$stack[] = $token;
} else {
$result[] = $token;
}
}
if ($commentFound) {
throw new ParserException('Comment not closed');
}
unset($stream);
return new Stream($result);
}
/**
* @param StreamInterface $stream
* @param string|null $parentPass
*
* @throws ParserException
*
* @return Stream
*/
public function parseStream(StreamInterface $stream, $parentPass = null)
{
$result = array();
while ($token = $stream->next()) {
if (!$token instanceof TokenInterface) {
$result[] = $token;
continue;
}
// Looking for `*-*` pattern
if ($token->is('T_PIPE')) {
if ($stream->cursor() < 1 || !$stream->hasNext()) {
throw new ParserException('Alternative must have a previous and a next token');
}
if ($result[count($result) - 1] instanceof AlternativeNode) {
if ($stream->readAt(1) instanceof TokenInterface) {
$result[count($result) - 1]->appendChild(new TokenNode($stream->next()));
} else {
$result[count($result) - 1]->appendChild($stream->next());
}
continue;
}
// Remove previous
array_pop($result);
$previous = $stream->readAt(-1);
if ($previous instanceof TokenInterface) {
$previous = new TokenNode($previous);
}
$next = $stream->next();
if ($next instanceof TokenInterface) {
$next = new TokenNode($next);
}
$result[] = new AlternativeNode(array($previous, $next));
} else {
$result[] = $token;
}
}
unset($stream);
return new Stream($result);
}
/**
* @param StreamInterface $stream
* @param string|null $parentPass
*
* @return Stream
*/
public function parseStream(StreamInterface $stream, $parentPass = null)
{
$result = array();
while ($token = $stream->next()) {
if (!$token instanceof TokenInterface) {
$result[] = $token;
continue;
}
// Looking for `^` pattern
if ($token->is('T_HAT') && $stream->cursor() === 0) {
if ($parentPass === 'BracketBlockParserPass') {
$childNodes = $stream->input();
array_shift($childNodes);
// Remove ^
return new Stream(array(new ExclusionNode($this->parser->parseStream(new Stream($childNodes), 'BracketBlockParserPass', array('BracketBlockParserPass'))->input())));
}
$result[] = new BeginNode($this->parser->parseStream(new Stream(array($stream->next())))->input());
} else {
$result[] = $token;
}
}
unset($stream);
return new Stream($result);
}
/**
* @param StreamInterface $stream
* @param string|null $parentPass
*
* @throws ParserException
*
* @return Stream
*/
public function parseStream(StreamInterface $stream, $parentPass = null)
{
$blockFound = false;
$stack = array(0 => array(), 1 => array());
$step = 0;
$result = array();
while ($token = $stream->next()) {
if (!$token instanceof TokenInterface) {
$result[] = $token;
continue;
}
// Looking for `*` pattern
if ($token->is('T_MULTIPLY')) {
if ($stream->cursor() < 1) {
throw new ParserException('A repetition pattern must follow a token');
}
// We remove the last token
array_pop($result);
$child = $stream->readAt(-1);
if ($child instanceof TokenInterface) {
$child = new TokenNode($child);
}
$result[] = new RepetitionNode(0, null, array($child));
// We reinject the current node into the stream to handle case like +? and so on...
$stream->replace($stream->cursor(), $result[count($result) - 1]);
} elseif ($token->is('T_PLUS')) {
// Looking for `+` pattern
if ($stream->cursor() < 1) {
throw new ParserException('A repetition pattern must follow a token');
}
// We remove the last token
array_pop($result);
$child = $stream->readAt(-1);
if ($child instanceof TokenInterface) {
$child = new TokenNode($child);
}
$result[] = new RepetitionNode(1, null, array($child));
// We reinject the current node into the stream to handle case like +? and so on...
$stream->replace($stream->cursor(), $result[count($result) - 1]);
} elseif ($token->is('T_QUESTION')) {
// Looking for `?` pattern
if ($stream->cursor() < 1) {
throw new ParserException('A repetition pattern must follow a token');
}
// We remove the last token
array_pop($result);
$child = $stream->readAt(-1);
if ($child instanceof TokenInterface) {
$child = new TokenNode($child);
}
$result[] = new RepetitionNode(0, 1, array($child));
// We reinject the current node into the stream to handle case like +? and so on...
$stream->replace($stream->cursor(), $result[count($result) - 1]);
} elseif ($token->is('T_LEFT_BRACE')) {
if ($stream->cursor() < 1) {
throw new ParserException('A repetition pattern must follow a token');
}
$blockFound = true;
} elseif ($blockFound && $token->is('T_INTEGER')) {
$stack[$step][] = $token;
} elseif ($blockFound && $step === 0 && $token->is('T_COMMA')) {
++$step;
} elseif ($blockFound && $token->is('T_RIGHT_BRACE')) {
$blockFound = false;
array_pop($result);
$min = (int) implode('', array_map(function ($t) {
return $t->getValue();
}, $stack[0]));
if (count($stack[1]) > 0) {
$max = (int) implode('', array_map(function ($t) {
return $t->getValue();
}, $stack[1]));
if ($max !== null && $min >= $max) {
throw new ParserException('Min must be greater than max in a repetition pattern');
}
$offset = 3;
// +3 because of {,}
} else {
$max = $min;
$offset = 2;
// +3 because of {}
}
$child = $stream->readAt(-(count($stack[0]) + count($stack[1]) + $offset));
if ($child instanceof TokenInterface) {
$child = new TokenNode($child);
}
$result[] = new RepetitionNode($min, $max, array($child));
$stack = array(0 => array(), 1 => array());
$step = 0;
// We reinject the current node into the stream to handle case like +? and so on...
$stream->replace($stream->cursor(), $result[count($result) - 1]);
} elseif ($blockFound) {
throw new ParserException('Invalid token in repetition pattern');
} else {
$result[] = $token;
}
}
unset($stream);
return new Stream($result);
}