Gets the next token. Skips any irrelevant token (whitespaces and
comments).
|
public getNext ( ) : |
||
| return | ||
public function testGetNext()
{
$list = new TokensList($this->tokens);
$this->assertEquals($this->tokens[0], $list->getNext());
$this->assertEquals($this->tokens[2], $list->getNext());
$this->assertEquals($this->tokens[4], $list->getNext());
$this->assertEquals($this->tokens[6], $list->getNext());
$this->assertEquals(null, $list->getNext());
}
/**
* @param Parser $parser The parser that serves as context.
* @param TokensList $list The list of tokens that are being parsed.
* @param array $options Parameters for parsing.
*
* @return PartitionDefinition
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = new PartitionDefinition();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -------------[ PARTITION | SUBPARTITION ]------------> 1
*
* 1 -----------------------[ name ]----------------------> 2
*
* 2 ----------------------[ VALUES ]---------------------> 3
*
* 3 ---------------------[ LESS THAN ]-------------------> 4
* 3 ------------------------[ IN ]-----------------------> 4
*
* 4 -----------------------[ expr ]----------------------> 5
*
* 5 ----------------------[ options ]--------------------> 6
*
* 6 ------------------[ subpartitions ]------------------> (END)
*
* @var int $state
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
// Skipping whitespaces and comments.
if ($token->type === Token::TYPE_WHITESPACE || $token->type === Token::TYPE_COMMENT) {
continue;
}
if ($state === 0) {
$ret->isSubpartition = $token->type === Token::TYPE_KEYWORD && $token->value === 'SUBPARTITION';
$state = 1;
} elseif ($state === 1) {
$ret->name = $token->value;
// Looking ahead for a 'VALUES' keyword.
$idx = $list->idx;
$list->getNext();
$nextToken = $list->getNext();
$list->idx = $idx;
$state = $nextToken->type === Token::TYPE_KEYWORD && $nextToken->value === 'VALUES' ? 2 : 5;
} elseif ($state === 2) {
$state = 3;
} elseif ($state === 3) {
$ret->type = $token->value;
$state = 4;
} elseif ($state === 4) {
if ($token->value === 'MAXVALUE') {
$ret->expr = $token->value;
} else {
$ret->expr = Expression::parse($parser, $list, array('parenthesesDelimited' => true, 'breakOnAlias' => true));
}
$state = 5;
} elseif ($state === 5) {
$ret->options = OptionsArray::parse($parser, $list, static::$OPTIONS);
$state = 6;
} elseif ($state === 6) {
if ($token->type === Token::TYPE_OPERATOR && $token->value === '(') {
$ret->subpartitions = ArrayObj::parse($parser, $list, array('type' => 'SqlParser\\Components\\PartitionDefinition'));
++$list->idx;
}
break;
}
}
--$list->idx;
return $ret;
}
