/**
* Parse unary operator (- ,not)
*
* @return AbstractExpression
*/
private function _parseUnary()
{
$this->_recurseEnter();
if ($this->_getCurrentToken()->Id == ExpressionTokenId::MINUS || $this->_getCurrentToken()->identifierIs(ODataConstants::KEYWORD_NOT)) {
$op = clone $this->_getCurrentToken();
$this->_lexer->nextToken();
if ($op->Id == ExpressionTokenId::MINUS && ExpressionLexer::isNumeric($this->_getCurrentToken()->Id)) {
$numberLiteral = $this->_getCurrentToken();
$numberLiteral->Text = '-' . $numberLiteral->Text;
$numberLiteral->Position = $op->Position;
$v = $this->_getCurrentToken();
$this->_setCurrentToken($numberLiteral);
$this->_recurseLeave();
return $this->_parsePrimary();
}
$expr = $this->_parsePrimary();
FunctionDescription::validateUnaryOpArguments($op, $expr);
if ($op->Id == ExpressionTokenId::MINUS) {
$expr = new UnaryExpression($expr, ExpressionType::NEGATE, $expr->getType());
} else {
$expr = new UnaryExpression($expr, ExpressionType::NOT_LOGICAL, new Boolean());
}
$this->_recurseLeave();
return $expr;
}
$this->_recurseLeave();
return $this->_parsePrimary();
}
/**
* Checks whether this token is a valid token for a key value.
*
* @return boolean True if this token represent valid key value
* False otherwise.
*/
public function isKeyValueToken()
{
return $this->Id == ExpressionTokenId::BINARY_LITERAL || $this->Id == ExpressionTokenId::BOOLEAN_LITERAL || $this->Id == ExpressionTokenId::DATETIME_LITERAL || $this->Id == ExpressionTokenId::GUID_LITERAL || $this->Id == ExpressionTokenId::STRING_LITERAL || ExpressionLexer::isNumeric($this->Id);
}