/**
* ConditionalPrimary ::= SimpleConditionalExpression | "(" ConditionalExpression ")"
* @todo Implementation incomplete: Recognition of SimpleConditionalExpression is incomplete.
*/
public function _ConditionalPrimary()
{
$condPrimary = new AST\ConditionalPrimary();
if ($this->_lexer->isNextToken('(')) {
// Peek beyond the matching closing paranthesis ')'
$numUnmatched = 1;
$peek = $this->_lexer->peek();
while ($numUnmatched > 0) {
if ($peek['value'] == ')') {
--$numUnmatched;
} else {
if ($peek['value'] == '(') {
++$numUnmatched;
}
}
$peek = $this->_lexer->peek();
}
$this->_lexer->resetPeek();
//TODO: This is not complete, what about LIKE/BETWEEN/...etc?
$comparisonOps = array("=", "<", "<=", "<>", ">", ">=", "!=");
if (in_array($peek['value'], $comparisonOps)) {
$condPrimary->setSimpleConditionalExpression($this->_SimpleConditionalExpression());
} else {
$this->match('(');
$conditionalExpression = $this->_ConditionalExpression();
$this->match(')');
$condPrimary->setConditionalExpression($conditionalExpression);
}
} else {
$condPrimary->setSimpleConditionalExpression($this->_SimpleConditionalExpression());
}
return $condPrimary;
}
