private ISearchExpression ParseOrOperator()
{
ISearchExpression c = this.ParseAndOperator();
while (this.token == TokenType.Or)
{
this.MoveNext();
c = new LogicalExpression(c, this.ParseAndOperator(), LogicalOperator.Or);
}
return c;
}
private ISearchExpression ParseComplexExpression()
{
ISearchExpression expression = null;
switch (this.token)
{
case TokenType.LeftParenthesis:
this.MoveNext();
ISearchExpression c = this.ParseOrOperator();
this.AssertTokenType(TokenType.RightParenthesis);
expression = c;
break;
case TokenType.Not:
this.MoveNext();
expression = new LogicalExpression(this.ParseComplexExpression(), null, LogicalOperator.Not);
break;
default:
expression = ParseSimpleExpression();
break;
}
return expression;
}