//<expr-rel>//
public Node ExprRel()
{
var addOne = ExprAdd();
var xprRel = addOne;
while (firstOfExprRel.Contains(CurrentToken))
{
switch (CurrentToken)
{
case TokenCategory.LESS_THAN:
xprRel = new LessThan()
{
AnchorToken = Expect(TokenCategory.LESS_THAN)
};
break;
case TokenCategory.LESS_THAN_OR_EQUAL_TO:
xprRel = new LessThanOrEqual()
{
AnchorToken = Expect(TokenCategory.LESS_THAN_OR_EQUAL_TO)
};
break;
case TokenCategory.GREATER_THAN:
xprRel = new GreaterThan()
{
AnchorToken = Expect(TokenCategory.GREATER_THAN)
};
break;
case TokenCategory.GREATER_THAN_OR_EQUAL_TO:
xprRel = new GreaterThanOrEqual()
{
AnchorToken = Expect(TokenCategory.GREATER_THAN_OR_EQUAL_TO)
};
break;
default:
throw new SyntaxError(firstOfExprRel,
tokenStream.Current);
}
xprRel.Add(addOne);
xprRel.Add(ExprAdd());
addOne = xprRel;
}
return(xprRel);
}
