public Node ExprRel()
{
var node = ExprAdd();
while (firstOfExprRel.Contains(CurrentToken))
{
switch (CurrentToken)
{
case TokenCategory.LESS:
var node_less = new Less();
node_less.AnchorToken = Expect(TokenCategory.LESS);
node_less.Add(node);
node_less.Add(ExprAdd());
node = node_less;
break;
case TokenCategory.LESSEQUAL:
var node_ltet = new LessThanOrEqualTo();
node_ltet.AnchorToken = Expect(TokenCategory.LESSEQUAL);
node_ltet.Add(node);
node_ltet.Add(ExprAdd());
node = node_ltet;
break;
case TokenCategory.GREATER:
var node_gt = new GreaterThan();
node_gt.AnchorToken = Expect(TokenCategory.GREATER);
node_gt.Add(node);
node_gt.Add(ExprAdd());
node = node_gt;
break;
case TokenCategory.GREATEREQUAL:
var node_gtet = new GreaterThanOrEqualTo();
node_gtet.AnchorToken = Expect(TokenCategory.GREATEREQUAL);
node_gtet.Add(node);
node_gtet.Add(ExprAdd());
node = node_gtet;
break;
default:
throw new SyntaxError(firstOfExprRel, tokenStream.Current);
}
}
return(node);
}