- From: Michael Dyck <jmdyck@ibiblio.org>
- Date: Sun, 25 Jan 2004 23:05:50 -0800
- To: www-ql@w3.org
TAN Kuan Hui wrote:
>
> Hi,
>
> I am puzzled as to why the "else" clause must be made mandatory
> in the IfExpr ? Aside from plausible grammar ambiguity which IMO can
> be easily resolved, the production should not make "else" mandatory
> in every ifExpr.
>
> [54] IfExpr ::= <"if" "("> Expr ")" "then" ExprSingle "else"
> ExprSingle
>
> It seems that the above is deliberate by design, would appreciate any
> clarifications.
How would you resolve the ambiguity?
-Michael Dyck
Received on Monday, 26 January 2004 02:09:07 UTC