Subject: Re: Designs for XSLT functions (Was: Re: [xsl] RE: syntax sugar for call-template) From: Uche Ogbuji <uche.ogbuji@xxxxxxxxxxxxxxx> Date: Tue, 20 Feb 2001 15:49:04 -0700 |
> Hi Uche, > > > > No, it doesn't. However, in languages where you otherwise have > > > side effects (like C) you have to think extra carefully about the > > > evaluation order. > > > > My exact point is that an exsl:if function as you describe above *does* > > introduce an order-of-execution side effect. That is why if an exsl:ternary > > is debated, I would vote that all arguments must be evaluated regardless of > > the value of the selector. > > Well, now that you have made your own definition of the term "side effect" > your statement holds true. However, I've never come across a defintion > even close to yours before :-) This is rather unfair given that the definition of the term is ever quite broad. > It's crucial that the conditional operator only evaluates one of it's clauses. > Otherwise you could not use it for recursive functions. I see your point, but it only makes me think that exsl:if is in general otiose and dangerous. I'd still advocate just sticking to xsl:if for such cases. In particular, I would not support a use-case which had exsl:ternary() as the decision fulcrum of a recursive function. > Also you would > need that behaviour particulary when one of the claues had a side effect > (using the more common definition :-). It sounds as if we misunderstand each other again. You and I apparently have this problem. No great matter. I will be supporting regular XSLT flow-of control constructs for exsl:function. I suppose you'll be pushing for exsl:if(). Nothing wrong with disagreement. -- Uche Ogbuji Principal Consultant uche.ogbuji@xxxxxxxxxxxxxxx +1 303 583 9900 x 101 Fourthought, Inc. http://Fourthought.com 4735 East Walnut St, Ste. C, Boulder, CO 80301-2537, USA Software-engineering, knowledge-management, XML, CORBA, Linux, Python XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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