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Re: [xsl] Functional programming in XSLT (revised)
Subject: Re: [xsl] Functional programming in XSLT (revised) From: Alexey Gokhberg <alexei@xxxxxxxxxx> Date: Fri, 16 Mar 2001 17:43:13 +0100 |
Michael Kay wrote: > > Alexey: > > > The <fxsl:function> declarations are allowed at any place, where > > > <xsl:variable> declarations are allowed. In particular, function > > > declarations can be top-level or local to a template. > > > Jeni: > > I was thinking about this after reading your last proposal - local > > function declarations in the same way as you get local variables. I > > quite like it (it has a symmetry) but I couldn't think of why I'd ever > > need it. > > > > If you'd never used a language with local variables, you'd wonder why you > ever need them. Once you've used a language with local functions, you spend > the rest of your life cursing languages that only offer global functions. > > Having said that, I made saxon:function available at the top-level only, > because I didn't want to spend the rest of my life explaining the concept of > local functions, and juistifying why they should have access to local > variables declared outside the function body. > > Mike Kay > Software AG Take it easy. Long ago, in the dark ages, I was involved in implementing a LISP interpreter. Of course, I told to all my FORTRAN-using friends, how wonderful are embedded functions with local variables, and why the normal programming is not possible without them. Just a bit later I started with C language, and I told to all my PASCAL-using friends how useless are those embedded functions with local variables, and why ... All that, however, did not make me unhappy for the rest of my life. Alexey Gokhberg XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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