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[REBOL] Re: Compose on tag! values

From: nitsch-lists:netcologne at: 16-Oct-2003 0:51

Am Mittwoch, 15. Oktober 2003 22:33 schrieb Andrew Martin:
> What do people think about extending 'compose to work within tag! > values? For example: > > paragraph_colour: "green" > compose [ > <p style="Color: (paragraph_colour);"> > ] > which results in: > [ > <p style="Color: green;"> > ] > > Comments, criticism, witticisms? :) >
Something similar was suggested by Carl a while ago. He wanted to process perl-based templates, which mark their variables with "$". IIRC he thought about a native. Gabriele posted a parse-based prototype. I think its usefull. aboids a lot clutter. The idea of integrating it in compose is interesting. Carl mentions somewhere how cool 'repend is for html-building. integrating tag-expansions could be even better. my personal favorite favorite function gets its replace-arguments explicitely, so one would write subst[ #PG paragraph_color ] [ <p style="Color:($PG;"> ] which i find more readable. (shows me which variables are hidden in the html) source: subst: func [vars string] [ string: copy string foreach [var val] reduce vars [ replace/all string join "$" var val ] string ] has a bug with subst[#a "$b" #b "demo"] {this is a $a} == "this is a demo" instead of {this is a $b}, but works otherwise. recently i discovered i like to create c-style code with rebol. C has all this {} which fit very well with rebols strings. so c-code can be pasted in rebol-source without problems, then the $..-values are replaced. subst[#what "world]{ int main(){ printf("Hello $what"); } } works then :)
> Andrew J Martin