> On May 23, 2015, at 14:35, Tab Atkins Jr. <jackalmage@gmail.com> wrote: > > There is a huge difference between an infinite loop in a normal > programming language, like JS, and a cycle in a declarative > programming language, like CSS. The former just has annoying > behavior; the latter is *undefined*. There are other declarative languages that do allow cycles. Excel for one [1]. Excel’s model of resolving them is suboptimal — apparently it checks for convergence for a certain number of iterations, which is slow and I would definitely not suggest we do the same. However, allowing cycles in declarative languages is not all that unheard of. > Cycle checkers are expensive, and so we want to minimize their use. > Currently we limit the checking to just custom properties, which > limits their cost. Last time I checked, cycle checkers were O(N). I might be missing something here, but linear complexity is hardly what I’d call “expensive”… ~Lea [1]: http://www.jkp-ads.com/articles/circularreferences00.aspReceived on Saturday, 23 May 2015 20:27:40 UTC
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