Re: [csswg-drafts] [css-values] specification for calc() should be clearer about when the result has a percentage (#10017)

An expression having a percent hint means that the expression only makes sense if percentages in that expression are the type of the percent hint.  For example, `calc(10px + 20%)` has a percent hint of `length` and a type of `«[ "length" → 1 ]»` (the type for `<length>`), while `calc((10px + 20%) / 15px)` still has a percent hint of `length` but it has a type of `«[ ]»` (the type  for `<number>`).

So if we don't check percent hints at all for values of type `<number>` then `calc((10px + 20%) / 15px)` would be accepted for any `<number>`, whereas it only really makes sense in a context that both (a) accepts `<number>` *and* (b) where percentages resolve to lengths.

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Received on Tuesday, 5 March 2024 14:43:39 UTC