[rust-dev] "Virtual fn" is a bad idea
oren at ben-kiki.org
Tue Mar 11 14:30:29 PDT 2014
I can't help but feel that forcing the "single inheritance of fast field
access" and "inheritance of trait functions" into one mechanism would be
Would https://github.com/mozilla/rust/issues/10491 address all the
requirements? If not, why?
On Tue, Mar 11, 2014 at 10:52 PM, Brian Anderson <banderson at mozilla.com>wrote:
> The downsides you list are all more or less applicable to this design,
> indeed. We are seeing real requirements in real code that indicates that
> the current abstraction facilities provided by Rust are efficient enough
> for certain demanding use cases (the DOM in particular).
> Here are the identified requirements:
> tree of types (single inheritance)
> thin pointers
> cheap field access
> easy upcasting
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