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A comment on The Serde Rust Framework. Parent comment

Re:The Serde Rust Framework by codeflo on Friday October 15, 2021 @09:22AM (#28877409)
In my observation, the Rust community is very hesitant to use dynamic dispatch, even where it wouldn't hurt performance (true for most things that involve I/O) and would dramatically reduce compile times.

I'm not sure why. The fact that Rust makes dyn traits significantly more verbose doesn't help, of course, but that can't be the only reason.

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Re:The Serde Rust Framework by the_duke on Saturday October 16, 2021 @01:13AM (#28885714)
Writing `dyn` in front of types doesn't really make a difference, it's only a little bit of added verbosity.

The main problem is that trait objects are very limited.

There is no downcasting or upcasting (eg C++ dynamic_cast) and trait objects are limited to a single trait. You can't have `Box<dyn A + B>`.

That leads to lots of headaches in practice.

I hear downcasting might be on the horizon, so that's something to look forward to.

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