[josephg]

Again, can you provide an example or two? Its hard to agree or disagree without an example.

I think all C++ wild template stuff can be done via proc macros. Eg, in rust you can add #[derive(Serialize, Deserialize)] to have a highly performant JSON parser & serializer. And thats just lovely. But I might be wrong? And maybe its ugly? Its hard to tell without real examples.

[tick_tock_tick]

Rust doesn't allow specialization and likely never will because it's unsound https://www.reddit.com/r/rust/comments/1p346th/specializatio... has a couple of nice comments about it.

But yes it's basically

template <typename T, size_t N> class Example { vector<T> generic; };

template<> class Example<int32_t, 32> { int bitpackinhere; }

[steveklabnik]

Specialization isn’t stable in Rust, but is possible with C++ templates. It’s used in the standard library for performance reasons. But it’s not clear if it’ll ever land for users.