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There's also the pattern used in from+into where one implementation is wrapped to provide its counterpart on the other type. Nice to read but feels a little ext
by hedgehog 5y ago
There's also the pattern used in from+into where one implementation is wrapped to provide its counterpart on the other type. Nice to read but feels a little extra magical for someone without a lot of Rust background.
- tialaramex 5y agoBlanket implementation is a very common idea in Rust. The standard library "owns" its own Traits and so it gets to provide blanket implementations for those, but you can do the same for your own. Here's (really, this is literally the code) how std provides a blanket implementation of Into given From: impl<T, U> Into<U> for T where U: From<T>, { fn into(self) -> U { U::from(self) } } There's actually a chain, From implies Into, Into implies TryFrom, then TryFrom implies TryInto.