rust-lang/rust-clippy
在 GitHub 查看New lint: Use `Into`/`TryInto` in bounds as opposed to `From`/`TryFrom`
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#4,894 建立於 2019年12月10日
A-lintL-stylegood first issue
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描述
When writing generic bounds such as:
fn foo<T>(a: T) where u32: From<T>;
Into should be preferred, like this:
fn foo<T>(a: T) where T: Into<u32>;
Why the former is bad: Into is a superset of From. In some cases coherence rules prevent implementing From but do allow implementing Into. As a result Into is more generic bound than From.
Category: Style, I guess?