#[derive(All)]

language design
20

Maybe duplicated to this thread

It should be better to just have a

#[derive(Copy, Ord)]
struct Foo;

rather than

#[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord)]
struct Foo;

Actually we could auto implement higher trait for lower traits. In case we have Ord, we should have Eq and PartialOrd automatically.

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