It's funny seeing people from Ruby rave about how good Rust's error messages are when I know 1000 ways to make it give garbage errors (and I'm running into all of them today). When they're good, they're *really* good, but when they're bad they're... Actually not any worse than rb
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This is actually 100% wrong. The hypothetical impl that I mention would always violate the orphan rule. Rust can 100% always say that the first impl doesn't apply. I have no clue why it doesn't use that knowledge.
My "I want the opposite of `#[fundamental]`" thing is still useful, but it would apply on traits not types (a local type in as a type parameter to a trait *is* considered local)