Hello Rust friends. Is it bad to implement Add and then use this boilerplate for AddAssign? impl AddAssign for Foo { fn add_assign(&mut self, rhs: Self) { *self = *self + rhs; } }
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zip would throw away the Some in the Some + None cases, right?
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TBH your match is probably more clear than any named function could be. I'd bet the context for what this is being used for is pretty helpful to understanding why this needs to do what it does
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The context is like this: let begin_at = combine_opt(self.begin_at, rhs.begin_at, std::cmp::min); let end_at = combine_opt(self.end_at, rhs.end_at, std::cmp::max);
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No worries. You could do it with an xor first but that wouldn't be very elegant, I think.
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lhs.xor(rhs).or(option::zip_with(lhs, rhs, f)) or some such
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