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// TODO: documentation
pub trait NumLike: std::ops::Add<Output=Self>
+ std::ops::Sub<Output=Self>
+ std::ops::Mul<Output=Self>
+ std::ops::Div<Output=Self>
+ Sized
{}
impl<T> NumLike for T where T: std::ops::Add<Output=Self>
+ std::ops::Sub<Output=Self>
+ std::ops::Mul<Output=Self>
+ std::ops::Div<Output=Self>
+ Sized
{}