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pub trait Primitive: Copy + NumCast + Num + PartialOrd<Self> + Clone + Bounded { }
Primitive trait from old stdlib
impl Primitive for usize
impl Primitive for u8
impl Primitive for u16
impl Primitive for u32
impl Primitive for u64
impl Primitive for isize
impl Primitive for i8
impl Primitive for i16
impl Primitive for i32
impl Primitive for i64
impl Primitive for f32
impl Primitive for f64