#[lang = "sized"]
pub trait Sized {}

#[lang = "clone"]
pub trait Clone: Sized {
    fn clone(&self) -> Self;

    fn clone_from(&mut self, source: &Self) {
        *self = source.clone()
    }
}

mod impls {
    use super::Clone;

    macro_rules! impl_clone {
        ($($t:ty)*) => {
            $(
                impl Clone for $t {
                    fn clone(&self) -> Self {
                        *self
                    }
                }
            )*
        }
    }

    impl_clone! {
        usize u8 u16 u32 u64 // u128
        isize i8 i16 i32 i64 // i128
        f32 f64
        bool char
    }
}

#[lang = "copy"]
pub trait Copy: Clone {
    // Empty.
}

mod copy_impls {
    use super::Copy;

    macro_rules! impl_copy {
        ($($t:ty)*) => {
            $(
                impl Copy for $t {}
            )*
        }
    }

    impl_copy! {
        usize u8 u16 u32 u64 // u128
        isize i8 i16 i32 i64 // i128
        f32 f64
        bool char
    }
}

trait Foo
where
    Self: Sized,
{
    fn get(self) -> i32;

    fn test(self) -> i32 {
        self.get()
    }
}

struct Bar(i32);
impl Foo for Bar {
    fn get(self) -> i32 {
        self.0
    }
}

fn main() {
    let a;
    a = Bar(123);

    let b;
    b = Bar::get(a);

    let a;
    a = Bar(123);

    let b;
    b = a.test();
}