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#![no_std]

use core::{any::type_name, convert::TryFrom, fmt::Debug};

pub trait AssertInto<T>: Sized {
    fn assert_into(self) -> T;
}

impl<T, U> AssertInto<U> for T
where
    U: TryFrom<T>,
    T: Debug,
    T: Copy,
    <U as TryFrom<T>>::Error: Debug,
{
    #[inline]
    #[track_caller]
    fn assert_into(self) -> U {
        U::try_from(self).unwrap_or_else(|err| {
            panic!(
                "{:?} is out of range for type {} ({:?})",
                self,
                type_name::<U>(),
                err
            );
        })
    }
}