Trait TryInto
try_from
pub trait TryInto<T>: Sized { type Err; fn try_into(self) -> Result<T, Self::Err>; }
type Err
fn try_into(self) -> Result<T, Self::Err>
impl<T, U> TryInto<U> for T where U: TryFrom<T>,
type Err = U::Err
fn try_into(self) -> Result<U, U::Err>