INNER CODE UNIT · Rust

try_from

trussed-dev/trussed · src/backend.rs:93

    fn try_from(_: u8) -> Result<Self, Self::Error> {
        Err(Error::InternalError)
    }
}

/// Helper type for optional backends.
///
/// If the backend is `None`, [`Error::RequestNotAvailable`][] is returned.
#[derive(Debug)]
pub struct OptionalBackend<T>(Option<T>);

impl<T> OptionalBackend<T> {
    /// Crates a new optional backend from an `Option<T>`.
    pub fn new(backend: Option<T>) -> Self {
        Self(backend)
    }

    /// Returns a mutable reference to the wrapped backend or [`Error::RequestNotAvailable`][] if

View source record →