Trait TryFromTag

pub trait TryFromTag<T, Discriminant: DiscriminantTag = ()>: Sized {
    type Error;

    // Required method
    fn try_from_tag(t: T) -> Result<Self, Self::Error>;
}

Fallible version of FromTag.

Allows conversions that may fail, while still being disambiguated by a concrete discriminant.

Type Parameters

• T: Source type (may be generic or non-concrete).
• Discriminant: A concrete marker type used to disambiguate conversions.

Default Discriminant

• Discriminant = (): uses the unit type as a default tag, meaning no additional disambiguation when a single interpretation exists.

Required Associated Types

type Error

Required Methods

fn try_from_tag(t: T) -> Result<Self, Self::Error>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl TryFromTag<Vec<()>, ManyTag> for ()

Trivial Many conversion for unit (always succeeds).

type Error = Infallible

fn try_from_tag(_t: Vec<()>) -> Result<Self, Self::Error>

Implementors

impl<Type, S> TryFromTag<Vec<Type>, ManyTag> for SumDynType<Type, S>

where Type: Delimited, S: Get<u32> + Clone + Debug + 'static,

type Error = ()