Trait UniKind 

pub trait UniKind:
    Debug
    + Any
    + Send
    + Sync {
    // Provided methods
    fn value(&self) -> Cow<'static, str> { ... }
    fn context(&self) -> Option<Cow<'static, str>> { ... }
    fn code(&self) -> i32 { ... }
    fn type_name(&self) -> &'static str { ... }
}

A trait that specifies a custom error kind. Any specified to facilitate downcasting.

Provided Methods

fn value(&self) -> Cow<'static, str>

The string value of the kind, if any. This is useful for programmatic evaluation when the type is boxed in the error chain and the type is not known. Defaults to "".

fn context(&self) -> Option<Cow<'static, str>>

Returns additional context for this specific kind, if any. Defaults to None.

fn code(&self) -> i32

Returns the code (typically for FFI) for this specific kind. Defaults to -1.

fn type_name(&self) -> &'static str

Returns the concrete type name.

Implementations

impl dyn UniKind

pub fn downcast_ref<T: UniKind>(&self) -> Option<&T>

Attempts to downcast a UniKind to a specific concrete type.

Implementations on Foreign Types

impl UniKind for ()

Implementors