Trait OrElseHelper 

pub trait OrElseHelper<'db>: Sized {
    // Required method
    fn map_because(
        self,
        f: impl 'db + Clone + Fn(Because<'db>) -> Because<'db>,
    ) -> impl OrElse<'db>;
}

Required Methods

fn map_because( self, f: impl 'db + Clone + Fn(Because<'db>) -> Because<'db>, ) -> impl OrElse<'db>

Create a new OrElse that just maps the Because value and propagates to an underlying or-else. This is used when an operating like subtyping delegates to sub-operations: the suboperation will provide a Because value and then the subtyping can provide additional context, but the high-level ‘or-else’ is left unchanged.

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.

Implementors

impl<'db> OrElseHelper<'db> for &dyn OrElse<'db>