cgp_error/traits/
can_raise_error.rs

1use cgp_component::{DelegateComponent, HasComponents, UseDelegate};
2use cgp_component_macro::cgp_component;
3
4use crate::traits::has_error_type::HasErrorType;
5
6/**
7   Used for injecting external error types into [`Self::Error`](HasErrorType::Error).
8
9   As an example, if `Context: CanRaiseError<ParseIntError>`, then we would be
10   able to call `Context::raise_error(err)` for an error value
11   [`err: ParseIntError`](core::num::ParseIntError) and get back
12   a [`Context::Error`](HasErrorType::Error) value.
13*/
14#[cgp_component {
15    provider: ErrorRaiser
16}]
17pub trait CanRaiseError<SourceError>: HasErrorType {
18    fn raise_error(error: SourceError) -> Self::Error;
19}
20
21impl<Context, SourceError, Components, Delegate> ErrorRaiser<Context, SourceError>
22    for UseDelegate<Components>
23where
24    Context: HasErrorType,
25    Components: DelegateComponent<SourceError, Delegate = Delegate>,
26    Delegate: ErrorRaiser<Context, SourceError>,
27{
28    fn raise_error(e: SourceError) -> Context::Error {
29        Delegate::raise_error(e)
30    }
31}