| use std::marker::PhantomData; | |
| use anyhow::Result; | |
| use crate::{RawVc, Vc}; | |
| /// Trait to implement in order for a type to be accepted as a | |
| /// `turbo_tasks::function` return type. | |
| pub trait TaskOutput: Send { | |
| type Return: ?Sized; | |
| fn try_from_raw_vc(raw_vc: RawVc) -> Vc<Self::Return> { | |
| Vc { | |
| node: raw_vc, | |
| _t: PhantomData, | |
| } | |
| } | |
| fn try_into_raw_vc(self) -> Result<RawVc>; | |
| } | |
| impl<T> TaskOutput for Vc<T> | |
| where | |
| T: Send + ?Sized, | |
| { | |
| type Return = T; | |
| fn try_into_raw_vc(self) -> Result<RawVc> { | |
| Ok(self.node) | |
| } | |
| } | |
| impl TaskOutput for () { | |
| type Return = (); | |
| fn try_into_raw_vc(self) -> Result<RawVc> { | |
| let unit = Vc::<()>::default(); | |
| Ok(unit.node) | |
| } | |
| } | |
| impl<T> TaskOutput for Result<T> | |
| where | |
| T: TaskOutput, | |
| { | |
| type Return = T::Return; | |
| fn try_into_raw_vc(self) -> Result<RawVc> { | |
| self?.try_into_raw_vc() | |
| } | |
| } | |