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Implement statically required resources

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Diggory Blake 2023-08-03 19:56:48 +01:00
parent 3d7c0bed49
commit a5395a5d33
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9 changed files with 195 additions and 56 deletions
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9
src/async_constructible.rs
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@ -1,6 +1,7 @@
use std::{any::Any, sync::Arc};
use async_trait::async_trait;
use frunk::prelude::HList;
use crate::{
resource::{unwrap_constructed, Resource},
@ -111,14 +112,14 @@ impl_async_constructible! {
pub trait AsyncConstructibleResource: Resource + IndirectlyAsyncConstructible {}
impl<T: Resource + IndirectlyAsyncConstructible> AsyncConstructibleResource for T {}
impl Aerosol {
impl<R: HList> Aerosol<R> {
/// Try to get or construct an instance of `T` asynchronously. Requires feature `async`.
pub async fn try_obtain_async<T: AsyncConstructibleResource>(&self) -> Result<T, T::Error> {
match self.try_get_slot() {
Some(SlotDesc::Filled(x)) => Ok(x),
Some(SlotDesc::Placeholder) | None => match self.wait_for_slot_async::<T>(true).await {
Some(x) => Ok(x),
None => match T::construct_async(self).await {
None => match T::construct_async(self.as_ref()).await {
Ok(x) => {
self.fill_placeholder::<T>(x.clone());
Ok(x)
@ -139,7 +140,7 @@ impl Aerosol {
pub async fn try_init_async<T: AsyncConstructibleResource>(&self) -> Result<(), T::Error> {
match self.wait_for_slot_async::<T>(true).await {
Some(_) => Ok(()),
None => match T::construct_async(self).await {
None => match T::construct_async(self.as_ref()).await {
Ok(x) => {
self.fill_placeholder::<T>(x);
Ok(())
@ -340,6 +341,6 @@ mod tests {
async fn obtain_impl() {
let state = Aerosol::new();
state.init_async::<Arc<DummyImpl>>().await;
state.get_async::<Arc<dyn DummyTrait>>().await;
state.try_get_async::<Arc<dyn DummyTrait>>().await.unwrap();
}
}