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Simplify macros for implementing Handler and FromRequest (#340)

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Makes the generated docs nicer and avoids having a recursive macro.
This commit is contained in:
David Pedersen
2021-09-19 15:51:25 +00:00
committed by GitHub
parent 0b9e0c7508
commit 48401f2c8d
2 changed files with 45 additions and 31 deletions
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src/extract/tuple.rs
+21 -11
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@@ -20,29 +20,39 @@ where
}
macro_rules! impl_from_request {
() => {
};
() => {};
( $head:ident, $($tail:ident),* $(,)? ) => {
( $($ty:ident),* $(,)? ) => {
#[async_trait]
#[allow(non_snake_case)]
impl<B, $head, $($tail,)*> FromRequest<B> for ($head, $($tail,)*)
impl<B, $($ty,)*> FromRequest<B> for ($($ty,)*)
where
$head: FromRequest<B> + Send,
$( $tail: FromRequest<B> + Send, )*
$( $ty: FromRequest<B> + Send, )*
B: Send,
{
type Rejection = Response<BoxBody>;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
let $head = $head::from_request(req).await.map_err(|err| err.into_response().map(box_body))?;
$( let $tail = $tail::from_request(req).await.map_err(|err| err.into_response().map(box_body))?; )*
Ok(($head, $($tail,)*))
$( let $ty = $ty::from_request(req).await.map_err(|err| err.into_response().map(box_body))?; )*
Ok(($($ty,)*))
}
}
impl_from_request!($($tail,)*);
};
}
impl_from_request!(T1);
impl_from_request!(T1, T2);
impl_from_request!(T1, T2, T3);
impl_from_request!(T1, T2, T3, T4);
impl_from_request!(T1, T2, T3, T4, T5);
impl_from_request!(T1, T2, T3, T4, T5, T6);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15);
impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16);