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use super::{FromRequest, RequestParts}; use crate::response::IntoResponse; use async_trait::async_trait; use http::Response; use std::convert::Infallible; #[async_trait] impl<B> FromRequest<B> for () where B: Send, { type Rejection = Infallible; async fn from_request(_: &mut RequestParts<B>) -> Result<(), Self::Rejection> { Ok(()) } } macro_rules! impl_from_request { () => { }; ( $head:ident, $($tail:ident),* $(,)? ) => { #[async_trait] #[allow(non_snake_case)] impl<B, $head, $($tail,)*> FromRequest<B> for ($head, $($tail,)*) where $head: FromRequest<B> + Send, $( $tail: FromRequest<B> + Send, )* B: Send, { type Rejection = Response<crate::body::Body>; async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> { let $head = $head::from_request(req).await.map_err(IntoResponse::into_response)?; $( let $tail = $tail::from_request(req).await.map_err(IntoResponse::into_response)?; )* Ok(($head, $($tail,)*)) } } impl_from_request!($($tail,)*); }; } impl_from_request!(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16);