roadster 0.9.0-alpha.5

A "Batteries Included" web framework for rust designed to get you moving fast.
Documentation 
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/// A placeholder that implements various traits so it can be used as the default for various type
/// parameters
#[derive(Debug)]
pub struct Empty;

// Note: Unfortunately, this can't be implemented for any `impl App` because of a loop in the
// type resolution logic. So, just implement for the concrete `RoadsterApp` for now. If Rust's
// logic is ever updated to allow this type resolution loop, then we can add an `A: App` type
// parameter to implement for any `impl App`.
#[cfg(feature = "cli")]
#[async_trait::async_trait]
impl<S> crate::api::cli::RunCommand<crate::app::RoadsterApp<S, Empty>, S> for Empty
where
    S: 'static + Send + Sync + Clone,
    crate::app::context::AppContext: axum_core::extract::FromRef<S>,
{
    type Error = std::convert::Infallible;
    async fn run(
        &self,
        _prepared_app: &crate::api::cli::CliState<crate::app::RoadsterApp<S, Empty>, S>,
    ) -> Result<bool, Self::Error> {
        Ok(false)
    }
}

#[cfg(feature = "cli")]
impl clap::Args for Empty {
    fn augment_args(cmd: clap::Command) -> clap::Command {
        cmd
    }

    fn augment_args_for_update(cmd: clap::Command) -> clap::Command {
        cmd
    }
}

#[cfg(feature = "cli")]
impl clap::FromArgMatches for Empty {
    fn from_arg_matches(_matches: &clap::ArgMatches) -> Result<Self, clap::Error> {
        Ok(Empty)
    }

    fn update_from_arg_matches(&mut self, _matches: &clap::ArgMatches) -> Result<(), clap::Error> {
        Ok(())
    }
}

#[cfg(feature = "db-diesel-postgres-pool-async")]
impl
    bb8::CustomizeConnection<
        crate::db::DieselPgConnAsync,
        diesel_async::pooled_connection::PoolError,
    > for Empty
{
}

#[cfg(feature = "db-diesel-mysql-pool-async")]
impl
    bb8::CustomizeConnection<
        crate::db::DieselMysqlConnAsync,
        diesel_async::pooled_connection::PoolError,
    > for Empty
{
}