Function finchers_http::path::param

pub fn param<T>() -> Param<T> where
    T: FromSegment + Send, 

Create an endpoint which extracts one segment from the path and converts it to the value of T.

If the segments is empty of the conversion to T is failed, this endpoint will skip the request.

Example

let endpoint = param()
    .map_ok(|id: i32| format!("id={}", id))
    .unwrap_ok();

Custom handling for the conversion error:

let endpoint = param()
    .map_err(|_| BadRequest::new("invalid id"))
    .unwrap_ok()
    .as_t::<i32>();