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Add doc example showing query parameter extraction #291

merged 1 commit into from Jul 18, 2019
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@@ -14,6 +14,23 @@ use serde::Deserialize;
use tide_core::{error::Error, Context};

/// An extension trait for `Context`, providing query string deserialization.
/// # Example
/// Turning the query parameters into a `HashMap`:
/// ```
/// #![feature(async_await)]
/// # use std::collections::HashMap;
/// use tide::querystring::ContextExt;
/// let mut app = tide::App::new();
///"/").get(|cx: tide::Context<()>| async move {
/// let map: HashMap<String, String> = cx.url_query().unwrap();
/// format!("{:?}", map)
/// });
/// ```
pub trait ContextExt<'de> {
/// Analyze url and extract query parameters
fn url_query<T: Deserialize<'de>>(&'de self) -> Result<T, Error>;