mirror of https://github.com/fafhrd91/actix-web
improve doc
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Arniu
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#![recursion_limit = "512"]
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//! Helper and convenience macros for Actix-web.
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//!
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//! ## Runtime Setup
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//!
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//! - [main](attr.main.html)
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//!
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//! ## Resource Macros:
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//!
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//! - [get](attr.get.html)
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//! - [post](attr.post.html)
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//! - [put](attr.put.html)
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//! - [delete](attr.delete.html)
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//! - [head](attr.head.html)
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//! - [connect](attr.connect.html)
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//! - [options](attr.options.html)
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//! - [trace](attr.trace.html)
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//! - [patch](attr.patch.html)
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//! - [route](attr.route.html)
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//!
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//! ### Attributes:
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//!
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//! - `"path"` - *Required*, raw literal string with path for which to register handle
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//! - `method="HTTP_METHOD"` - Secondary HTTP method accepted, uppercased string. "GET", "POST" for example
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//! - `guard="function_name"` - Registers function as guard using `actix_web::guard::fn_guard`
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//! - `wrap="Middleware"` - Registers a resource middleware.
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//!
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//! ### Notes
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//!
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//! Function name can be specified as any expression that is going to be accessible to the generate
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//! code (e.g `my_guard` or `my_module::my_guard`)
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//!
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//! ### Example:
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//!
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//! ```rust
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//! use actix_web::HttpResponse;
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//! use actix_web_codegen::get;
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//!
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//! #[get("/test")]
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//! async fn async_test() -> Result<HttpResponse, actix_web::Error> {
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//! Ok(HttpResponse::Ok().finish())
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//! }
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//! ```
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extern crate proc_macro;
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mod route;
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use proc_macro::TokenStream;
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mod route;
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/// Creates resource handler, allowing multiple HTTP method guards.
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///
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/// Syntax: `#[route("path"[, attributes])]`
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/// ## Syntax
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///
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/// Example: `#[route("/", method="GET", method="HEAD")]`
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/// #[route("path", method="HTTP_METHOD"[, attributes])]
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///
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/// ## Attributes
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///
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/// - `"path"` - Raw literal string with path for which to register handler. Mandatory.
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/// - `method="HTTP_METHOD"` - Registers HTTP method to provide guard for.
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/// ### Attributes
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/// - `"path"` - Raw literal string with path for which to register handler.
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/// - `method="HTTP_METHOD"` - Registers HTTP method to provide guard for. Upper-case string, "GET", "POST" for example.
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/// - `guard="function_name"` - Registers function as guard using `actix_web::guard::fn_guard`
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/// - `wrap="Middleware"` - Registers a resource middleware.
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///
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/// ### Notes
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/// Function name can be specified as any expression that is going to be accessible to the generate
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/// code, e.g `my_guard` or `my_module::my_guard`.
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///
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/// ## Example
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///
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/// ```rust
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/// use actix_web::HttpResponse;
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/// use actix_web_codegen::route;
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///
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/// #[route("/", method="GET", method="HEAD")]
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/// fn async example() -> HttpResponse {
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/// Ok(HttpResponse::Ok().finish())
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/// }
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/// ```
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#[proc_macro_attribute]
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pub fn route(args: TokenStream, input: TokenStream) -> TokenStream {
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route::with_method(None, args, input)
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}
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macro_rules! doc_comment {
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($($x:expr)*; $($tt:tt)*) => {
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$(#[doc = $x])*
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($x:expr; $($tt:tt)*) => {
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#[doc = $x]
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$($tt)*
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};
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}
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macro_rules! method_macro {
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(
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$(
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($method:ident, $variant:ident, $upper:ident);
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)+
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$($variant:ident, $method:ident,)+
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) => {
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$(
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doc_comment! {
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concat!("Creates route handler with `", stringify!($upper), "` method guard.")
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concat!("")
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concat!("Syntax: `#[", stringify!($method), "(\"path\" [, attributes])]`")
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concat!("")
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concat!("## Attributes:")
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concat!("")
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concat!("- `\"path\"` - *required* Raw literal string with path for which to register handler")
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concat!("- `guard = \"function_name\"` - Register function as guard using `actix_web::guard::fn_guard`")
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concat!("- `wrap = \"Middleware\"` - Register a resource middleware.");
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$(doc_comment! {
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concat!("
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Creates route handler with `actix_web::guard::", stringify!($variant), "`.
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## Syntax
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#[", stringify!($method), r#"("path"[, attributes])]
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### Attributes
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- `"path"` - Raw literal string with path for which to register handler.
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- `guard="function_name"` - Registers function as guard using `actix_web::guard::fn_guard`.
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- `wrap="Middleware"` - Registers a resource middleware.
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### Notes
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Function name can be specified as any expression that is going to be accessible to the generate
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code, e.g `my_guard` or `my_module::my_guard`.
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## Example
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```rust
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use actix_web::HttpResponse;
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use actix_web_codegen::"#, stringify!($method), ";
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#[", stringify!($method), r#"("/")]
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fn async example() -> HttpResponse {
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Ok(HttpResponse::Ok().finish())
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}
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```
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"#);
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#[proc_macro_attribute]
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pub fn $method(args: TokenStream, input: TokenStream) -> TokenStream {
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route::with_method(Some(route::MethodType::$variant), args, input)
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}
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}
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)+
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})+
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};
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}
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method_macro! {
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(get, Get, GET);
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(post, Post, POST);
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(put, Put, PUT);
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(delete, Delete, DELETE);
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(head, Head, HEAD);
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(connect, Connect, CONNECT);
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(options, Options, OPTIONS);
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(trace, Trace, TRACE);
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(patch, Patch, PATCH);
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Get, get,
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Post, post,
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Put, put,
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Delete, delete,
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Head, head,
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Connect, connect,
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Options, options,
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Trace, trace,
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Patch, patch,
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}
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/// Marks async main function as the actix system entry-point.
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@ -22,9 +22,7 @@ impl ToTokens for ResourceType {
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macro_rules! method_type {
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(
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$(
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($variant:ident, $upper:ident);
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)+
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$($variant:ident, $upper:ident,)+
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) => {
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#[derive(Debug, PartialEq, Eq, Hash)]
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pub enum MethodType {
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@ -51,15 +49,15 @@ macro_rules! method_type {
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}
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method_type! {
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(Get, GET);
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(Post, POST);
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(Put, PUT);
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(Delete, DELETE);
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(Head, HEAD);
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(Connect, CONNECT);
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(Options, OPTIONS);
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(Trace, TRACE);
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(Patch, PATCH);
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Get, GET,
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Post, POST,
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Put, PUT,
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Delete, DELETE,
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Head, HEAD,
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Connect, CONNECT,
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Options, OPTIONS,
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Trace, TRACE,
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Patch, PATCH,
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}
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impl ToTokens for MethodType {
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