Rename '#[error]' to '#[catch]', 'errors!' to 'catchers!'.

codegen/src/decorators/catch.rs

@@ -1,5 +1,5 @@
 use ::{CATCH_STRUCT_PREFIX, CATCH_FN_PREFIX, CATCHER_ATTR};
-use parser::ErrorParams;
+use parser::CatchParams;
 use utils::*;
 
 use syntax::codemap::{Span};
@@ -11,21 +11,21 @@ use syntax::parse::token;
 const ERR_PARAM: &'static str = "__err";
 const REQ_PARAM: &'static str = "__req";
 
-trait ErrorGenerateExt {
+trait CatchGenerateExt {
     fn generate_fn_arguments(&self, &ExtCtxt, Ident, Ident) -> Vec<TokenTree>;
 }
 
-impl ErrorGenerateExt for ErrorParams {
+impl CatchGenerateExt for CatchParams {
     fn generate_fn_arguments(&self, ecx: &ExtCtxt, err: Ident, req: Ident)
             -> Vec<TokenTree> {
-        let arg_help = "error handlers can take either a `rocket::Error` or \
+        let arg_help = "error catchers can take either a `rocket::Error`, \
                       `rocket::Request` type, or both.";
 
         // Retrieve the params from the user's handler and check the number.
         let input_args = &self.annotated_fn.decl().inputs;
         if input_args.len() > 2 {
             let sp = self.annotated_fn.span();
-            ecx.struct_span_err(sp, "error handlers can have at most 2 arguments")
+            ecx.struct_span_err(sp, "error catchers can have at most 2 arguments")
                 .help(arg_help).emit()
         }
 
@@ -35,8 +35,10 @@ impl ErrorGenerateExt for ErrorParams {
                 TyKind::Rptr(..) => Some(req),
                 TyKind::Path(..) => Some(err),
                 _ => {
-                    ecx.struct_span_err(ty.span, "unexpected error handler argument")
+                    ecx.struct_span_err(ty.span, "unknown error catcher argument")
-                        .help(arg_help).emit();
+                        .help(arg_help)
+                        .emit();
+
                     None
                 }
             }
@@ -46,24 +48,24 @@ impl ErrorGenerateExt for ErrorParams {
     }
 }
 
-pub fn error_decorator(ecx: &mut ExtCtxt,
+pub fn catch_decorator(
-                       sp: Span,
+    ecx: &mut ExtCtxt,
-                       meta_item: &MetaItem,
+    sp: Span,
-                       annotated: Annotatable)
+    meta_item: &MetaItem,
-    -> Vec<Annotatable>
+    annotated: Annotatable
-{
+) -> Vec<Annotatable> {
     let mut output = Vec::new();
 
-    // Parse the parameters from the error annotation.
+    // Parse the parameters from the `catch` annotation.
-    let error = ErrorParams::from(ecx, sp, meta_item, &annotated);
+    let catch = CatchParams::from(ecx, sp, meta_item, &annotated);
 
     // Get all of the information we learned from the attribute + function.
-    let user_fn_name = error.annotated_fn.ident();
+    let user_fn_name = catch.annotated_fn.ident();
     let catch_fn_name = user_fn_name.prepend(CATCH_FN_PREFIX);
-    let code = error.code.node;
+    let code = catch.code.node;
     let err_ident = Ident::from_str(ERR_PARAM);
     let req_ident = Ident::from_str(REQ_PARAM);
-    let fn_arguments = error.generate_fn_arguments(ecx, err_ident, req_ident);
+    let fn_arguments = catch.generate_fn_arguments(ecx, err_ident, req_ident);
 
     // Push the Rocket generated catch function.
     emit_item(&mut output, quote_item!(ecx,
@@ -78,7 +80,7 @@ pub fn error_decorator(ecx: &mut ExtCtxt,
         }
     ).expect("catch function"));
 
-    // Push the static catch info. This is what the errors! macro refers to.
+    // Push the static catch info. This is what the `catchers!` macro refers to.
     let struct_name = user_fn_name.prepend(CATCH_STRUCT_PREFIX);
     emit_item(&mut output, quote_item!(ecx,
         #[allow(non_upper_case_globals)]

codegen/src/decorators/mod.rs

@@ -1,8 +1,8 @@
 mod route;
-mod error;
+mod catch;
 mod derive_form;
 
 pub use self::route::*;
-pub use self::error::*;
+pub use self::catch::*;
 pub use self::derive_form::*;
 

codegen/src/lib.rs

@@ -17,7 +17,7 @@
 //!   * **head**
 //!   * **patch**
 //!   * **options**
-//!   * **error**
+//!   * **catch**
 //!
 //! The grammar for all _route_ attributes, including **route**, **get**,
 //! **put**, **post**, **delete**, **head**, **patch**, and **options** is
@@ -53,15 +53,15 @@
 //!
 //!     #[get("/hello")]
 //!
-//! The syntax for the **error** attribute is:
+//! The syntax for the **catch** attribute is:
 //!
 //! <pre>
-//! error := INTEGER
+//! catch := INTEGER
 //! </pre>
 //!
-//! A use of the `error` attribute looks like:
+//! A use of the `catch` attribute looks like:
 //!
-//!     #[error(404)]
+//!     #[catch(404)]
 //!
 //! ## Custom Derives
 //!
@@ -115,10 +115,10 @@
 //! This crate implements the following procedural macros:
 //!
 //!   * **routes**
-//!   * **errors**
+//!   * **catchers**
 //!   * **uri**
 //!
-//! The syntax for `routes!` and `errors!` is defined as:
+//! The syntax for `routes!` and `catchers!` is defined as:
 //!
 //! <pre>
 //! macro := PATH (',' PATH)*
@@ -283,7 +283,7 @@ pub fn plugin_registrar(reg: &mut Registry) {
 
     register_macros!(reg,
         "routes" => routes,
-        "errors" => errors,
+        "catchers" => catchers,
         "uri" => uri,
         "rocket_internal_uri" => uri_internal
     );
@@ -293,7 +293,7 @@ pub fn plugin_registrar(reg: &mut Registry) {
     );
 
     register_decorators!(reg,
-        "error" => error_decorator,
+        "catch" => catch_decorator,
         "route" => route_decorator,
         "get" => get_decorator,
         "put" => put_decorator,

codegen/src/macros/mod.rs

@@ -64,7 +64,7 @@ pub fn routes(ecx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
 }
 
 #[rustfmt_skip]
-pub fn errors(ecx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
+pub fn catchers(ecx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
         -> Box<MacResult + 'static> {
     prefixing_vec_macro(CATCH_STRUCT_PREFIX, |ecx, path| {
         quote_expr!(ecx, rocket::Catcher::from(&$path))

codegen/src/parser/catch.rs

@@ -7,13 +7,13 @@ use rocket::http::Status;
 use utils::{span, MetaItemExt};
 use super::Function;
 
-/// This structure represents the parsed `error` attribute.
+/// This structure represents the parsed `catch` attribute.
-pub struct ErrorParams {
+pub struct CatchParams {
     pub annotated_fn: Function,
     pub code: Spanned<u16>,
 }
 
-impl ErrorParams {
+impl CatchParams {
     /// Parses the route attribute from the given decorator context. If the
     /// parse is not successful, this function exits early with the appropriate
     /// error message to the user.
@@ -21,7 +21,7 @@ impl ErrorParams {
                 sp: Span,
                 meta_item: &MetaItem,
                 annotated: &Annotatable)
-                -> ErrorParams {
+                -> CatchParams {
         let function = Function::from(annotated).unwrap_or_else(|item_sp| {
             ecx.span_err(sp, "this attribute can only be used on functions...");
             ecx.span_fatal(item_sp, "...but was applied to the item above.");
@@ -40,7 +40,7 @@ impl ErrorParams {
             ecx.span_fatal(sp, "attribute can only have one `code` parameter");
         }
 
-        ErrorParams {
+        CatchParams {
             annotated_fn: function,
             code: parse_code(ecx, &meta_items[0])
         }
@@ -74,8 +74,8 @@ fn parse_code(ecx: &ExtCtxt, meta_item: &NestedMetaItem) -> Spanned<u16> {
     } else {
         ecx.struct_span_err(sp, r#"expected `code = int` or an integer literal"#)
             .help(r#"you can specify the code directly as an integer,
-                  e.g: #[error(404)], or as a key-value pair,
+                  e.g: #[catch(404)], or as a key-value pair,
-                  e.g: $[error(code = 404)]"#)
+                  e.g: $[catch(code = 404)]"#)
             .emit();
     }
 

codegen/src/parser/mod.rs

@@ -1,6 +1,6 @@
 mod keyvalue;
 mod route;
-mod error;
+mod catch;
 mod param;
 mod function;
 mod uri;
@@ -8,7 +8,7 @@ mod uri_macro;
 
 pub use self::keyvalue::KVSpanned;
 pub use self::route::RouteParams;
-pub use self::error::ErrorParams;
+pub use self::catch::CatchParams;
 pub use self::param::Param;
 pub use self::function::Function;
 pub use self::uri_macro::{Args, InternalUriParams, UriParams, Validation};

codegen/tests/error-handler.rs

@@ -5,19 +5,19 @@ extern crate rocket;
 
 use rocket::{Error, Request};
 
-#[error(404)]
+#[catch(404)]
 fn err0() -> &'static str { "hi" }
 
-#[error(404)]
+#[catch(404)]
 fn err1a(_err: Error) -> &'static str { "hi" }
 
-#[error(404)]
+#[catch(404)]
 fn err1b(_req: &Request) -> &'static str { "hi" }
 
-#[error(404)]
+#[catch(404)]
 fn err2a(_err: Error, _req: &Request) -> &'static str { "hi" }
 
-#[error(404)]
+#[catch(404)]
 fn err2b<'a>(_err: Error, _req: &'a Request) -> &'a str { "hi" }
 
 #[test]

codegen/tests/ui/bad-error-fn.rs

@@ -5,14 +5,8 @@ extern crate rocket;
 
 use rocket::{Error, Request};
 
-#[error(404)]
+#[catch(404)]
 fn err_a(_a: Error, _b: Request, _c: Error) -> &'static str { "hi" }
-//~^ ERROR: can have at most 2
 
-#[error(404)]
+#[catch(404)]
 fn err_b(_a: (isize, usize)) -> &'static str { "hi" }
-//~^ ERROR: unexpected error handler argument
-
-fn main() {
-}
-

codegen/tests/ui/bad-error-fn.stderr

@@ -0,0 +1,18 @@
+error: error catchers can have at most 2 arguments
+ --> $DIR/bad-error-fn.rs:9:1
+  |
+9 | fn err_a(_a: Error, _b: Request, _c: Error) -> &'static str { "hi" }
+  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  |
+  = help: error catchers can take either a `rocket::Error`, `rocket::Request` type, or both.
+
+error: unknown error catcher argument
+  --> $DIR/bad-error-fn.rs:12:14
+   |
+12 | fn err_b(_a: (isize, usize)) -> &'static str { "hi" }
+   |              ^^^^^^^^^^^^^^
+   |
+   = help: error catchers can take either a `rocket::Error`, `rocket::Request` type, or both.
+
+error: aborting due to 2 previous errors
+

examples/content_types/src/main.rs

@@ -35,7 +35,7 @@ fn post_hello(age: u8, name: String) -> content::Json<String> {
     content::Json(serde_json::to_string(&person).unwrap())
 }
 
-#[error(404)]
+#[catch(404)]
 fn not_found(request: &Request) -> content::Html<String> {
     let html = match request.format() {
         Some(ref mt) if !mt.is_json() && !mt.is_plain() => {
@@ -52,6 +52,6 @@ fn not_found(request: &Request) -> content::Html<String> {
 fn main() {
     rocket::ignite()
         .mount("/hello", routes![get_hello, post_hello])
-        .catch(errors![not_found])
+        .catch(catchers![not_found])
         .launch();
 }

examples/content_types/src/tests.rs

@@ -9,7 +9,7 @@ fn test<H>(method: Method, uri: &str, header: H, status: Status, body: String)
 {
     let rocket = rocket::ignite()
         .mount("/hello", routes![super::get_hello, super::post_hello])
-        .catch(errors![super::not_found]);
+        .catch(catchers![super::not_found]);
 
     let client = Client::new(rocket).unwrap();
     let mut response = client.req(method, uri).header(header).dispatch();

examples/errors/src/main.rs

@@ -12,7 +12,7 @@ fn hello(name: String, age: i8) -> String {
     format!("Hello, {} year old named {}!", age, name)
 }
 
-#[error(404)]
+#[catch(404)]
 fn not_found(req: &rocket::Request) -> content::Html<String> {
     content::Html(format!("<p>Sorry, but '{}' is not a valid path!</p>
             <p>Try visiting /hello/&lt;name&gt;/&lt;age&gt; instead.</p>",
@@ -23,7 +23,7 @@ fn main() {
     let e = rocket::ignite()
         // .mount("/", routes![hello, hello]) // uncoment this to get an error
         .mount("/", routes![hello])
-        .catch(errors![not_found])
+        .catch(catchers![not_found])
         .launch();
 
     println!("Whoops! Rocket didn't launch!");

examples/errors/src/tests.rs

@@ -5,7 +5,7 @@ use rocket::http::Status;
 fn test(uri: &str, status: Status, body: String) {
     let rocket = rocket::ignite()
         .mount("/", routes![super::hello])
-        .catch(errors![super::not_found]);
+        .catch(catchers![super::not_found]);
 
     let client = Client::new(rocket).unwrap();
     let mut response = client.get(uri).dispatch();

examples/handlebars_templates/src/main.rs

@@ -32,7 +32,7 @@ fn get(name: String) -> Template {
     Template::render("index", &context)
 }
 
-#[error(404)]
+#[catch(404)]
 fn not_found(req: &Request) -> Template {
     let mut map = std::collections::HashMap::new();
     map.insert("path", req.uri().as_str());
@@ -43,7 +43,7 @@ fn rocket() -> rocket::Rocket {
     rocket::ignite()
         .mount("/", routes![index, get])
         .attach(Template::fairing())
-        .catch(errors![not_found])
+        .catch(catchers![not_found])
 }
 
 fn main() {

examples/json/src/main.rs

@@ -61,7 +61,7 @@ fn get(id: ID, map: State<MessageMap>) -> Option<Json<Message>> {
     })
 }
 
-#[error(404)]
+#[catch(404)]
 fn not_found() -> JsonValue {
     json!({
         "status": "error",
@@ -72,7 +72,7 @@ fn not_found() -> JsonValue {
 fn rocket() -> rocket::Rocket {
     rocket::ignite()
         .mount("/message", routes![new, update, get])
-        .catch(errors![not_found])
+        .catch(catchers![not_found])
         .manage(Mutex::new(HashMap::<ID, String>::new()))
 }
 

lib/src/catcher.rs

@@ -32,7 +32,7 @@ use yansi::Color::*;
 /// # Code Generation
 ///
 /// Catchers should rarely be used directly. Instead, they are typically
-/// declared using the `error` decorator, as follows:
+/// declared using the `catch` decorator, as follows:
 ///
 /// ```rust
 /// #![feature(plugin, decl_macro)]
@@ -42,24 +42,24 @@ use yansi::Color::*;
 ///
 /// use rocket::Request;
 ///
-/// #[error(500)]
+/// #[catch(500)]
 /// fn internal_error() -> &'static str {
 ///     "Whoops! Looks like we messed up."
 /// }
 ///
-/// #[error(400)]
+/// #[catch(400)]
 /// fn not_found(req: &Request) -> String {
 ///     format!("I couldn't find '{}'. Try something else?", req.uri())
 /// }
 ///
 /// fn main() {
 /// # if false { // We don't actually want to launch the server in an example.
-///     rocket::ignite().catch(errors![internal_error, not_found]).launch();
+///     rocket::ignite().catch(catchers![internal_error, not_found]).launch();
 /// # }
 /// }
 /// ```
 ///
-/// A function decorated with `error` can take in 0, 1, or 2 parameters:
+/// A function decorated with `catch` can take in 0, 1, or 2 parameters:
 /// `Error`, `&Request`, or both, as desired.
 pub struct Catcher {
     /// The HTTP status code to match against.
@@ -150,7 +150,7 @@ macro_rules! error_page_template {
     )
 }
 
-macro_rules! default_errors {
+macro_rules! default_catchers {
     ($($code:expr, $name:expr, $description:expr, $fn_name:ident),+) => (
         let mut map = HashMap::new();
 
@@ -179,7 +179,7 @@ pub mod defaults {
     use error::Error;
 
     pub fn get() -> HashMap<u16, Catcher> {
-        default_errors! {
+        default_catchers! {
             400, "Bad Request", "The request could not be understood by the server due
                 to malformed syntax.", handle_400,
             401, "Unauthorized", "The request requires user authentication.",

lib/src/rocket.rs

@@ -521,19 +521,19 @@ impl Rocket {
     ///
     /// use rocket::Request;
     ///
-    /// #[error(500)]
+    /// #[catch(500)]
     /// fn internal_error() -> &'static str {
     ///     "Whoops! Looks like we messed up."
     /// }
     ///
-    /// #[error(400)]
+    /// #[catch(400)]
     /// fn not_found(req: &Request) -> String {
     ///     format!("I couldn't find '{}'. Try something else?", req.uri())
     /// }
     ///
     /// fn main() {
     /// # if false { // We don't actually want to launch the server in an example.
-    ///     rocket::ignite().catch(errors![internal_error, not_found])
+    ///     rocket::ignite().catch(catchers![internal_error, not_found])
     /// #       .launch();
     /// # }
     /// }

lib/tests/redirect_from_catcher-issue-113.rs

@@ -5,7 +5,7 @@ extern crate rocket;
 
 use rocket::response::Redirect;
 
-#[error(404)]
+#[catch(404)]
 fn not_found() -> Redirect {
     Redirect::to("/")
 }
@@ -17,7 +17,7 @@ mod tests {
 
     #[test]
     fn error_catcher_redirect() {
-        let client = Client::new(rocket::ignite().catch(errors![not_found])).unwrap();
+        let client = Client::new(rocket::ignite().catch(catchers![not_found])).unwrap();
         let response = client.get("/unknown").dispatch();
         println!("Response:\n{:?}", response);
 

site/guide/requests.md

@@ -737,22 +737,22 @@ Routing may fail for a variety of reasons. These include:
 If any of these conditions occur, Rocket returns an error to the client. To do
 so, Rocket invokes the _error catcher_ corresponding to the error's status code.
 A catcher is like a route, except it only handles errors. Catchers are declared
-via the `error` attribute, which takes a single integer corresponding to the
+via the `catch` attribute, which takes a single integer corresponding to the
 HTTP status code to catch. For instance, to declare a catcher for **404**
 errors, you'd write:
 
 ```rust
-#[error(404)]
+#[catch(404)]
 fn not_found(req: &Request) -> String { ... }
 ```
 
 As with routes, Rocket needs to know about a catcher before it is used to handle
 errors. The process is similar to mounting: call the `catch` method with a list
-of catchers via the `errors!` macro. The invocation to add the **404** catcher
+of catchers via the `catchers!` macro. The invocation to add the **404** catcher
 declared above looks like:
 
 ```rust
-rocket::ignite().catch(errors![not_found])
+rocket::ignite().catch(catchers![not_found])
 ```
 
 Unlike request handlers, error handlers can only take 0, 1, or 2 parameters of

site/overview.toml

@@ -124,12 +124,13 @@ the standard library types including `&str`, `String`, `File`, `Option`, and
 [Template](https://api.rocket.rs/rocket_contrib/struct.Template.html).
 
 The task of a `Responder` is to generate a
-[Response](https://api.rocket.rs/rocket/response/struct.Response.html), if
+[`Response`](https://api.rocket.rs/rocket/response/struct.Response.html), if
 possible. `Responder`s can fail with a status code. When they do, Rocket calls
-the corresponding `error` route, which can be declared as follows:
+the corresponding error catcher, a `catch` route, which can be declared as
+follows:
 
 ```rust
-#[error(404)]
+#[catch(404)]
 fn not_found() -> T { ... }
 ```
 '''