rustc: Add lint for obsolete attributes

This also moves `#[auto_{en,de}code]` checker from syntax to lint.

3 files changed, 1 insertions, 43 deletions

diff --git a/src/libsyntax/ext/auto_encode.rs b/src/libsyntax/ext/auto_encode.rs
deleted file mode 100644
index c1e7ba60fad..00000000000
--- a/src/libsyntax/ext/auto_encode.rs
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-/// Deprecated #[auto_encode] and #[auto_decode] syntax extensions
-
-use ast;
-use codemap::Span;
-use ext::base::*;
-
-pub fn expand_auto_encode(
-    cx: @ExtCtxt,
-    span: Span,
-    _mitem: @ast::MetaItem,
-    in_items: ~[@ast::item]
-) -> ~[@ast::item] {
-    cx.span_err(span, "`#[auto_encode]` is deprecated, use `#[deriving(Encodable)]` instead");
-    in_items
-}
-
-pub fn expand_auto_decode(
-    cx: @ExtCtxt,
-    span: Span,
-    _mitem: @ast::MetaItem,
-    in_items: ~[@ast::item]
-) -> ~[@ast::item] {
-    cx.span_err(span, "`#[auto_decode]` is deprecated, use `#[deriving(Decodable)]` instead");
-    in_items
-}
diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 448f8ee88f9..ccb88e0c9c0 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -143,7 +143,7 @@ pub enum MacResult {
 }
 
 pub enum SyntaxExtension {
-    // #[auto_encode] and such
+    // #[deriving] and such
     ItemDecorator(ItemDecorator),
 
     // Token-tree expanders
@@ -229,12 +229,6 @@ pub fn syntax_expander_table() -> SyntaxEnv {
     syntax_expanders.insert(intern(&"format_args"),
                             builtin_normal_tt_no_ctxt(
                                 ext::format::expand_args));
-    syntax_expanders.insert(
-        intern(&"auto_encode"),
-        @SE(ItemDecorator(ext::auto_encode::expand_auto_encode)));
-    syntax_expanders.insert(
-        intern(&"auto_decode"),
-        @SE(ItemDecorator(ext::auto_encode::expand_auto_decode)));
     syntax_expanders.insert(intern(&"env"),
                             builtin_normal_tt_no_ctxt(
                                     ext::env::expand_env));
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 247be194b90..29ed87f2202 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -83,7 +83,6 @@ pub mod ext {
     pub mod concat;
     pub mod concat_idents;
     pub mod log_syntax;
-    pub mod auto_encode;
     pub mod source_util;
 
     pub mod trace_macros;