resolve: Remove `rustc_attrs` as a standalone feature gate

Now it only gates specific built-in attributes

9 files changed, 69 insertions, 87 deletions

diff --git a/src/test/ui-fulldeps/auxiliary/lint-for-crate-rpass.rs b/src/test/ui-fulldeps/auxiliary/lint-for-crate-rpass.rs
index 52620b2464b..f8cb1640cb4 100644
--- a/src/test/ui-fulldeps/auxiliary/lint-for-crate-rpass.rs
+++ b/src/test/ui-fulldeps/auxiliary/lint-for-crate-rpass.rs
@@ -2,19 +2,19 @@
 
 #![feature(plugin_registrar, rustc_private)]
 #![feature(box_syntax)]
+
 extern crate rustc_driver;
 extern crate rustc_hir;
-extern crate rustc_span;
-#[macro_use]
 extern crate rustc_lint;
+extern crate rustc_span;
 #[macro_use]
 extern crate rustc_session;
 extern crate rustc_ast;
 
+use rustc_ast::attr;
 use rustc_driver::plugin::Registry;
 use rustc_lint::{LateContext, LateLintPass, LintContext, LintPass};
 use rustc_span::symbol::Symbol;
-use rustc_ast::attr;
 
 macro_rules! fake_lint_pass {
     ($struct:ident, $($attr:expr),*) => {
@@ -50,17 +50,17 @@ declare_lint!(CRATE_NOT_GREEN, Warn, "crate not marked with #![crate_green]");
 
 fake_lint_pass! {
     PassOkay,
-    Symbol::intern("rustc_crate_okay")
+    Symbol::intern("crate_okay")
 }
 
 fake_lint_pass! {
     PassRedBlue,
-    Symbol::intern("rustc_crate_red"), Symbol::intern("rustc_crate_blue")
+    Symbol::intern("crate_red"), Symbol::intern("crate_blue")
 }
 
 fake_lint_pass! {
     PassGreyGreen,
-    Symbol::intern("rustc_crate_grey"), Symbol::intern("rustc_crate_green")
+    Symbol::intern("crate_grey"), Symbol::intern("crate_green")
 }
 
 #[plugin_registrar]
diff --git a/src/test/ui-fulldeps/auxiliary/macro-crate-test.rs b/src/test/ui-fulldeps/auxiliary/macro-crate-test.rs
deleted file mode 100644
index 56a560acbb4..00000000000
--- a/src/test/ui-fulldeps/auxiliary/macro-crate-test.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-// force-host
-// no-prefer-dynamic
-
-#![crate_type = "proc-macro"]
-#![feature(rustc_private)]
-
-extern crate rustc_ast;
-extern crate rustc;
-extern crate rustc_driver;
-extern crate proc_macro;
-
-use proc_macro::{TokenTree, TokenStream};
-
-#[proc_macro_attribute]
-pub fn rustc_duplicate(attr: TokenStream, item: TokenStream) -> TokenStream {
-    let mut new_name = Some(attr.into_iter().nth(0).unwrap());
-    let mut encountered_idents = 0;
-    let input = item.to_string();
-    let ret = item.into_iter().map(move |token| match token {
-        TokenTree::Ident(_) if encountered_idents == 1 => {
-            encountered_idents += 1;
-            new_name.take().unwrap()
-        }
-        TokenTree::Ident(_) => {
-            encountered_idents += 1;
-            token
-        }
-        _ => token
-    }).collect::<TokenStream>();
-    let mut input_again = input.parse::<TokenStream>().unwrap();
-    input_again.extend(ret);
-    input_again
-}
diff --git a/src/test/ui-fulldeps/issue-15778-pass.rs b/src/test/ui-fulldeps/issue-15778-pass.rs
index 4b3cf07e283..c031dbc7155 100644
--- a/src/test/ui-fulldeps/issue-15778-pass.rs
+++ b/src/test/ui-fulldeps/issue-15778-pass.rs
@@ -1,23 +1,23 @@
-// run-pass
+// check-pass
 // aux-build:lint-for-crate-rpass.rs
 // ignore-stage1
 // compile-flags: -D crate-not-okay
 
-#![feature(plugin, register_attr, custom_inner_attributes, rustc_attrs)]
+#![feature(plugin, register_attr, custom_inner_attributes)]
 
 #![register_attr(
-    rustc_crate_okay,
-    rustc_crate_blue,
-    rustc_crate_red,
-    rustc_crate_grey,
-    rustc_crate_green,
+    crate_okay,
+    crate_blue,
+    crate_red,
+    crate_grey,
+    crate_green,
 )]
 
 #![plugin(lint_for_crate_rpass)] //~ WARNING compiler plugins are deprecated
-#![rustc_crate_okay]
-#![rustc_crate_blue]
-#![rustc_crate_red]
-#![rustc_crate_grey]
-#![rustc_crate_green]
+#![crate_okay]
+#![crate_blue]
+#![crate_red]
+#![crate_grey]
+#![crate_green]
 
 fn main() {}
diff --git a/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr b/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
index 1e039f17a0d..1517a7a5c73 100644
--- a/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
+++ b/src/test/ui/feature-gates/feature-gate-rustc-attrs.stderr
@@ -1,10 +1,8 @@
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/feature-gate-rustc-attrs.rs:8:3
    |
 LL | #[rustc::unknown]
    |   ^^^^^
-   |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: expected attribute, found macro `rustc::unknown`
   --> $DIR/feature-gate-rustc-attrs.rs:8:3
@@ -12,13 +10,11 @@ error: expected attribute, found macro `rustc::unknown`
 LL | #[rustc::unknown]
    |   ^^^^^^^^^^^^^^ not an attribute
 
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/feature-gate-rustc-attrs.rs:13:12
    |
 LL | #[unknown::rustc]
    |            ^^^^^
-   |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: expected attribute, found macro `unknown::rustc`
   --> $DIR/feature-gate-rustc-attrs.rs:13:3
@@ -26,13 +22,11 @@ error: expected attribute, found macro `unknown::rustc`
 LL | #[unknown::rustc]
    |   ^^^^^^^^^^^^^^ not an attribute
 
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/feature-gate-rustc-attrs.rs:20:3
    |
 LL | #[rustc_unknown]
    |   ^^^^^^^^^^^^^
-   |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: cannot find attribute `rustc_unknown` in this scope
   --> $DIR/feature-gate-rustc-attrs.rs:20:3
diff --git a/src/test/ui/proc-macro/auxiliary/duplicate.rs b/src/test/ui/proc-macro/auxiliary/duplicate.rs
new file mode 100644
index 00000000000..b8f82b46f09
--- /dev/null
+++ b/src/test/ui/proc-macro/auxiliary/duplicate.rs
@@ -0,0 +1,32 @@
+// force-host
+// no-prefer-dynamic
+
+#![deny(unused)]
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+use proc_macro::*;
+
+#[proc_macro_attribute]
+pub fn duplicate(attr: TokenStream, item: TokenStream) -> TokenStream {
+    let mut new_name = Some(attr.into_iter().nth(0).unwrap());
+    let mut encountered_idents = 0;
+    let input = item.to_string();
+    let ret = item
+        .into_iter()
+        .map(move |token| match token {
+            TokenTree::Ident(_) if encountered_idents == 1 => {
+                encountered_idents += 1;
+                new_name.take().unwrap()
+            }
+            TokenTree::Ident(_) => {
+                encountered_idents += 1;
+                token
+            }
+            _ => token,
+        })
+        .collect::<TokenStream>();
+    let mut input_again = input.parse::<TokenStream>().unwrap();
+    input_again.extend(ret);
+    input_again
+}
diff --git a/src/test/ui/proc-macro/expand-to-unstable-2.stderr b/src/test/ui/proc-macro/expand-to-unstable-2.stderr
index 19144b210a1..5974fa4c554 100644
--- a/src/test/ui/proc-macro/expand-to-unstable-2.stderr
+++ b/src/test/ui/proc-macro/expand-to-unstable-2.stderr
@@ -1,12 +1,10 @@
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/expand-to-unstable-2.rs:10:10
    |
 LL | #[derive(Unstable)]
    |          ^^^^^^^^
    |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
    = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 
-For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui-fulldeps/macro-crate-multi-decorator.rs b/src/test/ui/proc-macro/macro-crate-multi-decorator.rs
index f21617be5d2..ec57dec14ed 100644
--- a/src/test/ui-fulldeps/macro-crate-multi-decorator.rs
+++ b/src/test/ui/proc-macro/macro-crate-multi-decorator.rs
@@ -1,36 +1,33 @@
-// check-pass
-// aux-build:macro-crate-test.rs
-// ignore-stage1
+// The duplicate macro will create a copy of the item with the given identifier.
 
-#![feature(rustc_attrs)]
+// check-pass
+// aux-build:duplicate.rs
 
 #[macro_use]
-extern crate macro_crate_test;
-
-// The duplicate macro will create a copy of the item with the given identifier.
+extern crate duplicate;
 
-#[rustc_duplicate(MyCopy)]
+#[duplicate(MyCopy)]
 struct MyStruct {
-    number: i32
+    number: i32,
 }
 
 trait TestTrait {
-    #[rustc_duplicate(TestType2)]
+    #[duplicate(TestType2)]
     type TestType;
 
-    #[rustc_duplicate(required_fn2)]
+    #[duplicate(required_fn2)]
     fn required_fn(&self);
 
-    #[rustc_duplicate(provided_fn2)]
-    fn provided_fn(&self) { }
+    #[duplicate(provided_fn2)]
+    fn provided_fn(&self) {}
 }
 
 impl TestTrait for MyStruct {
-    #[rustc_duplicate(TestType2)]
+    #[duplicate(TestType2)]
     type TestType = f64;
 
-    #[rustc_duplicate(required_fn2)]
-    fn required_fn(&self) { }
+    #[duplicate(required_fn2)]
+    fn required_fn(&self) {}
 }
 
 fn main() {
diff --git a/src/test/ui/reserved/reserved-attr-on-macro.stderr b/src/test/ui/reserved/reserved-attr-on-macro.stderr
index c387bba0a13..e55b58bef28 100644
--- a/src/test/ui/reserved/reserved-attr-on-macro.stderr
+++ b/src/test/ui/reserved/reserved-attr-on-macro.stderr
@@ -1,10 +1,8 @@
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/reserved-attr-on-macro.rs:1:3
    |
 LL | #[rustc_attribute_should_be_reserved]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: cannot determine resolution for the macro `foo`
   --> $DIR/reserved-attr-on-macro.rs:10:5
@@ -22,4 +20,3 @@ LL | #[rustc_attribute_should_be_reserved]
 
 error: aborting due to 3 previous errors
 
-For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui/suggestions/attribute-typos.stderr b/src/test/ui/suggestions/attribute-typos.stderr
index c7c257ba5fe..1c307f0e2c1 100644
--- a/src/test/ui/suggestions/attribute-typos.stderr
+++ b/src/test/ui/suggestions/attribute-typos.stderr
@@ -1,10 +1,8 @@
-error[E0658]: attributes starting with `rustc` are reserved for use by the `rustc` compiler
+error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
   --> $DIR/attribute-typos.rs:11:3
    |
 LL | #[rustc_err]
    |   ^^^^^^^^^
-   |
-   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
 
 error: cannot find attribute `rustc_err` in this scope
   --> $DIR/attribute-typos.rs:11:3
@@ -31,4 +29,3 @@ LL | #[deprcated]
 
 error: aborting due to 4 previous errors
 
-For more information about this error, try `rustc --explain E0658`.