Feature gate macro_reexport. Fixes #20906

Author: flaper87

src/libstd/lib.rs

@@ -114,7 +114,6 @@
 #![feature(old_impl_check)]
 #![feature(optin_builtin_traits)]
 #![feature(int_uint)]
-#![feature(int_uint)]
 #![feature(core)]
 #![feature(libc)]
 #![feature(alloc)]
@@ -123,6 +122,7 @@
 #![feature(rand)]
 #![feature(hash)]
 #![cfg_attr(test, feature(test))]
+#![feature(macro_reexport)]
 
 // Don't link to std. We are std.
 #![no_std]

src/libsyntax/feature_gate.rs

@@ -109,6 +109,9 @@ static KNOWN_FEATURES: &'static [(&'static str, &'static str, Status)] = &[
     // int and uint are now deprecated
     ("int_uint", "1.0.0", Active),
 
+    // macro reexport needs more discusion and stabilization
+    ("macro_reexport", Active),
+
     // These are used to test this portion of the compiler, they don't actually
     // mean anything
     ("test_accepted_feature", "1.0.0", Accepted),
@@ -272,6 +275,10 @@ impl<'a, 'v> Visitor<'v> for PostExpansionVisitor<'a> {
                     self.gate_feature("plugin", i.span,
                                       "compiler plugins are experimental \
                                        and possibly buggy");
+                } else if attr::contains_name(&i.attrs[], "macro_reexport") {
+                    self.gate_feature("macro_reexport", i.span,
+                                      "macros reexports are experimental \
+                                       and possibly buggy");
                 }
             }
 

src/test/auxiliary/macro_reexport_2.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 #![crate_type = "dylib"]
+#![feature(macro_reexport)]
 
 #[macro_reexport(reexported)]
 #[macro_use] #[no_link]

src/test/auxiliary/macro_reexport_2_no_use.rs

@@ -9,6 +9,7 @@
 // except according to those terms.
 
 #![crate_type = "dylib"]
+#![feature(macro_reexport)]
 
 #[macro_reexport(reexported)]
 #[no_link]

src/test/compile-fail/macro-reexport-malformed-1.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![feature(macro_reexport)]
+
 #[macro_reexport]  //~ ERROR bad macro reexport
 extern crate std;
 

src/test/compile-fail/macro-reexport-malformed-2.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![feature(macro_reexport)]
+
 #[macro_reexport="foo"]  //~ ERROR bad macro reexport
 extern crate std;
 

src/test/compile-fail/macro-reexport-malformed-3.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![feature(macro_reexport)]
+
 #[macro_reexport(foo="bar")]  //~ ERROR bad macro reexport
 extern crate std;
 

src/test/compile-fail/macro-reexport-not-locally-visible.rs

@@ -11,6 +11,8 @@
 // aux-build:macro_reexport_1.rs
 // ignore-stage1
 
+#![feature(macro_reexport)]
+
 #[macro_reexport(reexported)]
 #[no_link]
 extern crate macro_reexport_1;