make rustc_target usable outside of rustc

[rust.git] / compiler / rustc_index / src / lib.rs

diff --git a/compiler/rustc_index/src/lib.rs b/compiler/rustc_index/src/lib.rs
index 23a4c1f069662262f0306405815c43ed4c44ff0c..03d8ee139188df3b98a1fc248baa4cdb3bf6c18b 100644 (file)
--- a/compiler/rustc_index/src/lib.rs
+++ b/compiler/rustc_index/src/lib.rs
@@ -1,17 +1,20 @@
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
-#![feature(allow_internal_unstable)]
-#![feature(extend_one)]
-#![feature(min_specialization)]
-#![feature(new_uninit)]
-#![feature(step_trait)]
-#![feature(stmt_expr_attributes)]
-#![feature(test)]
+#![cfg_attr(feature = "nightly", feature(allow_internal_unstable))]
+#![cfg_attr(feature = "nightly", feature(extend_one))]
+#![cfg_attr(feature = "nightly", feature(min_specialization))]
+#![cfg_attr(feature = "nightly", feature(new_uninit))]
+#![cfg_attr(feature = "nightly", feature(step_trait))]
+#![cfg_attr(feature = "nightly", feature(stmt_expr_attributes))]
+#![cfg_attr(feature = "nightly", feature(test))]
 
+#[cfg(feature = "nightly")]
 pub mod bit_set;
+#[cfg(feature = "nightly")]
 pub mod interval;
 pub mod vec;
 
+#[cfg(feature = "rustc_macros")]
 pub use rustc_macros::newtype_index;
 
 /// Type size assertion. The first argument is a type and the second argument is its expected size.