Rollup merge of #61364 - lzutao:stabilize-reverse_bits, r=Centril

Stabilize reverse_bits feature

FCP done in https://github.com/rust-lang/rust/issues/48763#issuecomment-497349379

Closes #48763

r? @Centril

3 files changed, 8 insertions, 10 deletions

diff --git a/src/test/run-pass/const-int-conversion.rs b/src/test/run-pass/const-int-conversion.rs
index 19d65860179..3d3240d4342 100644
--- a/src/test/run-pass/const-int-conversion.rs
+++ b/src/test/run-pass/const-int-conversion.rs
@@ -1,4 +1,4 @@
-#![feature(const_int_conversion, reverse_bits)]
+#![feature(const_int_conversion)]
 
 const REVERSE: u32 = 0x12345678_u32.reverse_bits();
 const FROM_BE_BYTES: i32 = i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]);
diff --git a/src/test/ui/consts/const-int-conversion.rs b/src/test/ui/consts/const-int-conversion.rs
index ea409439ed6..b80e616eae7 100644
--- a/src/test/ui/consts/const-int-conversion.rs
+++ b/src/test/ui/consts/const-int-conversion.rs
@@ -1,5 +1,3 @@
-#![feature(reverse_bits)]
-
 fn main() {
     let x: &'static i32 = &(5_i32.reverse_bits());
         //~^ ERROR temporary value dropped while borrowed
diff --git a/src/test/ui/consts/const-int-conversion.stderr b/src/test/ui/consts/const-int-conversion.stderr
index 65330e282c9..237f9627219 100644
--- a/src/test/ui/consts/const-int-conversion.stderr
+++ b/src/test/ui/consts/const-int-conversion.stderr
@@ -1,5 +1,5 @@
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:4:28
+  --> $DIR/const-int-conversion.rs:2:28
    |
 LL |     let x: &'static i32 = &(5_i32.reverse_bits());
    |            ------------    ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -10,7 +10,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:6:28
+  --> $DIR/const-int-conversion.rs:4:28
    |
 LL |     let y: &'static i32 = &(i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]));
    |            ------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -21,7 +21,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:8:28
+  --> $DIR/const-int-conversion.rs:6:28
    |
 LL |     let z: &'static i32 = &(i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]));
    |            ------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -32,7 +32,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:10:28
+  --> $DIR/const-int-conversion.rs:8:28
    |
 LL |     let a: &'static i32 = &(i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])));
    |            ------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -43,7 +43,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:12:29
+  --> $DIR/const-int-conversion.rs:10:29
    |
 LL |     let b: &'static [u8] = &(0x12_34_56_78_i32.to_be_bytes());
    |            -------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -54,7 +54,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:14:29
+  --> $DIR/const-int-conversion.rs:12:29
    |
 LL |     let c: &'static [u8] = &(0x12_34_56_78_i32.to_le_bytes());
    |            -------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
@@ -65,7 +65,7 @@ LL | }
    | - temporary value is freed at the end of this statement
 
 error[E0716]: temporary value dropped while borrowed
-  --> $DIR/const-int-conversion.rs:16:29
+  --> $DIR/const-int-conversion.rs:14:29
    |
 LL |     let d: &'static [u8] = &(i32::min_value().to_be().to_ne_bytes());
    |            -------------    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use