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

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Stabilize reverse_bits feature

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

Closes #48763

r? @Centril
This commit is contained in:
Mazdak Farrokhzad 2019-06-01 06:50:03 +02:00 • committed by GitHub
commit 7d3a0dd2fb
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8 changed files with 11 additions and 22 deletions
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2
src/test/run-pass/const-int-conversion.rs
View file

@ -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]);

2
src/test/ui/consts/const-int-conversion.rs
View file

@ -1,5 +1,3 @@
#![feature(reverse_bits)]
fn main() {
let x: &'static i32 = &(5_i32.reverse_bits());
//~^ ERROR temporary value dropped while borrowed

14
src/test/ui/consts/const-int-conversion.stderr
View file

@ -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