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Separate feature gate for wrapping_next_power_of_two

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This commit is contained in:
Clar Charr 2018-05-15 12:52:16 -04:00
parent a00e68ddc6
commit 99cf5a92ac
2 changed files with 6 additions and 4 deletions
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5
src/libcore/num/mod.rs
View File

@ -3433,14 +3433,15 @@ the return value is wrapped to `0`.
Basic usage:
```
#![feature(wrapping_int_impl)]
#![feature(wrapping_next_power_of_two)]
", $Feature, "
assert_eq!(2", stringify!($SelfT), ".wrapping_next_power_of_two(), 2);
assert_eq!(3", stringify!($SelfT), ".wrapping_next_power_of_two(), 4);
assert_eq!(", stringify!($SelfT), "::max_value().wrapping_next_power_of_two(), 0);",
$EndFeature, "
```"),
#[unstable(feature = "wrapping_int_impl", issue = "32463")]
#[unstable(feature = "wrapping_next_power_of_two", issue = "32463",
reason = "needs decision on wrapping behaviour")]
pub fn wrapping_next_power_of_two(self) -> Self {
self.one_less_than_next_power_of_two().wrapping_add(1)
}

5
src/libcore/num/wrapping.rs
View File

@ -874,7 +874,7 @@ When return value overflows (i.e. `self > (1 << (N-1))` for type
Basic usage:
```
#![feature(wrapping_int_impl)]
#![feature(wrapping_next_power_of_two)]
use std::num::Wrapping;
assert_eq!(Wrapping(2", stringify!($t), ").next_power_of_two(), Wrapping(2));
@ -882,7 +882,8 @@ assert_eq!(Wrapping(3", stringify!($t), ").next_power_of_two(), Wrapping(4));
assert_eq!(Wrapping(200_u8).next_power_of_two(), Wrapping(0));
```"),
#[inline]
#[unstable(feature = "wrapping_int_impl", issue = "32463")]
#[unstable(feature = "wrapping_next_power_of_two", issue = "32463",
reason = "needs decision on wrapping behaviour")]
pub fn next_power_of_two(self) -> Self {
Wrapping(self.0.wrapping_next_power_of_two())
}