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Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>` - Tracking issue: #142326 This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value. This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790

2 files changed

Lines changed: 45 additions & 0 deletions

File tree

‎library/core/src/num/nonzero.rs‎

Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
#[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
#[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
#[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
#[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
#[must_use = "this returns the result of the operation, \
1804+
without modifying the original"]
1805+
#[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.

‎library/coretests/tests/nonzero.rs‎

Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
$(
579+
{
580+
assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}

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Comments
 (0)
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Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
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var __re = new RegExp('^' + ".*" + '
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
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var ref = document.referrer;
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
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var __re = new RegExp('^' + "youtube\\.com" + '
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
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var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
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pre code, pre code * {
filter: none !important;
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/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
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var style = document.getElementById('universal-dark-mode-style');
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console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
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} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width… · rust-lang/rust@8b74790 · GitHub
Skip to content
Commit 8b74790
Browse files
matthiaskrgrmatthiaskrgr
authored
Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
feat: Add `bit_width` for unsigned `NonZero<T>`
- Tracking issue: #142326
This pull request adds a method to the unsigned `NonZero<T>` that return the minimum number of bits required to represent a value.
This can be achieved by using the `get` method and the methods added in #142328, but I think adding the `NonZero::bit_width` method is useful because it accomplishes the same thing a little more succinctly.
2 parents 3732c3c + a25950d commit 8b74790
2 files changed
Lines changed: 45 additions & 0 deletions
File tree
‎library/core/src/num/nonzero.rs‎
Lines changed: 27 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1781,6 +1781,33 @@ macro_rules! nonzero_integer_signedness_dependent_methods {
17811781
// SAFETY: `self.get()` can't be zero
17821782
unsafe{NonZero::new_unchecked(self.get().cast_signed())}
17831783
}
1784+
1785+
/// Returns the minimum number of bits required to represent `self`.
1786+
///
1787+
/// # Examples
1788+
///
1789+
/// ```
1790+
/// #![feature(uint_bit_width)]
1791+
///
1792+
/// # use core::num::NonZero;
1793+
/// #
1794+
/// # fn main() { test().unwrap(); }
1795+
/// # fn test() -> Option<()> {
1796+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::MIN.bit_width(), NonZero::new(1)?);")]
1797+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b111)?.bit_width(), NonZero::new(3)?);")]
1798+
 #[doc = concat!("assert_eq!(NonZero::<", stringify!($Int),">::new(0b1110)?.bit_width(), NonZero::new(4)?);")]
1799+
/// # Some(())
1800+
/// # }
1801+
/// ```
1802+
 #[unstable(feature = "uint_bit_width", issue = "142326")]
1803+
 #[must_use = "this returns the result of the operation, \
1804+
 without modifying the original"]
1805+
 #[inline(always)]
1806+
pubconstfn bit_width(self) -> NonZero<u32> {
1807+
// SAFETY: Since `self.leading_zeros()` is always less than
1808+
// `Self::BITS`, this subtraction can never be zero.
1809+
unsafe{NonZero::new_unchecked(Self::BITS - self.leading_zeros())}
1810+
}
17841811
};
17851812

17861813
// Associated items for signed nonzero types only.
‎library/coretests/tests/nonzero.rs‎
Lines changed: 18 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -570,3 +570,21 @@ fn test_nonzero_lowest_one() {
570570
nonzero_int_impl!(i8,i16,i32,i64,i128,isize);
571571
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
572572
}
573+
574+
#[test]
575+
fntest_nonzero_bit_width(){
576+
macro_rules! nonzero_uint_impl {
577+
($($T:ty),+) => {
578+
 $(
579+
{
580+
 assert_eq!(NonZero::<$T>::new(0b010_1100).unwrap().bit_width(),NonZero::new(6).unwrap());
581+
 assert_eq!(NonZero::<$T>::new(0b111_1001).unwrap().bit_width(),NonZero::new(7).unwrap());
582+
 assert_eq!(NonZero::<$T>::MIN.bit_width(),NonZero::new(1).unwrap());
583+
 assert_eq!(NonZero::<$T>::MAX.bit_width(),NonZero::new(<$T>::BITS).unwrap());
584+
}
585+
)+
586+
};
587+
}
588+
589+
nonzero_uint_impl!(u8,u16,u32,u64,u128,usize);
590+
}
0 commit comments
Comments
 (0)