Rollup merge of rust-lang#72906 - lzutao:migrate-numeric-assoc-consts, r=dtolnay

Migrate to numeric associated consts

The deprecation PR is rust-lang#72885

cc rust-lang#68490
cc rust-lang/rfcs#2700

Author: Dylan-DPC

src/liballoc/rc.rs

@@ -2034,7 +2034,7 @@ trait RcBoxPtr<T: ?Sized> {
         // The reference count will never be zero when this is called;
         // nevertheless, we insert an abort here to hint LLVM at
         // an otherwise missed optimization.
-        if strong == 0 || strong == usize::max_value() {
+        if strong == 0 || strong == usize::MAX {
             abort();
         }
         self.inner().strong.set(strong + 1);
@@ -2058,7 +2058,7 @@ trait RcBoxPtr<T: ?Sized> {
         // The reference count will never be zero when this is called;
         // nevertheless, we insert an abort here to hint LLVM at
         // an otherwise missed optimization.
-        if weak == 0 || weak == usize::max_value() {
+        if weak == 0 || weak == usize::MAX {
             abort();
         }
         self.inner().weak.set(weak + 1);

src/liballoc/rc/tests.rs

@@ -407,14 +407,14 @@ fn test_from_vec() {
 fn test_downcast() {
     use std::any::Any;
 
-    let r1: Rc<dyn Any> = Rc::new(i32::max_value());
+    let r1: Rc<dyn Any> = Rc::new(i32::MAX);
     let r2: Rc<dyn Any> = Rc::new("abc");
 
     assert!(r1.clone().downcast::<u32>().is_err());
 
     let r1i32 = r1.downcast::<i32>();
     assert!(r1i32.is_ok());
-    assert_eq!(r1i32.unwrap(), Rc::new(i32::max_value()));
+    assert_eq!(r1i32.unwrap(), Rc::new(i32::MAX));
 
     assert!(r2.clone().downcast::<i32>().is_err());
 

src/liballoc/sync/tests.rs

@@ -465,14 +465,14 @@ fn test_from_vec() {
 fn test_downcast() {
     use std::any::Any;
 
-    let r1: Arc<dyn Any + Send + Sync> = Arc::new(i32::max_value());
+    let r1: Arc<dyn Any + Send + Sync> = Arc::new(i32::MAX);
     let r2: Arc<dyn Any + Send + Sync> = Arc::new("abc");
 
     assert!(r1.clone().downcast::<u32>().is_err());
 
     let r1i32 = r1.downcast::<i32>();
     assert!(r1i32.is_ok());
-    assert_eq!(r1i32.unwrap(), Arc::new(i32::max_value()));
+    assert_eq!(r1i32.unwrap(), Arc::new(i32::MAX));
 
     assert!(r2.clone().downcast::<i32>().is_err());
 

src/liballoc/tests/str.rs

@@ -566,13 +566,13 @@ mod slice_index {
                 data: "hello";
                 // note: using 0 specifically ensures that the result of overflowing is 0..0,
                 //       so that `get` doesn't simply return None for the wrong reason.
-                bad: data[0..=usize::max_value()];
+                bad: data[0..=usize::MAX];
                 message: "maximum usize";
             }
 
             in mod rangetoinclusive {
                 data: "hello";
-                bad: data[..=usize::max_value()];
+                bad: data[..=usize::MAX];
                 message: "maximum usize";
             }
         }

src/liballoc/tests/vec.rs

@@ -68,7 +68,7 @@ fn test_reserve() {
 
 #[test]
 fn test_zst_capacity() {
-    assert_eq!(Vec::<()>::new().capacity(), usize::max_value());
+    assert_eq!(Vec::<()>::new().capacity(), usize::MAX);
 }
 
 #[test]
@@ -563,19 +563,19 @@ fn test_drain_inclusive_range() {
 
 #[test]
 fn test_drain_max_vec_size() {
-    let mut v = Vec::<()>::with_capacity(usize::max_value());
+    let mut v = Vec::<()>::with_capacity(usize::MAX);
     unsafe {
-        v.set_len(usize::max_value());
+        v.set_len(usize::MAX);
     }
-    for _ in v.drain(usize::max_value() - 1..) {}
-    assert_eq!(v.len(), usize::max_value() - 1);
+    for _ in v.drain(usize::MAX - 1..) {}
+    assert_eq!(v.len(), usize::MAX - 1);
 
-    let mut v = Vec::<()>::with_capacity(usize::max_value());
+    let mut v = Vec::<()>::with_capacity(usize::MAX);
     unsafe {
-        v.set_len(usize::max_value());
+        v.set_len(usize::MAX);
     }
-    for _ in v.drain(usize::max_value() - 1..=usize::max_value() - 1) {}
-    assert_eq!(v.len(), usize::max_value() - 1);
+    for _ in v.drain(usize::MAX - 1..=usize::MAX - 1) {}
+    assert_eq!(v.len(), usize::MAX - 1);
 }
 
 #[test]

src/libcore/cell.rs

@@ -1163,16 +1163,16 @@ impl<'b> BorrowRef<'b> {
             // Incrementing borrow can result in a non-reading value (<= 0) in these cases:
             // 1. It was < 0, i.e. there are writing borrows, so we can't allow a read borrow
             //    due to Rust's reference aliasing rules
-            // 2. It was isize::max_value() (the max amount of reading borrows) and it overflowed
-            //    into isize::min_value() (the max amount of writing borrows) so we can't allow
+            // 2. It was isize::MAX (the max amount of reading borrows) and it overflowed
+            //    into isize::MIN (the max amount of writing borrows) so we can't allow
             //    an additional read borrow because isize can't represent so many read borrows
             //    (this can only happen if you mem::forget more than a small constant amount of
             //    `Ref`s, which is not good practice)
             None
         } else {
             // Incrementing borrow can result in a reading value (> 0) in these cases:
             // 1. It was = 0, i.e. it wasn't borrowed, and we are taking the first read borrow
-            // 2. It was > 0 and < isize::max_value(), i.e. there were read borrows, and isize
+            // 2. It was > 0 and < isize::MAX, i.e. there were read borrows, and isize
             //    is large enough to represent having one more read borrow
             borrow.set(b);
             Some(BorrowRef { borrow })
@@ -1198,7 +1198,7 @@ impl Clone for BorrowRef<'_> {
         debug_assert!(is_reading(borrow));
         // Prevent the borrow counter from overflowing into
         // a writing borrow.
-        assert!(borrow != isize::max_value());
+        assert!(borrow != isize::MAX);
         self.borrow.set(borrow + 1);
         BorrowRef { borrow: self.borrow }
     }
@@ -1489,7 +1489,7 @@ impl<'b> BorrowRefMut<'b> {
         let borrow = self.borrow.get();
         debug_assert!(is_writing(borrow));
         // Prevent the borrow counter from underflowing.
-        assert!(borrow != isize::min_value());
+        assert!(borrow != isize::MIN);
         self.borrow.set(borrow - 1);
         BorrowRefMut { borrow: self.borrow }
     }

src/libcore/convert/num.rs

@@ -217,7 +217,7 @@ macro_rules! try_from_upper_bounded {
             /// is outside of the range of the target type.
             #[inline]
             fn try_from(u: $source) -> Result<Self, Self::Error> {
-                if u > (Self::max_value() as $source) {
+                if u > (Self::MAX as $source) {
                     Err(TryFromIntError(()))
                 } else {
                     Ok(u as Self)
@@ -239,8 +239,8 @@ macro_rules! try_from_both_bounded {
             /// is outside of the range of the target type.
             #[inline]
             fn try_from(u: $source) -> Result<Self, Self::Error> {
-                let min = Self::min_value() as $source;
-                let max = Self::max_value() as $source;
+                let min = Self::MIN as $source;
+                let max = Self::MAX as $source;
                 if u < min || u > max {
                     Err(TryFromIntError(()))
                 } else {

src/libcore/num/mod.rs

@@ -750,9 +750,9 @@ $EndFeature, "
         }
 
         doc_comment! {
-            concat!("Unchecked integer addition. Computes `self + rhs, assuming overflow
+            concat!("Unchecked integer addition. Computes `self + rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self + rhs > ", stringify!($SelfT),
-"::max_value()` or `self + rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self + rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -792,9 +792,9 @@ $EndFeature, "
         }
 
         doc_comment! {
-            concat!("Unchecked integer subtraction. Computes `self - rhs, assuming overflow
+            concat!("Unchecked integer subtraction. Computes `self - rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self - rhs > ", stringify!($SelfT),
-"::max_value()` or `self - rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self - rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -834,9 +834,9 @@ $EndFeature, "
         }
 
         doc_comment! {
-            concat!("Unchecked integer multiplication. Computes `self * rhs, assuming overflow
+            concat!("Unchecked integer multiplication. Computes `self * rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self * rhs > ", stringify!($SelfT),
-"::max_value()` or `self * rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self * rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -871,7 +871,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn checked_div(self, rhs: Self) -> Option<Self> {
-                if rhs == 0 || (self == Self::min_value() && rhs == -1) {
+                if rhs == 0 || (self == Self::MIN && rhs == -1) {
                     None
                 } else {
                     // SAFETY: div by zero and by INT_MIN have been checked above
@@ -900,7 +900,7 @@ assert_eq!((1", stringify!($SelfT), ").checked_div_euclid(0), None);
                           without modifying the original"]
             #[inline]
             pub const fn checked_div_euclid(self, rhs: Self) -> Option<Self> {
-                if rhs == 0 || (self == Self::min_value() && rhs == -1) {
+                if rhs == 0 || (self == Self::MIN && rhs == -1) {
                     None
                 } else {
                     Some(self.div_euclid(rhs))
@@ -929,7 +929,7 @@ $EndFeature, "
                           without modifying the original"]
             #[inline]
             pub const fn checked_rem(self, rhs: Self) -> Option<Self> {
-                if rhs == 0 || (self == Self::min_value() && rhs == -1) {
+                if rhs == 0 || (self == Self::MIN && rhs == -1) {
                     None
                 } else {
                     // SAFETY: div by zero and by INT_MIN have been checked above
@@ -957,7 +957,7 @@ assert_eq!(", stringify!($SelfT), "::MIN.checked_rem_euclid(-1), None);
                           without modifying the original"]
             #[inline]
             pub const fn checked_rem_euclid(self, rhs: Self) -> Option<Self> {
-                if rhs == 0 || (self == Self::min_value() && rhs == -1) {
+                if rhs == 0 || (self == Self::MIN && rhs == -1) {
                     None
                 } else {
                     Some(self.rem_euclid(rhs))
@@ -1236,9 +1236,9 @@ $EndFeature, "
                 match self.checked_mul(rhs) {
                     Some(x) => x,
                     None => if (self < 0) == (rhs < 0) {
-                        Self::max_value()
+                        Self::MAX
                     } else {
-                        Self::min_value()
+                        Self::MIN
                     }
                 }
             }
@@ -1267,8 +1267,8 @@ $EndFeature, "
             pub const fn saturating_pow(self, exp: u32) -> Self {
                 match self.checked_pow(exp) {
                     Some(x) => x,
-                    None if self < 0 && exp % 2 == 1 => Self::min_value(),
-                    None => Self::max_value(),
+                    None if self < 0 && exp % 2 == 1 => Self::MIN,
+                    None => Self::MAX,
                 }
             }
         }
@@ -1738,7 +1738,7 @@ $EndFeature, "
             #[must_use = "this returns the result of the operation, \
                           without modifying the original"]
             pub const fn overflowing_div(self, rhs: Self) -> (Self, bool) {
-                if self == Self::min_value() && rhs == -1 {
+                if self == Self::MIN && rhs == -1 {
                     (self, true)
                 } else {
                     (self / rhs, false)
@@ -1771,7 +1771,7 @@ assert_eq!(", stringify!($SelfT), "::MIN.overflowing_div_euclid(-1), (", stringi
             #[must_use = "this returns the result of the operation, \
                           without modifying the original"]
             pub const fn overflowing_div_euclid(self, rhs: Self) -> (Self, bool) {
-                if self == Self::min_value() && rhs == -1 {
+                if self == Self::MIN && rhs == -1 {
                     (self, true)
                 } else {
                     (self.div_euclid(rhs), false)
@@ -1805,7 +1805,7 @@ $EndFeature, "
             #[must_use = "this returns the result of the operation, \
                           without modifying the original"]
             pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
-                if self == Self::min_value() && rhs == -1 {
+                if self == Self::MIN && rhs == -1 {
                     (0, true)
                 } else {
                     (self % rhs, false)
@@ -1838,7 +1838,7 @@ assert_eq!(", stringify!($SelfT), "::MIN.overflowing_rem_euclid(-1), (0, true));
                           without modifying the original"]
             #[inline]
             pub const fn overflowing_rem_euclid(self, rhs: Self) -> (Self, bool) {
-                if self == Self::min_value() && rhs == -1 {
+                if self == Self::MIN && rhs == -1 {
                     (0, true)
                 } else {
                     (self.rem_euclid(rhs), false)
@@ -1869,8 +1869,8 @@ assert_eq!(", stringify!($SelfT), "::MIN.overflowing_neg(), (", stringify!($Self
             #[allow(unused_attributes)]
             #[allow_internal_unstable(const_if_match)]
             pub const fn overflowing_neg(self) -> (Self, bool) {
-                if self == Self::min_value() {
-                    (Self::min_value(), true)
+                if self == Self::MIN {
+                    (Self::MIN, true)
                 } else {
                     (-self, false)
                 }
@@ -1952,7 +1952,7 @@ $EndFeature, "
             #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
             #[inline]
             pub const fn overflowing_abs(self) -> (Self, bool) {
-                (self.wrapping_abs(), self == Self::min_value())
+                (self.wrapping_abs(), self == Self::MIN)
             }
         }
 
@@ -2986,9 +2986,9 @@ assert_eq!((", stringify!($SelfT), "::MAX - 2).checked_add(3), None);", $EndFeat
         }
 
         doc_comment! {
-            concat!("Unchecked integer addition. Computes `self + rhs, assuming overflow
+            concat!("Unchecked integer addition. Computes `self + rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self + rhs > ", stringify!($SelfT),
-"::max_value()` or `self + rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self + rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -3026,9 +3026,9 @@ assert_eq!(0", stringify!($SelfT), ".checked_sub(1), None);", $EndFeature, "
         }
 
         doc_comment! {
-            concat!("Unchecked integer subtraction. Computes `self - rhs, assuming overflow
+            concat!("Unchecked integer subtraction. Computes `self - rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self - rhs > ", stringify!($SelfT),
-"::max_value()` or `self - rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self - rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -3066,9 +3066,9 @@ assert_eq!(", stringify!($SelfT), "::MAX.checked_mul(2), None);", $EndFeature, "
         }
 
         doc_comment! {
-            concat!("Unchecked integer multiplication. Computes `self * rhs, assuming overflow
+            concat!("Unchecked integer multiplication. Computes `self * rhs`, assuming overflow
 cannot occur. This results in undefined behavior when `self * rhs > ", stringify!($SelfT),
-"::max_value()` or `self * rhs < ", stringify!($SelfT), "::min_value()`."),
+"::MAX` or `self * rhs < ", stringify!($SelfT), "::MIN`."),
             #[unstable(
                 feature = "unchecked_math",
                 reason = "niche optimization path",
@@ -3367,7 +3367,7 @@ assert_eq!((", stringify!($SelfT), "::MAX).saturating_mul(10), ", stringify!($Se
             pub const fn saturating_mul(self, rhs: Self) -> Self {
                 match self.checked_mul(rhs) {
                     Some(x) => x,
-                    None => Self::max_value(),
+                    None => Self::MAX,
                 }
             }
         }
@@ -3394,7 +3394,7 @@ $EndFeature, "
             pub const fn saturating_pow(self, exp: u32) -> Self {
                 match self.checked_pow(exp) {
                     Some(x) => x,
-                    None => Self::max_value(),
+                    None => Self::MAX,
                 }
             }
         }
@@ -4081,7 +4081,7 @@ Basic usage:
         }
     }
 
-            doc_comment! {
+        doc_comment! {
             concat!("Performs Euclidean division.
 
 Since, for the positive integers, all common
@@ -4179,7 +4179,7 @@ assert!(!10", stringify!($SelfT), ".is_power_of_two());", $EndFeature, "
             // (such as intel pre-haswell) have more efficient ctlz
             // intrinsics when the argument is non-zero.
             let z = unsafe { intrinsics::ctlz_nonzero(p) };
-            <$SelfT>::max_value() >> z
+            <$SelfT>::MAX >> z
         }
 
         doc_comment! {
@@ -5161,9 +5161,9 @@ trait FromStrRadixHelper: PartialOrd + Copy {
 macro_rules! doit {
     ($($t:ty)*) => ($(impl FromStrRadixHelper for $t {
         #[inline]
-        fn min_value() -> Self { Self::min_value() }
+        fn min_value() -> Self { Self::MIN }
         #[inline]
-        fn max_value() -> Self { Self::max_value() }
+        fn max_value() -> Self { Self::MAX }
         #[inline]
         fn from_u32(u: u32) -> Self { u as Self }
         #[inline]