From e9ed7652725727480b0ba4050811dba174dc5cda Mon Sep 17 00:00:00 2001
From: Kyuuhachi <caagr98@gmail.com>
Date: Tue, 16 Dec 2025 23:03:24 +0100
Subject: [PATCH 1/3] Implement clamp_to

---
 library/core/src/cmp.rs       | 32 ++++++++++++
 library/core/src/cmp/clamp.rs | 98 +++++++++++++++++++++++++++++++++++
 library/core/src/num/f128.rs  | 33 ++++++++++++
 library/core/src/num/f16.rs   | 33 ++++++++++++
 library/core/src/num/f32.rs   | 33 ++++++++++++
 library/core/src/num/f64.rs   | 33 ++++++++++++
 6 files changed, 262 insertions(+)
 create mode 100644 library/core/src/cmp/clamp.rs

diff --git a/library/core/src/cmp.rs b/library/core/src/cmp.rs
index feb9c43196044..4dd5bc2e3c990 100644
--- a/library/core/src/cmp.rs
+++ b/library/core/src/cmp.rs
@@ -26,7 +26,10 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 mod bytewise;
+mod clamp;
 pub(crate) use bytewise::BytewiseEq;
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+pub use clamp::ClampBounds;
 
 use self::Ordering::*;
 use crate::marker::{Destruct, PointeeSized};
@@ -1096,6 +1099,35 @@ pub const trait Ord: [const] Eq + [const] PartialOrd<Self> + PointeeSized {
             self
         }
     }
+
+    /// Restrict a value to a certain range.
+    ///
+    /// This is equal to `max`, `min`, or `clamp`, depending on whether the range is `min..`,
+    /// `..=max`, or `min..=max`, respectively. Exclusive ranges are not permitted.
+    ///
+    /// # Panics
+    ///
+    /// Panics on `min..=max` if `min > max`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(clamp_to)]
+    /// assert_eq!((-3).clamp_to(-2..=1), -2);
+    /// assert_eq!(0.clamp_to(-2..=1), 0);
+    /// assert_eq!(2.clamp_to(..=1), 1);
+    /// assert_eq!(5.clamp_to(7..), 7);
+    /// ```
+    #[must_use]
+    #[inline]
+    #[unstable(feature = "clamp_to", issue = "147781")]
+    fn clamp_to<R>(self, range: R) -> Self
+    where
+        Self: Sized + [const] Destruct,
+        R: [const] ClampBounds<Self>,
+    {
+        range.clamp(self)
+    }
 }
 
 /// Derive macro generating an impl of the trait [`Ord`].
diff --git a/library/core/src/cmp/clamp.rs b/library/core/src/cmp/clamp.rs
new file mode 100644
index 0000000000000..dd496babbc659
--- /dev/null
+++ b/library/core/src/cmp/clamp.rs
@@ -0,0 +1,98 @@
+use crate::marker::Destruct;
+use crate::ops::{RangeFrom, RangeFull, RangeInclusive, RangeToInclusive};
+
+/// Trait for ranges supported by [`Ord::clamp_to`].
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+#[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+pub const trait ClampBounds<T>: Sized {
+    /// The implementation of [`Ord::clamp_to`].
+    fn clamp(self, value: T) -> T
+    where
+        T: [const] Destruct;
+}
+
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+#[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+impl<T> const ClampBounds<T> for RangeFrom<T>
+where
+    T: [const] Ord,
+{
+    fn clamp(self, value: T) -> T
+    where
+        T: [const] Destruct,
+    {
+        value.max(self.start)
+    }
+}
+
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+#[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+impl<T> const ClampBounds<T> for RangeToInclusive<T>
+where
+    T: [const] Ord,
+{
+    fn clamp(self, value: T) -> T
+    where
+        T: [const] Destruct,
+    {
+        value.min(self.end)
+    }
+}
+
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+#[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+impl<T> const ClampBounds<T> for RangeInclusive<T>
+where
+    T: [const] Ord,
+{
+    fn clamp(self, value: T) -> T
+    where
+        T: [const] Destruct,
+    {
+        let (start, end) = self.into_inner();
+        value.clamp(start, end)
+    }
+}
+
+#[unstable(feature = "clamp_bounds", issue = "147781")]
+#[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+impl<T> const ClampBounds<T> for RangeFull {
+    fn clamp(self, value: T) -> T {
+        value
+    }
+}
+
+macro impl_for_float($t:ty) {
+    #[unstable(feature = "clamp_bounds", issue = "147781")]
+    #[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+    impl const ClampBounds<$t> for RangeFrom<$t> {
+        fn clamp(self, value: $t) -> $t {
+            value.max(self.start)
+        }
+    }
+
+    #[unstable(feature = "clamp_bounds", issue = "147781")]
+    #[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+    impl const ClampBounds<$t> for RangeToInclusive<$t> {
+        fn clamp(self, value: $t) -> $t {
+            value.min(self.end)
+        }
+    }
+
+    #[unstable(feature = "clamp_bounds", issue = "147781")]
+    #[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
+    impl const ClampBounds<$t> for RangeInclusive<$t> {
+        fn clamp(self, value: $t) -> $t {
+            let (start, end) = self.into_inner();
+            // Deliberately avoid using `clamp` to handle NaN consistently
+            value.max(start).min(end)
+        }
+    }
+}
+
+// #[unstable(feature = "f16", issue = "116909")]
+impl_for_float!(f16);
+impl_for_float!(f32);
+impl_for_float!(f64);
+// #[unstable(feature = "f128", issue = "116909")]
+impl_for_float!(f128);
diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index bf99fee4fc78a..fb2659d4ca86f 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -1325,6 +1325,39 @@ impl f128 {
         self.clamp(-limit, limit)
     }
 
+    /// Restrict a value to a certain range.
+    ///
+    /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
+    /// values, this function treats them as unbounded, like `max` and `min`.
+    ///
+    /// Exclusive ranges are not permitted.
+    ///
+    /// # Panics
+    ///
+    /// Panics on `min..=max` if `min > max`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(f128, clamp_to)]
+    /// assert_eq!((-3.0f128).clamp_to(-2.0..=1.0), -2.0);
+    /// assert_eq!(0.0f128.clamp_to(-2.0..=1.0), 0.0);
+    /// assert_eq!(2.0f128.clamp_to(..=1.0), 1.0);
+    /// assert_eq!(5.0f128.clamp_to(7.0..), 7.0);
+    /// assert_eq!(4.0f128.clamp_to(1.0..=f128::NAN), 4.0);
+    /// ```
+    #[must_use]
+    #[inline]
+    #[unstable(feature = "clamp_to", issue = "147781")]
+    pub fn clamp_to<R>(self, range: R) -> Self
+    where
+        Self: Sized,
+        R: crate::cmp::ClampBounds<Self>,
+    {
+        range.clamp(self)
+    }
+
     /// Computes the absolute value of `self`.
     ///
     /// This function always returns the precise result.
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index f39ee22871d5f..686537f7cbfb5 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -1303,6 +1303,39 @@ impl f16 {
         self.clamp(-limit, limit)
     }
 
+    /// Restrict a value to a certain range.
+    ///
+    /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
+    /// values, this function treats them as unbounded, like `max` and `min`.
+    ///
+    /// Exclusive ranges are not permitted.
+    ///
+    /// # Panics
+    ///
+    /// Panics on `min..=max` if `min > max`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(f16, clamp_to)]
+    /// assert_eq!((-3.0f16).clamp_to(-2.0..=1.0), -2.0);
+    /// assert_eq!(0.0f16.clamp_to(-2.0..=1.0), 0.0);
+    /// assert_eq!(2.0f16.clamp_to(..=1.0), 1.0);
+    /// assert_eq!(5.0f16.clamp_to(7.0..), 7.0);
+    /// assert_eq!(4.0f16.clamp_to(1.0..=f16::NAN), 4.0);
+    /// ```
+    #[must_use]
+    #[inline]
+    #[unstable(feature = "clamp_to", issue = "147781")]
+    pub fn clamp_to<R>(self, range: R) -> Self
+    where
+        Self: Sized,
+        R: crate::cmp::ClampBounds<Self>,
+    {
+        range.clamp(self)
+    }
+
     /// Computes the absolute value of `self`.
     ///
     /// This function always returns the precise result.
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index 6fe4285374b23..daad80085f913 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -1477,6 +1477,39 @@ impl f32 {
         self.clamp(-limit, limit)
     }
 
+    /// Restrict a value to a certain range.
+    ///
+    /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
+    /// values, this function treats them as unbounded, like `max` and `min`.
+    ///
+    /// Exclusive ranges are not permitted.
+    ///
+    /// # Panics
+    ///
+    /// Panics on `min..=max` if `min > max`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(clamp_to)]
+    /// assert_eq!((-3.0f32).clamp_to(-2.0..=1.0), -2.0);
+    /// assert_eq!(0.0f32.clamp_to(-2.0..=1.0), 0.0);
+    /// assert_eq!(2.0f32.clamp_to(..=1.0), 1.0);
+    /// assert_eq!(5.0f32.clamp_to(7.0..), 7.0);
+    /// assert_eq!(4.0f32.clamp_to(1.0..=f32::NAN), 4.0);
+    /// ```
+    #[must_use]
+    #[inline]
+    #[unstable(feature = "clamp_to", issue = "147781")]
+    pub fn clamp_to<R>(self, range: R) -> Self
+    where
+        Self: Sized,
+        R: crate::cmp::ClampBounds<Self>,
+    {
+        range.clamp(self)
+    }
+
     /// Computes the absolute value of `self`.
     ///
     /// This function always returns the precise result.
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index d0aca152415e2..dce8d761644bd 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -1475,6 +1475,39 @@ impl f64 {
         self.clamp(-limit, limit)
     }
 
+    /// Restrict a value to a certain range.
+    ///
+    /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
+    /// values, this function treats them as unbounded, like `max` and `min`.
+    ///
+    /// Exclusive ranges are not permitted.
+    ///
+    /// # Panics
+    ///
+    /// Panics on `min..=max` if `min > max`.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(clamp_to)]
+    /// assert_eq!((-3.0f64).clamp_to(-2.0..=1.0), -2.0);
+    /// assert_eq!(0.0f64.clamp_to(-2.0..=1.0), 0.0);
+    /// assert_eq!(2.0f64.clamp_to(..=1.0), 1.0);
+    /// assert_eq!(5.0f64.clamp_to(7.0..), 7.0);
+    /// assert_eq!(4.0f64.clamp_to(1.0..=f64::NAN), 4.0);
+    /// ```
+    #[must_use]
+    #[inline]
+    #[unstable(feature = "clamp_to", issue = "147781")]
+    pub fn clamp_to<R>(self, range: R) -> Self
+    where
+        Self: Sized,
+        R: crate::cmp::ClampBounds<Self>,
+    {
+        range.clamp(self)
+    }
+
     /// Computes the absolute value of `self`.
     ///
     /// This function always returns the precise result.

From f6e951ea576011a7c839f38e211dfe310355d1e8 Mon Sep 17 00:00:00 2001
From: Kyuuhachi <caagr98@gmail.com>
Date: Thu, 18 Dec 2025 19:01:31 +0100
Subject: [PATCH 2/3] Remove trivial bounds

---
 library/core/src/num/f128.rs | 1 -
 library/core/src/num/f16.rs  | 1 -
 library/core/src/num/f32.rs  | 1 -
 library/core/src/num/f64.rs  | 1 -
 4 files changed, 4 deletions(-)

diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index fb2659d4ca86f..7d2ff4c622187 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -1352,7 +1352,6 @@ impl f128 {
     #[unstable(feature = "clamp_to", issue = "147781")]
     pub fn clamp_to<R>(self, range: R) -> Self
     where
-        Self: Sized,
         R: crate::cmp::ClampBounds<Self>,
     {
         range.clamp(self)
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index 686537f7cbfb5..1cd02338609a1 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -1330,7 +1330,6 @@ impl f16 {
     #[unstable(feature = "clamp_to", issue = "147781")]
     pub fn clamp_to<R>(self, range: R) -> Self
     where
-        Self: Sized,
         R: crate::cmp::ClampBounds<Self>,
     {
         range.clamp(self)
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index daad80085f913..08c9a7943259b 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -1504,7 +1504,6 @@ impl f32 {
     #[unstable(feature = "clamp_to", issue = "147781")]
     pub fn clamp_to<R>(self, range: R) -> Self
     where
-        Self: Sized,
         R: crate::cmp::ClampBounds<Self>,
     {
         range.clamp(self)
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index dce8d761644bd..4a523eef33fd7 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -1502,7 +1502,6 @@ impl f64 {
     #[unstable(feature = "clamp_to", issue = "147781")]
     pub fn clamp_to<R>(self, range: R) -> Self
     where
-        Self: Sized,
         R: crate::cmp::ClampBounds<Self>,
     {
         range.clamp(self)

From aeb4276915405f04c442de807dda8f7412a6a24f Mon Sep 17 00:00:00 2001
From: Kyuuhachi <caagr98@gmail.com>
Date: Thu, 18 Dec 2025 23:30:15 +0100
Subject: [PATCH 3/3] Panic on NaN

---
 library/core/src/cmp/clamp.rs |  5 +++--
 library/core/src/num/f128.rs  | 13 ++++++++-----
 library/core/src/num/f16.rs   | 13 ++++++++-----
 library/core/src/num/f32.rs   | 13 ++++++++-----
 library/core/src/num/f64.rs   | 13 ++++++++-----
 5 files changed, 35 insertions(+), 22 deletions(-)

diff --git a/library/core/src/cmp/clamp.rs b/library/core/src/cmp/clamp.rs
index dd496babbc659..e2dcecc533577 100644
--- a/library/core/src/cmp/clamp.rs
+++ b/library/core/src/cmp/clamp.rs
@@ -67,6 +67,7 @@ macro impl_for_float($t:ty) {
     #[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
     impl const ClampBounds<$t> for RangeFrom<$t> {
         fn clamp(self, value: $t) -> $t {
+            assert!(!self.start.is_nan(), "min was NaN");
             value.max(self.start)
         }
     }
@@ -75,6 +76,7 @@ macro impl_for_float($t:ty) {
     #[rustc_const_unstable(feature = "clamp_bounds", issue = "147781")]
     impl const ClampBounds<$t> for RangeToInclusive<$t> {
         fn clamp(self, value: $t) -> $t {
+            assert!(!self.end.is_nan(), "max was NaN");
             value.min(self.end)
         }
     }
@@ -84,8 +86,7 @@ macro impl_for_float($t:ty) {
     impl const ClampBounds<$t> for RangeInclusive<$t> {
         fn clamp(self, value: $t) -> $t {
             let (start, end) = self.into_inner();
-            // Deliberately avoid using `clamp` to handle NaN consistently
-            value.max(start).min(end)
+            value.clamp(start, end)
         }
     }
 }
diff --git a/library/core/src/num/f128.rs b/library/core/src/num/f128.rs
index 7d2ff4c622187..18dcd466f926b 100644
--- a/library/core/src/num/f128.rs
+++ b/library/core/src/num/f128.rs
@@ -1325,17 +1325,20 @@ impl f128 {
         self.clamp(-limit, limit)
     }
 
-    /// Restrict a value to a certain range.
+    /// Restrict a value to a certain range, unless it is NaN.
     ///
     /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
-    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
-    /// values, this function treats them as unbounded, like `max` and `min`.
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, unlike `max` and `min`, it will
+    /// panic if any bound is NaN.
+    ///
+    /// Note that this function returns NaN if the initial value was NaN as
+    /// well.
     ///
     /// Exclusive ranges are not permitted.
     ///
     /// # Panics
     ///
-    /// Panics on `min..=max` if `min > max`.
+    /// Panics on `min..=max` if `min > max`, or if any bound is NaN.
     ///
     /// # Examples
     ///
@@ -1345,7 +1348,7 @@ impl f128 {
     /// assert_eq!(0.0f128.clamp_to(-2.0..=1.0), 0.0);
     /// assert_eq!(2.0f128.clamp_to(..=1.0), 1.0);
     /// assert_eq!(5.0f128.clamp_to(7.0..), 7.0);
-    /// assert_eq!(4.0f128.clamp_to(1.0..=f128::NAN), 4.0);
+    /// assert!(f128::NAN.clamp_to(1.0..=2.0).is_nan());
     /// ```
     #[must_use]
     #[inline]
diff --git a/library/core/src/num/f16.rs b/library/core/src/num/f16.rs
index 1cd02338609a1..70a539caaa71d 100644
--- a/library/core/src/num/f16.rs
+++ b/library/core/src/num/f16.rs
@@ -1303,17 +1303,20 @@ impl f16 {
         self.clamp(-limit, limit)
     }
 
-    /// Restrict a value to a certain range.
+    /// Restrict a value to a certain range, unless it is NaN.
     ///
     /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
-    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
-    /// values, this function treats them as unbounded, like `max` and `min`.
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, unlike `max` and `min`, it will
+    /// panic if any bound is NaN.
+    ///
+    /// Note that this function returns NaN if the initial value was NaN as
+    /// well.
     ///
     /// Exclusive ranges are not permitted.
     ///
     /// # Panics
     ///
-    /// Panics on `min..=max` if `min > max`.
+    /// Panics on `min..=max` if `min > max`, or if any bound is NaN.
     ///
     /// # Examples
     ///
@@ -1323,7 +1326,7 @@ impl f16 {
     /// assert_eq!(0.0f16.clamp_to(-2.0..=1.0), 0.0);
     /// assert_eq!(2.0f16.clamp_to(..=1.0), 1.0);
     /// assert_eq!(5.0f16.clamp_to(7.0..), 7.0);
-    /// assert_eq!(4.0f16.clamp_to(1.0..=f16::NAN), 4.0);
+    /// assert!(f16::NAN.clamp_to(1.0..=2.0).is_nan());
     /// ```
     #[must_use]
     #[inline]
diff --git a/library/core/src/num/f32.rs b/library/core/src/num/f32.rs
index 08c9a7943259b..e1f213eb7b3fa 100644
--- a/library/core/src/num/f32.rs
+++ b/library/core/src/num/f32.rs
@@ -1477,17 +1477,20 @@ impl f32 {
         self.clamp(-limit, limit)
     }
 
-    /// Restrict a value to a certain range.
+    /// Restrict a value to a certain range, unless it is NaN.
     ///
     /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
-    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
-    /// values, this function treats them as unbounded, like `max` and `min`.
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, unlike `max` and `min`, it will
+    /// panic if any bound is NaN.
+    ///
+    /// Note that this function returns NaN if the initial value was NaN as
+    /// well.
     ///
     /// Exclusive ranges are not permitted.
     ///
     /// # Panics
     ///
-    /// Panics on `min..=max` if `min > max`.
+    /// Panics on `min..=max` if `min > max`, or if any bound is NaN.
     ///
     /// # Examples
     ///
@@ -1497,7 +1500,7 @@ impl f32 {
     /// assert_eq!(0.0f32.clamp_to(-2.0..=1.0), 0.0);
     /// assert_eq!(2.0f32.clamp_to(..=1.0), 1.0);
     /// assert_eq!(5.0f32.clamp_to(7.0..), 7.0);
-    /// assert_eq!(4.0f32.clamp_to(1.0..=f32::NAN), 4.0);
+    /// assert!(f32::NAN.clamp_to(1.0..=2.0).is_nan());
     /// ```
     #[must_use]
     #[inline]
diff --git a/library/core/src/num/f64.rs b/library/core/src/num/f64.rs
index 4a523eef33fd7..ccb17dc5913ba 100644
--- a/library/core/src/num/f64.rs
+++ b/library/core/src/num/f64.rs
@@ -1475,17 +1475,20 @@ impl f64 {
         self.clamp(-limit, limit)
     }
 
-    /// Restrict a value to a certain range.
+    /// Restrict a value to a certain range, unless it is NaN.
     ///
     /// This is largely equal to `max`, `min`, or `clamp`, depending on whether the range is
-    /// `min..`, `..=max`, or `min..=max`, respectively. However, whereas `clamp` panics on NaN
-    /// values, this function treats them as unbounded, like `max` and `min`.
+    /// `min..`, `..=max`, or `min..=max`, respectively. However, unlike `max` and `min`, it will
+    /// panic if any bound is NaN.
+    ///
+    /// Note that this function returns NaN if the initial value was NaN as
+    /// well.
     ///
     /// Exclusive ranges are not permitted.
     ///
     /// # Panics
     ///
-    /// Panics on `min..=max` if `min > max`.
+    /// Panics on `min..=max` if `min > max`, or if any bound is NaN.
     ///
     /// # Examples
     ///
@@ -1495,7 +1498,7 @@ impl f64 {
     /// assert_eq!(0.0f64.clamp_to(-2.0..=1.0), 0.0);
     /// assert_eq!(2.0f64.clamp_to(..=1.0), 1.0);
     /// assert_eq!(5.0f64.clamp_to(7.0..), 7.0);
-    /// assert_eq!(4.0f64.clamp_to(1.0..=f64::NAN), 4.0);
+    /// assert!(f64::NAN.clamp_to(1.0..=2.0).is_nan());
     /// ```
     #[must_use]
     #[inline]