Add NAN test to docs

diff --git a/src/libstd/f32.rs b/src/libstd/f32.rs
index 2fabe30fa93661a831dd4c728f02dd730e2af398..a5e28722054a599dd72387b10e0390d6ebc826e4 100644 (file)
--- a/src/libstd/f32.rs
+++ b/src/libstd/f32.rs
@@ -970,6 +970,7 @@ pub fn atanh(self) -> f32 {
     /// assert!((-3.0f32).clamp(-2.0f32, 1.0f32) == -2.0f32);
     /// assert!((0.0f32).clamp(-2.0f32, 1.0f32) == 0.0f32);
     /// assert!((2.0f32).clamp(-2.0f32, 1.0f32) == 1.0f32);
+    /// assert!((std::f32::NAN).clamp(-2.0f32, 1.0f32).is_nan()); 
     /// ```
     #[unstable(feature = "clamp", issue = "44095")]
     #[inline]

diff --git a/src/libstd/f64.rs b/src/libstd/f64.rs
index a471117f6d6fdaf0789b3cc0822a06da18472c1d..f69c0b8aae35696082b46ab35598d09893ff002f 100644 (file)
--- a/src/libstd/f64.rs
+++ b/src/libstd/f64.rs
@@ -892,6 +892,7 @@ pub fn atanh(self) -> f64 {
     /// assert!((-3.0f64).clamp(-2.0f64, 1.0f64) == -2.0f64);
     /// assert!((0.0f64).clamp(-2.0f64, 1.0f64) == 0.0f64);
     /// assert!((2.0f64).clamp(-2.0f64, 1.0f64) == 1.0f64);
+    /// assert!((std::f64::NAN).clamp(-2.0f32, 1.0f32).is_nan()); 
     /// ```
     #[unstable(feature = "clamp", issue = "44095")]
     #[inline]