From 61daa9dce6c2c5011b63db3e6849d5ad73b2e6d5 Mon Sep 17 00:00:00 2001
From: Isis Lovecruft <isis@torproject.org>
Date: Fri, 6 Jul 2018 00:12:35 +0000
Subject: [PATCH] Add a doctest for Scalar::from_u64().

---
 src/scalar.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/scalar.rs b/src/scalar.rs
index f490948..328af05 100644
--- a/src/scalar.rs
+++ b/src/scalar.rs
@@ -527,6 +527,26 @@ impl Scalar {
     }
 
     /// Construct a scalar from the given `u64`.
+    ///
+    /// # Inputs
+    ///
+    /// An `u64` to convert to a `Scalar`.
+    ///
+    /// # Returns
+    ///
+    /// A `Scalar` corresponding to the input `u64`.
+    ///
+    /// # Example
+    ///
+    /// ```
+    /// use curve25519_dalek::scalar::Scalar;
+    ///
+    /// let fourtytwo = Scalar::from_u64(42);
+    /// let six = Scalar::from_u64(6);
+    /// let seven = Scalar::from_u64(7);
+    ///
+    /// assert!(fourtytwo == six * seven);
+    /// ```
     pub fn from_u64(x: u64) -> Scalar {
         let mut s_bytes = [0u8; 32];
         for i in 0..8 {