Adding trivial implementations of Span Fill and Clear (#9162)

diff --git a/src/mscorlib/model.xml b/src/mscorlib/model.xml
index 09a9ba8a1c045239a8dba2513956f2e4f18e58ad..324c8b535daa5b1bfa3fe42f463cb5af4939a57c 100644 (file)
--- a/src/mscorlib/model.xml
+++ b/src/mscorlib/model.xml
@@ -12657,6 +12657,8 @@
       <Member Name="Slice(System.Int32,System.Int32)" />
       <Member Name="Equals(System.Object)" />
       <Member Name="DangerousCreate(System.Object,T@,System.Int32)" />
+      <Member Name="Clear" />
+      <Member Name="Fill(T)" />
       <Member Name="GetHashCode" />
       <Member Name="CopyTo(System.Span&lt;T&gt;)" />
       <Member Name="TryCopyTo(System.Span&lt;T&gt;)" />

diff --git a/src/mscorlib/src/System/Span.cs b/src/mscorlib/src/System/Span.cs
index 19e21c0badfd2564c9dbb527b72bf186b440b34a..a6e46d51da473d5412d1749bb40269553f3e60c2 100644 (file)
--- a/src/mscorlib/src/System/Span.cs
+++ b/src/mscorlib/src/System/Span.cs
@@ -226,6 +226,30 @@ namespace System
             return ref Unsafe.Add(ref _pointer.Value, index);
         }
 
+        /// <summary>
+        /// Clears the contents of this span.
+        /// </summary>
+        public void Clear()
+        {
+            // TODO: Optimize - https://github.com/dotnet/coreclr/issues/9161
+            for (int i = 0; i < _length; i++)
+            {
+                this[i] = default(T);
+            }
+        }
+
+        /// <summary>
+        /// Fills the contents of this span with the given value.
+        /// </summary>
+        public void Fill(T value)
+        {
+            // TODO: Optimize - https://github.com/dotnet/coreclr/issues/9161
+            for (int i = 0; i < _length; i++)
+            {
+                this[i] = value;
+            }
+        }
+
         /// <summary>
         /// Copies the contents of this span into destination span. If the source
         /// and destinations overlap, this method behaves as if the original values in