From fae3c583e3be78c16afda97ec08e20db0372d21d Mon Sep 17 00:00:00 2001
From: Ahson Ahmed Khan <ahsonkhan@users.noreply.github.com>
Date: Thu, 2 Mar 2017 10:13:13 -0800
Subject: [PATCH] Removing ref T Span.GetItem and updating Indexer to return
 ref (dotnet/coreclr#9787)

Commit migrated from https://github.com/dotnet/coreclr/commit/7e4f1b5720bea994ea76c7ec8f90e02b0739ec62
---
 src/coreclr/src/mscorlib/src/System/Span.cs | 37 ++---------------------------
 1 file changed, 2 insertions(+), 35 deletions(-)

diff --git a/src/coreclr/src/mscorlib/src/System/Span.cs b/src/coreclr/src/mscorlib/src/System/Span.cs
index cb21853..8fa85cc 100644
--- a/src/coreclr/src/mscorlib/src/System/Span.cs
+++ b/src/coreclr/src/mscorlib/src/System/Span.cs
@@ -191,11 +191,7 @@ namespace System
         /// <exception cref="System.IndexOutOfRangeException">
         /// Thrown when index less than 0 or index greater than or equal to Length
         /// </exception>
-
-        // TODO: https://github.com/dotnet/corefx/issues/13681
-        //   Until we get over the hurdle of C# 7 tooling, this indexer will return "T" and have a setter rather than a "ref T". (The doc comments
-        //   continue to reflect the original intent of returning "ref T")
-        public T this[int index]
+        public ref T this[int index]
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
@@ -203,37 +199,8 @@ namespace System
                 if ((uint)index >= (uint)_length)
                     ThrowHelper.ThrowIndexOutOfRangeException();
 
-                return Unsafe.Add(ref _pointer.Value, index);
+                return ref Unsafe.Add(ref _pointer.Value, index);
             }
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            set
-            {
-                if ((uint)index >= (uint)_length)
-                    ThrowHelper.ThrowIndexOutOfRangeException();
-
-                Unsafe.Add(ref _pointer.Value, index) = value;
-            }
-        }
-
-        /// <summary>
-        /// Returns a reference to specified element of the Span.
-        /// </summary>
-        /// <param name="index"></param>
-        /// <returns></returns>
-        /// <exception cref="System.IndexOutOfRangeException">
-        /// Thrown when index less than 0 or index greater than or equal to Length
-        /// </exception>
-
-        // TODO: https://github.com/dotnet/corefx/issues/13681
-        //   Until we get over the hurdle of C# 7 tooling, this temporary method will simulate the intended "ref T" indexer for those
-        //   who need bypass the workaround for performance.
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public ref T GetItem(int index)
-        {
-            if ((uint)index >= ((uint)_length))
-                ThrowHelper.ThrowIndexOutOfRangeException();
-
-            return ref Unsafe.Add(ref _pointer.Value, index);
         }
 
         /// <summary>
-- 
2.7.4