From 32fd0cfa25bbb010e699703d273a013e81469d0e Mon Sep 17 00:00:00 2001
From: Michael Ilseman <milseman@apple.com>
Date: Mon, 27 Jan 2020 11:39:34 -0800
Subject: [PATCH] WIP: Demonstrate dropping count field from FixedArray

---
 stdlib/public/core/FixedArray.swift | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/stdlib/public/core/FixedArray.swift b/stdlib/public/core/FixedArray.swift
index ef864a4329081..7481a683babb1 100644
--- a/stdlib/public/core/FixedArray.swift
+++ b/stdlib/public/core/FixedArray.swift
@@ -24,7 +24,7 @@ internal struct _FixedArray16<T> {
     T, T, T, T, T, T, T, T
   )
 
-  var _count: Int8
+//  var _count: Int8
 }
 
 extension _FixedArray16 {
@@ -37,8 +37,8 @@ extension _FixedArray16 {
   }
 
   internal var count: Int {
-    @inline(__always) get { return Int(truncatingIfNeeded: _count) }
-    @inline(__always) set { _count = Int8(newValue) }
+    @inline(__always) get { return 16 } // Int(truncatingIfNeeded: _count) }
+//    @inline(__always) set { _count = Int8(newValue) }
   }
 }
 
@@ -90,11 +90,11 @@ extension _FixedArray16: RandomAccessCollection, MutableCollection {
 }
 
 extension _FixedArray16 {
-  internal mutating func append(_ newElement: T) {
-    _internalInvariant(count < capacity)
-    _count += 1
-    self[count-1] = newElement
-  }
+  // internal mutating func append(_ newElement: T) {
+  //   _internalInvariant(count < capacity)
+  //   _count += 1
+  //   self[count-1] = newElement
+  // }
 }
 
 extension _FixedArray16 where T: ExpressibleByIntegerLiteral {
@@ -105,7 +105,7 @@ extension _FixedArray16 where T: ExpressibleByIntegerLiteral {
       0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0
     )
-    self._count = Int8(truncatingIfNeeded: count)
+    // self._count = Int8(truncatingIfNeeded: count)
   }
 
   @inline(__always)