From 15f6382666564b445f0354c3563c9944eb8fd5b1 Mon Sep 17 00:00:00 2001
From: Andrei Alexandrescu <andrei@erdani.com>
Date: Wed, 5 May 2021 13:23:44 -0400
Subject: [PATCH] Use alias assignment in Stride

---
 std/meta.d | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/std/meta.d b/std/meta.d
index 2ec601276f8..f8d59f693f2 100644
--- a/std/meta.d
+++ b/std/meta.d
@@ -1691,23 +1691,16 @@ Returns: An `AliasSeq` filtered by the selected stride.
 template Stride(int stepSize, Args...)
 if (stepSize != 0)
 {
-    static if (Args.length == 0)
+    alias Stride = AliasSeq!();
+    static if (stepSize > 0)
     {
-        alias Stride = AliasSeq!();
-    }
-    else static if (stepSize > 0)
-    {
-        static if (stepSize >= Args.length)
-            alias Stride = AliasSeq!(Args[0]);
-        else
-            alias Stride = AliasSeq!(Args[0], Stride!(stepSize, Args[stepSize .. $]));
+        static foreach (i; 0 .. (Args.length + stepSize - 1) / stepSize)
+            Stride = AliasSeq!(Stride, Args[i * stepSize]);
     }
     else
     {
-        static if (-stepSize >= Args.length)
-            alias Stride = AliasSeq!(Args[$ - 1]);
-        else
-            alias Stride = AliasSeq!(Args[$ - 1], Stride!(stepSize, Args[0 .. $ + stepSize]));
+        static foreach (i; 0 .. (Args.length - stepSize - 1) / -stepSize)
+            Stride = AliasSeq!(Stride, Args[$ - 1 + i * stepSize]);
     }
 }