From ff58b5e81c432157a799445d1b7075ce47efa5a2 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Wed, 24 Oct 2018 08:14:15 +0200
Subject: [PATCH] Add algorithm.mutation.initializeAll

---
 source/tanya/algorithm/mutation.d | 52 +++++++++++++++++++++++++++++++
 source/tanya/container/array.d    |  2 +-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/source/tanya/algorithm/mutation.d b/source/tanya/algorithm/mutation.d
index 550afdd..49539d1 100644
--- a/source/tanya/algorithm/mutation.d
+++ b/source/tanya/algorithm/mutation.d
@@ -509,3 +509,55 @@ if (isInputRange!Range && hasLvalueElements!Range
     uninitializedFill(actual[], 1);
     assert(equal(actual[], expected[]));
 }
+
+/**
+ * Initializes all elements of the $(D_PARAM range) assuming that they are
+ * uninitialized.
+ *
+ * Params:
+ *  Range = Input range type
+ *  range = Input range.
+ */
+void initializeAll(Range)(Range range) @trusted
+if (isInputRange!Range && hasLvalueElements!Range)
+{
+    import tanya.memory.op : copy, fill;
+    alias T = ElementType!Range;
+
+    static if (__VERSION__ >= 2083
+            && isDynamicArray!Range
+            && __traits(isZeroInit, T))
+    {
+        fill!0(range);
+    }
+    else
+    {
+        static immutable init = T.init;
+        for (; !range.empty; range.popFront())
+        {
+            copy((&init)[0 .. 1], (&range.front)[0 .. 1]);
+        }
+    }
+}
+
+///
+@nogc nothrow pure @safe unittest
+{
+    import tanya.algorithm.comparison : equal;
+
+    int[2] actual = void;
+    const int[2] expected = [0, 0];
+
+    initializeAll(actual[]);
+    assert(equal(actual[], expected[]));
+}
+
+@nogc nothrow pure @safe unittest
+{
+    static struct NonCopyable
+    {
+        @disable this(this);
+    }
+    NonCopyable[] nonCopyable;
+    initializeAll(nonCopyable);
+}
diff --git a/source/tanya/container/array.d b/source/tanya/container/array.d
index 17082d1..57ea482 100644
--- a/source/tanya/container/array.d
+++ b/source/tanya/container/array.d
@@ -15,7 +15,7 @@
 module tanya.container.array;
 
 import core.checkedint;
-import std.algorithm.mutation : bringToFront, initializeAll;
+import std.algorithm.mutation : bringToFront;
 import tanya.algorithm.comparison;
 import tanya.algorithm.mutation;
 import tanya.exception;