From 9da868abbe640297a81c8a5e32cdc7f7776c295e Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 3 Jan 2022 17:10:57 +0000
Subject: Add transform_array

Wraps std::transform to transform one array into another.
---
 lib/util.cpp |  1 +
 lib/util.h   | 14 ++++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 lib/util.cpp
 create mode 100644 lib/util.h

(limited to 'lib')

diff --git a/lib/util.cpp b/lib/util.cpp
new file mode 100644
index 0000000..408a76a
--- /dev/null
+++ b/lib/util.cpp
@@ -0,0 +1 @@
+#include "util.h"
diff --git a/lib/util.h b/lib/util.h
new file mode 100644
index 0000000..290492f
--- /dev/null
+++ b/lib/util.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <algorithm> // IWYU pragma: keep
+#include <array>
+#include <cstddef>
+
+template<typename T, std::size_t N>
+constexpr auto
+transform_array(const std::array<T, N> & in, auto && transform)
+{
+	std::array<decltype(transform(in.front())), N> out {};
+	std::transform(in.begin(), in.end(), out.begin(), transform);
+	return out;
+}
-- 
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