Utils: Add C++ 20 converter function to_array

That can be quite useful to create arrays:

struct MyReallySpecialType
{
  std::string_view name;
  std::string_view expression;
};

std::string_view getExressionCArray(std::string_view name)
{
  static constexpr MyReallySpecialType list[] = {
    {"Left", "true"},
    {"Center", "execute(%1)"},
    {"Right", "false"}};

   auto found =std::find_if(
     std::begin(list),
     std::end(list),
     [&] (const auto &entry) { return entry.name == name; });

  if (found != std::end(list))
    return found->expression;

  return {};
}

std::string_view getExressionStdArray(std::string_view name)
{
  static constexpr auto list = Utils::to_array<MyReallySpecialType>({
    {"Left", "true"},
    {"Center", "execute(%1)"},
    {"Right", "false"}});

  auto found = std::find_if(
    std::begin(list),
    std::end(list),
    [&] (const auto &entry) { return entry.name == name; });

  if (found != std::end(list))
    return found->expression;

  return {};
}

Change-Id: Ifc737edb72d7a5f63b26203a5f22bfde19b5c2bc
Reviewed-by: Qt CI Patch Build Bot <ci_patchbuild_bot@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/utils/CMakeLists.txt

@@ -11,6 +11,7 @@ add_qtc_library(Utils
     ansiescapecodehandler.cpp ansiescapecodehandler.h
     appmainwindow.cpp appmainwindow.h
     archive.cpp archive.h
+    array.h
     aspects.cpp aspects.h
     async.cpp async.h
     basetreeview.cpp basetreeview.h

src/libs/utils/array.h

@@ -0,0 +1,23 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#pragma once
+
+namespace Utils {
+
+namespace Internal {
+template<typename Type, std::size_t size, std::size_t... index>
+constexpr std::array<std::remove_cv_t<Type>, size> to_array_implementation(
+    Type (&&array)[size], std::index_sequence<index...>)
+{
+    return {{std::move(array[index])...}};
+}
+} // namespace Internal
+
+template<typename Type, std::size_t size>
+constexpr std::array<std::remove_cv_t<Type>, size> to_array(Type (&&array)[size])
+{
+    return Internal::to_array_implementation(std::move(array), std::make_index_sequence<size>{});
+}
+
+} // namespace Utils