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author George L. Albany <Megacake1234@gmail.com>2023-10-12 16:21:38 +0200
committer GitHub <noreply@github.com>2023-10-12 16:21:38 +0200
commitbb22324da1225a0ac458c1d69893bb3bd28bd6b7 (patch)
treeefeebd80a707a07eda296883772140e9ce32a9ee /src
parent1d113b46161f27551bc3a6a857b8727cfb657b81 (diff)
parent5c7af98e3a8a3e7f1462e389c273566d7cdaa5d4 (diff)
Merge pull request #43 from OpenVicProject/add/vdf-search
Diffstat (limited to 'src')
-rw-r--r--src/openvic-simulation/dataloader/Dataloader.cpp303
-rw-r--r--src/openvic-simulation/dataloader/Dataloader.hpp34
-rw-r--r--src/openvic-simulation/dataloader/Dataloader_Windows.hpp162
-rw-r--r--src/openvic-simulation/utility/ConstexprIntToStr.hpp56
4 files changed, 555 insertions, 0 deletions
diff --git a/src/openvic-simulation/dataloader/Dataloader.cpp b/src/openvic-simulation/dataloader/Dataloader.cpp
index 6469b63..70164c3 100644
--- a/src/openvic-simulation/dataloader/Dataloader.cpp
+++ b/src/openvic-simulation/dataloader/Dataloader.cpp
@@ -1,16 +1,319 @@
#include "Dataloader.hpp"
+#include <array>
+#include <cstdlib>
+#include <filesystem>
+#include <optional>
+#include <string_view>
+#include <system_error>
+#include <type_traits>
+#include <variant>
+
#include <openvic-dataloader/csv/Parser.hpp>
#include <openvic-dataloader/detail/CallbackOStream.hpp>
#include <openvic-dataloader/v2script/Parser.hpp>
+#include <lexy-vdf/KeyValues.hpp>
+#include <lexy-vdf/Parser.hpp>
+
#include "openvic-simulation/GameManager.hpp"
+#include "openvic-simulation/utility/ConstexprIntToStr.hpp"
#include "openvic-simulation/utility/Logger.hpp"
+#ifdef _WIN32
+#include <Windows.h>
+#include "Dataloader_Windows.hpp"
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <TargetConditionals.h>
+#endif
+
using namespace OpenVic;
using namespace OpenVic::NodeTools;
using namespace ovdl;
+// Windows and Mac by default act like case insensitive filesystems
+constexpr bool path_equals(std::string_view lhs, std::string_view rhs) {
+#if defined(_WIN32) || (defined(__APPLE__) && defined(__MACH__))
+ constexpr auto ichar_equals = [](unsigned char l, unsigned char r) {
+ return std::tolower(l) == std::tolower(r);
+ };
+ return std::equal(lhs.begin(), lhs.end(), rhs.begin(), rhs.end(), ichar_equals);
+#else
+ return std::equal(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
+#endif
+}
+
+template<typename LT, typename RT>
+constexpr bool filename_equals(const LT& lhs, const RT& rhs) {
+ std::string_view left, right;
+ if constexpr (std::same_as<LT, std::filesystem::path>)
+ left = lhs.filename().string();
+ else left = lhs;
+
+ if constexpr (std::same_as<RT, std::filesystem::path>)
+ right = rhs.filename().string();
+ else right = rhs;
+
+ return path_equals(left, right);
+}
+
+fs::path _search_for_game_path(fs::path hint_path = {}) {
+ // Apparently max amount of steam libraries is 8, if incorrect please correct it to the correct max amount
+ constexpr int max_amount_of_steam_libraries = 8;
+ constexpr std::string_view Victoria_2_folder = "Victoria 2";
+ constexpr std::string_view v2_game_exe = "v2game.exe";
+ constexpr std::string_view steamapps = "steamapps";
+ constexpr std::string_view libraryfolders = "libraryfolders.vdf";
+ constexpr std::string_view vic2_appmanifest = "appmanifest_42960.acf";
+ constexpr std::string_view common_folder = "common";
+
+ std::error_code error_code;
+
+ // Don't waste time trying to search for Victoria 2 when supplied a valid looking Victoria 2 game directory
+ if (filename_equals(Victoria_2_folder, hint_path)) {
+ if (fs::is_regular_file(hint_path / v2_game_exe, error_code))
+ return hint_path;
+ }
+
+ const bool hint_path_was_empty = hint_path.empty();
+ if (hint_path_was_empty) {
+#if defined(_WIN32)
+ static const fs::path registry_path = Windows::ReadRegValue<char>(HKEY_LOCAL_MACHINE, "SOFTWARE\\WOW6432Node\\Paradox Interactive\\Victoria 2", "path");
+
+ if (!registry_path.empty())
+ return registry_path;
+
+ #pragma warning(push)
+ #pragma warning(disable: 4996)
+ static const fs::path prog_files = std::string(std::getenv("ProgramFiles"));
+ hint_path = prog_files / "Steam";
+ if (!fs::is_directory(hint_path, error_code)) {
+ static const fs::path prog_files_x86 = std::string(std::getenv("ProgramFiles(x86)"));
+ hint_path = prog_files_x86 / "Steam";
+ if (!fs::is_directory(hint_path, error_code)) {
+ Logger::warning("Could not find path for Steam installation on Windows.");
+ return "";
+ }
+ }
+ #pragma warning(pop)
+// Cannot support Android
+// Only FreeBSD currently unofficially supports emulating Linux
+#elif (defined(__linux__) && !defined(__ANDROID__)) || defined(__FreeBSD__)
+ static const fs::path home = std::getenv("HOME");
+ hint_path = home / ".steam" / "steam";
+ if (fs::is_symlink(hint_path, error_code))
+ hint_path = fs::read_symlink(hint_path, error_code);
+ else if (!fs::is_directory(hint_path, error_code)) {
+ hint_path = home / ".local" / "share" / "Steam";
+ if (!fs::is_directory(hint_path, error_code)) {
+#ifdef __FreeBSD__
+ Logger::warning("Could not find path for Steam installation on FreeBSD.");
+#else
+ Logger::warning("Could not find path for Steam installation on Linux.");
+#endif
+ return "";
+ }
+ }
+// Support only Mac, cannot support iOS
+#elif (defined(__APPLE__) && defined(__MACH__)) && TARGET_OS_MAC == 1
+ static const fs::path home = std::getenv("HOME");
+ hint_path = home / "Library" / "Application Support" / "Steam";
+ if (!fs::is_directory(hint_path, error_code)) {
+ Logger::warning("Could not find path for Steam installation on Mac.");
+ return "";
+ }
+// All platforms that reach this point do not seem to even have unofficial Steam support
+#else
+ Logger::warning("Could not find path for Steam installation on unsupported platform.");
+#endif
+ }
+
+ // Could not determine Steam install on platform
+ if (hint_path.empty()) return "";
+
+ // Supplied path was useless, ignore hint_path
+ if (!hint_path_was_empty && !fs::exists(hint_path, error_code))
+ return _search_for_game_path();
+
+ // Steam Library's directory that will contain Victoria 2
+ fs::path vic2_steam_lib_directory;
+ fs::path current_path = hint_path;
+
+ // If hinted path is directory that contains steamapps
+ bool is_steamapps = false;
+ if (fs::is_directory(current_path / steamapps, error_code)) {
+ current_path /= steamapps;
+ is_steamapps = true;
+ }
+
+ // If hinted path is steamapps directory
+ bool is_libraryfolders_vdf = false;
+ if (is_steamapps || (filename_equals(steamapps, current_path) && fs::is_directory(current_path, error_code))) {
+ current_path /= libraryfolders;
+ is_libraryfolders_vdf = true;
+ }
+
+ bool vic2_install_confirmed = false;
+ // if current_path is not a regular file, this is a non-default Steam Library, skip this parser evaluation
+ if (fs::is_regular_file(current_path, error_code) && (is_libraryfolders_vdf || filename_equals(libraryfolders, current_path))) {
+ lexy_vdf::Parser parser;
+
+ std::string buffer;
+ auto error_log_stream = detail::CallbackStream {
+ [](void const* s, std::streamsize n, void* user_data) -> std::streamsize {
+ if (s != nullptr && n > 0 && user_data != nullptr) {
+ static_cast<std::string*>(user_data)->append(static_cast<char const*>(s), n);
+ return n;
+ } else {
+ Logger::warning("Invalid input to parser error log callback: ", s, " / ", n, " / ", user_data);
+ return 0;
+ }
+ },
+ &buffer
+ };
+ parser.set_error_log_to(error_log_stream);
+
+ parser.load_from_file(current_path);
+ if (!parser.parse()) {
+ // Could not find or load libraryfolders.vdf, report error as warning
+ if (!buffer.empty())
+ Logger::warning _(buffer);
+ return "";
+ }
+ std::optional current_node = *(parser.get_key_values());
+
+ // check "libraryfolders" list
+ auto it = current_node.value().find("libraryfolders");
+ if (it == current_node.value().end()) {
+ Logger::warning("Expected libraryfolders.vdf to contain a libraryfolders key.");
+ return "";
+ }
+
+ static constexpr auto visit_node = [](auto&& arg) -> std::optional<lexy_vdf::KeyValues> {
+ using T = std::decay_t<decltype(arg)>;
+ if constexpr (std::is_same_v<T, lexy_vdf::KeyValues>) {
+ return arg;
+ } else {
+ return std::nullopt;
+ }
+ };
+
+ current_node = std::visit(visit_node, it->second);
+
+ if (!current_node.has_value()) {
+ Logger::warning("Expected libraryfolders.vdf's libraryfolders key to be a KeyValue dictionary.");
+ return "";
+ }
+
+ // Array of strings contain "0" to std::to_string(max_amount_of_steam_libraries - 1)
+ static constexpr auto library_indexes = OpenVic::ConstexprIntToStr::make_itosv_array<max_amount_of_steam_libraries>();
+
+ for (const auto& index : library_indexes) {
+ decltype(current_node) node = std::nullopt;
+
+ auto it = current_node.value().find(index);
+ if (it != current_node.value().end()) {
+ node = std::visit(visit_node, it->second);
+ }
+
+ // check "apps" list
+ decltype(node) apps_node = std::nullopt;
+ if (node.has_value()) {
+ it = node.value().find("apps");
+ if (it != node.value().end()) {
+ apps_node = std::visit(visit_node, it->second);
+ }
+ }
+
+ bool lib_contains_victoria_2 = false;
+ if (apps_node.has_value()) {
+ lib_contains_victoria_2 = apps_node.value().find("42960") != node.value().end();
+ }
+
+ if (lib_contains_victoria_2) {
+ it = node.value().find("path");
+ if (it != node.value().end()) {
+ vic2_steam_lib_directory = std::visit(
+ [](auto&& arg) -> std::string_view {
+ using T = std::decay_t<decltype(arg)>;
+ if constexpr (std::is_same_v<T, std::string>) {
+ return arg;
+ } else {
+ return "";
+ }
+ },
+ it->second
+ );
+ vic2_install_confirmed = true;
+ break;
+ }
+ }
+ }
+
+ if (vic2_steam_lib_directory.empty()) {
+ Logger::info("Steam installation appears not to contain Victoria 2.");
+ return "";
+ }
+ }
+
+ // If current_path points to steamapps/libraryfolders.vdf
+ if (vic2_steam_lib_directory.empty()) {
+ if (is_libraryfolders_vdf || filename_equals(libraryfolders, current_path)) {
+ vic2_steam_lib_directory = current_path.parent_path() / vic2_appmanifest;
+ } else if (filename_equals(vic2_appmanifest, current_path)) {
+ vic2_steam_lib_directory = current_path;
+ }
+ }
+
+ // If we could not confirm Victoria 2 was installed via the default Steam installation
+ bool is_common_folder = false;
+ if (!vic2_install_confirmed) {
+ auto parser = lexy_vdf::Parser::from_file(vic2_steam_lib_directory);
+ if (!parser.parse()) {
+ // Could not find or load appmanifest_42960.acf, report error as warning
+ for(auto& error : parser.get_errors()) {
+ Logger::warning(error.message);
+ }
+ return "";
+ }
+
+ // we can pretty much assume the Victoria 2 directory on Steam is valid from here
+ vic2_steam_lib_directory /= common_folder;
+ is_common_folder = true;
+ } else if (fs::is_directory(vic2_steam_lib_directory / steamapps, error_code)) {
+ vic2_steam_lib_directory /= fs::path(steamapps) / common_folder;
+ is_common_folder = true;
+ }
+
+ bool is_Victoria_2_folder = false;
+ if ((is_common_folder || filename_equals(common_folder, vic2_steam_lib_directory)) &&
+ fs::is_directory(vic2_steam_lib_directory, error_code)) {
+ vic2_steam_lib_directory /= Victoria_2_folder;
+ is_Victoria_2_folder = true;
+ }
+ if ((is_Victoria_2_folder || filename_equals(Victoria_2_folder, vic2_steam_lib_directory)) &&
+ fs::is_regular_file(vic2_steam_lib_directory / v2_game_exe, error_code)) {
+ return vic2_steam_lib_directory;
+ }
+
+ // Hail Mary check ignoring the hint_path
+ if (!hint_path_was_empty)
+ return _search_for_game_path();
+
+ Logger::warning("Could not find Victoria 2 game path, this requires manually supplying one.");
+ return ""; // The supplied path fits literally none of the criteria
+}
+
+fs::path Dataloader::search_for_game_path(fs::path hint_path) {
+ auto it = _cached_paths.find(hint_path);
+ if (it != _cached_paths.end())
+ return it->second;
+
+ return _cached_paths[hint_path] = _search_for_game_path(hint_path);
+}
+
bool Dataloader::set_roots(path_vector_t new_roots) {
if (!roots.empty()) {
Logger::error("Overriding existing dataloader roots!");
diff --git a/src/openvic-simulation/dataloader/Dataloader.hpp b/src/openvic-simulation/dataloader/Dataloader.hpp
index 9d28132..705da00 100644
--- a/src/openvic-simulation/dataloader/Dataloader.hpp
+++ b/src/openvic-simulation/dataloader/Dataloader.hpp
@@ -1,6 +1,7 @@
#pragma once
#include <filesystem>
+#include <unordered_map>
#include <openvic-dataloader/csv/Parser.hpp>
#include <openvic-dataloader/v2script/Parser.hpp>
@@ -31,6 +32,25 @@ namespace OpenVic {
Dataloader() = default;
+ /// @brief Searches for the Victoria 2 install directory
+ ///
+ /// @param hint_path A path to indicate a hint to assist in searching for the Victoria 2 install directory
+ /// Supports being supplied:
+ /// 1. A valid Victoria 2 game directory (Victoria 2 directory that contains a v2game.exe file)
+ /// 2. An Empty path: assumes a common Steam install structure per platform.
+ /// 2b. If Windows, returns "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Paradox Interactive\Victoria 2" "path" registry value
+ /// 2c. If registry value returns an empty string, performs Steam checks below
+ /// 3. A path to a root Steam install. (eg: C:\Program Files(x86)\Steam, ~/.steam/steam)
+ /// 4. A path to a root Steam steamapps directory. (eg: C:\Program Files(x86)\Steam\steamapps, ~/.steam/steam/steamapps)
+ /// 5. A path to the root Steam libraryfolders.vdf, commonly in the root Steam steamapps directory.
+ /// 6. A path to the Steam library directory that contains Victoria 2.
+ /// 7. A path to a Steam library's steamapps directory that contains Victoria 2.
+ /// 8. A path to a Steam library's steamapps/common directory that contains Victoria 2.
+ /// 9. If any of these checks don't resolve to a valid Victoria 2 game directory when supplied a non-empty hint_path, performs empty path behavior.
+ /// @return fs::path The root directory of a valid Victoria 2 install, or an empty path.
+ ///
+ static fs::path search_for_game_path(fs::path hint_path = {});
+
/* In reverse-load order, so base defines first and final loaded mod last */
bool set_roots(path_vector_t new_roots);
@@ -55,5 +75,19 @@ namespace OpenVic {
/* Args: key, locale, localisation */
using localisation_callback_t = NodeTools::callback_t<std::string_view, locale_t, std::string_view>;
bool load_localisation_files(localisation_callback_t callback, fs::path const& localisation_dir = "localisation");
+
+ private:
+ struct fshash
+ {
+ size_t operator()(const std::filesystem::path& p) const noexcept {
+ return std::filesystem::hash_value(p);
+ }
+ };
+
+ using hint_path_t = fs::path;
+ using game_path_t = fs::path;
+ inline static std::unordered_map<hint_path_t, game_path_t, fshash> _cached_paths;
};
}
+
+
diff --git a/src/openvic-simulation/dataloader/Dataloader_Windows.hpp b/src/openvic-simulation/dataloader/Dataloader_Windows.hpp
new file mode 100644
index 0000000..f4abbb6
--- /dev/null
+++ b/src/openvic-simulation/dataloader/Dataloader_Windows.hpp
@@ -0,0 +1,162 @@
+#pragma once
+
+#include <concepts>
+#pragma comment(lib, "advapi32.lib")
+
+#include <string>
+#include <string_view>
+
+#include <Windows.h>
+
+namespace OpenVic::Windows {
+ inline std::wstring convert(std::string_view as) {
+ // deal with trivial case of empty string
+ if (as.empty()) return std::wstring();
+
+ // determine required length of new string
+ size_t length = ::MultiByteToWideChar(CP_UTF8, 0, as.data(), (int)as.length(), 0, 0);
+
+ // construct new string of required length
+ std::wstring ret(length, L'\0');
+
+ // convert old string to new string
+ ::MultiByteToWideChar(CP_UTF8, 0, as.data(), (int)as.length(), &ret[0], (int)ret.length());
+
+ // return new string ( compiler should optimize this away )
+ return ret;
+ }
+
+ inline std::string convert(std::wstring_view as) {
+ // deal with trivial case of empty string
+ if (as.empty()) return std::string();
+
+ // determine required length of new string
+ size_t length = ::WideCharToMultiByte(CP_UTF8, 0, as.data(), (int)as.length(), 0, 0, NULL, NULL);
+
+ // construct new string of required length
+ std::string ret(length, '\0');
+
+ // convert old string to new string
+ ::WideCharToMultiByte(CP_UTF8, 0, as.data(), (int)as.length(), &ret[0], (int)ret.length(), NULL, NULL);
+
+ // return new string ( compiler should optimize this away )
+ return ret;
+ }
+
+ template<typename T, typename... U>
+ concept any_of = (std::same_as<T, U> || ...);
+
+ template<typename T>
+ concept either_char_type = any_of<T, char, wchar_t>;
+
+ template<typename T>
+ concept has_data = requires(T t) {
+ { t.data() } -> std::convertible_to<const typename T::value_type*>;
+ };
+
+ class RegistryKey {
+ public:
+ RegistryKey(HKEY key_handle)
+ : _key_handle(key_handle) {
+ }
+
+ template<either_char_type CHAR_T, either_char_type CHAR_T2>
+ RegistryKey(HKEY parent_key_handle, std::basic_string_view<CHAR_T> child_key_name, std::basic_string_view<CHAR_T2> value_name) {
+ open_key(parent_key_handle, child_key_name);
+ query_key(value_name);
+ }
+
+ ~RegistryKey() {
+ close_key();
+ }
+
+ bool is_open() const {
+ return _key_handle != nullptr;
+ }
+
+ std::wstring_view value() const {
+ return _value;
+ }
+
+ template<either_char_type CHAR_T>
+ LSTATUS open_key(HKEY parent_key_handle, std::basic_string_view<CHAR_T> key_path) {
+ if (is_open())
+ close_key();
+ if constexpr (std::is_same_v<CHAR_T, char>)
+ return RegOpenKeyExW(parent_key_handle, convert(key_path).data(), REG_NONE, KEY_READ, &_key_handle);
+ else
+ return RegOpenKeyExW(parent_key_handle, key_path.data(), REG_NONE, KEY_READ, &_key_handle);
+ }
+
+ bool is_predefined() const {
+ return (_key_handle == HKEY_CURRENT_USER) ||
+ (_key_handle == HKEY_LOCAL_MACHINE) ||
+ (_key_handle == HKEY_CLASSES_ROOT) ||
+ (_key_handle == HKEY_CURRENT_CONFIG) ||
+ (_key_handle == HKEY_CURRENT_USER_LOCAL_SETTINGS) ||
+ (_key_handle == HKEY_PERFORMANCE_DATA) ||
+ (_key_handle == HKEY_PERFORMANCE_NLSTEXT) ||
+ (_key_handle == HKEY_PERFORMANCE_TEXT) ||
+ (_key_handle == HKEY_USERS);
+ }
+
+ LSTATUS close_key() {
+ if (!is_open() || is_predefined())
+ return ERROR_SUCCESS;
+ auto result = RegCloseKey(_key_handle);
+ _key_handle = nullptr;
+ return result;
+ }
+
+ template<either_char_type CHAR_T>
+ LSTATUS query_key(std::basic_string_view<CHAR_T> value_name) {
+ DWORD data_size;
+ DWORD type;
+
+ const auto& wide_value = [&value_name]() -> has_data auto {
+ if constexpr (std::is_same_v<CHAR_T, char>) {
+ return convert(value_name);
+ } else {
+ return value_name;
+ }
+ }();
+
+ auto result = RegQueryValueExW(_key_handle, wide_value.data(), NULL, &type, NULL, &data_size);
+ if (result != ERROR_SUCCESS || type != REG_SZ) {
+ close_key();
+ return result;
+ }
+ _value = std::wstring(data_size / sizeof(wchar_t), L'\0');
+ result = RegQueryValueExW(_key_handle, wide_value.data(), NULL, NULL, reinterpret_cast<LPBYTE>(_value.data()), &data_size);
+ close_key();
+
+ std::size_t first_null = _value.find_first_of(L'\0');
+ if (first_null != std::string::npos)
+ _value.resize(first_null);
+
+ return result;
+ }
+
+ private:
+ HKEY _key_handle = nullptr;
+ std::wstring _value;
+ };
+
+ template<either_char_type RCHAR_T, either_char_type CHAR_T, either_char_type CHAR_T2>
+ std::basic_string<RCHAR_T> ReadRegValue(HKEY root, std::basic_string_view<CHAR_T> key, std::basic_string_view<CHAR_T2> name) {
+ RegistryKey registry_key(root, key, name);
+ if constexpr (std::is_same_v<RCHAR_T, char>) {
+ return convert(registry_key.value());
+ } else {
+ return registry_key.value();
+ }
+ }
+
+ template<either_char_type RCHAR_T, either_char_type CHAR_T, either_char_type CHAR_T2>
+ std::basic_string<RCHAR_T> ReadRegValue(HKEY root, const CHAR_T* key, const CHAR_T2* name) {
+ auto key_sv = std::basic_string_view(key);
+ auto name_sv = std::basic_string_view(name);
+
+ return ReadRegValue<RCHAR_T>(root, key_sv, name_sv);
+ }
+} \ No newline at end of file
diff --git a/src/openvic-simulation/utility/ConstexprIntToStr.hpp b/src/openvic-simulation/utility/ConstexprIntToStr.hpp
new file mode 100644
index 0000000..e383365
--- /dev/null
+++ b/src/openvic-simulation/utility/ConstexprIntToStr.hpp
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <array>
+#include <cstddef>
+#include <string_view>
+#include <utility>
+
+namespace OpenVic::ConstexprIntToStr {
+ template<class T, T... values1, T... values2>
+ constexpr decltype(auto) append_sequence(std::integer_sequence<T, values1...>, std::integer_sequence<T, values2...>) {
+ return std::integer_sequence<T, values1..., values2...> {};
+ }
+
+ template<class sequence_t>
+ struct string_sequence_to_view;
+
+ template<char... chars>
+ struct string_sequence_to_view<std::integer_sequence<char, chars...>> {
+ static constexpr decltype(auto) get() {
+ return std::string_view { c_str };
+ }
+
+ static constexpr const char c_str[] { chars..., char {} };
+ };
+
+ template<std::size_t value>
+ constexpr decltype(auto) integer_to_string_sequence() {
+ constexpr auto digits = []() {
+ return "0123456789abcdefghijklmnopqrstuvwxyz";
+ };
+
+ constexpr std::size_t remainder = value % 10;
+ constexpr std::size_t next_value = value / 10;
+
+ if constexpr (next_value != 0) {
+ return append_sequence(integer_to_string_sequence<next_value>(), std::integer_sequence<char, digits()[remainder]> {});
+ } else {
+ return std::integer_sequence<char, digits()[remainder]> {};
+ }
+ }
+ template<std::size_t i>
+ constexpr std::string_view make_string() {
+ return string_sequence_to_view<decltype(integer_to_string_sequence<i>())> {}.c_str;
+ }
+
+ template<std::size_t... ManyIntegers>
+ constexpr auto generate_itosv_array(std::integer_sequence<std::size_t, ManyIntegers...>) {
+ return std::array<std::string_view, sizeof...(ManyIntegers)> { make_string<ManyIntegers>()... };
+ }
+
+ // Make array of N string views, countings up from 0 to N - 1
+ template<std::size_t N>
+ constexpr auto make_itosv_array() {
+ return generate_itosv_array(std::make_integer_sequence<std::size_t, N>());
+ }
+} \ No newline at end of file