OV file path definition

src/common/util/include/openvino/util/cpp_version.hpp

@@ -0,0 +1,35 @@
+// Copyright (C) 2018-2024 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#pragma once
+/**
+ * @brief Define a separate value for every version of C++ standard upto currently supported by build setup.
+ */
+#if !(defined(_MSC_VER) && __cplusplus == 199711L)
+#    if __cplusplus >= 201103L
+#        define OPENVINO_CPP_VER_AT_LEAST_11
+#        if __cplusplus >= 201402L
+#            define OPENVINO_CPP_VER_AT_LEAST_14
+#            if __cplusplus >= 201703L
+#                define OPENVINO_CPP_VER_AT_LEAST_17
+#                if __cplusplus >= 202002L
+#                    define OPENVINO_CPP_VER_AT_LEAST_20
+#                endif
+#            endif
+#        endif
+#    endif
+#elif defined(_MSC_VER) && __cplusplus == 199711L
+#    if _MSVC_LANG >= 201103L
+#        define OPENVINO_CPP_VER_AT_LEAST_11
+#        if _MSVC_LANG >= 201402L
+#            define OPENVINO_CPP_VER_AT_LEAST_14
+#            if _MSVC_LANG >= 201703L
+#                define OPENVINO_CPP_VER_AT_LEAST_17
+#                if _MSVC_LANG >= 202002L
+#                    define OPENVINO_CPP_VER_AT_LEAST_20
+#                endif
+#            endif
+#        endif
+#    endif
+#endif

src/common/util/include/openvino/util/file_path.hpp

@@ -0,0 +1,20 @@
+// Copyright (C) 2018-2024 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#pragma once
+
+#include <cstdio>
+
+#include "openvino/util/filesystem.hpp"
+namespace ov {
+namespace util {
+
+#if defined(OPENVINO_HAS_FILESYSTEM)
+using Path = std::filesystem::path;
+#elif defined(OPENVINO_HAS_EXP_FILESYSTEM)
+using Path = std::experimental::filesystem::path;
+#endif
+
+}  // namespace util
+}  // namespace ov

src/common/util/include/openvino/util/filesystem.hpp

@@ -4,28 +4,26 @@
 
 #pragma once
 
-#include "openvino/core/visibility.hpp"
+#include "openvino/util/cpp_version.hpp"
 
-#if defined(_MSC_VER) && defined(OPENVINO_CPP_VER_11)
+#if defined(_MSC_VER) && defined(OPENVINO_CPP_VER_AT_LEAST_11)
 #    define OPENVINO_HAS_EXP_FILESYSTEM
 #    define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
 #    define _LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM
 #elif defined(__has_include)
-#    if defined(OPENVINO_CPP_VER_17) && (__has_include(<filesystem>)) && (!__has_include(<experimental/filesystem>))
+#    if defined(OPENVINO_CPP_VER_AT_LEAST_17) && (__has_include(<filesystem>)) && (!__has_include(<experimental/filesystem>))
 #        define OPENVINO_HAS_FILESYSTEM
-#    elif defined(OPENVINO_CPP_VER_11) && (__has_include(<experimental/filesystem>))
+#    elif defined(OPENVINO_CPP_VER_AT_LEAST_11) && (__has_include(<experimental/filesystem>))
 #        define OPENVINO_HAS_EXP_FILESYSTEM
 #        define _SILENCE_EXPERIMENTAL_FILESYSTEM_DEPRECATION_WARNING
 #        define _LIBCPP_NO_EXPERIMENTAL_DEPRECATION_WARNING_FILESYSTEM
 #    endif
 #endif
 
-#if !defined(OPENVINO_HAS_FILESYSTEM) && !defined(OPENVINO_HAS_EXP_FILESYSTEM)
-#    error "Neither #include <filesystem> nor #include <experimental/filesystem> is available."
-#elif defined(OPENVINO_HAS_FILESYSTEM)
+#if defined(OPENVINO_HAS_FILESYSTEM)
 #    include <filesystem>
-namespace std_fs = std::filesystem;
 #elif defined(OPENVINO_HAS_EXP_FILESYSTEM)
 #    include <experimental/filesystem>
-namespace std_fs = std::experimental::filesystem;
+#else
+#    error "Neither #include <filesystem> nor #include <experimental/filesystem> is available."
 #endif

src/core/include/openvino/core/visibility.hpp

@@ -77,31 +77,3 @@
 #else
 #    define OV_NO_DANGLING
 #endif
-
-#if !(defined(_MSC_VER) && __cplusplus == 199711L)
-#    if __cplusplus >= 201103L
-#        define OPENVINO_CPP_VER_11
-#        if __cplusplus >= 201402L
-#            define OPENVINO_CPP_VER_14
-#            if __cplusplus >= 201703L
-#                define OPENVINO_CPP_VER_17
-#                if __cplusplus >= 202002L
-#                    define OPENVINO_CPP_VER_20
-#                endif
-#            endif
-#        endif
-#    endif
-#elif defined(_MSC_VER) && __cplusplus == 199711L
-#    if _MSVC_LANG >= 201103L
-#        define OPENVINO_CPP_VER_11
-#        if _MSVC_LANG >= 201402L
-#            define OPENVINO_CPP_VER_14
-#            if _MSVC_LANG >= 201703L
-#                define OPENVINO_CPP_VER_17
-#                if _MSVC_LANG >= 202002L
-#                    define OPENVINO_CPP_VER_20
-#                endif
-#            endif
-#        endif
-#    endif
-#endif

src/core/tests/file_util.cpp

@@ -11,6 +11,8 @@
 #include <string>
 #include <vector>
 
+#include "openvino/util/file_path.hpp"
+
 using namespace std;
 using namespace ov;
 
@@ -167,3 +169,220 @@ TEST_F(TrimFileTest, relatice_path_to_source_forward_slash_always_supported) {
     auto str_ptr = ov::util::trim_file_name(file_path.c_str());
     EXPECT_EQ(exp_path, str_ptr);
 }
+
+TEST(file_util, path_cast) {
+    // from char to char
+    EXPECT_STREQ("", ov::util::Path("").string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path("file.txt").string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path("./local/file.txt").string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path("~/local/file.txt").string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path("/usr/local/file.txt").string().c_str());
+    EXPECT_STREQ("C:\\Users\\file.txt", ov::util::Path("C:\\Users\\file.txt").string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").string().c_str());
+
+    // from char8_t to char
+    EXPECT_STREQ("", ov::util::Path(u8"").string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path(u8"file.txt").string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path(u8"./local/file.txt").string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path(u8"~/local/file.txt").string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path(u8"/usr/local/file.txt").string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").string().c_str());
+
+    // from char16_t to char
+    EXPECT_STREQ("", ov::util::Path(u"").string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path(u"file.txt").string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path(u"./local/file.txt").string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path(u"~/local/file.txt").string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path(u"/usr/local/file.txt").string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").string().c_str());
+
+    // from char32_t to char
+    EXPECT_STREQ("", ov::util::Path(U"").string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path(U"file.txt").string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path(U"./local/file.txt").string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path(U"~/local/file.txt").string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path(U"/usr/local/file.txt").string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").string().c_str());
+
+    // from char to wchar_t
+    EXPECT_STREQ(L"", ov::util::Path("").wstring().c_str());
+    EXPECT_STREQ(L"file.txt", ov::util::Path("file.txt").wstring().c_str());
+    EXPECT_STREQ(L"./local/file.txt", ov::util::Path("./local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/local/file.txt", ov::util::Path("~/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"/usr/local/file.txt", ov::util::Path("/usr/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"C:\\Users\\file.txt", ov::util::Path("C:\\Users\\file.txt").wstring().c_str());
+
+    // from char8_t to wchar_t
+    EXPECT_STREQ(L"", ov::util::Path(u8"").wstring().c_str());
+    EXPECT_STREQ(L"file.txt", ov::util::Path(u8"file.txt").wstring().c_str());
+    EXPECT_STREQ(L"./local/file.txt", ov::util::Path(u8"./local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/local/file.txt", ov::util::Path(u8"~/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"/usr/local/file.txt", ov::util::Path(u8"/usr/local/file.txt").wstring().c_str());
+
+    // from char16_t to wchar_t
+    EXPECT_STREQ(L"", ov::util::Path(u"").wstring().c_str());
+    EXPECT_STREQ(L"file.txt", ov::util::Path(u"file.txt").wstring().c_str());
+    EXPECT_STREQ(L"./local/file.txt", ov::util::Path(u"./local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/local/file.txt", ov::util::Path(u"~/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"/usr/local/file.txt", ov::util::Path(u"/usr/local/file.txt").wstring().c_str());
+
+    // from char32_t to wchar_t
+    EXPECT_STREQ(L"", ov::util::Path(U"").wstring().c_str());
+    EXPECT_STREQ(L"file.txt", ov::util::Path(U"file.txt").wstring().c_str());
+    EXPECT_STREQ(L"./local/file.txt", ov::util::Path(U"./local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/local/file.txt", ov::util::Path(U"~/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"/usr/local/file.txt", ov::util::Path(U"/usr/local/file.txt").wstring().c_str());
+
+    // from char to u16string
+    EXPECT_EQ(u"", ov::util::Path("").u16string());
+    EXPECT_EQ(u"file.txt", ov::util::Path("file.txt").u16string());
+    EXPECT_EQ(u"./local/file.txt", ov::util::Path("./local/file.txt").u16string());
+    EXPECT_EQ(u"~/local/file.txt", ov::util::Path("~/local/file.txt").u16string());
+    EXPECT_EQ(u"/usr/local/file.txt", ov::util::Path("/usr/local/file.txt").u16string());
+    EXPECT_EQ(u"C:\\Users\\file.txt", ov::util::Path("C:\\Users\\file.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+    // from char8_t to u16string
+    EXPECT_EQ(u"", ov::util::Path(u8"").u16string());
+    EXPECT_EQ(u"file.txt", ov::util::Path(u8"file.txt").u16string());
+    EXPECT_EQ(u"./local/file.txt", ov::util::Path(u8"./local/file.txt").u16string());
+    EXPECT_EQ(u"~/local/file.txt", ov::util::Path(u8"~/local/file.txt").u16string());
+    EXPECT_EQ(u"/usr/local/file.txt", ov::util::Path(u8"/usr/local/file.txt").u16string());
+    EXPECT_EQ(u"C:\\Users\\file.txt", ov::util::Path(u8"C:\\Users\\file.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+    // from char16_t to u16string
+    EXPECT_EQ(u"", ov::util::Path(u"").u16string());
+    EXPECT_EQ(u"file.txt", ov::util::Path(u"file.txt").u16string());
+    EXPECT_EQ(u"./local/file.txt", ov::util::Path(u"./local/file.txt").u16string());
+    EXPECT_EQ(u"~/local/file.txt", ov::util::Path(u"~/local/file.txt").u16string());
+    EXPECT_EQ(u"/usr/local/file.txt", ov::util::Path(u"/usr/local/file.txt").u16string());
+    EXPECT_EQ(u"C:\\Users\\file.txt", ov::util::Path(u"C:\\Users\\file.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+    // from char32_t to u16string
+    EXPECT_EQ(u"", ov::util::Path(U"").u16string());
+    EXPECT_EQ(u"file.txt", ov::util::Path(U"file.txt").u16string());
+    EXPECT_EQ(u"./local/file.txt", ov::util::Path(U"./local/file.txt").u16string());
+    EXPECT_EQ(u"~/local/file.txt", ov::util::Path(U"~/local/file.txt").u16string());
+    EXPECT_EQ(u"/usr/local/file.txt", ov::util::Path(U"/usr/local/file.txt").u16string());
+    EXPECT_EQ(u"C:\\Users\\file.txt", ov::util::Path(U"C:\\Users\\file.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+    // from char, char8_t, char16_t, char32_t to u16string
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+#ifndef MSVC
+    // error C2280: 'std::u32string std::experimental::filesystem::v1::path::u32string(void) const': attempting to
+    // reference a deleted function
+
+    // from char to u32string
+    EXPECT_EQ(U"", ov::util::Path("").u32string());
+    EXPECT_EQ(U"file.txt", ov::util::Path("file.txt").u32string());
+    EXPECT_EQ(U"./local/file.txt", ov::util::Path("./local/file.txt").u32string());
+    EXPECT_EQ(U"~/local/file.txt", ov::util::Path("~/local/file.txt").u32string());
+    EXPECT_EQ(U"/usr/local/file.txt", ov::util::Path("/usr/local/file.txt").u32string());
+    EXPECT_EQ(U"C:\\Users\\file.txt", ov::util::Path("C:\\Users\\file.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+
+    // from char8_t to u32string
+    EXPECT_EQ(U"", ov::util::Path(u8"").u32string());
+    EXPECT_EQ(U"file.txt", ov::util::Path(u8"file.txt").u32string());
+    EXPECT_EQ(U"./local/file.txt", ov::util::Path(u8"./local/file.txt").u32string());
+    EXPECT_EQ(U"~/local/file.txt", ov::util::Path(u8"~/local/file.txt").u32string());
+    EXPECT_EQ(U"/usr/local/file.txt", ov::util::Path(u8"/usr/local/file.txt").u32string());
+    EXPECT_EQ(U"C:\\Users\\file.txt", ov::util::Path(u8"C:\\Users\\file.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+
+    // from char16_t to u32string
+    EXPECT_EQ(U"", ov::util::Path(u"").u32string());
+    EXPECT_EQ(U"file.txt", ov::util::Path(u"file.txt").u32string());
+    EXPECT_EQ(U"./local/file.txt", ov::util::Path(u"./local/file.txt").u32string());
+    EXPECT_EQ(U"~/local/file.txt", ov::util::Path(u"~/local/file.txt").u32string());
+    EXPECT_EQ(U"/usr/local/file.txt", ov::util::Path(u"/usr/local/file.txt").u32string());
+    EXPECT_EQ(U"C:\\Users\\file.txt", ov::util::Path(u"C:\\Users\\file.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+
+    // from char32_t to u32string
+    EXPECT_EQ(U"", ov::util::Path(U"").u32string());
+    EXPECT_EQ(U"file.txt", ov::util::Path(U"file.txt").u32string());
+    EXPECT_EQ(U"./local/file.txt", ov::util::Path(U"./local/file.txt").u32string());
+    EXPECT_EQ(U"~/local/file.txt", ov::util::Path(U"~/local/file.txt").u32string());
+    EXPECT_EQ(U"/usr/local/file.txt", ov::util::Path(U"/usr/local/file.txt").u32string());
+    EXPECT_EQ(U"C:\\Users\\file.txt", ov::util::Path(U"C:\\Users\\file.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+
+    // from char, char8_t, char16_t, char32_t to u32string
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+#endif
+
+#if (!(defined(__GNUC__) && (__GNUC__ < 12 || __GNUC__ == 12 && __GNUC_MINOR__ < 3)) && \
+     !(defined(__clang__) && __clang_major__ < 17))
+    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95048
+    // https://stackoverflow.com/questions/58521857/cross-platform-way-to-handle-stdstring-stdwstring-with-stdfilesystempath
+
+    // from wchar_t to char
+    EXPECT_STREQ("", ov::util::Path(L"").string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path(L"file.txt").string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path(L"./local/file.txt").string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path(L"~/local/file.txt").string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path(L"/usr/local/file.txt").string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").string().c_str());
+
+    // from wchar_t to wchar_t
+    EXPECT_STREQ(L"", ov::util::Path(L"").wstring().c_str());
+    EXPECT_STREQ(L"file.txt", ov::util::Path(L"file.txt").wstring().c_str());
+    EXPECT_STREQ(L"./local/file.txt", ov::util::Path(L"./local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/local/file.txt", ov::util::Path(L"~/local/file.txt").wstring().c_str());
+    EXPECT_STREQ(L"/usr/local/file.txt", ov::util::Path(L"/usr/local/file.txt").wstring().c_str());
+
+    // from wchar_t to char8_t
+    EXPECT_STREQ("", ov::util::Path(L"").u8string().c_str());
+    EXPECT_STREQ("file.txt", ov::util::Path(L"file.txt").u8string().c_str());
+    EXPECT_STREQ("./local/file.txt", ov::util::Path(L"./local/file.txt").u8string().c_str());
+    EXPECT_STREQ("~/local/file.txt", ov::util::Path(L"~/local/file.txt").u8string().c_str());
+    EXPECT_STREQ("/usr/local/file.txt", ov::util::Path(L"/usr/local/file.txt").u8string().c_str());
+    EXPECT_STREQ("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u8string().c_str());
+
+    // from wchar_t to char16_t
+    EXPECT_EQ(u"", ov::util::Path(L"").u16string());
+    EXPECT_EQ(u"file.txt", ov::util::Path(L"file.txt").u16string());
+    EXPECT_EQ(u"./local/file.txt", ov::util::Path(L"./local/file.txt").u16string());
+    EXPECT_EQ(u"~/local/file.txt", ov::util::Path(L"~/local/file.txt").u16string());
+    EXPECT_EQ(u"/usr/local/file.txt", ov::util::Path(L"/usr/local/file.txt").u16string());
+    EXPECT_EQ(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u16string());
+
+#    ifndef MSVC
+    // error C2280: 'std::u32string std::experimental::filesystem::v1::path::u32string(void) const': attempting to
+    // reference a deleted function
+    //  from wchar_t to char32_t
+    EXPECT_EQ(U"", ov::util::Path(L"").u32string());
+    EXPECT_EQ(U"file.txt", ov::util::Path(L"file.txt").u32string());
+    EXPECT_EQ(U"./local/file.txt", ov::util::Path(L"./local/file.txt").u32string());
+    EXPECT_EQ(U"~/local/file.txt", ov::util::Path(L"~/local/file.txt").u32string());
+    EXPECT_EQ(U"/usr/local/file.txt", ov::util::Path(L"/usr/local/file.txt").u32string());
+    EXPECT_EQ(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt", ov::util::Path(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").u32string());
+#    endif
+
+    // from char, char8_t, char16_t, char32_t to wchar_t
+    EXPECT_STREQ(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path("~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").wstring().c_str());
+    EXPECT_STREQ(L"/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(u8"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").wstring().c_str());
+    EXPECT_STREQ(L"/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(u"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").wstring().c_str());
+    EXPECT_STREQ(L"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt",
+                 ov::util::Path(U"~/狗/ǡ୫ԩϗ/にほ/ąę/ど/௸ඊƷ/狗.txt").wstring().c_str());
+#endif
+}