Support std::filesystem::path in Arcadia streams

ref:11bbdd83544b9579747dd12d51395840bda86faf

5 files changed, 34 insertions, 3 deletions

diff --git a/build/ymake.core.conf b/build/ymake.core.conf
index 97ffbb8c39..f515d457a3 100644
--- a/build/ymake.core.conf
+++ b/build/ymake.core.conf
@@ -1334,6 +1334,9 @@ module _BASE_UNIT: _BARE_UNIT {
     when ($USE_INTERNAL_STL == "yes" && $MSVC != "yes") {
         CXXFLAGS += -nostdinc++
     }
+    otherwise {
+        CFLAGS += -DUSE_STL_SYSTEM
+    }
 
     when ($CODENAVIGATION && $NOCODENAVIGATION != "yes") {
         PEERDIR += build/external_resources/codenavigation
diff --git a/contrib/libs/cxxsupp/libcxx/src/filesystem/filesystem_common.h b/contrib/libs/cxxsupp/libcxx/src/filesystem/filesystem_common.h
index a5f5749783..9c6fdf34f6 100644
--- a/contrib/libs/cxxsupp/libcxx/src/filesystem/filesystem_common.h
+++ b/contrib/libs/cxxsupp/libcxx/src/filesystem/filesystem_common.h
@@ -128,6 +128,16 @@ size_t error_value<size_t>() {
   return size_t(-1);
 }
 #endif
+
+#if defined(_MSC_VER) && !defined(__clang__) && defined(_M_IX86)
+// FIXME thegeorg@ MSVC on i686 somehow depends on this function presence.
+// Further investigation is needed in order to understand the logic behind this.
+template <>
+unsigned int error_value<unsigned int>() {
+  return unsigned int(-1);
+}
+#endif
+
 template <>
 uintmax_t error_value<uintmax_t>() {
   return uintmax_t(-1);
diff --git a/util/stream/output.cpp b/util/stream/output.cpp
index db81b81b70..d84b3ad4d0 100644
--- a/util/stream/output.cpp
+++ b/util/stream/output.cpp
@@ -16,9 +16,10 @@
 #endif
 
 #include <cerrno>
+#include <cstdio>
+#include <filesystem>
 #include <string>
 #include <string_view>
-#include <cstdio>
 
 #if defined(_win_)
     #include <io.h>
@@ -114,6 +115,14 @@ void Out<std::u32string_view>(IOutputStream& o, const std::u32string_view& p) {
     WriteString(o, p.data(), p.length());
 }
 
+#ifndef USE_STL_SYSTEM
+// FIXME thegeorg@: remove #ifndef upon raising minimal macOS version to 10.15 in https://st.yandex-team.ru/DTCC-836
+template <>
+void Out<std::filesystem::path>(IOutputStream& o, const std::filesystem::path& p) {
+    o.Write(p.string());
+}
+#endif
+
 template <>
 void Out<TStringBuf>(IOutputStream& o, const TStringBuf& p) {
     o.Write(p.data(), p.length());
diff --git a/util/string/cast.cpp b/util/string/cast.cpp
index 939a3e7a92..4cd940f57b 100644
--- a/util/string/cast.cpp
+++ b/util/string/cast.cpp
@@ -4,9 +4,10 @@
     #define __LONG_LONG_SUPPORTED
 #endif
 
+#include <cmath>
 #include <cstdio>
+#include <filesystem>
 #include <string>
-#include <cmath>
 
 #include <util/string/type.h>
 #include <util/string/cast.h>
@@ -531,6 +532,14 @@ std::string FromStringImpl<std::string>(const char* data, size_t len) {
     return std::string(data, len);
 }
 
+#ifndef USE_STL_SYSTEM
+// FIXME thegeorg@: remove #ifndef upon raising minimal macOS version to 10.15 in https://st.yandex-team.ru/DTCC-836
+template <>
+std::filesystem::path FromStringImpl<std::filesystem::path>(const char* data, size_t len) {
+    return std::filesystem::path(std::string(data, len));
+}
+#endif
+
 template <>
 TUtf16String FromStringImpl<TUtf16String>(const wchar16* data, size_t len) {
     return TUtf16String(data, len);
diff --git a/util/system/filemap.h b/util/system/filemap.h
index edae96228b..f66b70c96c 100644
--- a/util/system/filemap.h
+++ b/util/system/filemap.h
@@ -296,7 +296,7 @@ public:
     TMappedAllocation(TMappedAllocation&& other) noexcept {
         this->swap(other);
     }
-    TMappedAllocation& operator = (TMappedAllocation&& other)noexcept {
+    TMappedAllocation& operator=(TMappedAllocation&& other) noexcept {
         this->swap(other);
         return *this;
     }