[committed] libstdc++: Check conversion from filesystem::path to wide strings [PR95048]

[Jonathan Wakely via Gcc-patches]

Tested powerp64le-linux. Pushed to trunk. This can be backported too.

-- >8 --

The testcase added for this bug only checks conversion from wide strings
on construction, but the fix also covered conversion to wide stings via
path::wstring(). Add checks for that, and u16string() and u32string().

libstdc++-v3/ChangeLog:

        PR libstdc++/95048
        * testsuite/27_io/filesystem/path/construct/95048.cc: Check
        conversions to wide strings.
        * testsuite/experimental/filesystem/path/construct/95048.cc:
        Likewise.
---
 .../testsuite/27_io/filesystem/path/construct/95048.cc      | 6 ++++++
 .../experimental/filesystem/path/construct/95048.cc         | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/libstdc++-v3/testsuite/27_io/filesystem/path/construct/95048.cc 
b/libstdc++-v3/testsuite/27_io/filesystem/path/construct/95048.cc
index c1a382d1420..cd80d668b23 100644
--- a/libstdc++-v3/testsuite/27_io/filesystem/path/construct/95048.cc
+++ b/libstdc++-v3/testsuite/27_io/filesystem/path/construct/95048.cc
@@ -16,6 +16,8 @@ test_wide()
   VERIFY( CHECK(L, "\U0001F4C1") ); // folder
   VERIFY( CHECK(L, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(L, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").wstring() == L"\U0001D11E" ); // G Clef
 }
 
 void
@@ -25,6 +27,8 @@ test_u16()
   VERIFY( CHECK(u, "\U0001F4C1") ); // folder
   VERIFY( CHECK(u, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(u, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").u16string() == u"\U0001D11E" ); // G Clef
 }
 
 void
@@ -34,6 +38,8 @@ test_u32()
   VERIFY( CHECK(U, "\U0001F4C1") ); // folder
   VERIFY( CHECK(U, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(U, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").u32string() == U"\U0001D11E" ); // G Clef
 }
 
 int
diff --git 
a/libstdc++-v3/testsuite/experimental/filesystem/path/construct/95048.cc 
b/libstdc++-v3/testsuite/experimental/filesystem/path/construct/95048.cc
index b7a93f3c985..fc65bfecd4d 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/path/construct/95048.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/path/construct/95048.cc
@@ -18,6 +18,8 @@ test_wide()
   VERIFY( CHECK(L, "\U0001F4C1") ); // folder
   VERIFY( CHECK(L, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(L, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").wstring() == L"\U0001D11E" ); // G Clef
 }
 
 void
@@ -27,6 +29,8 @@ test_u16()
   VERIFY( CHECK(u, "\U0001F4C1") ); // folder
   VERIFY( CHECK(u, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(u, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").u16string() == u"\U0001D11E" ); // G Clef
 }
 
 void
@@ -36,6 +40,8 @@ test_u32()
   VERIFY( CHECK(U, "\U0001F4C1") ); // folder
   VERIFY( CHECK(U, "\U0001F4C2") ); // open folder
   VERIFY( CHECK(U, "\U0001F4C4") ); // filing cabient
+
+  VERIFY( path(u8"\U0001D11E").u32string() == U"\U0001D11E" ); // G Clef
 }
 
 int
-- 
2.41.0