[gcc r15-10300] libstdc++: Document missing implementation defined behavior for std::filesystem.

[Tomasz Kaminski]

https://gcc.gnu.org/g:23109eeb4b815edb8685faf74ed9295307a36bfe

commit r15-10300-g23109eeb4b815edb8685faf74ed9295307a36bfe
Author: Tomasz Kamiński <tkaminsk@redhat.com>
Date:   Fri Sep 5 13:16:40 2025 +0200

    libstdc++: Document missing implementation defined behavior for std::filesystem.
    
    libstdc++-v3/ChangeLog:
    
            * doc/html/manual/status.html: Regenerate the file.
            * doc/xml/manual/status_cxx2017.xml: Addd more entires.
    
    Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
    Signed-off-by: Tomasz Kamiński <tkaminsk@redhat.com>
    (cherry picked from commit d6c370b8e96d43448537276d91c2b33fedb9754a)

Diff:
---
 libstdc++-v3/doc/html/manual/status.html       | 18 ++++++++++++++++--
 libstdc++-v3/doc/xml/manual/status_cxx2017.xml | 23 ++++++++++++++++++++---
 2 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/libstdc++-v3/doc/html/manual/status.html b/libstdc++-v3/doc/html/manual/status.html
index 81a41c6c96b7..93b6ad967990 100644
--- a/libstdc++-v3/doc/html/manual/status.html
+++ b/libstdc++-v3/doc/html/manual/status.html
@@ -1118,7 +1118,8 @@ since C++14 and the implementation is complete.
       The effect of calling the mathematical special functions with large
       inputs should be documented here.
    </p><p>
-      <span class="emphasis"><em>30.10.2.1 [fs.conform.9945]</em></span>
+      <span class="emphasis"><em>30.10.2.1 [fs.conform.9945]</em></span>,
+      <span class="emphasis"><em>30.10.2.2 [fs.conform.os]</em></span>
       The behavior of the filesystem library implementation will depend on
       the target operating system. Some features will not be supported
       on some targets. Symbolic links and file permissions
@@ -1154,7 +1155,20 @@ since C++14 and the implementation is complete.
       Specifically, it is not possible to rename a directory to replace another
       directory (POSIX requires that to work if the directory being
       replaced is empty).
-    </p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="iso.2017.par2ts"></a>Parallelism 2 TS</h5></div></div></div><p>
+   </p><p>
+      <span class="emphasis"><em>30.10.29.2 [fs.enum.file_type]</em></span>,
+      <span class="emphasis"><em>30.10.34.3 [fs.op.copy]</em></span>,
+      <span class="emphasis"><em>30.10.34.35 [fs.op.status]</em></span>
+      No additional file types are supported, and there are no
+      implementation-defined enumerators in
+      <code class="code">std::filesystem::file_type</code>.
+   </p><p>
+     <span class="emphasis"><em>30.10.32 [fs.class.directory_iterator]</em></span>,
+     <span class="emphasis"><em>30.10.33 [fs.class.rec.dir.itr]</em></span>
+     Any directory-like file types supported by
+     <code class="code">opendir</code>/<code class="code">readdir</code>
+     (or <code class="code">_wopendir</code>/<code class="code">_wreaddir</code> on Windows).
+   </p><div class="section"><div class="titlepage"><div><div><h5 class="title"><a id="iso.2017.par2ts"></a>Parallelism 2 TS</h5></div></div></div><p>
         <span class="emphasis"><em>9.3 [parallel.simd.abi]</em></span>
         <code class="code">max_fixed_size<T></code> is 32, except when targetting
         AVX512BW and <code class="code">sizeof(T)</code> is 1.
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
index 70a3154a8c35..1275d5656988 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
@@ -3003,7 +3003,8 @@ since C++14 and the implementation is complete.
    </para>
 
    <para>
-      <emphasis>30.10.2.1 [fs.conform.9945]</emphasis>
+      <emphasis>30.10.2.1 [fs.conform.9945]</emphasis>,
+      <emphasis>30.10.2.2 [fs.conform.os]</emphasis>
       The behavior of the filesystem library implementation will depend on
       the target operating system. Some features will not be supported
       on some targets. Symbolic links and file permissions
@@ -3040,7 +3041,7 @@ since C++14 and the implementation is complete.
       If <code>!is_regular_file(p)</code>, an error is reported.
    </para>
 
-    <para>
+   <para>
       <emphasis>30.10.15.32 [fs.op.rename]</emphasis>
       On Windows, <code>filesystem::rename</code>
       is implemented by calling <code>MoveFileExW</code> and so
@@ -3049,8 +3050,24 @@ since C++14 and the implementation is complete.
       Specifically, it is not possible to rename a directory to replace another
       directory (POSIX requires that to work if the directory being
       replaced is empty).
-    </para>
+   </para>
 
+   <para>
+      <emphasis>30.10.29.2 [fs.enum.file_type]</emphasis>,
+      <emphasis>30.10.34.3 [fs.op.copy]</emphasis>,
+      <emphasis>30.10.34.35 [fs.op.status]</emphasis>
+      No additional file types are supported, and there are no
+      implementation-defined enumerators in
+      <code>std::filesystem::file_type</code>.
+   </para>
+
+   <para>
+     <emphasis>30.10.32 [fs.class.directory_iterator]</emphasis>,
+     <emphasis>30.10.33 [fs.class.rec.dir.itr]</emphasis>
+     Any directory-like file types supported by
+     <code>opendir</code>/<code>readdir</code>
+     (or <code>_wopendir</code>/<code>_wreaddir</code> on Windows).
+   </para>
 
    <section xml:id="iso.2017.par2ts" xreflabel="Implementation Specific Behavior of the Parallelism 2 TS"><info><title>Parallelism 2 TS</title></info>