[libcxx-commits] [libcxx] [libc++] fix back slash as root dir breaks lexically_relative, lexically_proximate and hash_value on Windows (PR #99780)

[Louis Dionne via libcxx-commits]

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@@ -368,7 +368,8 @@ size_t hash_value(const path& __p) noexcept {
   size_t hash_value = 0;
   hash<string_view_t> hasher;
   while (PP) {
-    hash_value = __hash_combine(hash_value, hasher(*PP));
+    string_view_t Part = PP.inRootDir() ? PATHSTR("/") : *PP;
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ldionne wrote:

So IIUC you canonicalize `<DRIVE>:/` to just `/` for the purpose of `hash_value`?

https://github.com/llvm/llvm-project/pull/99780