Tracking Issue for windows_case_insensitive

[CDirkx]

This is a tracking issue for dealing with strings on Windows that are defined to be case-insensitive: environment variable keys, registry keys, file paths, resource handle names etc.
The feature gate for the issue is windows_case_insensitive.

Unresolved Questions

What is the API std should offer to deal with Windows specific case-insensitive comparisons?

Implementation history

• PR Add os::windows::ffi::OsStrExt::system_cmp and system_eq #86008 (add system_cmp and system_eq to os::windows::OsStrExt)

[ChrisDenton]

I've been thinking about this recently. Filesystem paths are particularly tricky because they handle case insensitivity differently from the rest. On NTFS, case folding is stored in a $UpCase file, so it can differ per drive. Also case sensitivity can be turned off per directory.

For the rest, perhaps as a start, adding a function to OsStrExt that uses the OS function to do case insensitive comparisons? Or at least a compare function that somehow allows specifying case behaviour?

[CDirkx]

Yeah that was my plan, add system_cmp and system_eq to os::windows::OsStrExt as a start (#86008). Not sure what we should say there about the file system paths though.

[inquisitivecrystal]

@rustbot label +A-ffi +O-windows +T-libs