It has nothing to do with Windows. fish doesn't support Windows. Their use of wchar_t is the glibc wchar_t (wchar_t is not Microsoft-specific) which is a 32-bit

It has nothing to do with Windows. fish doesn't support Windows. Their use of wchar_t is the glibc wchar_t (wchar_t is not Microsoft-specific) which is a 32-bit type and stores UTF-32-encoded codepoints. The Rust type they're using is also the same ( https://github.com/fish-shell/fish-shell/blob/master/doc_internal/rust-devel.md#strings https://github.com/fish-shell/fish-shell/blob/master/doc_int... ).