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Add comment documenting why we can't use a simpler solution #90166

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Oct 23, 2021
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Add comment documenting why we can't use a simpler solution #90166

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4 changes: 4 additions & 0 deletions library/std/src/sys/windows/os.rs
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Expand Up @@ -281,6 +281,10 @@ pub fn temp_dir() -> PathBuf {
#[cfg(not(target_vendor = "uwp"))]
fn home_dir_crt() -> Option<PathBuf> {
unsafe {
// The magic constant -4 can be used as the token passed to GetUserProfileDirectoryW below
// instead of us having to go through these multiple steps to get a token. However this is
// not implemented on Windows 7, only Windows 8 and up. When we drop support for Windows 7
// we can simplify this code. See #90144 for details.
use crate::sys::handle::Handle;

let me = c::GetCurrentProcess();
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