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rust: pin-init: internal: add missing where clause to projection types

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`#[pin_data]` failed to propagate the struct's `where` clause to the
generated projection struct. As a result, bounds written in a `where`
clause could be dropped during expansion, causing type errors when
fields depended on those bounds.

Fix this by adding the missing `where` clause to the generated
projection struct.

Reported-by: Andreas Hindborg <a.hindborg@kernel.org>
Closes: https://rust-for-linux.zulipchat.com/#narrow/channel/561532-pin-init/topic/generic.20bounds.20and.20.60.23.5Bpin_data.5D.60/with/578381591
Signed-off-by: Mohamad Alsadhan <mo@sdhn.cc>
Reviewed-by: Gary Guo <gary@garyguo.net>
[ Reworded commit message - Gary ]
Link: https://patch.msgid.link/20260428-pin-init-sync-v1-5-07f9bd3859fb@garyguo.net
Signed-off-by: Gary Guo <gary@garyguo.net>
This commit is contained in:
Mohamad Alsadhan
2026-04-28 14:10:54 +01:00
committed by Gary Guo
parent de54c2cb05
commit 5edf8ac281
1 changed files with 3 additions and 1 deletions
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4
rust/pin-init/internal/src/pin_data.rs
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@@ -304,7 +304,9 @@ fn generate_projections(
#[doc = #docs]
#[allow(dead_code)]
#[doc(hidden)]
#vis struct #projection #generics_with_pin_lt {
#vis struct #projection #generics_with_pin_lt
#whr
{
#(#fields_decl)*
___pin_phantom_data: ::core::marker::PhantomData<&'__pin mut ()>,
}