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Support deriving AsBytes on generic repr(packed) structs #127

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joshlf opened this issue Nov 7, 2022 · 0 comments · Fixed by #128
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Support deriving AsBytes on generic repr(packed) structs #127

joshlf opened this issue Nov 7, 2022 · 0 comments · Fixed by #128
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blocking-next-release This issue should be resolved before we release on crates.io

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joshlf commented Nov 7, 2022 •
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We support deriving AsBytes on generic repr(transparent) structs because we don't need to explicitly check for padding, and so we don't need to emit code that's incompatible with generic type arguments. We ought to be able to use the same approach to support generic repr(packed) structs as well.

EDIT: Looks like we do support them, but there are no tests for that support, and our error messages imply that we don't support them. We should clean that up.

cc @djkoloski
@joshlf joshlf changed the title Support deriving AsBytes on generic repr(packed) structs Support deriving AsBytes on generic repr(packed) structs Nov 7, 2022
@joshlf joshlf self-assigned this Nov 7, 2022
@joshlf joshlf added the blocking-next-release This issue should be resolved before we release on crates.io label Nov 7, 2022
joshlf added a commit that referenced this issue Nov 7, 2022
@joshlf
[derive] Clean up AsBytes support on repr(packed)
8abf5fe 
Unify our handling of `repr(packed)` and `repr(transparent)` when
deriving `AsBytes`, and bring error messages up to date with the fact
that we support both of these reprs on generic structs.

Closes #127
@joshlf joshlf mentioned this issue Nov 7, 2022
Merged
joshlf added a commit that referenced this issue Nov 7, 2022
@joshlf
[derive] Clean up AsBytes support on repr(packed)
244b9fe 
Unify our handling of `repr(packed)` and `repr(transparent)` when
deriving `AsBytes`, and bring error messages up to date with the fact
that we support both of these reprs on generic structs.

Closes #127
joshlf added a commit that referenced this issue Nov 7, 2022
@joshlf
[derive] Clean up AsBytes support on repr(packed) (#128)
83b8297 
Unify our handling of `repr(packed)` and `repr(transparent)` when
deriving `AsBytes`, and bring error messages up to date with the fact
that we support both of these reprs on generic structs.

Closes #127
joshlf added a commit that referenced this issue Aug 3, 2023
@joshlf
[derive] Clean up AsBytes support on repr(packed) (#128)
cd7c788 
Unify our handling of `repr(packed)` and `repr(transparent)` when
deriving `AsBytes`, and bring error messages up to date with the fact
that we support both of these reprs on generic structs.

Closes #127
@joshlf joshlf mentioned this issue Aug 20, 2023
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[derive] Clean up AsBytes support on repr(packed) google/zerocopy
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