Tracking rustc bugs/features/RFCs that affect bindgen

[fitzgen]

This is a meta issue tracking rustc bugs and features that impact bindgen.

Appropriate things to list here would be either

• RFCs proposing some feature that bindgen can leverage to emit better bindings, or
• issues detailing rustc bugs we need fixed as a prerequisite to fixing bugs in our emitted bindings, or
• pull requests adding new features that enable us to emit new kinds of bindings we haven't been able to before.

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• Extern types: Tracking issue for RFC 1861: Extern types rust#43467

• u128 / i128 Tracking issue for 128-bit integer support (RFC 1504) rust#35118

• #[repr(align="N")] implement #[repr(align)] (tracking issue for RFC 1358) rust#33626

  • Wrong alignment of struct #1034

• #[repr(packed="N")] #[repr(packed(N))] (tracking issue for RFC 1399) rust#33158

  • Bindgen can't translate #pragma pack(n) into #[repr(packed = "n")] #537

• Support for thiscall calling convention Tracking issue for the thiscall calling convention rust#42202

• Support for the System V AMD64 C++ ABI Tracking issue for "sysv64" calling convention rust#36167

• Support for placement new Tracking issue for placement new rust#27779

• #[repr(transparent)] Tracking issue for RFC 1758: Specify repr(transparent) rust#43036

• const generics Tracking issue for const generics (RFC 2000) rust#44580

  • Emitting or deriving trait implementations #886 Drop logic of the "manual" implementation of traits for arrays which size is more than 32.
  • Handle non-type template parameters (const dependent type parameters) #362 Handle non-type template parameters

• const_fn const fn tracking issue (RFC 911) rust#24111

[CensoredUsername]

FYI: the system V AMD64 ABI will be stabilized in rustc 1.24

[fitzgen]

FYI: the system V AMD4 ABI will be stabilized in rustc 1.24

Thanks for the heads up!

[fitzgen]

As @upsuper pointed out, it looks like repr(align = "N") is being stabilized: rust-lang/rust#47006

I'm not sure what version it will hit stable in.

[pravic]

I'm not sure what version it will hit stable in.

From the PR:

(accepted, repr_align, "1.24.0", Some(33626)),

[Dr-Emann]

As of Rust 1.28, #[repr(transparent) is stable.

[LegNeato]

As of Rust 1.33, #[repr(packed(N))] is stable.