Okay, but I'm afraid this will only mean something to Rust users. The
reason being that we encountered this issue in extendr: a Rust extension
library for R. The specific compiler errors we encounter happen because
bindgen (the Rust code generation library) read the changed R header files,
and generated a new type definition for Rcomplex. Then, our downstream code
that uses that bindgen-generated code caused rustc compiler errors such as:
error[E0560]: union `libR_sys::Rcomplex` has no field named `r`
--> extendr-api\src\robj\into_robj.rs:93:20
|
93 | Rcomplex { r: 0., i: 0. }
| ^ `libR_sys::Rcomplex` does not have this field
|
= note: available fields are: `__bindgen_anon_1`, `private_data_c`
and
error[E0609]: no field `i` on type `libR_sys::Rcomplex`
--> extendr-api\src\scalar\rcplx_default.rs:105:35
|
105 | Rcplx(c64::new(val.r, val.i))
| ^ unknown field
|
= note: available fields are: `__bindgen_anon_1`, `private_data_c`
help: one of the expressions' fields has a field of the same name
|
105 | Rcplx(c64::new(val.r, val.__bindgen_anon_1.i))
| +++++++++++++++++
However, to put this into context, I would expect that C, C++ packages
would encounter a similar issue if they tried to access or modify specific
Rcomplex fields in the same way.
On Mon, Apr 3, 2023 at 11:39 PM Tomas Kalibera <tomas.kalib...@gmail.com>
wrote:
>
> On 4/3/23 14:07, Michael Milton wrote:
> > Hi all,
> >
> > There seems to have been a breaking change in the R trunk caused by a fix
> > to bug 18430 <https://bugs.r-project.org/show_bug.cgi?id=18430> that
> > relates to the layout of the Rcomplex typedef. Previously it was a
> struct,
> > but now it's a union by default
> > <
> https://github.com/r-devel/r-svn/commit/862f9f816ff3ff3cb3f851603f19e99f60a98475#diff-e9b09a44d9dc69444eca2300325e790a0cc6d2c8c3960f47519c7f8ef896f9e4
> >,
> > which breaks downstream code that relied on this layout. I'm aware of
> > the R_LEGACY_RCOMPLEX variable, but I still wouldn't expect an unreported
> > breaking change especially if it's aimed at R 4.3 (although I'm not sure
> if
> > it is). I believe src/include/R_ext/Complex.h, which this patch affects,
> is
> > considered part of the public R ABI since it's included by R.h.
> >
> > What should I, as a downstream package developer, do about this change?
>
> Please report the actual problem you have ran into.
>
> Thanks
> Tomas
>
> >
> > Cheers.
> >
> > [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-devel@r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
>
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