[Rd] Is ALTREP "non-API"?

[hcorti@@71 m@iii@g oii gm@ii@com]

Hello, I don't believe it is illegal, as ALTREP "implements an abstraction
underneath the C API". And is "compatible with all code which uses the API".

Please see slide deck by Gabriel Becker,  with L Tierney, M Lawrence and T
Kalibera.

https://bioconductor.org/help/course-materials/2020/BiocDevelForum/16-ALTREP
.pdf

ALTREP framework implements an abstraction underneath traditional R C API
- Generalizes whats underneath the API
- Without changing how data are accessed
- Compatible with all C code which uses the API
- Compatible with R internals


I hope this helps,
Hernando


-----Original Message-----
From: R-devel <r-devel-bounces using r-project.org> On Behalf Of Hiroaki Yutani
Sent: Sunday, April 21, 2024 8:48 PM
To: r-devel <r-devel using r-project.org>
Subject: [Rd] Is ALTREP "non-API"?

Writing R Extension[1] defines "API" as:

    Entry points which are documented in this manual and declared in an
installed header file. These can be used in distributed packages and will
only be changed after deprecation.

But, the document (WRE) doesn't have even a single mention of ALTREP, the
term "ALTREP" itself or any entry points related to ALTREP. Does this mean,
despite the widespread use of it on R packages including CRAN ones, ALTREP
is not the API and accordingly using it in distributed packages is
considered illegal?

Best,
Yutani

[1]: https://cran.r-project.org/doc/manuals/r-release/R-exts.html#The-R-API

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