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Add support/tests for exposing functions with tuples #860

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merged 1 commit into from Sep 29, 2023

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andrjohns
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Submission Checklist

  • Run unit tests
  • Declare copyright holder and agree to license (see below)

Summary

Reported in #859, Rcpp doesn't support converting std::tuple<> types to/from R. This PR adds the specialisations necessary for Rcpp, as well as tests for exposing tuple functions.

Copyright and Licensing

Please list the copyright holder for the work you are submitting
(this will be you or your assignee, such as a university or company):
Andrew Johnson

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license the submitted work under the following licenses:

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Codecov Report

Merging #860 (6dd285f) into master (77a1443) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 6dd285f differs from pull request most recent head 973e5ba. Consider uploading reports for the commit 973e5ba to get more accurate results

@@            Coverage Diff             @@
##           master     #860      +/-   ##
==========================================
+ Coverage   86.62%   86.63%   +0.01%     
==========================================
  Files          12       12              
  Lines        4365     4369       +4     
==========================================
+ Hits         3781     3785       +4     
  Misses        584      584              
Files Coverage Δ
R/utils.R 70.44% <100.00%> (+0.22%) ⬆️

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/**
* The Rcpp::wrap class is used to convert a C++ type to an R object type.
* Rather than implement anything bespoke for tuples we simply return an R list.
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Awesome!

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Awesome!

Indeed!

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@rok-cesnovar rok-cesnovar left a comment

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🚀

@jgabry
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jgabry commented Sep 29, 2023

Thanks @andrjohns! everything passing so I'll go ahead and merge.

@jgabry jgabry merged commit a2af167 into master Sep 29, 2023
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@jgabry jgabry deleted the expose-tuple-support branch September 29, 2023 18:56
@jgabry jgabry linked an issue Sep 29, 2023 that may be closed by this pull request
@andrjohns
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Thanks both! I'll have a look into upstreaming this into Rcpp-proper

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[Stan 2.33] Expose functions with tuple return type or argument type
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