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simplify three false conditions for r_vector string

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
42/100
Issue type
Refactor
Clarity
Mostly clear
Activity status
Stale
Tech stack
cpp, r
Domain
backend

Research direction

Start in inst/include/cpp11/r_vector.hpp around line 1395 and inspect the three conditions discussed in the issue. Compare them with the proposed constructibility and std::string checks, then run the existing test suite to verify equivalent behavior. Done means the condition is simpler without changing its type-selection behavior.

Written by the indexing model from the issue text.

Description

Is there a better condition we could use, e.g. assert something true rather than three things false? https://github.com/r-lib/cpp11/blob/main/inst/include/cpp11/r_vector.hpp#L1395

Still using 3 conditions, I think it is simpler to ensure that C is not constructible from SEXP, and neither C nor T is a std::string.

Dominant language
C++
Stars
224
Forks
52
PR merge metrics
No merged PRs in 30d

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