Move to std::optional in API when available
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enhancement
- Dominant language
- C++
- Stars
- 64
- Forks
- 65
- PR merge metrics
- No merged PRs in 30d
Description
Right now, when we use optional, we take it from boost.
We want to move to std::optional when available (based on **BOOST_NO_CXX17_HDR_OPTIONAL**), unless the user explicitly choose not to by setting **BOOST_MPI_FORCE_BOOST_OPTIONAL** in `boost/mpi/config.hpp`
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