I branched from the C to Fortran transpiler to create partial transpilers from C++ and C to Fortran using Codex and Claude.
The mapping of C++ language constructs, including std::mdspan, to modern Fortran is described in the readme and here.
source & further reading
fortran-lang.discourse.group — original article
Fortran returns to top 20 TIOBE index
What is new in LLVM 22? | Arm Community
Modern ML resume with Fortran – and it's from a 69K-subscriber YouTuber