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 Monthly Call - September 2026
Traits, Generics, and modern-day OO for Fortran
Alternative to Graft for generating code graphs in Fortran repositories?