Use a better unreachable() macro
Use a better unreachable() macro

chemfiles/chemfiles,Luthaf/Chemharp,lscalfi/chemfiles,Luthaf/Chemharp,lscalfi/chemfiles,chemfiles/chemfiles,lscalfi/chemfiles,lscalfi/chemfiles,chemfiles/chemfiles,chemfiles/chemfiles,Luthaf/Chemharp