Nodes of different colours represent the following:
Solid arrows point from a file to a file which it depends on. A file is dependent upon another if the latter must be compiled before the former can be.
program volatile_doctest use befor64 use befor64 use penf character(len=:), allocatable :: code64 call b64_encode_up(up=[0._R4P,-32.12_R4P], code=code64) print "(A)", code64 endprogram volatile_doctest