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.
Source Code
program volatile_doctestuse befor64use befor64use penfcharacter(len=:),allocatable::code64call b64_encode(n=134.231_R16P,code=code64)print"(A)",code64endprogram volatile_doctest