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 stringifor_string_t type(string) :: astring type(string) :: anotherstring logical :: test_passed(1) astring = 'Hello ' anotherstring = 'Bye bye' test_passed(1) = astring//anotherstring=='Hello Bye bye' print '(L1)', all(test_passed) endprogram volatile_doctest