Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed
arrows point from an interface to procedures which implement that interface.
This could include the module procedures in a generic interface or the
implementation in a submodule of an interface in a parent module.
SUBROUTINE assert2(n1,n2,string)CHARACTER(LEN=*),INTENT(IN)::stringLOGICAL,INTENT(IN)::n1,n2if(.not.(n1.and.n2))then write(*,*)'nrerror: an assertion failed with this tag:',&stringSTOP'program terminated by assert2'end if END SUBROUTINE assert2