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.
Source Code
elemental function d_isnan(a)result(bool)real(8),intent(in)::alogical::boolbool=(a/=a).OR.(a-1==a)end function d_isnan