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.
pure function str_ucs4_default(input)result(output)!< Convert string of default kind to UCS4 string.!<!<```fortran!< use penf!< character(len=:, kind=UCS4), allocatable :: string!< string = str_ascii('I was DEFAULT kind, but now I am UCS4')!< print "(A)", string!<```!=> I was DEFAULT kind, but now I am UCS4 <<<character(len=*),intent(in)::input!< Input string of default kind.character(len=:,kind=UCS4),allocatable::output!< Output string of UCS4 kind.output=inputendfunction str_ucs4_default