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.
elemental function str_bol(n)result(str)!< Convert logical to string.!<!<```fortran!< use penf!< print "(A)", str(n=.true.)!<```!=> T <<<logical,intent(in)::n!< Logical to be converted.character(1)::str!< Returned string containing input number plus padding zeros.write(str,'(L1)')nendfunction str_bol