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program class_48
implicit none
type :: SeriesInt
integer :: scalar_data
integer, allocatable :: array_data(:)
end type
type :: SeriesIntNested
type(SeriesInt), allocatable :: v
end type
interface Series
procedure Series_scalar, Series_array
end interface
interface SeriesNested
procedure Series_nested_scalar_int
end interface
class(SeriesInt), allocatable :: s1, s2
class(SeriesIntNested), allocatable :: s3
! Call Series with integer
s1 = Series(42)
print *, "s1%scalar_data:", s1%scalar_data
print *, "s1%array_data:", s1%array_data
if (s1%scalar_data /= 42) error stop
if (.not. all(s1%array_data == [0, 0, 0, 0])) error stop
print *
! Call Series with array
s2 = Series([1,2,3,4])
print *, "s2%scalar_data:", s2%scalar_data
print *, "s2%array_data:", s2%array_data
if (s2%scalar_data /= 101) error stop
if (.not. all(s2%array_data == [1, 2, 3, 4])) error stop
print *
allocate(s3)
! Call SeriesNested with integer and assign to a struct instance member
s3%v = SeriesNested(42)
print *, "s3%v%scalar_data:", s3%v%scalar_data
if (s3%v%scalar_data /= 42) error stop
contains
function Series_scalar(data) result(self)
type(SeriesInt) :: self
integer, intent(in) :: data
self%scalar_data = data
allocate(self%array_data(4)) ! initialize to zeroes
end function
function Series_nested_scalar_int(data) result(self)
type(SeriesInt) :: self
integer, intent(in) :: data
self%scalar_data = data
end function
function Series_array(data) result(self)
type(SeriesInt) :: self
integer, intent(in) :: data(:)
self%array_data = data
self%scalar_data = 101
end function
end program class_48
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