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module submodule_28_mod
implicit none
interface
module subroutine compute(x, y)
integer, intent(in) :: x
integer, intent(out) :: y
end subroutine
end interface
end module
submodule(submodule_28_mod) submodule_28_child
implicit none
contains
module procedure compute
y = helper(x)
end procedure
function helper(x) result(y)
integer, intent(in) :: x
integer :: y
y = x * 3
end function
end submodule
submodule(submodule_28_mod:submodule_28_child) submodule_28_grandchild
implicit none
contains
subroutine compute_via_helper(x, y)
integer, intent(in) :: x
integer, intent(out) :: y
y = helper(x)
end subroutine
end submodule
program submodule_28
use submodule_28_mod, only: compute
implicit none
integer :: x, y
x = 5
call compute(x, y)
if (y /= 15) error stop
print *, "ok"
end program
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