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module submodule_31_mod
implicit none
interface
module subroutine greet(x)
integer, intent(inout) :: x
end subroutine
module subroutine caller(x)
integer, intent(inout) :: x
end subroutine
end interface
end module
submodule(submodule_31_mod) submodule_31_impl
implicit none
contains
module procedure greet
x = x + 10
end procedure
end submodule
submodule(submodule_31_mod) submodule_31_middle
implicit none
interface
module subroutine do_call(x)
integer, intent(inout) :: x
end subroutine
end interface
contains
module procedure caller
call do_call(x)
end procedure
end submodule
submodule(submodule_31_mod:submodule_31_middle) submodule_31_leaf
implicit none
contains
module procedure do_call
call greet(x)
end procedure
end submodule
program submodule_31
use submodule_31_mod, only: caller
implicit none
integer :: x
x = 5
call caller(x)
if (x /= 15) error stop
print *, x
end program
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