1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
!! Test to check if actual function is called instead of its m_type_declaration
module procedure_08_module
contains
subroutine cb(x)
implicit none
integer, intent(inout), optional :: x(:)
x = 1
end subroutine cb
subroutine calfun(x)
implicit none
integer, intent(inout), optional :: x(:)
logical :: y
x = 2
y = present(x)
print *, y
if (.not. y) error stop
end subroutine calfun
end module procedure_08_module
program procedure_08
use procedure_08_module
call temp(calfun)
call temp()
call temp2(calfun)
call temp2()
contains
subroutine temp(call_back)
implicit none
procedure(cb), optional :: call_back
integer :: x(4)
if(present(call_back)) then
call call_back(x)
print *, x
if(x(1) /= 2) error stop
end if
end subroutine temp
subroutine temp2(call_back)
implicit none
procedure(cb), optional :: call_back
integer, save :: x(4) = 0
if(present(call_back)) then
call temp3(call_back, x)
call temp3(call_back, x(1:3))
end if
end subroutine
!! Check: call_back is updated in `pass_array_by_data` pass
subroutine temp3(call_back, x)
implicit none
procedure(cb) :: call_back
integer, intent(inout) :: x(:)
call call_back(x)
print *, x
if(x(1) /= 2) error stop
end subroutine
end program procedure_08
|
