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module operator_overloading_15_mod
type :: string_t
character(len=:), allocatable :: str
end type
interface operator(==)
module procedure string_array_equal
module procedure string_equal
end interface
contains
logical function string_array_equal(a, b)
type(string_t), intent(in) :: a(:), b(:)
integer :: i
string_array_equal = .true.
do i = 1, size(a)
if (a(i)%str /= b(i)%str) then
string_array_equal = .false.
return
end if
end do
end function
logical function string_equal(a, b)
type(string_t), intent(in) :: a, b
integer :: i
string_equal = (a%str == b%str)
end function
end module operator_overloading_15_mod
program operator_overloading_15
use operator_overloading_15_mod
type(string_t), allocatable, target :: a(:), b(:)
type(string_t), pointer :: a2(:), b2(:)
type(string_t), allocatable :: x, y
allocate(a(1), b(1))
allocate(x, y)
a(1)%str = "Hello"
b(1)%str = "HelloWorld"
x%str = "Hello"
y%str = "HelloWorld"
a2 => a
b2 => b
if (a == b) error stop
if (x == y) error stop
if (a2 == b2) error stop
end program
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