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module custom_operator_04_a
implicit none
public :: operator(.negation.)
integer :: negation = 3
interface operator(.negation.)
module procedure negative
end interface
contains
function negative(i) result(res)
integer, intent(in) :: i
integer :: res
res = -i
print *, negation
end function negative
end module custom_operator_04_a
program custom_operator_04
use custom_operator_04_a, only: operator(.negation.)
implicit none
integer :: res
res = .negation. 10
print *, res
end program custom_operator_04
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