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! { dg-do compile }

! { dg-options "-pedantic" }

! Check the fix for PR20893, in which actual arguments could violate:

! "(5) If it is an array, it shall not be supplied as an actual argument to

! an elemental procedure unless an array of the same rank is supplied as an

! actual argument corresponding to a nonoptional dummy argument of that

! elemental procedure." (12.4.1.5)

!

! Contributed by Joost VandeVondele 

!

  CALL T1(1,2)

CONTAINS

  SUBROUTINE T1(A1,A2,A3)

    INTEGER           :: A1,A2, A4(2), A5(2)

    INTEGER, OPTIONAL :: A3(2)

    interface

      elemental function efoo (B1,B2,B3) result(bar)

        INTEGER, intent(in)           :: B1, B2

        integer           :: bar

        INTEGER, OPTIONAL, intent(in) :: B3

      end function efoo

    end interface

! check an intrinsic function

    write(6,*) MAX(A1,A2,A3) ! { dg-warning "array and OPTIONAL" }

    write(6,*) MAX(A1,A3,A2)

    write(6,*) MAX(A1,A4,A3)

! check an internal elemental function

    write(6,*) foo(A1,A2,A3) ! { dg-warning "array and OPTIONAL" }

    write(6,*) foo(A1,A3,A2)

    write(6,*) foo(A1,A4,A3)

! check an external elemental function

    write(6,*) efoo(A1,A2,A3) ! { dg-warning "array and OPTIONAL" }

    write(6,*) efoo(A1,A3,A2)

    write(6,*) efoo(A1,A4,A3)

! check an elemental subroutine

    call foobar (A5,A2,A4)

    call foobar (A5,A4,A4)

  END SUBROUTINE

  elemental function foo (B1,B2,B3) result(bar)

    INTEGER, intent(in)           :: B1, B2

    integer           :: bar

    INTEGER, OPTIONAL, intent(in) :: B3

    bar = 1

  end function foo

  elemental subroutine foobar (B1,B2,B3)

    INTEGER, intent(OUT)           :: B1

    INTEGER, optional, intent(in)  :: B2, B3

    B1 = 1

  end subroutine foobar

END