resolve67.f90
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! RUN: %S/test_errors.sh %s %t %f18
! Test restrictions on what subprograms can be used for defined operators.
! See: 15.4.3.4.2
module m1
interface operator(+)
!ERROR: OPERATOR(+) procedure 'add1' must be a function
subroutine add1(x, y, z)
real, intent(out) :: x
real, intent(in) :: y, z
end
end interface
end
module m2
interface operator(-)
real function sub1(x)
logical, intent(in) :: x
end
real function sub2(x, y)
logical, intent(in) :: x, y
end
!ERROR: OPERATOR(-) function 'sub3' must have one or two dummy arguments
real function sub3(x, y, z)
real, intent(in) :: x, y, z
end
end interface
interface operator(.not.)
!ERROR: OPERATOR(.NOT.) function 'not1' must have one dummy argument
real function not1(x, y)
real, intent(in) :: x, y
end
end interface
end
module m3
interface operator(/)
!ERROR: OPERATOR(/) function 'divide' may not have assumed-length CHARACTER(*) result
character(*) function divide(x, y)
character(*), intent(in) :: x, y
end
end interface
interface operator(<)
!ERROR: In OPERATOR(<) function 'lt1', dummy argument 'x' must have INTENT(IN) or VALUE attribute
!ERROR: In OPERATOR(<) function 'lt1', dummy argument 'y' may not be OPTIONAL
logical function lt1(x, y)
logical :: x
real, value, optional :: y
end
!ERROR: In OPERATOR(<) function 'lt2', dummy argument 'y' must be a data object
logical function lt2(x, y)
logical, intent(in) :: x
intent(in) :: y
interface
subroutine y()
end
end interface
end
end interface
end
module m4
interface operator(+)
!ERROR: OPERATOR(+) function 'add' conflicts with intrinsic operator
complex function add(x, y)
real, intent(in) :: x
integer, value :: y
end
!ERROR: OPERATOR(+) function 'plus' conflicts with intrinsic operator
real function plus(x)
complex, intent(in) :: x
end
end interface
interface operator(.not.)
real function not1(x)
real, value :: x
end
!ERROR: OPERATOR(.NOT.) function 'not2' conflicts with intrinsic operator
logical(8) function not2(x)
logical(8), value :: x
end
end interface
interface operator(.and.)
!ERROR: OPERATOR(.AND.) function 'and' conflicts with intrinsic operator
real function and(x, y)
logical(1), value :: x
logical(8), value :: y
end
end interface
interface operator(//)
real function concat1(x, y)
real, value :: x, y
end
real function concat2(x, y)
character(kind=1, len=4), intent(in) :: x
character(kind=4, len=4), intent(in) :: y
end
!ERROR: OPERATOR(//) function 'concat3' conflicts with intrinsic operator
real function concat3(x, y)
character(kind=4, len=4), intent(in) :: x
character(kind=4, len=4), intent(in) :: y
end
end interface
end