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! { dg-do compile }
! { dg-additional-options "-Wextra" }
!
! PR 85599: warn about short-circuiting of logical expressions for non-pure functions
!
! Contributed by Janus Weil <janus@gcc.gnu.org>
module a
interface impl_pure_a
module procedure impl_pure_a1
end interface
contains
logical function impl_pure_a1()
impl_pure_a1 = .true.
end function
end module
program short_circuit
use a
logical :: flag
flag = .false.
flag = check() .and. flag
flag = flag .and. check() ! { dg-warning "might not be evaluated" }
flag = flag .and. pure_check()
flag = flag .and. impl_pure_1()
flag = flag .and. impl_pure_2()
flag = flag .and. impl_pure_a1()
flag = flag .and. impl_pure_a()
contains
logical function check()
integer, save :: i = 1
print *, "check", i
i = i + 1
check = .true.
end function
logical pure function pure_check()
pure_check = .true.
end function
logical function impl_pure_1()
impl_pure_1 = .true.
end function
logical function impl_pure_2()
impl_pure_2 = impl_pure_1()
end function
end
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