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! { dg-do compile }
!
! PR fortran/40873
!
! Failed to compile (segfault) with -fwhole-file.
! Cf. PR 40873 comment 24; test case taken from
! PR fortran/31867 comment 6.
!
pure integer function lensum (words, sep)
character (len=*), intent(in) :: words(:), sep
lensum = (size (words)-1) * len (sep) + sum (len_trim (words))
end function
module util_mod
implicit none
interface
pure integer function lensum (words, sep)
character (len=*), intent(in) :: words(:), sep
end function
end interface
contains
function join (words, sep) result(str)
! trim and concatenate a vector of character variables,
! inserting sep between them
character (len=*), intent(in) :: words(:), sep
character (len=lensum (words, sep)) :: str
integer :: i, nw
nw = size (words)
str = ""
if (nw < 1) then
return
else
str = words(1)
end if
do i=2,nw
str = trim (str) // sep // words(i)
end do
end function join
end module util_mod
!
program xjoin
use util_mod, only: join
implicit none
character (len=5) :: words(2) = (/"two ","three"/)
write (*,"(1x,'words = ',a)") "'"//join (words, "&")//"'"
end program xjoin
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