end_with Function

   elemental function end_with(self, suffix, start, end, ignore_null_eof)
   !< Return true if a string ends with a specified suffix.
   !<
   !<```fortran
   !< type(string) :: astring
   !< logical      :: test_passed(5)
   !< astring = 'Hello WorLD!'
   !< test_passed(1) = astring%end_with(suffix='LD!').eqv..true.
   !< test_passed(2) = astring%end_with(suffix='lD!').eqv..false.
   !< test_passed(3) = astring%end_with(suffix='orLD!', start=5).eqv..true.
   !< test_passed(4) = astring%end_with(suffix='orLD!', start=8, end=12).eqv..true.
   !< test_passed(5) = astring%end_with(suffix='!').eqv..true.
   !< print '(L1)', all(test_passed)
   !<```
   !=> T <<<
   class(string),             intent(in)           :: self             !< The string.
   character(kind=CK, len=*), intent(in)           :: suffix           !< Searched suffix.
   integer,                   intent(in), optional :: start            !< Start position into the string.
   integer,                   intent(in), optional :: end              !< End position into the string.
   logical,                   intent(in), optional :: ignore_null_eof  !< Ignore null character at the end of file.
   logical                                         :: end_with         !< Result of the test.
   integer                                         :: start_           !< Start position into the string, local variable.
   integer                                         :: end_             !< End position into the string, local variable.
   logical                                         :: ignore_null_eof_ !< Ignore null character at the end of file, local variable.

   end_with = .false.
   if (allocated(self%raw)) then
      start_           = 1             ; if (present(start))           start_           = start
      end_             = len(self%raw) ; if (present(end))             end_             = end
      ignore_null_eof_ = .false.       ; if (present(ignore_null_eof)) ignore_null_eof_ = ignore_null_eof
      if (ignore_null_eof_.and.(self%raw(end_:end_) == char(0))) end_ = end_ - 1
      if (len(suffix) <= len(self%raw(start_:end_))) then
         end_with = self%raw(end_-len(suffix)+1:end_) == suffix
      endif
   endif
   endfunction end_with