def resolve(self, makefile, variables, fd, setting):
        nfrom = self._arguments[0].resolvestr(makefile, variables, setting)
        nto = self._arguments[1].resolvestr(makefile, variables, setting)
        # TODO: provide better errors if this doesn't convert
        nfrom = int(nfrom)
        nto = int(nto)

        words = list(self._arguments[2].resolvesplit(makefile, variables, setting))

        if nfrom < 1:
            nfrom = 1
        if nto < 1:
            nto = 1

        util.joiniter(fd, words[nfrom - 1:nto])

 def resolve(self, makefile, variables, fd, setting):
     d = list(self._arguments[0].resolvesplit(makefile, variables, setting))
     d.sort()
     util.joiniter(fd, d)