return
	}

	p.append(prog, cond, true)
}

func (p *Parser) patch() {
	for _, patch := range p.toPatch {
		targetProg := p.labels[patch.label]
		if targetProg == nil {
			p.errorf("undefined label %s", patch.label)
			return
		}
		p.branch(patch.addr, targetProg)
	}
	p.toPatch = p.toPatch[:0]
}

func (p *Parser) branch(addr *obj.Addr, target *obj.Prog) {
	*addr = obj.Addr{

  }

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {
    doTestOneCharMatch(matcher, "" + match);
    doTestOneCharNoMatch(matcher, "" + noMatch);
    doTestMatchThenNoMatch(matcher, "" + match + noMatch);
    doTestNoMatchThenMatch(matcher, "" + noMatch + match);
  }

  private void doTestOneCharMatch(CharMatcher matcher, String s) {

  }

  private void doTestGeneral(CharMatcher matcher, char match, char noMatch) {
    doTestOneCharMatch(matcher, "" + match);
    doTestOneCharNoMatch(matcher, "" + noMatch);
    doTestMatchThenNoMatch(matcher, "" + match + noMatch);
    doTestNoMatchThenMatch(matcher, "" + noMatch + match);
  }

  private void doTestOneCharMatch(CharMatcher matcher, String s) {

	input         []lex.Token
	inputPos      int
	pendingLabels []string // Labels to attach to next instruction.
	labels        map[string]*obj.Prog
	toPatch       []Patch
	addr          []obj.Addr
	arch          *arch.Arch
	ctxt          *obj.Link
	firstProg     *obj.Prog
	lastProg      *obj.Prog
	dataAddr      map[string]int64 // Most recent address for DATA for this symbol.