スマートではないですが、modeが値型だった場合の実現例を考えてみました。

  delegate void setCaseIgnorerDelegate(bool);

　void CreateComparators(out setCaseIgnorerDelegate setCaseIgnore,out Comparator [] comparators)
  {
      SearchMode localSearchMode = new SearchMode(.....
      mode = localSearchMode;
      setCaseIgnore = delegate(bool val) { mode.setCaseIgnore(val); }
      comparators = new Comparator[.....];
      comparators[0] = delegate (string x,string y) {........ if (mode.IsCaseIgnore) .... 
      comparators[1] = delegate (string x,string y) {........ if (mode.IsCaseIgnore) ....
  }

  void XXXX()
  {
      setCaseIgnorerDelegate setCaseIgnore;
      Comparator [] comparators;
      CreateComparators(out setCaseIgnore,out comparators);
 
      setCaseIgnore(true);
  }

町田　達彦


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