/// <summary> /// 检查正则表达式是否可以被嵌套。 /// </summary> /// <param name="regex">要检查的正则表达式。</param> protected static void CheckRegex(Regex regex) { AnchorExp anchor = regex as AnchorExp; if (anchor != null) { if (anchor.BeginningOfLine) { throw CompilerCommonExceptions.NestedBeginningOfLine("regex"); } if (anchor.TrailingExpression == AnchorExp.EndOfLine) { throw CompilerCommonExceptions.NestedEndOfLine("regex"); } throw CompilerCommonExceptions.NestedTrailing("regex"); } if (regex is EndOfFileExp) { throw CompilerCommonExceptions.NestedEndOfFile("regex"); } }