return -2 : is there a clean way to exit parent function from a nested function?

8 次查看（过去 30 天）
Jonas
Jonas 2015-1-15
评论： Jonas 2015-1-15
I have a parent function and several nested functions. I would like to be able, in a nested function instead of doing "return" and go back to the parent function, to do some kind of "return-2" and also exit the parent function (not only the nested one).
Is there a clean way to do it?
(I know that I can use some "flag" variable, and then in the parent function have each time "if flag; return", but I want to avoid to have duplicated code, if possible.)

请先登录，再回答此问题。

采纳的回答

Image Analyst
Image Analyst 2015-1-15
As far as I know, the flag way you described is the clean way to do it. You dive in and then you bubble back up the reverse direction you went in. To do it any other way, for example a "goto" statement to send you directly to some arbitrary location, would enable "spaghetti code" and is not recommended. Don't worry about putting in 3 or 4 lines - your code might be way longer than that anyway. Anyway, some alternate method of accomplishing what you want would probably be that many lines also.
  2 个评论
John D'Errico
John D'Errico 2015-1-15
I could see the idea of a variable return, IF it were possible, as creating far too many bugs with the stack than it is worth. Just like the idea of a goto - a bad idea in terms of code flow, and not really that useful.
Jonas
Jonas 2015-1-15
Ok, thank you for all your answers and comments! I didn't realize that a return going up two levels may be bad.
So in my code I am doing the normal way, as Image Analyst suggested.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by