Create Diary in a function?

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Florian Rössing 2022-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/1712810-create-diary-in-a-function

评论： Walter Roberson 2022-5-9

I am currently working on a simulation project where I want progress logs to be written to a file, so I can inspect them later. I was using diary for this. However having the setup of diary in the main function look ugly and made it bulky, so I wanted to move all the setup and diary functionality to a seperate function alike this:

function createLogFile(RunPath)

diaryfile = append(RunPath, 'log.txt');

if exist(diaryfile, 'file')

delete(diaryfile);

end

diary(diaryfile);

RAII.diary = onCleanup(@() diary('off'));

diary on

end

However as soon as the function finishes the diary falls out of scope and is closed.

Is there a way to pass the diary out of the function?

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采纳的回答

Walter Roberson 2022-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/1712810-create-diary-in-a-function#answer_958240

Return RAII from the function. Your onCleanup will not fire until the struct stops existing.

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Florian Rössing 2022-5-9

Thanks for that nice explanation. I believed taht RAII was some kind of system object that specifically has this attribute. The oddly specific and strange name led me to believe that.