language agnostic - Is there a standard for "???", "!!!", "TODO" etc. tags in comments? -


I'm talking about special words / token used at the beginning of the comment, to facilitate grepping or otherwise For comment to attach some special meaning, such as // TODO: Find out about this error that .

Some tags are clear, such as TODO and FIXME , but ??? and !!! What about ? What other people are I am asking because I have seen the last two very recently and some editors, i.e. xcode, provide a simple way to find all the comments which are such tags.

If any standard thus, I am fine with the details of your company-local policy. :)

Edit : Bonus points to reference the actual document.

These questions can also be useful in the SO:

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