In math and Perl, when one wants to group operators,

But you aren't "grouping operators". You're wrapping a single operator in grouping parens in order to isolate it from the next operator.

On the basis that using grouping parens to group a single operator is more confusing than using the character class escaping mechanism which has many benefits in this role, and is therefore a good thing to promote, I prefer the latter. But I wouldn't try and impose that on anyone else.

That you will disagree with me will come as no surprise to anyone.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^7: How we can separate a backref from a digit? by BrowserUk
in thread How we can separate a backref from a digit? by Serge314

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