Is there a prefix that performs from: and to: simultaneously?

[David Bremner]

Attic Hermit <fjdksl at cock.li> writes:

>> +john +friend -- tag:new AND (to:john at example.tld OR
>> from:john at example.tld)
>
> First did I tried that form, but I felt that wasn't up to snuff because
> I still have to write the same address two times.

Currently I think that's the best you can do. You may be interested in
defining a predefined query

notmuch config query.fromtojohn "to:john at example.tld OR from:john at example.tld"

then you can use

+john +friend -- tag:new AND (to:john at example.tld OR from:john at example.tld) query:fromtojohn

Hypothetically it would be possible to extend the query: syntax to
support parameters, but I'm not sure it's worth the extra complexity.