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[Octave-bug-tracker] [bug #54491] Order of evaluation of power with unit
John W. Eaton
[Octave-bug-tracker] [bug #54491] Order of evaluation of power with unitary operators
Mon, 13 Aug 2018 14:54:20 -0400 (EDT)
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Update of bug #54491 (project octave):
Item Group: Matlab Compatibility => WTF, Matlab?!?
Status: Invalid => Confirmed
Open/Closed: Closed => Open
Release: 4.4.0 => dev
Follow-up Comment #4:
seems that these compound power are unary +/- operators are given some special
treatment. I have no idea why. It means that an expression like
2^+2^+3^+4 == (2^+(2^+3))^+4 == (2^+8)^+4 == 256^+4 == 4294967296
will produce a different result from
2^2^3^4 == ((2^2)^3)^4 == (4^3)^4 == 64^4 == 16777216
I don't see these compound operators explained in the list of operators in the
Matlab docs. WTF? I don't understand why this behavior would be desirable.
Octave doesn't have these as separate operators (and I suspect that Matlab
doesn't either). But when used this way in Octave, the evaluation is the same
as for the power operator without the unary operator (left to right).
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