[Octave-bug-tracker] [bug #33304] power operator precedence and direction

[Rik]

Update of bug #33304 (project octave):

                  Status:                    None => Confirmed              

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Follow-up Comment #1:

This issue is confirmed on the development branch, even with the changes to
operator precedence made in changset 002948ae5bc0.

It would be useful if someone with access to Matlab could verify how it
handles the situation.  The operator precedence levels are defined here
(http://www.mathworks.com/help/techdoc/matlab_prog/f0-40063.html#f0-38155) and
they have exponent above unary minus and all operators at the same precedence
level acting left-to-right.

Sample code to verify operation:


2^-4^3 = ???


In octave, this is parsed as


2^(-4^3) == 2^(-64) = 5.4210e-20


I agree that I would expect the behavior to be parsed as


(2^-4)^3 == .0625^3 = 2.4414e-04




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