[Octave-bug-tracker] [bug #31974] Interpreter fails to create complex numbers with Inf complex parts

[John W. Eaton]

Follow-up Comment #18, bug #31974 (project octave):

What does Matlab do for


function f (x, y)
  x * y
  x / y
end

f (Inf, i)


If it produces 0+Infi and 0-Infi, then this is not limited to constant
folding, so we have to implement the special case in the operators that might
be affected.  I would guess this includes *, .*, /, ./, , and . for mixed real
and complex cases for scalar by scalar and scalar by array operations for both
double and single values.  Or, we can use a class derived from std::complex
that implements the special cases we want.  Using a derived class like this
would probably require fewer changes to Octave since we already have Complex
and FloatComplex typedefs, but then it would mean that anywhere the class is
used, we get the special behavior, and I'm not sure that's really what we
want.

In any case, I think this change should wait until after 3.4 is released.

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