Max Alekseyev on Sat, 29 Oct 2022 13:42:55 +0200

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Re: arithmetic operations with t_INFINITY

Christian, what I ask for has nothing to do with 1/0, which is undefined and should result in an error by any count.


On Sat, Oct 29, 2022, 2:53 AM Christian Krause <> wrote:
If you consider 1/0 as the limit of 1/x from the positive side of the x-axis, it would be +oo. If you consider it as the limit from the left side, it would be -oo. The choice for +oo seems arbitrary in this case.

On Fri 28. Oct 2022 at 22:14, Max Alekseyev <> wrote:
It seems reasonable to expect that "123 + oo" or "-567 * oo" should evaluate in "+oo" and "-oo", respectively, but at the moment they both result in the "forbidden" error.
Can support of basic arithmetic operations for t_INFINITY be added? Of course, undefined operations such as "oo - oo" should still produce an error.
Thank you!