On Sat, Jul 09, 2016 at 05:19:49AM -0700, Itsuki Toyota wrote: > See the following results > > $ perl6 -e 'say -1 ** -0.1' > -1 > $ perl6 -e 'say reduce * ** *, -1, (-0.1)' > NaN
This is not a bug in "reduce" itself. Exponentiation has higher precedence than unary minus, so the first expression is being parsed and executed as -(1 ** -0.1) and not (-1) ** -0.1. >From my rakudo (ver 2016.06-50-g5a4963f): $ ./perl6 -e 'say -1 ** -0.1' -1 $ ./perl6 -e 'say (-1) ** -0.1' NaN So, the reduce subroutine is doing exactly the same thing as &infix:<**> here does with a negative base. At the moment I'm inclined to believe that a negative integer with negative exponent should return NaN, but someone with more mathematics sense than I would have to make that call. Pm
