What do lua/python/ruby return for "-8 - 1"?
On 7/06/2015 8:40 PM, Jochen Theodorou wrote:
Am 06.06.2015 13:08, schrieb Paul King:
[...]
def x = 5
assert -x ** 2 == -25 // treated as -(x ** 2)
assert --x ** 2 == 24 // treated as --(x ** 2)
This behavior is different to the other operators and different to what
the comments in the grammar describe as the intended behavior but the
order of two rules was presumably accidentally reversed in the grammar.
After the change, the following executes:
def x = 5
assert -x ** 2 == 25 // treated as (-x) ** 2
assert --x ** 2 == 16 // treated as (--x) ** 2
I just checked Ruby and Python and there -2**4 will return -16, same for -2^4
in Lua. So now I am wondering if that is the right thing for unary minus
bye blackdrag
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