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Hello! In Elixir 1.12, ^^^ began outputting a deprecation warning:
iex(1)> import Bitwise
Bitwise
iex(2)> 3 ^^^ 5
warning: ^^^ is deprecated. It is typically used as xor but it has the wrong precedence, use Bitwise.bxor/2 instead
iex:2:3
6It isn't clear to me whether this warning is meant to indicate that ^^^ is deprecated entirely, or just in its use as a delegate for Bitwise.bxor/2. The fact that it calls out Bitwise.bxor/2 specifically makes me think that the deprecation is limited to that use, but the warning is output in all cases:
iex(1)> defmodule Operator do
...(1)> import Kernel, except: [^^^: 2]
...(1)> def a ^^^ b, do: a + b
...(1)> end
warning: ^^^ is deprecated. It is typically used as xor but it has the wrong precedence, use Bitwise.bxor/2 instead
iex:3:7
{:module, Operator,
<<70, 79, 82, 49, 0, 0, 4, 248, 66, 69, 65, 77, 65, 116, 85, 56, 0, 0, 0, 140,
0, 0, 0, 15, 15, 69, 108, 105, 120, 105, 114, 46, 79, 112, 101, 114, 97, 116,
111, 114, 8, 95, 95, 105, 110, 102, 111, ...>>, {:^^^, 2}}
iex(2)> import Operator
Operator
iex(3)> 5 ^^^ 3
8
iex(4)> warning: ^^^ is deprecated. It is typically used as xor but it has the wrong precedence, use Bitwise.bxor/2 instead
iex:3:3
nil
iex(5)> Note, also, that in the last snippet the warning is output after the result of the expression is printed, causing it to be rendered as part of the prompt for iex(4)>
I suppose my question is: is ^^^ going to be removed entirely in Elixir 2.0.0, and if so, should the warning be updated to reflect that more clearly?