Feature request: allow more update operators, e.g. a ⊗= 2 as shorthand for a = a ⊗ 2

[carlobaldassi]

Only a subset of available operators allow the shorthand OPERATOR= notation. I think the current situation is that only ASCII operators are covered.
e.g.

julia> a ×= b
ERROR: syntax: unexpected "="
 in eval(::Module, ::Any) at ./boot.jl:236

I think it would be reasonable if all operators which allow binary infix syntax would also allow the shorthand. (This came up when I defined a custom ⊗ operator.)

[TotalVerb]

I think comparison operators should not be included, for consistency. After all, a >= b does not mean a = a > b.

[Sisyphuss]

It is always simple to define some more update operator. But the true question is whether they are in-place?

[StefanKarpinski]

Not the place, @Sisyphuss.

[StefanKarpinski]

This seems like a reasonable proposal to me – shall I mark it as accepted, @JeffBezanson?

[JeffBezanson]

Yes.

[Sacha0]

Not release blocking. Best!

[chakravala]

This feature would make sense because there is no situation in Julia where an operator immediately followed by an equal sign makes sense, except as an updating operator.

For example, ∪= could never make sense as anything but an updating operator. Since that is the case, it makes total sense to have the language support this feature.