[swift-evolution] [Review] SE-0077: Improved operator declarations

John McCall rjmccall at apple.com
Fri May 20 12:58:14 CDT 2016

> On May 17, 2016, at 8:30 PM, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
> Hello Swift community,
> The review of "SE-0077: Improved operator declarations" begins now and runs through May 23. The proposal is available here:
> 	https://github.com/apple/swift-evolution/blob/master/proposals/0077-operator-precedence.md <https://github.com/apple/swift-evolution/blob/master/proposals/0077-operator-precedence.md>

The transitivity rule plus the ability to define precedence relationships in both directions on a new precedence group allows a new precedence group to create a precedence relationship between existing unrelated precedence groups.  This should be forbidden.

What's the purpose of equality relationships between precedence groups?

Your proposal should call out the special treatment of the Assignment and Ternary groups.

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