> On Apr 8, 2016, at 10:46 AM, Антон Жилин via swift-evolution > <[email protected]> wrote: > > Right, `infix` operators without a precedence group logically should be able > to be used, just with parentheses everywhere. > > But users will most likely want to use such operators with `=` without > parentheses. It means, such operators should still belong to some precedence > groups. > > I suggest that for each such operator, an separate unnamed group should be > created. It will have no associativity and precedence greater than Ternary (I > actually agree this is the right choice). > > I also think it is OK that other operators will not be able to specify > precedence relation with such "unprecedented" operators
Right, I agree. I consider it to be the "safe default" for an operator to be non-associative and unordered with respect to all other operators. This would require using parentheses to disambiguate, which seems safer than a default precedence level. This proposal also eliminates the notion of a strictly ordered set of precedences. I do think it is useful to be able to specify precedence relationships without having to define a “group”, to avoid boilerplate when you have one operator at a logical level (“??” for example). -Chris _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
