<div dir="ltr">Is it considered infeasible for any characters to be allowed in both identifiers and operators?<div class="gmail_extra">
<br><div class="gmail_quote">On Sun, Jan 3, 2016 at 1:23 PM, Chris Lattner via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
> On Jan 2, 2016, at 11:53 PM, Brent Royal-Gordon via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br>
><br>
>> Swift currently does not allow operators to use $ - I assume because the grammar reserves it in one place: `implicit-parameter-name`. I don't see why an entire class of identifiers has been eliminated, so I propose $ instead be reclassified as an `operator-character` so it can be used mixed in with other such characters, but prevents the introduction of `$Identifier`-style declarations that might conflict with implicit parameters.<br>
><br>
> I believe the reason you don't see any other $ variables is that they're reserved for the debugger and REPL.<br>
><br>
> brent@Brents-MacBook-Pro ~/D/Code> swift<br>
> Welcome to Apple Swift version 2.1.1 (swiftlang-700.1.101.15 clang-700.1.81). Type :help for assistance.<br>
> 1> "foo"<br>
> $R0: String = "foo"<br>
> 2> print($R0)<br>
> foo<br>
<br>
</span>Right. That said, our current operator space (particularly the unicode segments covered) is not super well considered. It would be great for someone to take a more systematic pass over them to rationalize things.<br>
<br>
-Chris<br>
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