> 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.
I believe the reason you don't see any other $ variables is that they're
reserved for the debugger and REPL.
brent@Brents-MacBook-Pro ~/D/Code> swift
Welcome to Apple Swift version 2.1.1 (swiftlang-700.1.101.15
clang-700.1.81). Type :help for assistance.
1> "foo"
$R0: String = "foo"
2> print($R0)
foo
--
Brent Royal-Gordon
Architechies
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