How does one invoke the Swift REPL for iOS? I tried the command line argument of swift -sdk ... and have looked, via swift -h, at the other invocation
swift -sdk ...
swift -h
One way to do this is to create an iOS/OS X project and set a break point to interrupt the flow. Then, enter repl into the lldb console and enjoy.
repl
For more on this one, watch WWDC 2014 session 409 - Introduction to LLDB and the Swift REPL.