how_to_use_swift_in_terminal.md

How to use swift in your terminal

setup

First, install Xcode 6 beta.

And run it.

sudo xcode-select -switch /Applications/Xcode6-Beta.app/Contents/Developer

By xcrun swift, repl will start.

$ xcrun swift
Welcome to Swift!  Type :help for assistance.
  1> var x = 3
x: Int = 3

How to compile

Write swift code.

foo.swift

func x() -> Int {
	return 3
}

println("hello")

compile

$ xcrun swift foo.swift
$ ./foo
hello

It works! yey!

println("\(C_ARGC)")
var index : Int
for index in 0..C_ARGC {
  println("\(index): \(C_ARGV[index])")
}

> swift swift-test.swift
swift-test.swift:4:31: error: 'Int32' is not convertible to 'Int'
  println("\(index): \(C_ARGV[index])")
                              ^

😫