f.txt

% ed test.swift
test.swift: No such file or directory
a
import Foundation
public func with<T: AnyObject>(_ item: T, update: (inout T) throws -> Void) rethrows -> T {
    var this = item
    try update(&this)
    var ptr: Unmanaged<T>? = Unmanaged<T>.passRetained(this).autorelease(); defer { ptr = nil }
    return this
}

let p = Process()
let task3 = with(p) {
    $0.launchPath = "/usr/bin/mdfind"
    $0.arguments = ["kMDItemDisplayName == *.playground"]
    $0.standardOutput = pipe
}

let task4 = with(Process()) {
    $0.launchPath = "/usr/bin/mdfind"
    $0.arguments = ["kMDItemDisplayName == *.playground"]
    $0.standardOutput = pipe
}
print(task3)
print(task4)
.
w
618
q
% swiftc test.swift
% ./test
<NSConcreteTask: 0x7fca1240b200>
<NSConcreteTask: 0x7fca1240d4f0>
% swift test.swift
<NSConcreteTask: 0x7fbed9f26130>
<NSConcreteTask: 0x7fbed9f307c0>
%