// This source file is part of the Swift.org open source project
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors

// RUN: not %target-swift-frontend %s -parse
class j {
    func y((Any, j))(v: (Any, AnyObject)) {
        y(v)
    }
}
func w(j: () -> ()) {
}
class v {
    l _ = w() {
    }
}
({})
func v<x>() -> (x, x -> x) -> x {
    l y j s<q : l, y: l m y.n == q.n> {
}
o l {
    u n
}
y q<x> {
    s w(x, () -> ())
}
o n {
    func j()  p
}
class r {
    func s() -> p {
        t ""
    }
}
class w: r, n {
    k v: ))] = []
}
class n<x : n>
