// This source file is part of the Swift.org open source project
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors

// RUN: not %target-swift-frontend %s -typecheck
: Any) {
class A : e)) -> {
enum S) -> S {
typealias B) {
func d>(self.g == a: T) {
protocol b = {
0.d() {
}
protocol b = c) -> T, A {
}
protocol P {
}
}
}
}
public subscript (h, b in a {
struct X.d {
}
extension A : b {
}
}
extension A {
case b = Swift.h: end: (Any, e = j> : Any] == {
}
}
let n1: String {
}
}
return {
return { x }
}
}
}
protocol c : Any, e {
func e> Boo
