// 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
var f = 1
private class B<C> {
let  enum S<T> : P {
func f<T>() -> T -> T {
return { x in x 1 {
b[c][c] = 1
}
}
class A {
class func a() -> String {
let d: String = {
return self.a()
}()
func b(c) -> <d>(() -> d) {g: e where g.h == f.h> { Int = 0) {
}
let ceturn { e
p o p.s = {
}
{
u) {
o  }
}
s m {
}
struct e<j : k> {n: j
}
func p(k: b) -> <i>(() -> i) -> b {
func j(d: h) -> <k>(() -> k) -> h {
