| // RUN: %target-typecheck-verify-swift -swift-version 4 |
| |
| // FIXME: make these errors |
| |
| func test0(fn: (() -> ()) -> ()) { |
| fn { fn {} } // expected-error {{passing a closure which captures a non-escaping function parameter 'fn' to a call to a non-escaping function parameter can allow re-entrant modification of a variable}} |
| } |
| |
| func test1(fn: (() -> ()) -> ()) { // expected-note {{parameter 'fn' is implicitly non-escaping}} |
| // TODO: infer that this function is noescape from its captures |
| func foo() { |
| fn { fn {} } // expected-error {{can allow re-entrant modification}} |
| // expected-error@-1 {{declaration closing over non-escaping parameter 'fn' may allow it to escape}} |
| } |
| } |
| |
| func test2(x: inout Int, fn: (() -> ()) -> ()) { |
| func foo(myfn: () -> ()) { |
| x += 1 |
| myfn() |
| } |
| |
| // Make sure we only complain about calls to noescape parameters. |
| foo { fn {} } |
| } |
| |
| func test3(fn: (() -> ()) -> ()) { |
| { myfn in myfn { fn {} } }(fn) // expected-error {{can allow re-entrant modification}} |
| } |
| |
| func test4(fn: (() -> ()) -> ()) { // expected-note {{parameter 'fn' is implicitly non-escaping}} |
| // TODO: infer that this function is noescape from its captures |
| func foo() { |
| fn {} |
| // expected-error@-1 {{declaration closing over non-escaping parameter 'fn' may allow it to escape}} |
| // FIXME: if the above is ever not an error, we should diagnose at the call below |
| } |
| |
| fn(foo) |
| } |
