Move unsized_tuple_coercion behind a feature gate.

src/test/compile-fail/dst-bad-assign-3.rs

@@ -10,6 +10,8 @@
 
 // Forbid assignment into a dynamically sized type.
 
+#![feature(unsized_tuple_coercion)]
+
 type Fat<T: ?Sized> = (isize, &'static str, T);
 //~^ WARNING trait bounds are not (yet) enforced
 

src/test/compile-fail/dst-bad-coerce1.rs

@@ -10,6 +10,8 @@
 
 // Attempt to change the type as well as unsizing.
 
+#![feature(unsized_tuple_coercion)]
+
 struct Fat<T: ?Sized> {
     ptr: T
 }

src/test/compile-fail/dst-bad-coerce3.rs

@@ -10,6 +10,8 @@
 
 // Attempt to extend the lifetime as well as unsizing.
 
+#![feature(unsized_tuple_coercion)]
+
 struct Fat<T: ?Sized> {
     ptr: T
 }

src/test/compile-fail/dst-bad-coerce4.rs

@@ -10,6 +10,8 @@
 
 // Attempt to coerce from unsized to sized.
 
+#![feature(unsized_tuple_coercion)]
+
 struct Fat<T: ?Sized> {
     ptr: T
 }

src/test/compile-fail/dst-bad-deep-2.rs

@@ -13,6 +13,8 @@
 // because it would require stack allocation of an unsized temporary (*g in the
 // test).
 
+#![feature(unsized_tuple_coercion)]
+
 pub fn main() {
     let f: ([isize; 3],) = ([5, 6, 7],);
     let g: &([isize],) = &f;

src/test/compile-fail/feature-gate-unsized_tuple_coercion.rs

@@ -0,0 +1,14 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    let _ : &(Send,) = &((),);
+    //~^ ERROR Unsized tuple coercion is not stable enough
+}

src/test/run-pass-valgrind/dst-dtor-3.rs

@@ -10,6 +10,8 @@
 
 // no-prefer-dynamic
 
+#![feature(unsized_tuple_coercion)]
+
 static mut DROP_RAN: bool = false;
 
 struct Foo;

src/test/run-pass-valgrind/dst-dtor-4.rs

@@ -10,6 +10,8 @@
 
 // no-prefer-dynamic
 
+#![feature(unsized_tuple_coercion)]
+
 static mut DROP_RAN: isize = 0;
 
 struct Foo;

src/test/run-pass/dst-irrefutable-bind.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![feature(unsized_tuple_coercion)]
+
 struct Test<T: ?Sized>(T);
 
 fn main() {

src/test/run-pass/dst-raw.rs

@@ -11,6 +11,8 @@
 // Test DST raw pointers
 
 
+#![feature(unsized_tuple_coercion)]
+
 trait Trait {
     fn foo(&self) -> isize;
 }

src/test/run-pass/dst-trait-tuple.rs

@@ -11,6 +11,7 @@
 
 #![allow(unused_features)]
 #![feature(box_syntax)]
+#![feature(unsized_tuple_coercion)]
 
 type Fat<T: ?Sized> = (isize, &'static str, T);
 

src/test/run-pass/dst-tuple-sole.rs

@@ -11,6 +11,8 @@
 // As dst-tuple.rs, but the unsized field is the only field in the tuple.
 
 
+#![feature(unsized_tuple_coercion)]
+
 type Fat<T: ?Sized> = (T,);
 
 // x is a fat pointer

src/test/run-pass/dst-tuple.rs

@@ -11,6 +11,7 @@
 
 #![allow(unknown_features)]
 #![feature(box_syntax)]
+#![feature(unsized_tuple_coercion)]
 
 type Fat<T: ?Sized> = (isize, &'static str, T);