auto merge of #10932 : alexcrichton/rust/feature-update, r=cmr

Author: bors

src/librustc/front/feature_gate.rs

@@ -77,6 +77,14 @@ impl Context {
         }
     }
 
+    fn gate_box(&self, span: Span) {
+        self.gate_feature("managed_boxes", span,
+                          "The managed box syntax is being replaced by the \
+                           `std::gc::Gc` and `std::rc::Rc` types. Equivalent \
+                           functionality to managed trait objects will be \
+                           implemented but is currently missing.");
+    }
+
     fn has_feature(&self, feature: &str) -> bool {
         self.features.iter().any(|n| n.as_slice() == feature)
     }
@@ -172,17 +180,24 @@ impl Visitor<()> for Context {
                                    experimental and likely to be removed");
 
             },
-            ast::ty_box(_) => {
-                self.gate_feature("managed_boxes", t.span,
-                                  "The managed box syntax is being replaced by the `std::gc::Gc` \
-                                  and `std::rc::Rc` types. Equivalent functionality to managed \
-                                  trait objects will be implemented but is currently missing.");
-            }
+            ast::ty_box(_) => { self.gate_box(t.span); }
             _ => {}
         }
 
         visit::walk_ty(self, t, ());
     }
+
+    fn visit_expr(&mut self, e: @ast::Expr, _: ()) {
+        match e.node {
+            ast::ExprUnary(_, ast::UnBox(..), _) |
+            ast::ExprVstore(_, ast::ExprVstoreBox) |
+            ast::ExprVstore(_, ast::ExprVstoreMutBox) => {
+                self.gate_box(e.span);
+            }
+            _ => {}
+        }
+        visit::walk_expr(self, e, ());
+    }
 }
 
 pub fn check_crate(sess: Session, crate: &ast::Crate) {

src/librustc/middle/lint.rs

@@ -770,9 +770,21 @@ fn check_heap_type(cx: &Context, span: Span, ty: ty::t) {
         let mut n_uniq = 0;
         ty::fold_ty(cx.tcx, ty, |t| {
             match ty::get(t).sty {
-              ty::ty_box(_) => n_box += 1,
-              ty::ty_uniq(_) => n_uniq += 1,
-              _ => ()
+                ty::ty_box(_) | ty::ty_estr(ty::vstore_box) |
+                ty::ty_evec(_, ty::vstore_box) |
+                ty::ty_trait(_, _, ty::BoxTraitStore, _, _) => {
+                    n_box += 1;
+                }
+                ty::ty_uniq(_) | ty::ty_estr(ty::vstore_uniq) |
+                ty::ty_evec(_, ty::vstore_uniq) |
+                ty::ty_trait(_, _, ty::UniqTraitStore, _, _) => {
+                    n_uniq += 1;
+                }
+                ty::ty_closure(ref c) if c.sigil == ast::OwnedSigil => {
+                    n_uniq += 1;
+                }
+
+                _ => ()
             };
             t
         });

src/test/compile-fail/auto-ref-slice-plus-ref.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 fn main() {
 
     // Testing that method lookup does not automatically borrow

src/test/compile-fail/borrowck-loan-rcvr-overloaded-op.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 struct Point {
     x: int,
     y: int,

src/test/compile-fail/borrowck-loan-rcvr.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 struct point { x: int, y: int }
 
 trait methods {

src/test/compile-fail/borrowck-mut-boxed-vec.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 fn main() {
     let v = @mut [ 1, 2, 3 ];
     for _x in v.iter() {

src/test/compile-fail/issue-3763.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 mod my_mod {
     pub struct MyStruct {
         priv priv_field: int

src/test/compile-fail/lint-heap-memory.rs

@@ -19,6 +19,20 @@ struct Foo {
 struct Bar { x: ~int } //~ ERROR type uses owned
 
 fn main() {
-    let _x : Bar = Bar {x : ~10};
+    let _x : Bar = Bar {x : ~10}; //~ ERROR type uses owned
+
+    @2; //~ ERROR type uses managed
+    @[1]; //~ ERROR type uses managed
+    //~^ ERROR type uses managed
+    fn f(_: @Clone) {} //~ ERROR type uses managed
+    @""; //~ ERROR type uses managed
+    //~^ ERROR type uses managed
+
+    ~2; //~ ERROR type uses owned
+    ~[1]; //~ ERROR type uses owned
+    //~^ ERROR type uses owned
+    fn g(_: ~Clone) {} //~ ERROR type uses owned
+    ~""; //~ ERROR type uses owned
     //~^ ERROR type uses owned
+    proc() {}; //~ ERROR type uses owned
 }

src/test/compile-fail/moves-based-on-type-exprs.rs

@@ -1,6 +1,8 @@
 // Tests that references to move-by-default values trigger moves when
 // they occur as part of various kinds of expressions.
 
+#[feature(managed_boxes)];
+
 struct Foo<A> { f: A }
 fn guard(_s: ~str) -> bool {fail!()}
 fn touch<A>(_a: &A) {}

src/test/compile-fail/non-exhaustive-match.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 enum t { a, b, }
 
 fn main() {

src/test/compile-fail/occurs-check.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 fn main() {
     let f; //~ ERROR cyclic type of infinite size
     f = @f;

src/test/compile-fail/static-region-bound.rs

@@ -1,3 +1,5 @@
+#[feature(managed_boxes)];
+
 fn f<T:'static>(_: T) {}
 
 fn main() {

src/test/compile-fail/unique-unique-kind.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[feature(managed_boxes)];
+
 fn f<T:Send>(_i: T) {
 }
 

src/test/debug-info/borrowed-struct.rs

@@ -45,6 +45,7 @@
 // debugger:print *unique_val_interior_ref_2
 // check:$10 = 26.5
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 struct SomeStruct {

src/test/debug-info/box.rs

@@ -24,6 +24,7 @@
 // debugger:print d->val
 // check:$4 = false
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 fn main() {

src/test/debug-info/boxed-struct.rs

@@ -27,6 +27,7 @@
 // debugger:print managed_dtor->val
 // check:$4 = {x = 33, y = 333, z = 3333, w = 33333}
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 struct StructWithSomePadding {

src/test/debug-info/destructured-local.rs

@@ -125,6 +125,7 @@
 // debugger:print *nn
 // check:$43 = 56
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 struct Struct {

src/test/debug-info/generic-method-on-generic-struct.rs

@@ -94,6 +94,8 @@
 // check:$21 = {-16, 16.5}
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct<T> {
     x: T
 }

src/test/debug-info/managed-enum.rs

@@ -25,7 +25,7 @@
 // check:$3 = {-9747455}
 
 #[allow(unused_variable)];
-#[feature(struct_variant)];
+#[feature(struct_variant, managed_boxes)];
 
 // The first element is to ensure proper alignment, irrespective of the machines word size. Since
 // the size of the discriminant value is machine dependent, this has be taken into account when

src/test/debug-info/method-on-enum.rs

@@ -94,6 +94,7 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
 #[feature(struct_variant)];
 
 enum Enum {

src/test/debug-info/method-on-generic-struct.rs

@@ -94,6 +94,8 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct<T> {
     x: T
 }

src/test/debug-info/method-on-struct.rs

@@ -94,6 +94,8 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct {
     x: int
 }

src/test/debug-info/method-on-trait.rs

@@ -94,6 +94,8 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct {
     x: int
 }

src/test/debug-info/method-on-tuple-struct.rs

@@ -94,6 +94,8 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct TupleStruct(int, f64);
 
 impl TupleStruct {

src/test/debug-info/self-in-default-method.rs

@@ -94,6 +94,8 @@
 // check:$21 = -16
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct {
     x: int
 }

src/test/debug-info/self-in-generic-default-method.rs

@@ -94,6 +94,8 @@
 // check:$21 = {-16, 16.5}
 // debugger:continue
 
+#[feature(managed_boxes)];
+
 struct Struct {
     x: int
 }

src/test/debug-info/var-captured-in-nested-closure.rs

@@ -49,6 +49,7 @@
 // check:$14 = 8
 // debugger:continue
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 struct Struct {

src/test/debug-info/var-captured-in-stack-closure.rs

@@ -28,6 +28,7 @@
 // debugger:print managed->val
 // check:$6 = 7
 
+#[feature(managed_boxes)];
 #[allow(unused_variable)];
 
 struct Struct {

src/test/pretty/block-disambig.rs

@@ -12,6 +12,8 @@
 // previously ambiguous (e.g. 'if true { } *val;' gets parsed as a
 // binop)
 
+#[feature(managed_boxes)];
+
 fn test1() { let val = @0; { } *val; }
 
 fn test2() -> int { let val = @0; { } *val }

src/test/run-fail/borrowck-wg-autoderef-and-autoborrowvec-combined-fail-issue-6272.rs

@@ -8,6 +8,8 @@
 //
 // for a detailed explanation of what is going on here.
 
+#[feature(managed_boxes)];
+
 fn main() {
     let a = @mut [3i];
     let b = @mut [a];

src/test/run-fail/borrowck-wg-fail-2.rs

@@ -3,6 +3,8 @@
 // Test that write guards trigger when there is a write to a field
 // of a frozen structure.
 
+#[feature(managed_boxes)];
+
 struct S {
     x: int
 }

src/test/run-fail/borrowck-wg-fail-3.rs

@@ -3,6 +3,8 @@
 // Test that write guards trigger when there is a write to a directly
 // frozen @mut box.
 
+#[feature(managed_boxes)];
+
 fn main() {
     let x = @mut 3;
     let _y: &mut int = x;

src/test/run-fail/borrowck-wg-one-mut-one-imm-slice-method.rs

@@ -3,6 +3,8 @@
 // Test that write guards trigger when there is a coercion to
 // a slice on the receiver of a method.
 
+#[feature(managed_boxes)];
+
 trait MyMutSlice {
     fn my_mut_slice(self) -> Self;
 }

src/test/run-fail/borrowck-wg-one-mut-one-imm-slices.rs

@@ -2,6 +2,8 @@
 
 // Test that write guards trigger when arguments are coerced to slices.
 
+#[feature(managed_boxes)];
+
 fn add(x:&mut [int], y:&[int])
 {
     x[0] = x[0] + y[0];

src/test/run-fail/borrowck-wg-one-mut-one-imm.rs

@@ -3,6 +3,8 @@
 // Test that write guards trigger when we are indexing into
 // an @mut vector.
 
+#[feature(managed_boxes)];
+
 fn add(x:&mut int, y:&int)
 {
     *x = *x + *y;

src/test/run-fail/borrowck-wg-two-array-indices.rs

@@ -3,6 +3,8 @@
 // Test that arguments trigger when there are *two mutable* borrows
 // of indices.
 
+#[feature(managed_boxes)];
+
 fn add(x:&mut int, y:&mut int)
 {
     *x = *x + *y;

src/test/run-fail/unwind-assert.rs

@@ -10,6 +10,8 @@
 
 // error-pattern:fail
 
+#[feature(managed_boxes)];
+
 fn main() {
     let _a = @0;
     assert!(false);

src/test/run-fail/unwind-box-res.rs

@@ -10,6 +10,8 @@
 
 // error-pattern:fail
 
+#[feature(managed_boxes)];
+
 use std::cast;
 
 fn failfn() {