Add lint modes for uses of @ and ~ pointers, in general.

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

@@ -0,0 +1,11 @@
+#[forbid(heap_memory)];
+
+type foo = { //~ ERROR type uses managed
+    x: @int
+};
+
+fn main() {
+    let _x : { x : ~int } = {x : ~10};
+    //~^ ERROR type uses owned
+    //~^^ ERROR type uses owned
+}

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

@@ -0,0 +1,11 @@
+#[forbid(managed_heap_memory)];
+
+type foo = { //~ ERROR type uses managed
+    x: @int
+};
+
+fn main() {
+    let _x : foo = {x : @10};
+    //~^ ERROR type uses managed
+    //~^^ ERROR type uses managed
+}

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

@@ -0,0 +1,11 @@
+#[forbid(owned_heap_memory)];
+
+type foo = { //~ ERROR type uses owned
+    x: ~int
+};
+
+fn main() {
+    let _x : foo = {x : ~10};
+    //~^ ERROR type uses owned
+    //~^^ ERROR type uses owned
+}