Permit casting region pointers to unsafe ones.

src/test/compile-fail/cast-vector-to-unsafe-nonstatic.rs

@@ -0,0 +1,14 @@
+// Copyright 2012 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 foo = ['h' as u8, 'i' as u8, 0 as u8];
+    let bar = &foo as *u8; //~ ERROR mismatched types
+}

src/test/compile-fail/const-cast-different-types.rs

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+// Copyright 2012 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.
+
+const a: &static/str = &"foo";
+const b: *u8 = a as *u8; //~ ERROR non-scalar cast
+const c: *u8 = &a as *u8; //~ ERROR mismatched types
+
+fn main() {
+}

src/test/compile-fail/const-cast-wrong-type.rs

@@ -0,0 +1,15 @@
+// Copyright 2012 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.
+
+const a: [u8 * 3] = ['h' as u8, 'i' as u8, 0 as u8];
+const b: *i8 = &a as *i8; //~ ERROR mismatched types
+
+fn main() {
+}

src/test/run-pass/const-cast.rs

@@ -0,0 +1,21 @@
+// Copyright 2012 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.
+
+extern fn foo() {}
+
+const x: *u8 = foo;
+const y: *libc::c_void = x as *libc::c_void;
+const a: &static/int = &10;
+const b: *int = a as *int;
+
+fn main() {
+    assert x as *libc::c_void == y;
+    assert a as *int == b;
+}

src/test/run-pass/const-str-ptr.rs

@@ -0,0 +1,22 @@
+// Copyright 2012 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.
+
+const a: [u8 * 3] = ['h' as u8, 'i' as u8, 0 as u8];
+const c: &static/[u8 * 3] = &a;
+const b: *u8 = c as *u8;
+
+fn main() {
+    let foo = &a as *u8;
+    assert unsafe { str::raw::from_bytes(a) } == ~"hi\x00";
+    assert unsafe { str::raw::from_buf(foo) } == ~"hi";
+    assert unsafe { str::raw::from_buf(b) } == ~"hi";
+    assert unsafe { *b == a[0] };
+    assert unsafe { *(&c[0] as *u8) == a[0] };
+}