| // 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. |
| |
| pub const BOX_FIELD_DROP_GLUE: usize = 1; |
| pub const BOX_FIELD_BODY: usize = 4; |
| |
| /// The first half of a fat pointer. |
| /// - For a closure, this is the code address. |
| /// - For an object or trait instance, this is the address of the box. |
| /// - For a slice, this is the base address. |
| pub const FAT_PTR_ADDR: usize = 0; |
| |
| /// The second half of a fat pointer. |
| /// - For a closure, this is the address of the environment. |
| /// - For an object or trait instance, this is the address of the vtable. |
| /// - For a slice, this is the length. |
| pub const FAT_PTR_EXTRA: usize = 1; |
