25 lines
1.0 KiB
Rust
25 lines
1.0 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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pub const BOX_FIELD_DROP_GLUE: usize = 1;
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pub const BOX_FIELD_BODY: usize = 4;
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/// The first half of a fat pointer.
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/// - For a closure, this is the code address.
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/// - For an object or trait instance, this is the address of the box.
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/// - For a slice, this is the base address.
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pub const FAT_PTR_ADDR: usize = 0;
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/// The second half of a fat pointer.
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/// - For a closure, this is the address of the environment.
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/// - For an object or trait instance, this is the address of the vtable.
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/// - For a slice, this is the length.
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pub const FAT_PTR_EXTRA: usize = 1;
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