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1 | // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
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11 | // pretty-expanded FIXME #23616 |
12 | ||
62682a34 | 13 | use std::mem; |
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14 | |
15 | /// Returns the size of a type | |
c34b1796 | 16 | pub fn size_of<T>() -> usize { |
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17 | TypeInfo::size_of(None::<T>) |
18 | } | |
19 | ||
20 | /// Returns the size of the type that `val` points to | |
c34b1796 | 21 | pub fn size_of_val<T>(val: &T) -> usize { |
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22 | val.size_of_val() |
23 | } | |
24 | ||
9cc50fc6 | 25 | pub trait TypeInfo: Sized { |
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26 | fn size_of(_lame_type_hint: Option<Self>) -> usize; |
27 | fn size_of_val(&self) -> usize; | |
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28 | } |
29 | ||
30 | impl<T> TypeInfo for T { | |
31 | /// The size of the type in bytes. | |
c34b1796 | 32 | fn size_of(_lame_type_hint: Option<T>) -> usize { |
62682a34 | 33 | mem::size_of::<T>() |
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34 | } |
35 | ||
36 | /// Returns the size of the type of `self` in bytes. | |
c34b1796 | 37 | fn size_of_val(&self) -> usize { |
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38 | TypeInfo::size_of(None::<T>) |
39 | } | |
40 | } | |
41 | ||
42 | pub fn main() {} |