40 lines
959 B
Rust
40 lines
959 B
Rust
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// Copyright 2016 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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use std::mem::size_of;
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enum E {
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A = 1,
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B = 2,
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C = 3,
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}
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struct S {
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a: u16,
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b: u8,
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e: E,
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}
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fn main() {
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assert_eq!(size_of::<E>(), 1);
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assert_eq!(size_of::<Option<E>>(), 1);
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assert_eq!(size_of::<Result<E, ()>>(), 1);
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assert_eq!(size_of::<S>(), 4);
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assert_eq!(size_of::<Option<S>>(), 4);
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let enone = None::<E>;
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let esome = Some(E::A);
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if let Some(..) = enone {
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panic!();
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}
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if let None = esome {
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panic!();
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}
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}
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