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https://github.com/servo/servo
synced 2026-04-28 10:27:40 +02:00
42 lines
1.0 KiB
Rust
42 lines
1.0 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use style::atomic_refcell::{AtomicRef, AtomicRefCell};
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struct Foo {
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u: u32,
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}
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struct Bar {
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f: Foo,
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}
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#[test]
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fn map() {
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let a = AtomicRefCell::new(Bar { f: Foo { u: 42 } });
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let b = a.borrow();
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assert_eq!(b.f.u, 42);
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let c = AtomicRef::map(b, |x| &x.f);
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assert_eq!(c.u, 42);
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let d = AtomicRef::map(c, |x| &x.u);
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assert_eq!(*d, 42);
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}
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/* FIXME(bholley): Enable once we have AtomicRefMut::map(), which is blocked on
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* https://github.com/Kimundi/owning-ref-rs/pull/16
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#[test]
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fn map_mut() {
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let a = AtomicRefCell::new(Bar { f: Foo { u: 42 } });
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let mut b = a.borrow_mut();
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assert_eq!(b.f.u, 42);
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b.f.u = 43;
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let mut c = AtomicRefMut::map(b, |x| &x.f);
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assert_eq!(c.u, 43);
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c.u = 44;
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let mut d = AtomicRefMut::map(c, |x| &x.u);
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assert_eq!(*d, 44);
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*d. = 45;
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assert_eq!(*d, 45);
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}*/
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