forked from mirrors/gecko-dev
1e92070ea4
Source-Repo: https://github.com/servo/servo Source-Revision: dcc4697dde3ba8af32e233b302a16bea76af378a --HG-- rename : servo/components/util/linked_list.rs => servo/components/layout/linked_list.rs
21 lines
732 B
Rust
21 lines
732 B
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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//! Utility functions for doubly-linked lists.
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use std::collections::LinkedList;
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use std::mem;
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/// Splits the head off a list in O(1) time, and returns the head.
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pub fn split_off_head<T>(list: &mut LinkedList<T>) -> LinkedList<T> {
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let tail = list.split_off(1);
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mem::replace(list, tail)
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}
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/// Prepends the items in the other list to this one, leaving the other list empty.
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#[inline]
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pub fn prepend_from<T>(this: &mut LinkedList<T>, other: &mut LinkedList<T>) {
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other.append(this);
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mem::swap(this, other);
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}
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