| 1 | // Copyright 2014-2017 The html5ever Project Developers. See the |
|---|---|
| 2 | // COPYRIGHT file at the top-level directory of this distribution. |
| 3 | // |
| 4 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| 5 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| 6 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| 7 | // option. This file may not be copied, modified, or distributed |
| 8 | // except according to those terms. |
| 9 | |
| 10 | macro_rules! unwrap_or_else { |
| 11 | ($opt:expr, $else_block:block) => {{ |
| 12 | let Some(x) = $opt else { $else_block }; |
| 13 | x |
| 14 | }}; |
| 15 | } |
| 16 | |
| 17 | macro_rules! unwrap_or_return { |
| 18 | ($opt:expr) => { |
| 19 | unwrap_or_else!($opt, { |
| 20 | return; |
| 21 | }) |
| 22 | }; |
| 23 | ($opt:expr, $retval:expr) => { |
| 24 | unwrap_or_else!($opt, { return $retval }) |
| 25 | }; |
| 26 | } |
| 27 | |
| 28 | macro_rules! time { |
| 29 | ($e:expr) => {{ |
| 30 | let now = ::std::time::Instant::now(); |
| 31 | let result = $e; |
| 32 | let d = now.elapsed(); |
| 33 | let dt = d.as_secs() * 1_000_000_000 + u64::from(d.subsec_nanos()); |
| 34 | (result, dt) |
| 35 | }}; |
| 36 | } |
| 37 |