openethereum/util/macros/src/lib.rs
2020-09-22 14:53:52 +02:00

105 lines
2.2 KiB
Rust

// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.
// OpenEthereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// OpenEthereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
//! Utils common types and macros global reexport.
use std::io;
#[macro_export]
macro_rules! vec_into {
( $( $x:expr ),* ) => {
vec![ $( $x.into() ),* ]
}
}
#[macro_export]
macro_rules! slice_into {
( $( $x:expr ),* ) => {
&[ $( $x.into() ),* ]
}
}
#[macro_export]
macro_rules! hash_map {
() => { HashMap::new() };
( $( $x:expr => $y:expr ),* ) => {{
let mut x = HashMap::new();
$(
x.insert($x, $y);
)*
x
}}
}
#[macro_export]
macro_rules! hash_map_into {
() => { HashMap::new() };
( $( $x:expr => $y:expr ),* ) => {{
let mut x = HashMap::new();
$(
x.insert($x.into(), $y.into());
)*
x
}}
}
#[macro_export]
macro_rules! map {
() => { BTreeMap::new() };
( $( $x:expr => $y:expr ),* ) => {{
let mut x = BTreeMap::new();
$(
x.insert($x, $y);
)*
x
}}
}
#[macro_export]
macro_rules! map_into {
() => { BTreeMap::new() };
( $( $x:expr => $y:expr ),* ) => {{
let mut x = BTreeMap::new();
$(
x.insert($x.into(), $y.into());
)*
x
}}
}
#[macro_export]
macro_rules! flush {
($arg:expr) => ($crate::flush($arg.into()));
($($arg:tt)*) => ($crate::flush(format!("{}", format_args!($($arg)*))));
}
#[macro_export]
macro_rules! flushln {
($fmt:expr) => (flush!(concat!($fmt, "\n")));
($fmt:expr, $($arg:tt)*) => (flush!(concat!($fmt, "\n"), $($arg)*));
}
#[doc(hidden)]
pub fn flush(s: String) {
let _ = io::Write::write(&mut io::stdout(), s.as_bytes());
let _ = io::Write::flush(&mut io::stdout());
}
#[test]
fn test_flush() {
flushln!("hello_world {:?}", 1);
}