99 lines
2.8 KiB
Rust
99 lines
2.8 KiB
Rust
// Copyright 2014 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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#![macro_escape]
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/// Entry point of task panic, for details, see std::macros
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#[macro_export]
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macro_rules! panic {
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() => (
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panic!("explicit panic")
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);
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($msg:expr) => ({
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static _MSG_FILE_LINE: (&'static str, &'static str, uint) = ($msg, file!(), line!());
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::core::panicking::panic(&_MSG_FILE_LINE)
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});
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($fmt:expr, $($arg:tt)*) => ({
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// The leading _'s are to avoid dead code warnings if this is
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// used inside a dead function. Just `#[allow(dead_code)]` is
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// insufficient, since the user may have
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// `#[forbid(dead_code)]` and which cannot be overridden.
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static _FILE_LINE: (&'static str, uint) = (file!(), line!());
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::core::panicking::panic_fmt(format_args!($fmt, $($arg)*), &_FILE_LINE)
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});
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}
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/// Runtime assertion, for details see std::macros
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#[macro_export]
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macro_rules! assert {
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($cond:expr) => (
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if !$cond {
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panic!(concat!("assertion failed: ", stringify!($cond)))
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}
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);
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($cond:expr, $($arg:tt)*) => (
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if !$cond {
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panic!($($arg)*)
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}
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);
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}
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/// Runtime assertion for equality, for details see std::macros
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#[macro_export]
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macro_rules! assert_eq {
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($cond1:expr, $cond2:expr) => ({
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let c1 = $cond1;
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let c2 = $cond2;
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if c1 != c2 || c2 != c1 {
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panic!("expressions not equal, left: {}, right: {}", c1, c2);
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}
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})
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}
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/// Runtime assertion for equality, only without `--cfg ndebug`
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#[macro_export]
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macro_rules! debug_assert_eq {
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($($a:tt)*) => ({
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if cfg!(not(ndebug)) {
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assert_eq!($($a)*);
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}
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})
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}
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/// Runtime assertion, disableable at compile time with `--cfg ndebug`
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#[macro_export]
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macro_rules! debug_assert {
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($($arg:tt)*) => (if cfg!(not(ndebug)) { assert!($($arg)*); })
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}
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/// Short circuiting evaluation on Err
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#[macro_export]
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macro_rules! try {
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($e:expr) => (match $e { Ok(e) => e, Err(e) => return Err(e) })
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}
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/// Writing a formatted string into a writer
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#[macro_export]
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macro_rules! write {
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($dst:expr, $($arg:tt)*) => ((&mut *$dst).write_fmt(format_args!($($arg)*)))
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}
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/// Writing a formatted string plus a newline into a writer
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#[macro_export]
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macro_rules! writeln {
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($dst:expr, $fmt:expr $($arg:tt)*) => (
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write!($dst, concat!($fmt, "\n") $($arg)*)
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)
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}
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#[macro_export]
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macro_rules! unreachable { () => (panic!("unreachable code")) }
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