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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![macro_escape]
/// Entry point of task panic, for details, see std::macros
#[macro_export]
macro_rules! panic(
() => (
panic!("{}", "explicit panic")
);
($msg:expr) => ({
static _MSG_FILE_LINE: (&'static str, &'static str, uint) = ($msg, file!(), line!());
::core::panicking::panic(&_MSG_FILE_LINE)
});
($fmt:expr, $($arg:tt)*) => ({
// a closure can't have return type !, so we need a full
// function to pass to format_args!, *and* we need the
// file and line numbers right here; so an inner bare fn
// is our only choice.
//
// LLVM doesn't tend to inline this, presumably because begin_unwind_fmt
// is #[cold] and #[inline(never)] and because this is flagged as cold
// as returning !. We really do want this to be inlined, however,
// because it's just a tiny wrapper. Small wins (156K to 149K in size)
// were seen when forcing this to be inlined, and that number just goes
// up with the number of calls to panic!()
//
// The leading _'s are to avoid dead code warnings if this is
// used inside a dead function. Just `#[allow(dead_code)]` is
// insufficient, since the user may have
// `#[forbid(dead_code)]` and which cannot be overridden.
#[inline(always)]
fn _run_fmt(fmt: &::std::fmt::Arguments) -> ! {
static _FILE_LINE: (&'static str, uint) = (file!(), line!());
::core::panicking::panic_fmt(fmt, &_FILE_LINE)
}
format_args!(_run_fmt, $fmt, $($arg)*)
});
)
/// Runtime assertion, for details see std::macros
#[macro_export]
macro_rules! assert(
($cond:expr) => (
if !$cond {
panic!(concat!("assertion failed: ", stringify!($cond)))
}
);
($cond:expr, $($arg:tt)*) => (
if !$cond {
panic!($($arg)*)
}
);
)
/// Runtime assertion, only without `--cfg ndebug`
#[macro_export]
macro_rules! debug_assert(
($(a:tt)*) => ({
if cfg!(not(ndebug)) {
assert!($($a)*);
}
})
)
/// Runtime assertion for equality, for details see std::macros
#[macro_export]
macro_rules! assert_eq(
($cond1:expr, $cond2:expr) => ({
let c1 = $cond1;
let c2 = $cond2;
if c1 != c2 || c2 != c1 {
panic!("expressions not equal, left: {}, right: {}", c1, c2);
}
})
)
/// Runtime assertion for equality, only without `--cfg ndebug`
#[macro_export]
macro_rules! debug_assert_eq(
($($a:tt)*) => ({
if cfg!(not(ndebug)) {
assert_eq!($($a)*);
}
})
)
/// Runtime assertion, disableable at compile time
#[macro_export]
macro_rules! debug_assert(
($($arg:tt)*) => (if cfg!(not(ndebug)) { assert!($($arg)*); })
)
/// Short circuiting evaluation on Err
#[macro_export]
macro_rules! try(
($e:expr) => (match $e { Ok(e) => e, Err(e) => return Err(e) })
)
/// Writing a formatted string into a writer
#[macro_export]
macro_rules! write(
($dst:expr, $($arg:tt)*) => ({
let dst = &mut *$dst;
format_args!(|args| { dst.write_fmt(args) }, $($arg)*)
})
)
/// Writing a formatted string plus a newline into a writer
#[macro_export]
macro_rules! writeln(
($dst:expr, $fmt:expr $($arg:tt)*) => (
write!($dst, concat!($fmt, "\n") $($arg)*)
)
)
#[macro_export]
macro_rules! unreachable( () => (panic!("unreachable code")) )
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