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syntax: allow stmt/expr macro invocations to be delimited by [].
this is useful for macros like vec! which construct containers
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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. | ||
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#![feature(macro_rules)] | ||
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macro_rules! vec [ | ||
($($e:expr),*) => ({ | ||
let mut _temp = ::std::vec::Vec::new(); | ||
$(_temp.push($e);)* | ||
_temp | ||
}) | ||
] | ||
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pub fn main() { | ||
let my_vec = vec![1, 2, 3, 4, 5]; | ||
} |
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r+