#[macro_export]
#[stable]
macro_rules! vec {
- ($x:expr; $y:expr) => ({
- let xs: $crate::boxed::Box<[_]> = $crate::boxed::Box::new([$x; $y]);
- $crate::slice::SliceExt::into_vec(xs)
- });
- ($($x:expr),*) => ({
- let xs: $crate::boxed::Box<[_]> = $crate::boxed::Box::new([$($x),*]);
- $crate::slice::SliceExt::into_vec(xs)
- });
+ ($x:expr; $y:expr) => (
+ <[_] as $crate::slice::SliceExt>::into_vec(
+ $crate::boxed::Box::new([$x; $y]))
+ );
+ ($($x:expr),*) => (
+ <[_] as $crate::slice::SliceExt>::into_vec(
+ $crate::boxed::Box::new([$($x),*]))
+ );
($($x:expr,)*) => (vec![$($x),*])
}
let _: Box<[int]> = Box::new([1, 2, 3]);
let _: Box<Fn(int) -> _> = Box::new(|x| (x as u8));
+
+ let _: Vec<Box<Fn(int) -> _>> = vec![
+ Box::new(|x| (x as u8)),
+ box |x| (x as i16 as u8),
+ ];
}
--- /dev/null
+// Copyright 2015 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.
+
+fn one() -> i32 { 1 }
+
+// Make sure the vec![...] macro doesn't introduce hidden rvalue
+// scopes (such as blocks) around the element expressions.
+pub fn main() {
+ assert_eq!(vec![&one(), &one(), &2], vec![&1, &1, &(one()+one())]);
+ assert_eq!(vec![&one(); 2], vec![&1, &one()]);
+}