Macro iter_comprehensions::vec
source · macro_rules! vec { ($e:expr; $i:ident in $range:expr) => { ... }; ($e:expr; $i:ident in $range:expr, $($rest:tt)*) => { ... }; ($($rest:tt)*) => { ... }; }
Expand description
Extension of vec!
with comprehensions.
This is a short form for map!(...).collect::<Vec<_>>()
.
For convenience the vec!
macro also supports the syntax of the
std::vec!
, i.e. vec![0, 1, 2]
and vec![x; 5]
.
Example
use iter_comprehensions::vec;
assert_eq!(vec!(4*i + j; i in 0..5, j in 0..5, i < j),
std::vec![1, 2, 3, 4, 6, 7, 8, 11, 12, 16]);