14 releases
0.5.4 | Jan 1, 2023 |
---|---|
0.5.3 | Jan 15, 2021 |
0.5.2 | Dec 20, 2020 |
0.4.4 | Dec 9, 2020 |
0.1.2 | Nov 25, 2020 |
#193 in Data structures
14,129 downloads per month
Used in 33 crates
(16 directly)
18KB
Velcro
A set of macros for conveniently initializing collections from Rust's std
and iterators. All of the macros support the unary ..
operator which "spreads"
the values of another collection or iterator.
velcro::vec!
is a drop-in replacement for std::vec!
. All functionality of
the std
macro is supported without overhead, but it also supports spreading values with the ..
operator.
Examples
use velcro::{hash_map, iter, vec};
assert_eq!(vec![0, 1, ..(2..7)], vec![0, 1, 2, 3, 4, 5, 6]);
let other = vec![3, 4, 5];
assert_eq!(vec![0, 1, 2, ..&other, 6], vec![0, 1, 2, 3, 4, 5, 6]);
let whitespace = iter![' ', '\t', '\r', '\n'];
let map = hash_map! {
..('0'..='9'): "digit",
..('a'..='z'): "lower",
..('A'..='Z'): "upper",
..whitespace: "whitespace",
'.': "punctuation",
',': "punctuation",
};
assert_eq!(map[&'x'], "lower");
assert_eq!(map[&'\r'], "whitespace");
assert_eq!(map[&'.'], "punctuation");
Help
For help, questions or to report an issue, please use the Github issue tracker.
Dependencies
~1.5MB
~37K SLoC