std_macro_extensions/b_tree_map/
macro.rs

1/// A macro to create a new `BTreeMap`, providing two usage options:
2///
3/// 1. `b_tree_map!()` - Creates an empty `BTreeMap`.
4/// 2. `b_tree_map!(key1 => value1, key2 => value2, ...)` - Creates a `BTreeMap` containing the specified key-value pairs.
5#[macro_export]
6macro_rules! b_tree_map {
7    () => {
8        std::collections::BTreeMap::new()
9    };
10    ($($key:expr => $val:expr),*) => {{
11        let mut map = std::collections::BTreeMap::new();
12        $( map.insert($key, $val); )*
13        map
14    }};
15}