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helix/helix-core/src/macros.rs

18 lines
523 B
Rust

#[macro_export]
macro_rules! hashmap {
(@single $($x:tt)*) => (());
(@count $($rest:expr),*) => (<[()]>::len(&[$(hashmap!(@single $rest)),*]));
($($key:expr => $value:expr,)+) => { hashmap!($($key => $value),+) };
($($key:expr => $value:expr),*) => {
{
let _cap = hashmap!(@count $($key),*);
let mut _map = ::std::collections::HashMap::with_capacity(_cap);
$(
let _ = _map.insert($key, $value);
)*
_map
}
};
}