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