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Improve map! macro to allow extending the map with other map

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Tobie Morgan Hitchcock 2022-07-04 02:01:22 +01:00
parent 983a7b3f5c
commit 410295c800
1 changed files with 2 additions and 1 deletions
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3
src/mac/mod.rs
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@ -1,6 +1,7 @@
macro_rules! map {
($($k:expr => $v:expr),* $(,)?) => {{
($($k:expr => $v:expr),* $(,)? $( => $x:expr )?) => {{
let mut m = ::std::collections::BTreeMap::new();
$(m.extend($x.iter().map(|(k, v)| (k.clone(), v.clone())));)?
$(m.insert($k, $v);)+
m
}};