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This commit is contained in:
Aleksey Kladov 2018-08-27 10:01:31 +03:00
parent 9b69c7df19
commit 8b0298ce09
7 changed files with 155 additions and 75 deletions
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crates/libsyntax2/src/algo/mod.rs
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@ -119,7 +119,7 @@ fn common_ancestor<'a>(n1: SyntaxNodeRef<'a>, n2: SyntaxNodeRef<'a>) -> SyntaxNo
panic!("Can't find common ancestor of {:?} and {:?}", n1, n2)
}
fn generate<T>(seed: Option<T>, step: impl Fn(&T) -> Option<T>) -> impl Iterator<Item=T> {
pub fn generate<T>(seed: Option<T>, step: impl Fn(&T) -> Option<T>) -> impl Iterator<Item=T> {
::itertools::unfold(seed, move |slot| {
slot.take().map(|curr| {
*slot = step(&curr);