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-rw-r--r--chain/src/lib.rs8
1 files changed, 4 insertions, 4 deletions
diff --git a/chain/src/lib.rs b/chain/src/lib.rs
index 91c37f7..a3d420b 100644
--- a/chain/src/lib.rs
+++ b/chain/src/lib.rs
@@ -131,6 +131,7 @@ where
Ok(new) => new,
Err(error) => {
// Prevent further iterations.
+ self.stop = true;
return Some(Err(error.into()));
}
@@ -157,8 +158,7 @@ pub trait Chain: LabelExtGraph<Edge> {
/// Represents the language that is present after we parse the
/// empty string, that is the initial configuration of the
- /// language. This may or may not be different from what
- /// `Default::default` gives.
+ /// language.
fn unit(atom: Self::Atom) -> Result<Self, Self::Error>;
/// Return true if and only if the language contains the empty
@@ -171,7 +171,7 @@ pub trait Chain: LabelExtGraph<Edge> {
/// An iterator that iterates all layers that need to be merged.
type DerIter: Iterator<Item = TwoLayers>;
- /// Take the derivative by a terminal symbol at position `POS`.
+ /// Take the derivative by a terminal `t` at position `pos`.
fn derive(&mut self, t: usize, pos: usize) -> Result<Self::DerIter, Self::Error>;
/// Take the union of all derivatives.
@@ -187,7 +187,7 @@ pub trait Chain: LabelExtGraph<Edge> {
let edges = self.union(der_iter)?;
- let new_index = self.extend(edges.into_iter())?;
+ let new_index = self.extend(edges)?;
self.update_history(new_index);