clone iterator in OneOf

1 files changed, 16 insertions, 5 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 83ead73..1de814c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,11 @@
-use core::{cmp::PartialEq, fmt, iter::Iterator, marker::Sized, ops::Range};
+use core::{
+    clone::Clone,
+    cmp::PartialEq,
+    fmt,
+    iter::{IntoIterator, Iterator},
+    marker::Sized,
+    ops::Range,
+};
 
 use crate::{
     input::{Character, Input, InputIter},
@@ -427,7 +434,7 @@ impl<I, It> Parser<I> for OneOf<It>
 where
     I: Input,
     I::Item: PartialEq<It::Item>,
-    It: Iterator,
+    It: IntoIterator + Clone,
 {
     type Output = I::Item;
 
@@ -437,9 +444,13 @@ where
     ) -> ParserResult<I, Self::Output, OM, EM> {
         Tracer::trace("oneof", it.clone());
 
+        let start = it.clone();
+
         match it.next() {
-            Some((_, item)) if self.it.any(|i| item == i) => Ok((it, OM::bind(|| item))),
-            _ => Err(EM::bind(|| it)),
+            Some((_, item)) if self.it.clone().into_iter().any(|i| item == i) => {
+                Ok((it, OM::bind(|| item)))
+            }
+            _ => Err(EM::bind(|| start)),
         }
     }
 }
@@ -448,7 +459,7 @@ pub fn one_of<I, It>(it: It) -> impl Parser<I, Output = I::Item>
 where
     I: Input,
     I::Item: PartialEq<It::Item>,
-    It: Iterator,
+    It: IntoIterator + Clone,
 {
     OneOf { it }
 }