short circuit Or combinator instead of running both parsers

1 files changed, 9 insertions, 8 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 1de814c..6f16148 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -296,14 +296,15 @@ where
     ) -> ParserResult<I, Self::Output, OM, EM> {
         Tracer::trace("or", it.clone());
 
-        match (
-            self.left.run::<OM, EM, Tracer>(it.clone()),
-            self.right.run::<OM, EM, Tracer>(it.clone()),
-        ) {
-            (Ok((rest, output)), _) => Ok((rest, output)),
-            (_, Ok((rest, output))) => Ok((rest, output)),
-            (_, Err(rest)) => Err(rest),
-        }
+        if let Ok((rest, output)) = self.left.run::<OM, EM, Tracer>(it.clone()) {
+            return Ok((rest, output));
+        };
+
+        if let Ok((rest, output)) = self.right.run::<OM, EM, Tracer>(it.clone()) {
+            return Ok((rest, output));
+        };
+
+        Err(EM::bind(|| it))
     }
 }