From 9db415a7c94a65c2ce2892a76861138bd76a8e62 Mon Sep 17 00:00:00 2001
From: Janis <janis@nirgendwo.xyz>
Date: Fri, 8 Aug 2025 00:57:28 +0200
Subject: [PATCH] add AdvanceWhile trait for conditional iterator advancement

---
 src/iter.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/iter.rs b/src/iter.rs
index 25ecdca..c754f81 100644
--- a/src/iter.rs
+++ b/src/iter.rs
@@ -42,3 +42,20 @@ pub trait NextIf<I>: Iterator<Item = I> + Clone {
 }
 
 impl<I, T> NextIf<I> for T where T: Iterator<Item = I> + Clone {}
+
+pub trait AdvanceWhile<I>: Iterator<Item = I> + Clone {
+    /// Advance the iterator while `pred` returns true.
+    fn advance_while<F>(&mut self, mut pred: F)
+    where
+        F: FnMut(&Self::Item) -> bool,
+    {
+        loop {
+            match self.next_if(&mut pred) {
+                Some(_) => {}
+                None => break,
+            }
+        }
+    }
+}
+
+impl<I, T> AdvanceWhile<I> for T where T: Iterator<Item = I> + Clone {}