From 6243b684f817644a16c0f40c460304f1e2f9eb06 Mon Sep 17 00:00:00 2001
From: Valentin Huber <git@valentinhuber.me>
Date: Sat, 1 Feb 2025 21:24:24 +0100
Subject: [PATCH] Introduce BoolMutator (#2926)

---
 libafl/src/mutators/mod.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/libafl/src/mutators/mod.rs b/libafl/src/mutators/mod.rs
index 93667b789d..5a9745f26a 100644
--- a/libafl/src/mutators/mod.rs
+++ b/libafl/src/mutators/mod.rs
@@ -407,3 +407,22 @@ impl Named for NopMutator {
         &Cow::Borrowed("NopMutator")
     }
 }
+
+/// [`Mutator`] that flips a boolean value.
+///
+/// Mostly useful in combination with [`mapping::MappingMutator`]s.
+#[derive(Debug)]
+pub struct BoolMutator;
+
+impl<S> Mutator<bool, S> for BoolMutator {
+    fn mutate(&mut self, _state: &mut S, input: &mut bool) -> Result<MutationResult, Error> {
+        *input = !*input;
+        Ok(MutationResult::Mutated)
+    }
+}
+
+impl Named for BoolMutator {
+    fn name(&self) -> &Cow<'static, str> {
+        &Cow::Borrowed("BoolMutator")
+    }
+}