feat: sideffect/mutating should take FnMut over Fn

util/src/functional.rs

@@ -1,6 +1,6 @@
 pub fn mutating<T, F>(mut v: T, f: F) -> T
 where
-    F: Fn(&mut T),
+    F: FnMut(&mut T),
 {
     f(&mut v);
     v
@@ -9,32 +9,32 @@ where
 pub trait MutatingExt {
     fn mutating<F>(self, f: F) -> Self
     where
-        F: Fn(&mut Self);
+        F: FnMut(&mut Self);
     fn mutating_mut<F>(&mut self, f: F) -> &mut Self
     where
-        F: Fn(&mut Self);
+        F: FnMut(&mut Self);
 }
 
 impl<T> MutatingExt for T {
     fn mutating<F>(self, f: F) -> Self
     where
-        F: Fn(&mut Self),
+        F: FnMut(&mut Self),
     {
         mutating(self, f)
     }
 
-    fn mutating_mut<F>(&mut self, f: F) -> &mut Self
+    fn mutating_mut<F>(&mut self, mut f: F) -> &mut Self
     where
-        F: Fn(&mut Self),
+        F: FnMut(&mut Self),
     {
         f(self);
         self
     }
 }
 
-pub fn sideeffect<T, F>(v: T, f: F) -> T
+pub fn sideeffect<T, F>(v: T, mut f: F) -> T
 where
-    F: Fn(&T),
+    F: FnMut(&T),
 {
     f(&v);
     v
@@ -43,34 +43,34 @@ where
 pub trait SideffectExt {
     fn sideeffect<F>(self, f: F) -> Self
     where
-        F: Fn(&Self);
+        F: FnMut(&Self);
     fn sideeffect_ref<F>(&self, f: F) -> &Self
     where
-        F: Fn(&Self);
+        F: FnMut(&Self);
     fn sideeffect_mut<F>(&mut self, f: F) -> &mut Self
     where
-        F: Fn(&Self);
+        F: FnMut(&Self);
 }
 
 impl<T> SideffectExt for T {
     fn sideeffect<F>(self, f: F) -> Self
     where
-        F: Fn(&Self),
+        F: FnMut(&Self),
     {
         sideeffect(self, f)
     }
 
-    fn sideeffect_ref<F>(&self, f: F) -> &Self
+    fn sideeffect_ref<F>(&self, mut f: F) -> &Self
     where
-        F: Fn(&Self),
+        F: FnMut(&Self),
     {
         f(self);
         self
     }
 
-    fn sideeffect_mut<F>(&mut self, f: F) -> &mut Self
+    fn sideeffect_mut<F>(&mut self, mut f: F) -> &mut Self
     where
-        F: Fn(&Self),
+        F: FnMut(&Self),
     {
         f(self);
         self