Fix clippy lints (#19)

Author: laurmaedje

src/constraint.rs

@@ -114,13 +114,13 @@ impl<C: Hash> CallSequence<C> {
             #[allow(unused_variables)]
             Entry::Occupied(entry) => {
                 #[cfg(debug_assertions)]
-                if let Some((_, ret2)) = &self.vec[*entry.get()] {
-                    if ret != *ret2 {
-                        panic!(
-                            "comemo: found differing return values. \
-                             is there an impure tracked function?"
-                        )
-                    }
+                if let Some((_, ret2)) = &self.vec[*entry.get()]
+                    && ret != *ret2
+                {
+                    panic!(
+                        "comemo: found differing return values. \
+                         is there an impure tracked function?"
+                    )
                 }
                 false
             }

src/input.rs

@@ -228,6 +228,7 @@ macro_rules! multi {
         }
 
         #[derive(Copy, Clone)]
+        #[allow(dead_code)]
         pub struct MappedSink<const I: usize, S>(S);
 
         $(multi!(@mapped $param $idx; $params);)*

tests/tests.rs

@@ -152,11 +152,11 @@ fn test_tracked_trait() {
         loader.load(path).unwrap()
     }
 
-    fn wrapper(loader: &(dyn Loader), path: &Path) -> Vec<u8> {
+    fn wrapper(loader: &dyn Loader, path: &Path) -> Vec<u8> {
         traity(loader.track(), path)
     }
 
-    let loader: &(dyn Loader) = &StaticLoader;
+    let loader: &dyn Loader = &StaticLoader;
     test!(miss: traity(loader.track(), Path::new("hi.rs")), [1, 2, 3]);
     test!(hit: traity(loader.track(), Path::new("hi.rs")), [1, 2, 3]);
     test!(miss: traity(loader.track(), Path::new("bye.rs")), [1, 2, 3]);