Address clippy lints

src/arithmetic.rs

@@ -47,9 +47,9 @@ where
 {
     fn batch_invert(self) -> F {
         let mut acc = F::one();
-        let mut iter = self.into_iter();
+        let iter = self.into_iter();
         let mut tmp = Vec::with_capacity(iter.size_hint().0);
-        while let Some(p) = iter.next() {
+        for p in iter {
             let q = *p;
             tmp.push((acc, p));
             acc = F::conditional_select(&(acc * q), &acc, q.is_zero());

src/plonk.rs

@@ -395,26 +395,26 @@ fn test_proving() {
             .unwrap();
         {
             let msm = guard.clone().use_challenges();
-            assert!(msm.is_zero());
+            assert!(msm.eval());
         }
         {
             let g = guard.compute_g();
             let (msm, _) = guard.clone().use_g(g);
-            assert!(msm.is_zero());
+            assert!(msm.eval());
         }
         let msm = guard.clone().use_challenges();
-        assert!(msm.clone().is_zero());
+        assert!(msm.clone().eval());
         let guard = proof
             .verify::<DummyHash<Fq>, DummyHash<Fp>>(&params, &srs, msm, &[pubinput])
             .unwrap();
         {
             let msm = guard.clone().use_challenges();
-            assert!(msm.is_zero());
+            assert!(msm.eval());
         }
         {
             let g = guard.compute_g();
             let (msm, _) = guard.clone().use_g(g);
-            assert!(msm.is_zero());
+            assert!(msm.eval());
         }
     }
 }

src/plonk/prover.rs

@@ -108,8 +108,7 @@ impl<C: CurveAffine> Proof<C> {
         }
 
         let aux_polys: Vec<_> = aux
-            .clone()
-            .into_iter()
+            .iter()
             .map(|poly| {
                 let lagrange_vec = domain.lagrange_from_vec(poly.to_vec());
                 domain.lagrange_to_coeff(lagrange_vec)
@@ -616,7 +615,7 @@ impl<C: CurveAffine> Proof<C> {
             let x_7: C::Scalar =
                 get_challenge_scalar(Challenge(transcript.squeeze().get_lower_128()));
 
-            let mut f_blind_dup = f_blind.clone();
+            let mut f_blind_dup = f_blind;
             let mut f_poly = f_poly.clone();
             for (_, &point_index) in meta.rotations.iter() {
                 f_blind_dup *= x_7;
@@ -632,10 +631,11 @@ impl<C: CurveAffine> Proof<C> {
                     }
                 });
             }
-            let opening = OpeningProof::create(&params, &mut transcript, &f_poly, f_blind_dup, x_6);
 
-            if opening.is_ok() {
-                break (opening.unwrap(), q_evals);
+            if let Ok(opening) =
+                OpeningProof::create(&params, &mut transcript, &f_poly, f_blind_dup, x_6)
+            {
+                break (opening, q_evals);
             } else {
                 f_blind += C::Scalar::one();
                 f_commitment = (f_commitment + params.h).to_affine();

src/poly.rs

@@ -119,9 +119,9 @@ impl<F, B> Polynomial<F, B> {
         self.values.iter_mut()
     }
 
-    /// Gets the length of this polynomial in terms of the number of
+    /// Gets the size of this polynomial in terms of the number of
     /// coefficients used to describe it.
-    pub fn len(&self) -> usize {
+    pub fn num_coeffs(&self) -> usize {
         self.values.len()
     }
 }

src/poly/commitment.rs

@@ -60,8 +60,8 @@ impl<'a, C: CurveAffine> MSM<'a, C> {
 
     /// Add arbitrary term (the scalar and the point)
     pub fn add_term(&mut self, scalar: C::Scalar, point: C) {
-        &self.other_scalars.push(scalar);
-        &self.other_bases.push(point);
+        self.other_scalars.push(scalar);
+        self.other_bases.push(point);
     }
 
     /// Add a vector of scalars to `g_scalars`. This function will panic if the
@@ -100,7 +100,7 @@ impl<'a, C: CurveAffine> MSM<'a, C> {
     }
 
     /// Perform multiexp and check that it results in zero
-    pub fn is_zero(self) -> bool {
+    pub fn eval(self) -> bool {
         let len = self.g_scalars.as_ref().map(|v| v.len()).unwrap_or(0)
             + self.h_scalar.map(|_| 1).unwrap_or(0)
             + self.other_scalars.len();
@@ -304,7 +304,7 @@ impl<'a, C: CurveAffine> Guard<'a, C> {
     /// Lets caller supply the purported G point and simply appends it to
     /// return an updated MSM.
     pub fn use_g(mut self, g: C) -> (MSM<'a, C>, Accumulator<C>) {
-        &self.msm.add_term(self.neg_z1, g);
+        self.msm.add_term(self.neg_z1, g);
 
         let accumulator = Accumulator {
             g,
@@ -458,12 +458,12 @@ fn test_opening_proof() {
             {
                 // Test use_challenges()
                 let msm_challenges = guard.clone().use_challenges();
-                assert!(msm_challenges.is_zero());
+                assert!(msm_challenges.eval());
 
                 // Test use_g()
                 let g = guard.compute_g();
                 let (msm_g, _accumulator) = guard.clone().use_g(g);
-                assert!(msm_g.is_zero());
+                assert!(msm_g.eval());
             }
 
             // Check another proof to populate `msm.g_scalars`
@@ -483,12 +483,12 @@ fn test_opening_proof() {
 
             // Test use_challenges()
             let msm_challenges = guard.clone().use_challenges();
-            assert!(msm_challenges.is_zero());
+            assert!(msm_challenges.eval());
 
             // Test use_g()
             let g = guard.compute_g();
             let (msm_g, _accumulator) = guard.clone().use_g(g);
-            assert!(msm_g.is_zero());
+            assert!(msm_g.eval());
 
             break;
         }