Clippy: introducing clippy.toml

And add support up to 8 arguments.

clippy.toml

@@ -0,0 +1,6 @@
+# Default is 7. However, it seems to be arbitrary. Some protocols do require
+# many parameters, like polynomial commitment scheme when we want to make an
+# opening.
+# Note that we should not use too much this threshold, and stay clean in the
+# choice of our routine parameters.
+too-many-arguments-threshold = 8

poly-commitment/src/ipa.rs

@@ -835,7 +835,6 @@ impl<G: CommitmentCurve> SRS<G> {
     /// - rng: used for blinders for the zk property
     /// A slight modification to the original protocol is done
     /// when absorbing the first prover message.
-    #[allow(clippy::too_many_arguments)]
     #[allow(clippy::type_complexity)]
     #[allow(clippy::many_single_char_names)]
     pub fn open<EFqSponge, RNG, D: EvaluationDomain<G::ScalarField>>(

poly-commitment/src/lib.rs

@@ -172,7 +172,6 @@ pub trait OpenProof<G: CommitmentCurve>: Sized + Clone {
     /// - `sponge`: Sponge used to coin and absorb values and simulate
     /// non-interactivity using the Fiat-Shamir transformation.
     /// - `rng`: a pseudo random number generator in case blinding is needed
-    #[allow(clippy::too_many_arguments)]
     fn open<EFqSponge, RNG, D: EvaluationDomain<<G as AffineRepr>::ScalarField>>(
         srs: &Self::SRS,
         group_map: &<G as CommitmentCurve>::Map,