cargo fix --edition for pairing

pairing/src/bls12_381/ec.rs

@@ -626,7 +626,7 @@ pub mod g1 {
     use group::{CurveAffine, CurveProjective, EncodedPoint, GroupDecodingError};
     use rand_core::RngCore;
     use std::fmt;
-    use {Engine, PairingCurveAffine};
+    use crate::{Engine, PairingCurveAffine};
 
     curve_impl!(
         "G1",
@@ -934,7 +934,7 @@ pub mod g1 {
 
     #[test]
     fn g1_generator() {
-        use SqrtField;
+        use crate::SqrtField;
 
         let mut x = Fq::zero();
         let mut i = 0;
@@ -1295,7 +1295,7 @@ pub mod g2 {
     use group::{CurveAffine, CurveProjective, EncodedPoint, GroupDecodingError};
     use rand_core::RngCore;
     use std::fmt;
-    use {Engine, PairingCurveAffine};
+    use crate::{Engine, PairingCurveAffine};
 
     curve_impl!(
         "G2",
@@ -1640,7 +1640,7 @@ pub mod g2 {
 
     #[test]
     fn g2_generator() {
-        use SqrtField;
+        use crate::SqrtField;
 
         let mut x = Fq2::zero();
         let mut i = 0;

pairing/src/bls12_381/fq.rs

@@ -2225,10 +2225,10 @@ fn test_fq_root_of_unity() {
 
 #[test]
 fn fq_field_tests() {
-    ::tests::field::random_field_tests::<Fq>();
-    ::tests::field::random_sqrt_tests::<Fq>();
-    ::tests::field::random_frobenius_tests::<Fq, _>(Fq::char(), 13);
-    ::tests::field::from_str_tests::<Fq>();
+    crate::tests::field::random_field_tests::<Fq>();
+    crate::tests::field::random_sqrt_tests::<Fq>();
+    crate::tests::field::random_frobenius_tests::<Fq, _>(Fq::char(), 13);
+    crate::tests::field::from_str_tests::<Fq>();
 }
 
 #[test]
@@ -2244,7 +2244,7 @@ fn test_fq_ordering() {
 
 #[test]
 fn fq_repr_tests() {
-    ::tests::repr::random_repr_tests::<Fq>();
+    crate::tests::repr::random_repr_tests::<Fq>();
 }
 
 #[test]

pairing/src/bls12_381/fq12.rs

@@ -187,6 +187,6 @@ fn test_fq12_mul_by_014() {
 fn fq12_field_tests() {
     use ff::PrimeField;
 
-    ::tests::field::random_field_tests::<Fq12>();
-    ::tests::field::random_frobenius_tests::<Fq12, _>(super::fq::Fq::char(), 13);
+    crate::tests::field::random_field_tests::<Fq12>();
+    crate::tests::field::random_frobenius_tests::<Fq12, _>(super::fq::Fq::char(), 13);
 }

pairing/src/bls12_381/fq2.rs

@@ -958,7 +958,7 @@ fn test_fq2_mul_nonresidue() {
 fn fq2_field_tests() {
     use ff::PrimeField;
 
-    ::tests::field::random_field_tests::<Fq2>();
-    ::tests::field::random_sqrt_tests::<Fq2>();
-    ::tests::field::random_frobenius_tests::<Fq2, _>(super::fq::Fq::char(), 13);
+    crate::tests::field::random_field_tests::<Fq2>();
+    crate::tests::field::random_sqrt_tests::<Fq2>();
+    crate::tests::field::random_frobenius_tests::<Fq2, _>(super::fq::Fq::char(), 13);
 }

pairing/src/bls12_381/fq6.rs

@@ -378,6 +378,6 @@ fn test_fq6_mul_by_01() {
 fn fq6_field_tests() {
     use ff::PrimeField;
 
-    ::tests::field::random_field_tests::<Fq6>();
-    ::tests::field::random_frobenius_tests::<Fq6, _>(super::fq::Fq::char(), 13);
+    crate::tests::field::random_field_tests::<Fq6>();
+    crate::tests::field::random_frobenius_tests::<Fq6, _>(super::fq::Fq::char(), 13);
 }

pairing/src/bls12_381/fr.rs

@@ -1015,13 +1015,13 @@ fn test_fr_root_of_unity() {
 
 #[test]
 fn fr_field_tests() {
-    ::tests::field::random_field_tests::<Fr>();
-    ::tests::field::random_sqrt_tests::<Fr>();
-    ::tests::field::random_frobenius_tests::<Fr, _>(Fr::char(), 13);
-    ::tests::field::from_str_tests::<Fr>();
+    crate::tests::field::random_field_tests::<Fr>();
+    crate::tests::field::random_sqrt_tests::<Fr>();
+    crate::tests::field::random_frobenius_tests::<Fr, _>(Fr::char(), 13);
+    crate::tests::field::from_str_tests::<Fr>();
 }
 
 #[test]
 fn fr_repr_tests() {
-    ::tests::repr::random_repr_tests::<Fr>();
+    crate::tests::repr::random_repr_tests::<Fr>();
 }

pairing/src/bls12_381/mod.rs

@@ -366,5 +366,5 @@ impl G2Prepared {
 
 #[test]
 fn bls12_engine_tests() {
-    ::tests::engine::engine_tests::<Bls12>();
+    crate::tests::engine::engine_tests::<Bls12>();
 }

pairing/src/bls12_381/tests/mod.rs

@@ -2,7 +2,7 @@ use ff::PrimeFieldRepr;
 use group::{CurveAffine, CurveProjective, EncodedPoint, GroupDecodingError};
 
 use super::*;
-use *;
+use crate::*;
 
 #[test]
 fn test_pairing_result_against_relic() {

pairing/src/lib.rs

@@ -87,7 +87,7 @@ pub trait Engine: ScalarEngine {
         >;
 
     /// Perform final exponentiation of the result of a miller loop.
-    fn final_exponentiation(&Self::Fqk) -> Option<Self::Fqk>;
+    fn final_exponentiation(_: &Self::Fqk) -> Option<Self::Fqk>;
 
     /// Performs a complete pairing operation `(p, q)`.
     fn pairing<G1, G2>(p: G1, q: G2) -> Self::Fqk

pairing/src/tests/engine.rs

@@ -2,7 +2,7 @@ use group::{CurveAffine, CurveProjective};
 use rand_core::SeedableRng;
 use rand_xorshift::XorShiftRng;
 
-use {Engine, Field, PairingCurveAffine, PrimeField};
+use crate::{Engine, Field, PairingCurveAffine, PrimeField};
 
 pub fn engine_tests<E: Engine>() {
     let mut rng = XorShiftRng::from_seed([