warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:127:34
    |
127 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:118:34
    |
118 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/utilities.rs:103:34
    |
103 |             _phantom: PhantomData::default(),
    |                                  ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
  --> halo2_gadgets/src/utilities/lookup_range_check.rs:52:38
   |
52 |                 _phantom: PhantomData::default(),
   |                                      ^^^^^^^^^^^ help: remove this call to `default`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: very complex type used. Consider factoring parts into `type` definitions
   --> halo2_gadgets/src/sha256/table16/compression/compression_gates.rs:280:10
    |
280 |       ) -> Constraints<
    |  __________^
281 | |         F,
282 | |         (&'static str, Expression<F>),
283 | |         impl Iterator<Item = (&'static str, Expression<F>)>,
284 | |     > {
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity

warning: very complex type used. Consider factoring parts into `type` definitions
   --> halo2_gadgets/src/sha256/table16/compression/compression_gates.rs:105:10
    |
105 |       ) -> Constraints<
    |  __________^
106 | |         F,
107 | |         (&'static str, Expression<F>),
108 | |         impl Iterator<Item = (&'static str, Expression<F>)>,
109 | |     > {
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity

warning: very complex type used. Consider factoring parts into `type` definitions
  --> halo2_gadgets/src/sha256/table16/compression/compression_gates.rs:37:10
   |
37 |       ) -> Constraints<
   |  __________^
38 | |         F,
39 | |         (&'static str, Expression<F>),
40 | |         impl Iterator<Item = (&'static str, Expression<F>)>,
41 | |     > {
   | |_____^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
   = note: `-W clippy::type-complexity` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::type_complexity)]`

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon.rs:206:33
    |
206 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon.rs:159:33
    |
159 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:363:33
    |
363 |             _domain: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:257:33
    |
257 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> halo2_gadgets/src/poseidon/primitives.rs:220:33
    |
220 |             _marker: PhantomData::default(),
    |                                 ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
  --> halo2_gadgets/src/poseidon/primitives/grain.rs:72:32
   |
72 |             _field: PhantomData::default(),
   |                                ^^^^^^^^^^^ help: remove this call to `default`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs
   = note: `-W clippy::default-constructed-unit-structs` implied by `-W clippy::all`
   = help: to override `-W clippy::all` add `#[allow(clippy::default_constructed_unit_structs)]`

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:517:77
    |
517 |                 let r_0 = (p[0] + config.round_constants[round + 1][0]).pow(&config.alpha);
    |                                                                             ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:477:73
    |
477 |                 let r_0 = (p[0] + config.round_constants[round][0]).pow(&config.alpha);
    |                                                                         ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/poseidon/pow5.rs:451:62
    |
451 |             let r: Value<Vec<F>> = q.map(|q| q.map(|q| q.pow(&config.alpha))).collect();
    |                                                              ^^^^^^^^^^^^^ help: change this to: `config.alpha`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: usage of `Iterator::fold` on a type that implements `Try`
   --> halo2_gadgets/src/poseidon/pow5.rs:256:58
    |
256 |                   let state = (0..config.half_full_rounds).fold(Ok(state), |res, r| {
    |  __________________________________________________________^
257 | |                     res.and_then(|state| {
258 | |                         state.full_round(
259 | |                             &mut region,
...   |
264 | |                     })
265 | |                 })?;
    | |__________________^ help: use `try_fold` instead: `try_fold(state, |res, r| ...)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold

warning: usage of `Iterator::fold` on a type that implements `Try`
   --> halo2_gadgets/src/poseidon/pow5.rs:245:61
    |
245 |                   let state = (0..config.half_partial_rounds).fold(Ok(state), |res, r| {
    |  _____________________________________________________________^
246 | |                     res.and_then(|state| {
247 | |                         state.partial_round(
248 | |                             &mut region,
...   |
253 | |                     })
254 | |                 })?;
    | |__________________^ help: use `try_fold` instead: `try_fold(state, |res, r| ...)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold

warning: usage of `Iterator::fold` on a type that implements `Try`
   --> halo2_gadgets/src/poseidon/pow5.rs:241:58
    |
241 |                   let state = (0..config.half_full_rounds).fold(Ok(state), |res, r| {
    |  __________________________________________________________^
242 | |                     res.and_then(|state| state.full_round(&mut region, config, r, r))
243 | |                 })?;
    | |__________________^ help: use `try_fold` instead: `try_fold(state, |res, r| ...)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold
    = note: `-W clippy::manual-try-fold` implied by `-W clippy::all`
    = help: to override `-W clippy::all` add `#[allow(clippy::manual_try_fold)]`

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/mul_fixed.rs:395:42
    |
395 |             .map(|k| k * (*H_SCALAR).pow(&[(NUM_WINDOWS - 1) as u64, 0, 0, 0]) - offset_acc);
    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `[(NUM_WINDOWS - 1) as u64, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/mul_fixed.rs:390:37
    |
390 |             acc + (*TWO_SCALAR).pow(&[FIXED_BASE_WINDOW_SIZE as u64 * w as u64 + 1, 0, 0, 0])
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `[FIXED_BASE_WINDOW_SIZE as u64 * w as u64 + 1, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/mul_fixed.rs:373:68
    |
373 |         let scalar = k.map(|k| (k + *TWO_SCALAR) * (*H_SCALAR).pow(&[w as u64, 0, 0, 0]));
    |                                                                    ^^^^^^^^^^^^^^^^^^^^ help: change this to: `[w as u64, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/constants.rs:220:45
    |
220 |             * C::Scalar::from(H as u64).pow(&[(num_windows - 1) as u64, 0, 0, 0])
    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `[(num_windows - 1) as u64, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/constants.rs:217:42
    |
217 |             acc + C::Scalar::from(2).pow(&[FIXED_BASE_WINDOW_SIZE as u64 * w as u64 + 1, 0, 0, 0])
    |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `[FIXED_BASE_WINDOW_SIZE as u64 * w as u64 + 1, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args

warning: the borrowed expression implements the required traits
   --> halo2_gadgets/src/ecc/chip/constants.rs:200:53
    |
200 |                     * C::Scalar::from(H as u64).pow(&[idx as u64, 0, 0, 0]);
    |                                                     ^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `[idx as u64, 0, 0, 0]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args