message: ff_derive: Fix various clippy issues
diff: @@ -40,7 +40,7 @@ pub fn prime_field(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
  let mut cur = BigUint::one() << 64; // always 64-bit limbs for now
  while cur < mod2 {
  limbs += 1;
  - cur = cur << 64;
  + cur <<= 64;
  }
  }
  @@ -60,23 +60,16 @@ pub fn prime_field(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
  /// Fetches the ident being wrapped by the type we're deriving.
  fn fetch_wrapped_ident(body: &syn::Data) -> Option<syn::Ident> {
  - match body {
  - &syn::Data::Struct(ref variant_data) => match variant_data.fields {
  - syn::Fields::Unnamed(ref fields) => {
  + if let syn::Data::Struct(ref variant_data) = body {
  + if let syn::Fields::Unnamed(ref fields) = variant_data.fields {
  if fields.unnamed.len() == 1 {
  - match fields.unnamed[0].ty {
  - syn::Type::Path(ref path) => {
  + if let syn::Type::Path(ref path) = fields.unnamed[0].ty {
  if path.path.segments.len() == 1 {
  return Some(path.path.segments[0].ident.clone());
  }
  }
  - _ => {}
  }
  }
  - }
  - _ => {}
  - },
  - _ => {}
  };
  None
  @@ -315,7 +308,7 @@ fn biguint_to_real_u64_vec(mut v: BigUint, limbs: usize) -> Vec<u64> {
  while v > BigUint::zero() {
  ret.push((&v % &m).to_u64().unwrap());
  - v = v >> 64;
  + v >>= 64;
  }
  while ret.len() < limbs {
  @@ -337,7 +330,7 @@ fn biguint_num_bits(mut v: BigUint) -> u32 {
  let mut bits = 0;
  while v != BigUint::zero() {
  - v = v >> 1;
  + v >>= 1;
  bits += 1;
  }
  @@ -402,7 +395,7 @@ fn prime_field_constants_and_sqrt(
  let mut s: u32 = 0;
  let mut t = modulus - BigUint::from_str("1").unwrap();
  while t.is_even() {
  - t = t >> 1;
  + t >>= 1;
  s += 1;
  }
  @@ -684,7 +677,7 @@ fn prime_field_impl(
  let mut mont_calling = proc_macro2::TokenStream::new();
  mont_calling.append_separated(
  - (0..(limbs * 2)).map(|i| get_temp(i)),
  + (0..(limbs * 2)).map(get_temp),
  proc_macro2::Punct::new(',', proc_macro2::Spacing::Alone),
  );
  @@ -732,7 +725,7 @@ fn prime_field_impl(
  let mut mont_calling = proc_macro2::TokenStream::new();
  mont_calling.append_separated(
  - (0..(limbs * 2)).map(|i| get_temp(i)),
  + (0..(limbs * 2)).map(get_temp),
  proc_macro2::Punct::new(',', proc_macro2::Spacing::Alone),
  );
  