Merge pull request #3026 from Pana/op/migrateExternCrate

migrate extern crate code

crates/cfxcore/executor/src/builtin/mod.rs

@@ -512,20 +512,20 @@ impl Impl for ModexpImpl {
 
 fn read_fr(
     reader: &mut io::Chain<&[u8], io::Repeat>,
-) -> Result<::bn::Fr, Error> {
+) -> Result<crate::bn::Fr, Error> {
     let mut buf = [0u8; 32];
 
     reader
         .read_exact(&mut buf[..])
         .expect("reading from zero-extended memory cannot fail; qed");
-    ::bn::Fr::from_slice(&buf[0..32])
+    crate::bn::Fr::from_slice(&buf[0..32])
         .map_err(|_| Error::from("Invalid field element"))
 }
 
 fn read_point(
     reader: &mut io::Chain<&[u8], io::Repeat>,
-) -> Result<::bn::G1, Error> {
-    use bn::{AffineG1, Fq, Group, G1};
+) -> Result<crate::bn::G1, Error> {
+    use crate::bn::{AffineG1, Fq, Group, G1};
 
     let mut buf = [0u8; 32];
 
@@ -554,7 +554,7 @@ impl Impl for Bn128AddImpl {
     fn execute(
         &self, input: &[u8], output: &mut BytesRef,
     ) -> Result<(), Error> {
-        use bn::AffineG1;
+        use crate::bn::AffineG1;
 
         let mut padded_input = input.chain(io::repeat(0));
         let p1 = read_point(&mut padded_input)?;
@@ -582,7 +582,7 @@ impl Impl for Bn128MulImpl {
     fn execute(
         &self, input: &[u8], output: &mut BytesRef,
     ) -> Result<(), Error> {
-        use bn::AffineG1;
+        use crate::bn::AffineG1;
 
         let mut padded_input = input.chain(io::repeat(0));
         let p = read_point(&mut padded_input)?;
@@ -631,7 +631,9 @@ impl Bn128PairingImpl {
     fn execute_with_error(
         &self, input: &[u8], output: &mut BytesRef,
     ) -> Result<(), Error> {
-        use bn::{pairing, AffineG1, AffineG2, Fq, Fq2, Group, Gt, G1, G2};
+        use crate::bn::{
+            pairing, AffineG1, AffineG2, Fq, Fq2, Group, Gt, G1, G2,
+        };
 
         let elements = input.len() / 192; // (a, b_a, b_b - each 64-byte affine coordinates)
         let ret_val = if input.len() == 0 {

crates/cfxcore/executor/src/lib.rs

@@ -5,12 +5,11 @@
 
 #[macro_use]
 extern crate log;
-extern crate substrate_bn as bn;
 #[macro_use]
 extern crate lazy_static;
 #[macro_use]
 extern crate cfx_util_macros;
-extern crate sha3_macro;
+use substrate_bn as bn;
 
 /// Ethereum Builtins: Implements Ethereum's builtin contracts, ranging from
 /// address `0x1` to `0x9`.

crates/cfxcore/packing-pool/src/lib.rs

@@ -1,14 +1,3 @@
-extern crate cfx_math;
-extern crate cfx_types;
-extern crate heap_map;
-extern crate malloc_size_of;
-extern crate malloc_size_of_derive;
-extern crate primitives;
-extern crate rand;
-extern crate rand_xorshift;
-extern crate treap_map;
-extern crate typenum;
-
 mod key_mng;
 mod mock_tx;
 mod packing_batch;

crates/cfxcore/packing-pool/src/pool.rs

@@ -336,12 +336,12 @@ where
 mod pool_tests {
     use std::{collections::HashSet, sync::atomic::AtomicUsize};
 
+    use rand::SeedableRng;
     use rand_xorshift::XorShiftRng;
 
     use crate::{
-        mock_tx::MockTransaction, rand::SeedableRng,
-        transaction::PackingPoolTransaction, PackingBatch, PackingPool,
-        PackingPoolConfig, SampleTag,
+        mock_tx::MockTransaction, transaction::PackingPoolTransaction,
+        PackingBatch, PackingPool, PackingPoolConfig, SampleTag,
     };
 
     fn default_pool(

crates/dbs/db/src/rocksdb/mod.rs

@@ -18,10 +18,7 @@
 // Conflux is free software and distributed under GNU General Public License.
 // See http://www.gnu.org/licenses/
 
-extern crate core;
-extern crate kvdb_rocksdb;
-
-use self::kvdb_rocksdb::{CompactionProfile, Database, DatabaseConfig};
+use kvdb_rocksdb::{CompactionProfile, Database, DatabaseConfig};
 use std::{io, path::Path, str::FromStr, sync::Arc};
 
 pub struct SystemDB {

crates/dbs/storage/src/lib.rs

@@ -6,7 +6,6 @@
 #![allow(clippy::mut_from_ref, clippy::cast_ref_to_mut, clippy::drop_ref)]
 #![allow(deprecated)]
 
-//extern crate futures;
 #[macro_use]
 extern crate cfx_util_macros;
 #[macro_use]

crates/pos/common/num-variants/src/lib.rs

@@ -11,8 +11,6 @@
 #![forbid(unsafe_code)]
 #![warn(missing_docs)]
 
-extern crate proc_macro;
-
 use proc_macro2::{Ident, Span, TokenStream};
 use quote::quote;
 use syn::{

crates/pos/crypto/crypto-derive/src/lib.rs

@@ -102,8 +102,6 @@
 
 #![forbid(unsafe_code)]
 
-extern crate proc_macro;
-
 mod hasher;
 mod unions;
 

crates/util/hibitset/src/iter/parallel.rs

@@ -30,8 +30,6 @@ impl<T> BitParIter<T> {
     /// # Examples
     ///
     /// ```
-    /// # extern crate rayon;
-    /// # extern crate hibitset;
     /// # use hibitset::{BitSet, BitSetLike};
     /// # use rayon::iter::ParallelIterator;
     /// # fn main() {

crates/util/hibitset/src/lib.rs

@@ -45,13 +45,6 @@
 #![deny(missing_docs)]
 #![allow(clippy::all)]
 
-extern crate atom;
-extern crate malloc_size_of;
-#[cfg(test)]
-extern crate rand;
-#[cfg(feature = "parallel")]
-extern crate rayon;
-
 mod atomic;
 mod iter;
 mod ops;

crates/util/link-cut-tree/src/lib.rs

@@ -86,7 +86,6 @@ pub type CaterpillarMinLinkCutTree = MutexLinkCutTree<Caterpillar>;
 
 #[cfg(test)]
 mod tests {
-    extern crate rand;
     use super::{
         CaterpillarMinLinkCutTree, DefaultMinLinkCutTree,
         DeltaAndPreferredChild, Link, MutexLinkCutTree, SizeMinLinkCutTree,