Migrate import statements and macros to Rust 2018.

libraries/cbor/fuzz/fuzz_targets/fuzz_target_cbor.rs

@@ -1,10 +1,8 @@
 #![no_main]
-#[macro_use]
-extern crate libfuzzer_sys;
 extern crate alloc;
-extern crate cbor;
 
 use alloc::vec::Vec;
+use libfuzzer_sys::fuzz_target;
 
 fuzz_target!(|data: &[u8]| {
     if let Ok(value) = cbor::read(data) {

libraries/cbor/src/lib.rs

@@ -18,7 +18,6 @@ extern crate alloc;
 #[cfg(feature = "std")]
 extern crate core;
 
-#[macro_use]
 pub mod macros;
 pub mod reader;
 pub mod values;

libraries/cbor/src/macros.rs

@@ -38,8 +38,7 @@ use core::iter::Peekable;
 ///
 /// ```rust
 /// # extern crate alloc;
-/// # #[macro_use]
-/// # extern crate cbor;
+/// # use cbor::destructure_cbor_map;
 /// #
 /// # fn main() {
 /// #     let map = alloc::collections::BTreeMap::new();
@@ -54,8 +53,6 @@ use core::iter::Peekable;
 ///
 /// ```rust
 /// # extern crate alloc;
-/// # #[macro_use]
-/// # extern crate cbor;
 /// #
 /// # fn main() {
 /// #     let mut map = alloc::collections::BTreeMap::<cbor::KeyType, _>::new();
@@ -71,7 +68,7 @@ macro_rules! destructure_cbor_map {
         // sorted - the behavior is unspecified if the keys are not sorted.
         // Therefore, in test mode we add assertions that the keys are indeed sorted.
         #[cfg(test)]
-        assert_sorted_keys!($( $key, )+);
+        $crate::assert_sorted_keys!($( $key, )+);
 
         use $crate::values::{IntoCborKey, Value};
         use $crate::macros::destructure_cbor_map_peek_value;
@@ -144,7 +141,7 @@ macro_rules! assert_sorted_keys {
                 k2,
             );
         }
-        assert_sorted_keys!($key2, $( $keys, )*);
+        $crate::assert_sorted_keys!($key2, $( $keys, )*);
     };
 }
 
@@ -227,7 +224,7 @@ macro_rules! cbor_array_vec {
     }};
 }
 
-#[cfg(test)]
+#[macro_export]
 macro_rules! cbor_true {
     ( ) => {
         $crate::values::Value::Simple($crate::values::SimpleValue::TrueValue)
@@ -248,7 +245,7 @@ macro_rules! cbor_null {
     };
 }
 
-#[cfg(test)]
+#[macro_export]
 macro_rules! cbor_undefined {
     ( ) => {
         $crate::values::Value::Simple($crate::values::SimpleValue::Undefined)
@@ -267,28 +264,28 @@ macro_rules! cbor_bool {
 #[macro_export]
 macro_rules! cbor_unsigned {
     ( $x:expr ) => {
-        cbor_key_unsigned!($x).into()
+        $crate::cbor_key_unsigned!($x).into()
     };
 }
 
 #[macro_export]
 macro_rules! cbor_int {
     ( $x:expr ) => {
-        cbor_key_int!($x).into()
+        $crate::cbor_key_int!($x).into()
     };
 }
 
 #[macro_export]
 macro_rules! cbor_text {
     ( $x:expr ) => {
-        cbor_key_text!($x).into()
+        $crate::cbor_key_text!($x).into()
     };
 }
 
 #[macro_export]
 macro_rules! cbor_bytes {
     ( $x:expr ) => {
-        cbor_key_bytes!($x).into()
+        $crate::cbor_key_bytes!($x).into()
     };
 }
 
@@ -296,7 +293,7 @@ macro_rules! cbor_bytes {
 #[macro_export]
 macro_rules! cbor_bytes_lit {
     ( $x:expr ) => {
-        cbor_bytes!(($x as &[u8]).to_vec())
+        $crate::cbor_bytes!(($x as &[u8]).to_vec())
     };
 }
 

libraries/cbor/src/reader.rs

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 use super::values::{Constants, KeyType, SimpleValue, Value};
+use crate::{cbor_array_vec, cbor_bytes_lit, cbor_map_btree, cbor_text, cbor_unsigned};
 use alloc::collections::BTreeMap;
 use alloc::str;
 use alloc::vec::Vec;
@@ -214,6 +215,10 @@ impl<'a> Reader<'a> {
 #[cfg(test)]
 mod test {
     use super::*;
+    use crate::{
+        cbor_array, cbor_bytes, cbor_false, cbor_int, cbor_map, cbor_null, cbor_true,
+        cbor_undefined,
+    };
 
     #[test]
     fn test_read_unsigned() {

libraries/cbor/src/values.rs

@@ -239,6 +239,8 @@ where
 
 #[cfg(test)]
 mod test {
+    use crate::{cbor_key_bytes, cbor_key_int, cbor_key_text};
+
     #[test]
     fn test_key_type_ordering() {
         assert!(cbor_key_int!(0) < cbor_key_int!(23));

libraries/cbor/src/writer.rs

@@ -92,6 +92,10 @@ impl<'a> Writer<'a> {
 #[cfg(test)]
 mod test {
     use super::*;
+    use crate::{
+        cbor_array, cbor_array_vec, cbor_bytes, cbor_false, cbor_int, cbor_map, cbor_null,
+        cbor_text, cbor_true, cbor_undefined,
+    };
 
     fn write_return(value: Value) -> Option<Vec<u8>> {
         let mut encoded_cbor = Vec::new();