chore: bit setter and clearer return mutable references to Self (#112)

* chore: bit setter and clearer return mutable references to `Self`

* chore: add a changelog

Author: toku-sa-n

CHANGELOG.md

@@ -7,6 +7,7 @@
 ### Changed
 - `set_xxx(true_or_false)` methods of the Registers and the Extended Capabilities are split into `set_xxx()` and `clear_xxx()`.
 - `CapabilityParameters1::max_primary_stream_array_size` is renamed to `CapabilityParameters1::maximum_primary_stream_array_size`.
+- Bit setter and clearer now return mutable references to `Self`.
 
 ## 0.6.0 - 2021-04-27
 ### Added

src/macros.rs

@@ -31,17 +31,19 @@ macro_rules! bit_modifier {
             #[doc = "Sets the"]
             #[doc = $name]
             #[doc = "bit."]
-            pub fn [<set_ $method>](&mut self){
+            pub fn [<set_ $method>](&mut self)->&mut Self{
                 use bit_field::BitField;
                 self.0.set_bit($bit,true);
+                self
             }
 
             #[doc = "Clears the"]
             #[doc = $name]
             #[doc = "bit."]
-            pub fn [<clear_ $method>](&mut self){
+            pub fn [<clear_ $method>](&mut self)->&mut Self{
                 use bit_field::BitField;
                 self.0.set_bit($bit,false);
+                self
             }
         }
     };
@@ -73,9 +75,10 @@ macro_rules! rw1c_bit {
             #[doc = "Clears the"]
             #[doc = $name]
             #[doc = "bit."]
-            pub fn [<clear_ $method>](&mut self){
+            pub fn [<clear_ $method>](&mut self)->&mut Self{
                 use bit_field::BitField;
                 self.0.set_bit($bit,true);
+                self
             }
         }
     };
@@ -87,9 +90,10 @@ macro_rules! w1s_bit {
             #[doc = "Sets the"]
             #[doc = $name]
             #[doc = "bit."]
-            pub fn [<set_ $method>](&mut self){
+            pub fn [<set_ $method>](&mut self)->&mut Self{
                 use bit_field::BitField;
                 self.0.set_bit($bit,true);
+                self
             }
         }
     };