feat: 为 ChoiceBlock 添加默认实现，简化实例化过程

Author: ZR233

kconfig-serde/src/converter.rs

@@ -66,12 +66,7 @@ impl KconfigConverter {
     }
 
     fn end_menu_block(&mut self) -> Option<MenuBlock> {
-        if let Some(menu) = self.menu_stack.pop() {
-            // Add the completed menu to elements
-            Some(menu)
-        } else {
-            None
-        }
+        self.menu_stack.pop().map(|menu| menu)
     }
 
     fn add_config_option(&mut self, config: ConfigOption) {
@@ -92,7 +87,7 @@ impl Default for KconfigConverter {
     }
 }
 
-impl<'a> ser::Serializer for &'a mut KconfigConverter {
+impl ser::Serializer for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -301,7 +296,7 @@ impl<'a> ser::Serializer for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeMap for &'a mut KconfigConverter {
+impl ser::SerializeMap for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -321,7 +316,7 @@ impl<'a> ser::SerializeMap for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeStruct for &'a mut KconfigConverter {
+impl ser::SerializeStruct for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -348,7 +343,7 @@ impl<'a> ser::SerializeStruct for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeSeq for &'a mut KconfigConverter {
+impl ser::SerializeSeq for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -363,7 +358,7 @@ impl<'a> ser::SerializeSeq for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeTuple for &'a mut KconfigConverter {
+impl ser::SerializeTuple for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -376,7 +371,7 @@ impl<'a> ser::SerializeTuple for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeTupleStruct for &'a mut KconfigConverter {
+impl ser::SerializeTupleStruct for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -389,7 +384,7 @@ impl<'a> ser::SerializeTupleStruct for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeTupleVariant for &'a mut KconfigConverter {
+impl ser::SerializeTupleVariant for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 
@@ -402,7 +397,7 @@ impl<'a> ser::SerializeTupleVariant for &'a mut KconfigConverter {
     }
 }
 
-impl<'a> ser::SerializeStructVariant for &'a mut KconfigConverter {
+impl ser::SerializeStructVariant for &mut KconfigConverter {
     type Ok = ();
     type Error = crate::error::Error;
 

kconfig-serde/src/elements.rs

@@ -172,6 +172,12 @@ pub struct ChoiceBlock {
     pub elements: Vec<String>, // config names
 }
 
+impl Default for ChoiceBlock {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ChoiceBlock {
     pub fn new() -> Self {
         Self {