libbinder_rs: (De)SerializeArray for Option<T>

To support read/write nullable array of parcelables, for
T:(De)SerializeOption, provide (De)SerializeArray as well.

Bug: n/a
Test: aidl_integration_test
Change-Id: I8c7e6de79a92fa9868335202837d14b138cdeb6d

3 files changed, 3 insertions, 11 deletions

diff --git a/libs/binder/rust/src/parcel/file_descriptor.rs b/libs/binder/rust/src/parcel/file_descriptor.rs
index f71a686959..8bcc5d0092 100644
--- a/libs/binder/rust/src/parcel/file_descriptor.rs
+++ b/libs/binder/rust/src/parcel/file_descriptor.rs
@@ -94,8 +94,6 @@ impl SerializeOption for ParcelFileDescriptor {
     }
 }
 
-impl SerializeArray for Option<ParcelFileDescriptor> {}
-
 impl DeserializeOption for ParcelFileDescriptor {
     fn deserialize_option(parcel: &Parcel) -> Result<Option<Self>> {
         let mut fd = -1i32;
@@ -126,8 +124,6 @@ impl DeserializeOption for ParcelFileDescriptor {
     }
 }
 
-impl DeserializeArray for Option<ParcelFileDescriptor> {}
-
 impl Deserialize for ParcelFileDescriptor {
     fn deserialize(parcel: &Parcel) -> Result<Self> {
         Deserialize::deserialize(parcel)
diff --git a/libs/binder/rust/src/parcel/parcelable.rs b/libs/binder/rust/src/parcel/parcelable.rs
index 499ef09e6a..ec00e1dc86 100644
--- a/libs/binder/rust/src/parcel/parcelable.rs
+++ b/libs/binder/rust/src/parcel/parcelable.rs
@@ -383,6 +383,9 @@ macro_rules! impl_parcelable {
     };
 }
 
+impl<T: DeserializeOption> DeserializeArray for Option<T> {}
+impl<T: SerializeOption> SerializeArray for Option<T> {}
+
 parcelable_primitives! {
     impl Serialize for bool = sys::AParcel_writeBool;
     impl Deserialize for bool = sys::AParcel_readBool;
@@ -537,8 +540,6 @@ impl SerializeOption for str {
     }
 }
 
-impl SerializeArray for Option<&str> {}
-
 impl Serialize for str {
     fn serialize(&self, parcel: &mut Parcel) -> Result<()> {
         Some(self).serialize(parcel)
@@ -561,8 +562,6 @@ impl SerializeOption for String {
     }
 }
 
-impl SerializeArray for Option<String> {}
-
 impl Deserialize for Option<String> {
     fn deserialize(parcel: &Parcel) -> Result<Self> {
         let mut vec: Option<Vec<u8>> = None;
diff --git a/libs/binder/rust/src/proxy.rs b/libs/binder/rust/src/proxy.rs
index 6a4af077c5..2c5b0a8421 100644
--- a/libs/binder/rust/src/proxy.rs
+++ b/libs/binder/rust/src/proxy.rs
@@ -429,8 +429,6 @@ impl SerializeOption for SpIBinder {
 }
 
 impl SerializeArray for SpIBinder {}
-impl SerializeArray for Option<&SpIBinder> {}
-impl SerializeArray for Option<SpIBinder> {}
 
 impl Deserialize for SpIBinder {
     fn deserialize(parcel: &Parcel) -> Result<SpIBinder> {
@@ -448,7 +446,6 @@ impl DeserializeOption for SpIBinder {
 }
 
 impl DeserializeArray for SpIBinder {}
-impl DeserializeArray for Option<SpIBinder> {}
 
 /// A weak reference to a Binder remote object.
 ///