feat: impl BorshSchema for char

borsh/src/schema.rs

@@ -350,6 +350,7 @@ macro_rules! impl_for_primitives {
 }
 
 impl_for_primitives!(bool => 1; f32 => 4; f64 => 8; i8 => 1; i16 => 2; i32 => 4; i64 => 8; i128 => 16);
+impl_for_primitives!(char => 4);
 impl_for_primitives!(u8 => 1; u16 => 2; u32 => 4; u64 => 8; u128 => 16);
 impl_for_renamed_primitives!(isize: i64 => 8);
 impl_for_renamed_primitives!(usize: u64 => 8);
@@ -737,6 +738,20 @@ mod tests {
         );
     }
 
+    #[test]
+    fn char() {
+        let actual_name = char::declaration();
+        let mut actual_defs = map!();
+        char::add_definitions_recursively(&mut actual_defs);
+        assert_eq!("char", actual_name);
+        assert_eq!(
+            map! {
+                "char" => Definition::Primitive(4)
+            },
+            actual_defs
+        );
+    }
+
     #[test]
     fn nested_option() {
         let actual_name = Option::<Option<u64>>::declaration();

borsh/src/schema/container_ext/max_size.rs

@@ -326,6 +326,7 @@ mod tests {
     fn max_serialized_size_primitives() {
         test_ok::<()>(0);
         test_ok::<bool>(1);
+        test_ok::<char>(4);
 
         test_ok::<f32>(4);
         test_ok::<f64>(8);