added serde feature flag to enable serde support for Iban type

Cargo.toml

@@ -12,6 +12,7 @@ rust-version = "1.60.0"
 default = ["std"]
 std = []
 rand = ["dep:rand"]
+serde = ["dep:serde", "arrayvec/serde"]
 
 [package.metadata.docs.rs]
 rustdoc-args = ["--cfg", "docsrs"]
@@ -21,6 +22,7 @@ all-features = true
 arrayvec = { version = "0.7", default-features = false }
 phf = { version = "0.11", default-features = false }
 rand = { version = "0.8", default-features = false, optional = true }
+serde = { version = "1.0.7", default-features = false, features = ["derive"], optional = true }
 
 [build-dependencies]
 csv = "1"
@@ -30,6 +32,7 @@ regex = "1"
 serde = { version = "1.0.7", features = ["derive"] }
 
 [dev-dependencies]
+serde_json = "1"
 test-case = "3"
 rand = "0.8"
 

src/lib.rs

@@ -34,6 +34,7 @@ const IBAN_MAX_LENGTH: usize = 34;
 /// Electronic formatting can be obtained from the [`Debug`](std::fmt::Debug), [`Deref`](std::ops::Deref),
 /// or [`AsRef`](std::convert::AsRef) implementations.
 #[derive(Clone, Copy, Eq, PartialEq, Hash)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct Iban(ArrayString<IBAN_MAX_LENGTH>);
 
 /// Represents the Basic Bank Account Number (BBAN) portion of an International Bank Account Number (IBAN).
@@ -637,6 +638,18 @@ mod tests {
         assert_eq!(iban.to_string().as_str(), "AE07 0331 2345 6789 0123 456");
     }
 
+    #[cfg(feature = "serde")]
+    #[test]
+    fn iban_serde() {
+        let iban = Iban::parse("AD1200012030200359100100").unwrap();
+        let json = serde_json::to_string(&iban).unwrap();
+
+        assert_eq!(json, r#""AD1200012030200359100100""#);
+
+        let new_iban: Iban = serde_json::from_str(&json).unwrap();
+        assert_eq!(iban, new_iban);
+    }
+
     #[test]
     fn bban_display_impl() {
         let iban = Iban::parse("AD1200012030200359100100").unwrap();