serde_json1: add enum1

serde_json1/src/enum1.rs

@@ -0,0 +1,33 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, Eq, Deserialize, PartialEq, Serialize)]
+struct Z {
+    n: i32,
+}
+
+#[derive(Clone, Debug, Eq, Deserialize, PartialEq, Serialize)]
+#[serde(tag = "type")]
+enum X {
+    Y { s: String },
+    Z(Z),
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test() -> anyhow::Result<()> {
+        assert_eq!(
+            serde_json::to_string(&X::Y {
+                s: "123".to_string(),
+            })?,
+            r#"{"type":"Y","s":"123"}"#
+        );
+        assert_eq!(
+            serde_json::to_string(&X::Z(Z { n: 123 }))?,
+            r#"{"type":"Z","n":123}"#
+        );
+        Ok(())
+    }
+}

serde_json1/src/main.rs

@@ -1,4 +1,5 @@
 mod bool_from_01;
+mod enum1;
 
 fn main() {
     println!("Hello, world!");