Add readme

README.md

@@ -0,0 +1,71 @@
+# miniserde-enum
+
+This crate exposes derive macros for miniserde's `Serialize` and `Deserialize`
+traits on enums.
+
+The goal of this crate is to provide enum support like that of Serde for
+miniserde (see [Serde's list of enum representations](https://serde.rs/enum-representations.html)).
+
+# Examples
+
+## Deserializing an externally tagged enum
+```rust
+use miniserde::{Deserialize, json};
+use miniserde_enum::Deserialize_enum;
+
+#[derive(Deserialize_enum, Debug, PartialEq)]
+enum External {
+    A(i32),
+    #[serde(rename = "renamedB")]
+    B(i32, String),
+    C {
+        x: i32,
+    },
+    D,
+}
+use External::*;
+
+let example = r#"[{"A":21},{"renamedB":[42,"everything"]},{"C":{"x":2}},"D"]"#;
+let actual: Vec<External> = json::from_str(example).unwrap();
+let expected = [A(21), B(42, "everything".to_string()), C { x: 2 }, D];
+assert_eq!(actual, expected);
+```
+
+## Serializing an internally tagged enum
+```rust
+use miniserde::{json, Serialize};
+use miniserde_enum::Serialize_enum;
+
+#[serde(tag = "type")]
+#[derive(Serialize_enum)]
+enum Internal {
+    A,
+    #[serde(rename = "renamedB")]
+    B,
+    C {
+        x: i32,
+    },
+}
+use Internal::*;
+
+let example = [A, B, C { x: 2 }];
+let actual = json::to_string(&example[..]);
+let expected = r#"[{"type":"A"},{"type":"renamedB"},{"type":"C","x":2}]"#;
+assert_eq!(actual, expected);
+```
+
+More examples can be found in the [tests](https://github.com/etwyniel/miniserde-enum/tree/master/tests)
+directory.
+
+# TODO
+
+- Serialization:
+  - ~~Externally tagged enums~~
+  - ~~Internally tagged enums~~
+  - ~~Untagged enums~~
+  - Adjacently tagged enums
+- Deserialization
+  - ~~Externally tagged enums~~
+  - Internally tagged enums
+  - Untagged enums
+  - Adjacently tagged enums