Merge pull request #16 from alvinhochun/serde

Handle deserialization of all integer and impl. serde for all enum types

src/serde/de.rs

@@ -7,7 +7,10 @@ use crate::result::EvalAltResult;
 use crate::token::Position;
 use crate::utils::ImmutableString;
 
-use serde::de::{DeserializeSeed, Deserializer, Error, MapAccess, SeqAccess, Visitor};
+use serde::de::{
+    DeserializeSeed, Deserializer, EnumAccess, Error, IntoDeserializer, MapAccess, SeqAccess,
+    VariantAccess, Visitor,
+};
 use serde::Deserialize;
 
 #[cfg(not(feature = "no_index"))]
@@ -49,6 +52,20 @@ impl<'de> DynamicDeserializer<'de> {
             Position::none(),
         )))
     }
+    fn deserialize_int<V: Visitor<'de>>(
+        &mut self,
+        v: crate::INT,
+        visitor: V,
+    ) -> Result<V::Value, Box<EvalAltResult>> {
+        #[cfg(not(feature = "only_i32"))]
+        {
+            visitor.visit_i64(v)
+        }
+        #[cfg(feature = "only_i32")]
+        {
+            visitor.visit_i32(v)
+        }
+    }
 }
 
 /// Deserialize a `Dynamic` value into a Rust type that implements `serde::Deserialize`.
@@ -159,52 +176,88 @@ impl<'de> Deserializer<'de> for &mut DynamicDeserializer<'de> {
     }
 
     fn deserialize_i8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<i8>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_i8(x))
         }
+    }
 
     fn deserialize_i16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<i16>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_i16(x))
         }
+    }
 
     fn deserialize_i32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else if cfg!(feature = "only_i32") {
+            self.type_error()
+        } else {
             self.value
                 .downcast_ref::<i32>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_i32(x))
         }
+    }
 
     fn deserialize_i64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else if cfg!(not(feature = "only_i32")) {
+            self.type_error()
+        } else {
             self.value
                 .downcast_ref::<i64>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_i64(x))
         }
+    }
 
     fn deserialize_u8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<u8>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_u8(x))
         }
+    }
 
     fn deserialize_u16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<u16>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_u16(x))
         }
+    }
 
     fn deserialize_u32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<u32>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_u32(x))
         }
+    }
 
     fn deserialize_u64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(v) = self.value.as_int() {
+            self.deserialize_int(v, visitor)
+        } else {
             self.value
                 .downcast_ref::<u64>()
                 .map_or_else(|| self.type_error(), |&x| visitor.visit_u64(x))
         }
+    }
 
     fn deserialize_f32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Box<EvalAltResult>> {
         #[cfg(not(feature = "no_float"))]
@@ -334,10 +387,31 @@ impl<'de> Deserializer<'de> for &mut DynamicDeserializer<'de> {
         self,
         _name: &'static str,
         _variants: &'static [&'static str],
-        _: V,
+        visitor: V,
     ) -> Result<V::Value, Box<EvalAltResult>> {
+        if let Ok(s) = self.value.as_str() {
+            visitor.visit_enum(s.into_deserializer())
+        } else {
+            #[cfg(not(feature = "no_object"))]
+            if let Some(map) = self.value.downcast_ref::<Map>() {
+                let mut iter = map.iter();
+                let first = iter.next();
+                let second = iter.next();
+                if let (Some((key, value)), None) = (first, second) {
+                    visitor.visit_enum(EnumDeserializer {
+                        tag: &key,
+                        content: DynamicDeserializer::from_dynamic(value),
+                    })
+                } else {
                     self.type_error()
                 }
+            } else {
+                self.type_error()
+            }
+            #[cfg(feature = "no_object")]
+            return self.type_error();
+        }
+    }
 
     fn deserialize_identifier<V: Visitor<'de>>(
         self,
@@ -444,3 +518,57 @@ where
         ))
     }
 }
+
+#[cfg(not(feature = "no_object"))]
+struct EnumDeserializer<'t, 'de: 't> {
+    tag: &'t str,
+    content: DynamicDeserializer<'de>,
+}
+
+#[cfg(not(feature = "no_object"))]
+impl<'t, 'de> EnumAccess<'de> for EnumDeserializer<'t, 'de> {
+    type Error = Box<EvalAltResult>;
+    type Variant = Self;
+
+    fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
+    where
+        V: DeserializeSeed<'de>,
+    {
+        seed.deserialize(self.tag.into_deserializer())
+            .map(|v| (v, self))
+    }
+}
+
+#[cfg(not(feature = "no_object"))]
+impl<'t, 'de> VariantAccess<'de> for EnumDeserializer<'t, 'de> {
+    type Error = Box<EvalAltResult>;
+
+    fn unit_variant(mut self) -> Result<(), Self::Error> {
+        Deserialize::deserialize(&mut self.content)
+    }
+
+    fn newtype_variant_seed<T>(mut self, seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: DeserializeSeed<'de>,
+    {
+        seed.deserialize(&mut self.content)
+    }
+
+    fn tuple_variant<V>(mut self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: Visitor<'de>,
+    {
+        self.content.deserialize_tuple(len, visitor)
+    }
+
+    fn struct_variant<V>(
+        mut self,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: Visitor<'de>,
+    {
+        self.content.deserialize_struct("", fields, visitor)
+    }
+}

src/serde/ser.rs

@@ -103,10 +103,16 @@ impl Serializer for &mut DynamicSerializer {
     type SerializeSeq = DynamicSerializer;
     type SerializeTuple = DynamicSerializer;
     type SerializeTupleStruct = DynamicSerializer;
-    type SerializeTupleVariant = DynamicSerializer;
+    #[cfg(not(any(feature = "no_object", feature = "no_index")))]
+    type SerializeTupleVariant = TupleVariantSerializer;
+    #[cfg(any(feature = "no_object", feature = "no_index"))]
+    type SerializeTupleVariant = serde::ser::Impossible<Dynamic, Box<EvalAltResult>>;
     type SerializeMap = DynamicSerializer;
     type SerializeStruct = DynamicSerializer;
-    type SerializeStructVariant = DynamicSerializer;
+    #[cfg(not(feature = "no_object"))]
+    type SerializeStructVariant = StructVariantSerializer;
+    #[cfg(feature = "no_object")]
+    type SerializeStructVariant = serde::ser::Impossible<Dynamic, Box<EvalAltResult>>;
 
     fn serialize_bool(self, v: bool) -> Result<Self::Ok, Box<EvalAltResult>> {
         Ok(v.into())
@@ -162,7 +168,7 @@ impl Serializer for &mut DynamicSerializer {
         #[cfg(not(feature = "only_i32"))]
         return self.serialize_i64(i64::from(v));
         #[cfg(feature = "only_i32")]
-        if v > i32::MAX as u64 {
+        if v > i32::MAX as u32 {
             return Ok(Dynamic::from(v));
         } else {
             return self.serialize_i32(v as i32);
@@ -244,10 +250,20 @@ impl Serializer for &mut DynamicSerializer {
         self,
         _name: &'static str,
         _variant_index: u32,
-        _variant: &'static str,
+        variant: &'static str,
         value: &T,
     ) -> Result<Self::Ok, Box<EvalAltResult>> {
-        value.serialize(&mut *self)
+        #[cfg(not(feature = "no_object"))]
+        {
+            let content = to_dynamic(value)?;
+            make_variant(variant, content)
+        }
+        #[cfg(feature = "no_object")]
+        return Err(Box::new(EvalAltResult::ErrorMismatchOutputType(
+            "Dynamic".into(),
+            "map".into(),
+            Position::none(),
+        )));
     }
 
     fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Box<EvalAltResult>> {
@@ -277,10 +293,26 @@ impl Serializer for &mut DynamicSerializer {
         self,
         _name: &'static str,
         _variant_index: u32,
-        _variant: &'static str,
+        variant: &'static str,
         len: usize,
     ) -> Result<Self::SerializeTupleVariant, Box<EvalAltResult>> {
-        self.serialize_seq(Some(len))
+        #[cfg(not(any(feature = "no_object", feature = "no_index")))]
+        return Ok(TupleVariantSerializer {
+            variant,
+            array: Array::with_capacity(len),
+        });
+        #[cfg(any(feature = "no_object", feature = "no_index"))]
+        {
+            #[cfg(feature = "no_object")]
+            let err_type = "map";
+            #[cfg(not(feature = "no_object"))]
+            let err_type = "array";
+            Err(Box::new(EvalAltResult::ErrorMismatchOutputType(
+                "Dynamic".into(),
+                err_type.into(),
+                Position::none(),
+            )))
+        }
     }
 
     fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Box<EvalAltResult>> {
@@ -306,10 +338,20 @@ impl Serializer for &mut DynamicSerializer {
         self,
         _name: &'static str,
         _variant_index: u32,
-        _variant: &'static str,
+        variant: &'static str,
         len: usize,
     ) -> Result<Self::SerializeStructVariant, Box<EvalAltResult>> {
-        self.serialize_map(Some(len))
+        #[cfg(not(feature = "no_object"))]
+        return Ok(StructVariantSerializer {
+            variant,
+            map: Map::with_capacity(len),
+        });
+        #[cfg(feature = "no_object")]
+        return Err(Box::new(EvalAltResult::ErrorMismatchOutputType(
+            "Dynamic".into(),
+            "map".into(),
+            Position::none(),
+        )));
     }
 }
 
@@ -395,33 +437,6 @@ impl SerializeTupleStruct for DynamicSerializer {
     }
 }
 
-impl SerializeTupleVariant for DynamicSerializer {
-    type Ok = Dynamic;
-    type Error = Box<EvalAltResult>;
-
-    fn serialize_field<T: ?Sized + Serialize>(
-        &mut self,
-        value: &T,
-    ) -> Result<(), Box<EvalAltResult>> {
-        #[cfg(not(feature = "no_index"))]
-        {
-            let value = value.serialize(&mut *self)?;
-            let arr = self.value.downcast_mut::<Array>().unwrap();
-            arr.push(value);
-            Ok(())
-        }
-        #[cfg(feature = "no_index")]
-        unreachable!()
-    }
-
-    fn end(self) -> Result<Self::Ok, Box<EvalAltResult>> {
-        #[cfg(not(feature = "no_index"))]
-        return Ok(self.value);
-        #[cfg(feature = "no_index")]
-        unreachable!()
-    }
-}
-
 impl SerializeMap for DynamicSerializer {
     type Ok = Dynamic;
     type Error = Box<EvalAltResult>;
@@ -520,7 +535,39 @@ impl SerializeStruct for DynamicSerializer {
     }
 }
 
-impl SerializeStructVariant for DynamicSerializer {
+#[cfg(not(any(feature = "no_object", feature = "no_index")))]
+pub struct TupleVariantSerializer {
+    variant: &'static str,
+    array: Array,
+}
+
+#[cfg(not(any(feature = "no_object", feature = "no_index")))]
+impl SerializeTupleVariant for TupleVariantSerializer {
+    type Ok = Dynamic;
+    type Error = Box<EvalAltResult>;
+
+    fn serialize_field<T: ?Sized + Serialize>(
+        &mut self,
+        value: &T,
+    ) -> Result<(), Box<EvalAltResult>> {
+        let value = to_dynamic(value)?;
+        self.array.push(value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Box<EvalAltResult>> {
+        make_variant(self.variant, self.array.into())
+    }
+}
+
+#[cfg(not(feature = "no_object"))]
+pub struct StructVariantSerializer {
+    variant: &'static str,
+    map: Map,
+}
+
+#[cfg(not(feature = "no_object"))]
+impl SerializeStructVariant for StructVariantSerializer {
     type Ok = Dynamic;
     type Error = Box<EvalAltResult>;
 
@@ -529,21 +576,19 @@ impl SerializeStructVariant for DynamicSerializer {
         key: &'static str,
         value: &T,
     ) -> Result<(), Box<EvalAltResult>> {
-        #[cfg(not(feature = "no_object"))]
+        let value = to_dynamic(value)?;
-        {
+        self.map.insert(key.into(), value);
-            let value = value.serialize(&mut *self)?;
-            let map = self.value.downcast_mut::<Map>().unwrap();
-            map.insert(key.into(), value);
         Ok(())
     }
-        #[cfg(feature = "no_object")]
-        unreachable!()
-    }
 
     fn end(self) -> Result<Self::Ok, Box<EvalAltResult>> {
-        #[cfg(not(feature = "no_object"))]
+        make_variant(self.variant, self.map.into())
-        return Ok(self.value);
-        #[cfg(feature = "no_object")]
-        unreachable!()
     }
 }
+
+#[cfg(not(feature = "no_object"))]
+fn make_variant(variant: &'static str, value: Dynamic) -> Result<Dynamic, Box<EvalAltResult>> {
+    let mut map = Map::with_capacity(1);
+    map.insert(variant.into(), value);
+    Ok(map.into())
+}

tests/serde.rs

@@ -33,6 +33,38 @@ fn test_serde_ser_primary_types() -> Result<(), Box<EvalAltResult>> {
     Ok(())
 }
 
+#[test]
+fn test_serde_ser_integer_types() -> Result<(), Box<EvalAltResult>> {
+    assert_eq!(to_dynamic(42_i8)?.type_name(), std::any::type_name::<INT>());
+    assert_eq!(
+        to_dynamic(42_i16)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+    assert_eq!(
+        to_dynamic(42_i32)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+    assert_eq!(
+        to_dynamic(42_i64)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+    assert_eq!(to_dynamic(42_u8)?.type_name(), std::any::type_name::<INT>());
+    assert_eq!(
+        to_dynamic(42_u16)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+    assert_eq!(
+        to_dynamic(42_u32)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+    assert_eq!(
+        to_dynamic(42_u64)?.type_name(),
+        std::any::type_name::<INT>()
+    );
+
+    Ok(())
+}
+
 #[test]
 #[cfg(not(feature = "no_index"))]
 fn test_serde_ser_array() -> Result<(), Box<EvalAltResult>> {
@@ -85,6 +117,235 @@ fn test_serde_ser_struct() -> Result<(), Box<EvalAltResult>> {
     Ok(())
 }
 
+#[test]
+fn test_serde_ser_unit_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Serialize)]
+    enum MyEnum {
+        VariantFoo,
+        VariantBar,
+    }
+
+    let d = to_dynamic(MyEnum::VariantFoo)?;
+    assert_eq!("VariantFoo", d.as_str().unwrap());
+
+    let d = to_dynamic(MyEnum::VariantBar)?;
+    assert_eq!("VariantBar", d.as_str().unwrap());
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_ser_externally_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Serialize)]
+    enum MyEnum {
+        VariantUnit,
+        #[cfg(not(feature = "no_index"))]
+        VariantUnitTuple(),
+        VariantNewtype(i32),
+        #[cfg(not(feature = "no_index"))]
+        VariantTuple(i32, i32),
+        VariantEmptyStruct {},
+        VariantStruct {
+            a: i32,
+        },
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantUnit)?;
+        assert_eq!("VariantUnit", d.as_str().unwrap());
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let d = to_dynamic(MyEnum::VariantUnitTuple())?;
+        let mut map = d.cast::<Map>();
+        let content = map.remove("VariantUnitTuple").unwrap().cast::<Array>();
+        assert!(map.is_empty());
+        assert!(content.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantNewtype(123))?;
+        let mut map = d.cast::<Map>();
+        let content = map.remove("VariantNewtype").unwrap();
+        assert!(map.is_empty());
+        assert_eq!(Ok(123), content.as_int());
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let d = to_dynamic(MyEnum::VariantTuple(123, 456))?;
+        let mut map = d.cast::<Map>();
+        let content = map.remove("VariantTuple").unwrap().cast::<Array>();
+        assert!(map.is_empty());
+        assert_eq!(2, content.len());
+        assert_eq!(Ok(123), content[0].as_int());
+        assert_eq!(Ok(456), content[1].as_int());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantEmptyStruct {})?;
+        let mut map = d.cast::<Map>();
+        let map_inner = map.remove("VariantEmptyStruct").unwrap().cast::<Map>();
+        assert!(map.is_empty());
+        assert!(map_inner.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantStruct { a: 123 })?;
+        let mut map = d.cast::<Map>();
+        let mut map_inner = map.remove("VariantStruct").unwrap().cast::<Map>();
+        assert!(map.is_empty());
+        assert_eq!(Ok(123), map_inner.remove("a").unwrap().as_int());
+        assert!(map_inner.is_empty());
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_ser_internally_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Serialize)]
+    #[serde(tag = "tag")]
+    enum MyEnum {
+        VariantEmptyStruct {},
+        VariantStruct { a: i32 },
+    }
+
+    let d = to_dynamic(MyEnum::VariantEmptyStruct {})?;
+    let mut map = d.cast::<Map>();
+    assert_eq!(
+        Ok("VariantEmptyStruct"),
+        map.remove("tag").unwrap().as_str()
+    );
+    assert!(map.is_empty());
+
+    let d = to_dynamic(MyEnum::VariantStruct { a: 123 })?;
+    let mut map = d.cast::<Map>();
+    assert_eq!(Ok("VariantStruct"), map.remove("tag").unwrap().as_str());
+    assert_eq!(Ok(123), map.remove("a").unwrap().as_int());
+    assert!(map.is_empty());
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_ser_adjacently_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Serialize)]
+    #[serde(tag = "tag", content = "content")]
+    enum MyEnum {
+        VariantUnit,
+        #[cfg(not(feature = "no_index"))]
+        VariantUnitTuple(),
+        VariantNewtype(i32),
+        #[cfg(not(feature = "no_index"))]
+        VariantTuple(i32, i32),
+        VariantEmptyStruct {},
+        VariantStruct {
+            a: i32,
+        },
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantUnit)?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok("VariantUnit"), map.remove("tag").unwrap().as_str());
+        assert!(map.is_empty());
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let d = to_dynamic(MyEnum::VariantUnitTuple())?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok("VariantUnitTuple"), map.remove("tag").unwrap().as_str());
+        let content = map.remove("content").unwrap().cast::<Array>();
+        assert!(map.is_empty());
+        assert!(content.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantNewtype(123))?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok("VariantNewtype"), map.remove("tag").unwrap().as_str());
+        let content = map.remove("content").unwrap();
+        assert!(map.is_empty());
+        assert_eq!(Ok(123), content.as_int());
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let d = to_dynamic(MyEnum::VariantTuple(123, 456))?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok("VariantTuple"), map.remove("tag").unwrap().as_str());
+        let content = map.remove("content").unwrap().cast::<Array>();
+        assert!(map.is_empty());
+        assert_eq!(2, content.len());
+        assert_eq!(Ok(123), content[0].as_int());
+        assert_eq!(Ok(456), content[1].as_int());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantEmptyStruct {})?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(
+            Ok("VariantEmptyStruct"),
+            map.remove("tag").unwrap().as_str()
+        );
+        let map_inner = map.remove("content").unwrap().cast::<Map>();
+        assert!(map.is_empty());
+        assert!(map_inner.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantStruct { a: 123 })?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok("VariantStruct"), map.remove("tag").unwrap().as_str());
+        let mut map_inner = map.remove("content").unwrap().cast::<Map>();
+        assert!(map.is_empty());
+        assert_eq!(Ok(123), map_inner.remove("a").unwrap().as_int());
+        assert!(map_inner.is_empty());
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_ser_untagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Serialize)]
+    #[serde(untagged)]
+    enum MyEnum {
+        VariantEmptyStruct {},
+        VariantStruct1 { a: i32 },
+        VariantStruct2 { b: i32 },
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantEmptyStruct {})?;
+        let map = d.cast::<Map>();
+        assert!(map.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantStruct1 { a: 123 })?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok(123), map.remove("a").unwrap().as_int());
+        assert!(map.is_empty());
+    }
+
+    {
+        let d = to_dynamic(MyEnum::VariantStruct2 { b: 123 })?;
+        let mut map = d.cast::<Map>();
+        assert_eq!(Ok(123), map.remove("b").unwrap().as_int());
+        assert!(map.is_empty());
+    }
+
+    Ok(())
+}
+
 #[test]
 fn test_serde_de_primary_types() -> Result<(), Box<EvalAltResult>> {
     assert_eq!(42_u16, from_dynamic(&Dynamic::from(42_u16))?);
@@ -106,6 +367,20 @@ fn test_serde_de_primary_types() -> Result<(), Box<EvalAltResult>> {
     Ok(())
 }
 
+#[test]
+fn test_serde_de_integer_types() -> Result<(), Box<EvalAltResult>> {
+    assert_eq!(42_i8, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_i16, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_i32, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_i64, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_u8, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_u16, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_u32, from_dynamic(&Dynamic::from(42 as INT))?);
+    assert_eq!(42_u64, from_dynamic(&Dynamic::from(42 as INT))?);
+
+    Ok(())
+}
+
 #[test]
 #[cfg(not(feature = "no_index"))]
 fn test_serde_de_array() -> Result<(), Box<EvalAltResult>> {
@@ -190,3 +465,261 @@ fn test_serde_de_script() -> Result<(), Box<EvalAltResult>> {
 
     Ok(())
 }
+
+#[test]
+fn test_serde_de_unit_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Debug, PartialEq, Deserialize)]
+    enum MyEnum {
+        VariantFoo,
+        VariantBar,
+    }
+
+    {
+        let d = Dynamic::from("VariantFoo".to_string());
+        assert_eq!(MyEnum::VariantFoo, from_dynamic(&d)?);
+    }
+
+    {
+        let d = Dynamic::from("VariantBar".to_string());
+        assert_eq!(MyEnum::VariantBar, from_dynamic(&d)?);
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_de_externally_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(deny_unknown_fields)]
+    enum MyEnum {
+        VariantUnit,
+        #[cfg(not(feature = "no_index"))]
+        VariantUnitTuple(),
+        VariantNewtype(i32),
+        #[cfg(not(feature = "no_index"))]
+        VariantTuple(i32, i32),
+        VariantEmptyStruct {},
+        VariantStruct {
+            a: i32,
+        },
+    }
+
+    {
+        let d = Dynamic::from("VariantUnit".to_string());
+        assert_eq!(MyEnum::VariantUnit, from_dynamic(&d).unwrap());
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let array: Array = vec![];
+        let mut map_outer = Map::new();
+        map_outer.insert("VariantUnitTuple".into(), array.into());
+        assert_eq!(
+            MyEnum::VariantUnitTuple(),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map_outer = Map::new();
+        map_outer.insert("VariantNewtype".into(), (123 as INT).into());
+        assert_eq!(
+            MyEnum::VariantNewtype(123),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let array: Array = vec![(123 as INT).into(), (456 as INT).into()];
+        let mut map_outer = Map::new();
+        map_outer.insert("VariantTuple".into(), array.into());
+        assert_eq!(
+            MyEnum::VariantTuple(123, 456),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let map_inner = Map::new();
+        let mut map_outer = Map::new();
+        map_outer.insert("VariantEmptyStruct".into(), map_inner.into());
+        assert_eq!(
+            MyEnum::VariantEmptyStruct {},
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map_inner = Map::new();
+        map_inner.insert("a".into(), (123 as INT).into());
+        let mut map_outer = Map::new();
+        map_outer.insert("VariantStruct".into(), map_inner.into());
+        assert_eq!(
+            MyEnum::VariantStruct { a: 123 },
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_de_internally_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(tag = "tag", deny_unknown_fields)]
+    enum MyEnum {
+        VariantEmptyStruct {},
+        VariantStruct { a: i32 },
+    }
+
+    {
+        let mut map = Map::new();
+        map.insert("tag".into(), "VariantStruct".into());
+        map.insert("a".into(), (123 as INT).into());
+        assert_eq!(
+            MyEnum::VariantStruct { a: 123 },
+            from_dynamic(&map.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map = Map::new();
+        map.insert("tag".into(), "VariantEmptyStruct".into());
+        assert_eq!(
+            MyEnum::VariantEmptyStruct {},
+            from_dynamic(&map.into()).unwrap()
+        );
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_de_adjacently_tagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(tag = "tag", content = "content", deny_unknown_fields)]
+    enum MyEnum {
+        VariantUnit,
+        #[cfg(not(feature = "no_index"))]
+        VariantUnitTuple(),
+        VariantNewtype(i32),
+        #[cfg(not(feature = "no_index"))]
+        VariantTuple(i32, i32),
+        VariantEmptyStruct {},
+        VariantStruct {
+            a: i32,
+        },
+    }
+
+    {
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantUnit".into());
+        assert_eq!(
+            MyEnum::VariantUnit,
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let array: Array = vec![];
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantUnitTuple".into());
+        map_outer.insert("content".into(), array.into());
+        assert_eq!(
+            MyEnum::VariantUnitTuple(),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantNewtype".into());
+        map_outer.insert("content".into(), (123 as INT).into());
+        assert_eq!(
+            MyEnum::VariantNewtype(123),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    #[cfg(not(feature = "no_index"))]
+    {
+        let array: Array = vec![(123 as INT).into(), (456 as INT).into()];
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantTuple".into());
+        map_outer.insert("content".into(), array.into());
+        assert_eq!(
+            MyEnum::VariantTuple(123, 456),
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let map_inner = Map::new();
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantEmptyStruct".into());
+        map_outer.insert("content".into(), map_inner.into());
+        assert_eq!(
+            MyEnum::VariantEmptyStruct {},
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map_inner = Map::new();
+        map_inner.insert("a".into(), (123 as INT).into());
+        let mut map_outer = Map::new();
+        map_outer.insert("tag".into(), "VariantStruct".into());
+        map_outer.insert("content".into(), map_inner.into());
+        assert_eq!(
+            MyEnum::VariantStruct { a: 123 },
+            from_dynamic(&map_outer.into()).unwrap()
+        );
+    }
+
+    Ok(())
+}
+
+#[test]
+#[cfg(not(feature = "no_object"))]
+fn test_serde_de_untagged_enum() -> Result<(), Box<EvalAltResult>> {
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(untagged, deny_unknown_fields)]
+    enum MyEnum {
+        VariantEmptyStruct {},
+        VariantStruct1 { a: i32 },
+        VariantStruct2 { b: i32 },
+    }
+
+    {
+        let map = Map::new();
+        assert_eq!(
+            MyEnum::VariantEmptyStruct {},
+            from_dynamic(&map.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map = Map::new();
+        map.insert("a".into(), (123 as INT).into());
+        assert_eq!(
+            MyEnum::VariantStruct1 { a: 123 },
+            from_dynamic(&map.into()).unwrap()
+        );
+    }
+
+    {
+        let mut map = Map::new();
+        map.insert("b".into(), (123 as INT).into());
+        assert_eq!(
+            MyEnum::VariantStruct2 { b: 123 },
+            from_dynamic(&map.into()).unwrap()
+        );
+    }
+
+    Ok(())
+}