Adding upstream version 0.70.1+ds1.upstream/0.70.1+ds1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 1427 insertions, 0 deletions

diff --git a/vendor/serde-value/.cargo-checksum.json b/vendor/serde-value/.cargo-checksum.json
new file mode 100644
index 0000000..9def02f
--- /dev/null
+++ b/vendor/serde-value/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{},"package":"f3a1a3341211875ef120e117ea7fd5228530ae7e7036a779fdc9117be6b3282c"}
\ No newline at end of file
diff --git a/vendor/serde-value/COPYING b/vendor/serde-value/COPYING
new file mode 100644
index 0000000..fe07e24
--- /dev/null
+++ b/vendor/serde-value/COPYING
@@ -0,0 +1,19 @@
+Copyright (c) 2016 arcnmx
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/serde-value/Cargo.toml b/vendor/serde-value/Cargo.toml
new file mode 100644
index 0000000..b0f9729
--- /dev/null
+++ b/vendor/serde-value/Cargo.toml
@@ -0,0 +1,30 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "serde-value"
+version = "0.7.0"
+authors = ["arcnmx"]
+description = "Serialization value trees"
+documentation = "https://docs.rs/serde-value/*/serde_value/"
+readme = "README.md"
+keywords = ["serde"]
+license = "MIT"
+repository = "https://github.com/arcnmx/serde-value"
+[dependencies.ordered-float]
+version = "^2.0.0"
+
+[dependencies.serde]
+version = "^1.0.0"
+[dev-dependencies.serde_derive]
+version = "^1.0.0"
diff --git a/vendor/serde-value/README.md b/vendor/serde-value/README.md
new file mode 100644
index 0000000..a1ee635
--- /dev/null
+++ b/vendor/serde-value/README.md
@@ -0,0 +1,14 @@
+# serde-value
+
+[![travis-badge][]][travis] [![release-badge][]][cargo] [![docs-badge][]][docs] [![license-badge][]][license]
+
+`serde-value` provides a way to capture serialization value trees for later processing.
+
+[travis-badge]: https://img.shields.io/travis/arcnmx/serde-value/master.svg?style=flat-square
+[travis]: https://travis-ci.org/arcnmx/serde-value
+[release-badge]: https://img.shields.io/crates/v/serde-value.svg?style=flat-square
+[cargo]: https://crates.io/crates/serde-value
+[docs-badge]: https://img.shields.io/badge/API-docs-blue.svg?style=flat-square
+[docs]: https://docs.rs/serde-value/*/serde_value/
+[license-badge]: https://img.shields.io/badge/license-MIT-lightgray.svg?style=flat-square
+[license]: https://github.com/arcnmx/serde-value/blob/master/COPYING
diff --git a/vendor/serde-value/src/de.rs b/vendor/serde-value/src/de.rs
new file mode 100644
index 0000000..97dc115
--- /dev/null
+++ b/vendor/serde-value/src/de.rs
@@ -0,0 +1,541 @@
+use serde::{forward_to_deserialize_any, de};
+use std::collections::BTreeMap;
+use std::error::Error;
+use std::fmt;
+use std::marker::PhantomData;
+
+use crate::Value;
+
+#[derive(Debug)]
+pub enum Unexpected {
+    Bool(bool),
+    Unsigned(u64),
+    Signed(i64),
+    Float(f64),
+    Char(char),
+    Str(String),
+    Bytes(Vec<u8>),
+    Unit,
+    Option,
+    NewtypeStruct,
+    Seq,
+    Map,
+    Enum,
+    UnitVariant,
+    NewtypeVariant,
+    TupleVariant,
+    StructVariant,
+    Other(String),
+}
+
+impl<'a> From<de::Unexpected<'a>> for Unexpected {
+    fn from(unexp: de::Unexpected) -> Unexpected {
+        match unexp {
+            de::Unexpected::Bool(v) => Unexpected::Bool(v),
+            de::Unexpected::Unsigned(v) => Unexpected::Unsigned(v),
+            de::Unexpected::Signed(v) => Unexpected::Signed(v),
+            de::Unexpected::Float(v) => Unexpected::Float(v),
+            de::Unexpected::Char(v) => Unexpected::Char(v),
+            de::Unexpected::Str(v) => Unexpected::Str(v.to_owned()),
+            de::Unexpected::Bytes(v) => Unexpected::Bytes(v.to_owned()),
+            de::Unexpected::Unit => Unexpected::Unit,
+            de::Unexpected::Option => Unexpected::Option,
+            de::Unexpected::NewtypeStruct => Unexpected::NewtypeStruct,
+            de::Unexpected::Seq => Unexpected::Seq,
+            de::Unexpected::Map => Unexpected::Map,
+            de::Unexpected::Enum => Unexpected::Enum,
+            de::Unexpected::UnitVariant => Unexpected::UnitVariant,
+            de::Unexpected::NewtypeVariant => Unexpected::NewtypeVariant,
+            de::Unexpected::TupleVariant => Unexpected::TupleVariant,
+            de::Unexpected::StructVariant => Unexpected::StructVariant,
+            de::Unexpected::Other(v) => Unexpected::Other(v.to_owned()),
+        }
+    }
+}
+
+impl Unexpected {
+    pub fn to_unexpected<'a>(&'a self) -> de::Unexpected<'a> {
+        match *self {
+            Unexpected::Bool(v) => de::Unexpected::Bool(v),
+            Unexpected::Unsigned(v) => de::Unexpected::Unsigned(v),
+            Unexpected::Signed(v) => de::Unexpected::Signed(v),
+            Unexpected::Float(v) => de::Unexpected::Float(v),
+            Unexpected::Char(v) => de::Unexpected::Char(v),
+            Unexpected::Str(ref v) => de::Unexpected::Str(v),
+            Unexpected::Bytes(ref v) => de::Unexpected::Bytes(v),
+            Unexpected::Unit => de::Unexpected::Unit,
+            Unexpected::Option => de::Unexpected::Option,
+            Unexpected::NewtypeStruct => de::Unexpected::NewtypeStruct,
+            Unexpected::Seq => de::Unexpected::Seq,
+            Unexpected::Map => de::Unexpected::Map,
+            Unexpected::Enum => de::Unexpected::Enum,
+            Unexpected::UnitVariant => de::Unexpected::UnitVariant,
+            Unexpected::NewtypeVariant => de::Unexpected::NewtypeVariant,
+            Unexpected::TupleVariant => de::Unexpected::TupleVariant,
+            Unexpected::StructVariant => de::Unexpected::StructVariant,
+            Unexpected::Other(ref v) => de::Unexpected::Other(v),
+        }
+    }
+
+}
+
+#[derive(Debug)]
+pub enum DeserializerError {
+    Custom(String),
+    InvalidType(Unexpected, String),
+    InvalidValue(Unexpected, String),
+    InvalidLength(usize, String),
+    UnknownVariant(String, &'static [&'static str]),
+    UnknownField(String, &'static [&'static str]),
+    MissingField(&'static str),
+    DuplicateField(&'static str),
+}
+
+impl de::Error for DeserializerError {
+    fn custom<T: fmt::Display>(msg: T) -> Self {
+        DeserializerError::Custom(msg.to_string())
+    }
+
+    fn invalid_type(unexp: de::Unexpected, exp: &dyn de::Expected) -> Self {
+        DeserializerError::InvalidType(unexp.into(), exp.to_string())
+    }
+
+    fn invalid_value(unexp: de::Unexpected, exp: &dyn de::Expected) -> Self {
+        DeserializerError::InvalidValue(unexp.into(), exp.to_string())
+    }
+
+    fn invalid_length(len: usize, exp: &dyn de::Expected) -> Self {
+        DeserializerError::InvalidLength(len, exp.to_string())
+    }
+
+    fn unknown_variant(field: &str, expected: &'static [&'static str]) -> Self {
+        DeserializerError::UnknownVariant(field.into(), expected)
+    }
+
+    fn unknown_field(field: &str, expected: &'static [&'static str]) -> Self {
+        DeserializerError::UnknownField(field.into(), expected)
+    }
+
+    fn missing_field(field: &'static str) -> Self {
+        DeserializerError::MissingField(field)
+    }
+
+    fn duplicate_field(field: &'static str) -> Self {
+        DeserializerError::DuplicateField(field)
+    }
+}
+
+impl DeserializerError {
+    pub fn to_error<E: de::Error>(&self) -> E {
+        match *self {
+            DeserializerError::Custom(ref msg) => E::custom(msg.clone()),
+            DeserializerError::InvalidType(ref unexp, ref exp) => {
+                E::invalid_type(unexp.to_unexpected(), &&**exp)
+            }
+            DeserializerError::InvalidValue(ref unexp, ref exp) => {
+                E::invalid_value(unexp.to_unexpected(), &&**exp)
+            }
+            DeserializerError::InvalidLength(len, ref exp) => E::invalid_length(len, &&**exp),
+            DeserializerError::UnknownVariant(ref field, exp) => E::unknown_variant(field, exp),
+            DeserializerError::UnknownField(ref field, exp) => E::unknown_field(field, exp),
+            DeserializerError::MissingField(field) => E::missing_field(field),
+            DeserializerError::DuplicateField(field) => E::missing_field(field),
+        }
+    }
+
+    pub fn into_error<E: de::Error>(self) -> E {
+        self.to_error()
+    }
+}
+
+impl Error for DeserializerError {
+    fn description(&self) -> &str {
+        "Value deserializer error"
+    }
+}
+
+impl fmt::Display for DeserializerError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            DeserializerError::Custom(ref msg) => write!(f, "{}", msg),
+            DeserializerError::InvalidType(ref unexp, ref exp) => {
+                write!(f, "Invalid type {}. Expected {}", unexp.to_unexpected(), exp)
+            }
+            DeserializerError::InvalidValue(ref unexp, ref exp) => {
+                write!(f, "Invalid value {}. Expected {}", unexp.to_unexpected(), exp)
+            }
+            DeserializerError::InvalidLength(len, ref exp) => {
+                write!(f, "Invalid length {}. Expected {}", len, exp)
+            }
+            DeserializerError::UnknownVariant(ref field, exp) => {
+                write!(f, "Unknown variant {}. Expected one of {}", field, exp.join(", "))
+            },
+            DeserializerError::UnknownField(ref field, exp) => {
+                write!(f, "Unknown field {}. Expected one of {}", field, exp.join(", "))
+            }
+            DeserializerError::MissingField(field) => write!(f, "Missing field {}", field),
+            DeserializerError::DuplicateField(field) => write!(f, "Duplicate field {}", field),
+        }
+    }
+}
+
+impl From<de::value::Error> for DeserializerError {
+    fn from(e: de::value::Error) -> DeserializerError {
+        DeserializerError::Custom(e.to_string())
+    }
+}
+
+pub struct ValueVisitor;
+
+impl<'de> de::Visitor<'de> for ValueVisitor {
+    type Value = Value;
+
+    fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        fmt.write_str("any value")
+    }
+
+    fn visit_bool<E>(self, value: bool) -> Result<Value, E> {
+        Ok(Value::Bool(value))
+    }
+
+    fn visit_i8<E>(self, value: i8) -> Result<Value, E> {
+        Ok(Value::I8(value))
+    }
+
+    fn visit_i16<E>(self, value: i16) -> Result<Value, E> {
+        Ok(Value::I16(value))
+    }
+
+    fn visit_i32<E>(self, value: i32) -> Result<Value, E> {
+        Ok(Value::I32(value))
+    }
+
+    fn visit_i64<E>(self, value: i64) -> Result<Value, E> {
+        Ok(Value::I64(value))
+    }
+
+    fn visit_u8<E>(self, value: u8) -> Result<Value, E> {
+        Ok(Value::U8(value))
+    }
+
+    fn visit_u16<E>(self, value: u16) -> Result<Value, E> {
+        Ok(Value::U16(value))
+    }
+
+    fn visit_u32<E>(self, value: u32) -> Result<Value, E> {
+        Ok(Value::U32(value))
+    }
+
+    fn visit_u64<E>(self, value: u64) -> Result<Value, E> {
+        Ok(Value::U64(value))
+    }
+
+    fn visit_f32<E>(self, value: f32) -> Result<Value, E> {
+        Ok(Value::F32(value))
+    }
+
+    fn visit_f64<E>(self, value: f64) -> Result<Value, E> {
+        Ok(Value::F64(value))
+    }
+
+    fn visit_char<E>(self, value: char) -> Result<Value, E> {
+        Ok(Value::Char(value))
+    }
+
+    fn visit_str<E>(self, value: &str) -> Result<Value, E> {
+        Ok(Value::String(value.into()))
+    }
+
+    fn visit_string<E>(self, value: String) -> Result<Value, E> {
+        Ok(Value::String(value))
+    }
+
+    fn visit_unit<E>(self) -> Result<Value, E> {
+        Ok(Value::Unit)
+    }
+
+    fn visit_none<E>(self) -> Result<Value, E> {
+        Ok(Value::Option(None))
+    }
+
+    fn visit_some<D: de::Deserializer<'de>>(self, d: D) -> Result<Value, D::Error> {
+        d.deserialize_any(ValueVisitor).map(|v| Value::Option(Some(Box::new(v))))
+    }
+
+    fn visit_newtype_struct<D: de::Deserializer<'de>>(self, d: D) -> Result<Value, D::Error> {
+        d.deserialize_any(ValueVisitor).map(|v| Value::Newtype(Box::new(v)))
+    }
+
+    fn visit_seq<V: de::SeqAccess<'de>>(self, mut visitor: V) -> Result<Value, V::Error> {
+        let mut values = Vec::new();
+        while let Some(elem) = visitor.next_element()? {
+            values.push(elem);
+        }
+        Ok(Value::Seq(values))
+    }
+
+    fn visit_map<V: de::MapAccess<'de>>(self, mut visitor: V) -> Result<Value, V::Error> {
+        let mut values = BTreeMap::new();
+        while let Some((key, value)) = visitor.next_entry()? {
+            values.insert(key, value);
+        }
+        Ok(Value::Map(values))
+    }
+
+    fn visit_bytes<E>(self, v: &[u8]) -> Result<Value, E> {
+        Ok(Value::Bytes(v.into()))
+    }
+
+    fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Value, E> {
+        Ok(Value::Bytes(v))
+    }
+}
+
+impl<'de> de::Deserialize<'de> for Value {
+    fn deserialize<D: de::Deserializer<'de>>(d: D) -> Result<Self, D::Error> {
+        d.deserialize_any(ValueVisitor)
+    }
+}
+
+impl<'de> de::IntoDeserializer<'de, DeserializerError> for Value {
+    type Deserializer = Value;
+
+    fn into_deserializer(self) -> Value {
+        self
+    }
+}
+
+pub struct ValueDeserializer<E> {
+    value: Value,
+    error: PhantomData<fn() -> E>,
+}
+
+impl<E> ValueDeserializer<E> {
+    pub fn new(value: Value) -> Self {
+        ValueDeserializer {
+            value: value,
+            error: Default::default(),
+        }
+    }
+
+    pub fn into_value(self) -> Value {
+        self.value
+    }
+}
+
+impl<'de, E> de::Deserializer<'de> for ValueDeserializer<E> where E: de::Error {
+    type Error = E;
+
+    fn deserialize_any<V: de::Visitor<'de>>(self, visitor: V) -> Result<V::Value, Self::Error> {
+        match self.value {
+            Value::Bool(v) => visitor.visit_bool(v),
+            Value::U8(v) => visitor.visit_u8(v),
+            Value::U16(v) => visitor.visit_u16(v),
+            Value::U32(v) => visitor.visit_u32(v),
+            Value::U64(v) => visitor.visit_u64(v),
+            Value::I8(v) => visitor.visit_i8(v),
+            Value::I16(v) => visitor.visit_i16(v),
+            Value::I32(v) => visitor.visit_i32(v),
+            Value::I64(v) => visitor.visit_i64(v),
+            Value::F32(v) => visitor.visit_f32(v),
+            Value::F64(v) => visitor.visit_f64(v),
+            Value::Char(v) => visitor.visit_char(v),
+            Value::String(v) => visitor.visit_string(v),
+            Value::Unit => visitor.visit_unit(),
+            Value::Option(None) => visitor.visit_none(),
+            Value::Option(Some(v)) => visitor.visit_some(ValueDeserializer::new(*v)),
+            Value::Newtype(v) => visitor.visit_newtype_struct(ValueDeserializer::new(*v)),
+            Value::Seq(v) => {
+                visitor.visit_seq(de::value::SeqDeserializer::new(v.into_iter().map(ValueDeserializer::new)))
+            },
+            Value::Map(v) => {
+                visitor.visit_map(de::value::MapDeserializer::new(v.into_iter().map(|(k, v)| (
+                    ValueDeserializer::new(k),
+                    ValueDeserializer::new(v),
+                ))))
+            },
+            Value::Bytes(v) => visitor.visit_byte_buf(v),
+        }
+    }
+
+    fn deserialize_option<V: de::Visitor<'de>>(self, visitor: V) -> Result<V::Value, Self::Error> {
+        match self.value {
+            Value::Option(..) => self.deserialize_any(visitor),
+            Value::Unit => visitor.visit_unit(),
+            _ => visitor.visit_some(self)
+        }
+    }
+
+    fn deserialize_enum<V: de::Visitor<'de>>(self,
+                                             _name: &'static str,
+                                             _variants: &'static [&'static str],
+                                             visitor: V)
+                                             -> Result<V::Value, Self::Error> {
+        let (variant, value) = match self.value {
+            Value::Map(value) => {
+                let mut iter = value.into_iter();
+                let (variant, value) = match iter.next() {
+                    Some(v) => v,
+                    None => {
+                        return Err(de::Error::invalid_value(de::Unexpected::Map,
+                                                            &"map with a single key"));
+                    }
+                };
+                // enums are encoded as maps with a single key:value pair
+                if iter.next().is_some() {
+                    return Err(de::Error::invalid_value(de::Unexpected::Map,
+                                                        &"map with a single key"));
+                }
+                (variant, Some(value))
+            }
+            Value::String(variant) => (Value::String(variant), None),
+            other => {
+                return Err(de::Error::invalid_type(other.unexpected(), &"string or map"));
+            }
+        };
+
+        let d = EnumDeserializer {
+            variant: variant,
+            value: value,
+            error: Default::default(),
+        };
+        visitor.visit_enum(d)
+    }
+
+    fn deserialize_newtype_struct<V: de::Visitor<'de>>(self,
+                                                       _name: &'static str,
+                                                       visitor: V)
+                                                       -> Result<V::Value, Self::Error> {
+        match self.value {
+            Value::Newtype(v) => visitor.visit_newtype_struct(ValueDeserializer::new(*v)),
+            _ => visitor.visit_newtype_struct(self),
+        }
+    }
+
+    forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit
+        seq bytes byte_buf map unit_struct
+        tuple_struct struct tuple ignored_any identifier
+    }
+}
+
+impl<'de, E> de::IntoDeserializer<'de, E> for ValueDeserializer<E> where E: de::Error {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> de::Deserializer<'de> for Value {
+    type Error = DeserializerError;
+
+    fn deserialize_any<V: de::Visitor<'de>>(self, visitor: V) -> Result<V::Value, Self::Error> {
+        ValueDeserializer::new(self).deserialize_any(visitor)
+    }
+
+    fn deserialize_option<V: de::Visitor<'de>>(self, visitor: V) -> Result<V::Value, Self::Error> {
+        ValueDeserializer::new(self).deserialize_option(visitor)
+    }
+
+    fn deserialize_enum<V: de::Visitor<'de>>(self,
+                                             name: &'static str,
+                                             variants: &'static [&'static str],
+                                             visitor: V)
+                                             -> Result<V::Value, Self::Error> {
+        ValueDeserializer::new(self).deserialize_enum(name, variants, visitor)
+    }
+
+    fn deserialize_newtype_struct<V: de::Visitor<'de>>(self,
+                                                       name: &'static str,
+                                                       visitor: V)
+                                                       -> Result<V::Value, Self::Error> {
+        ValueDeserializer::new(self).deserialize_newtype_struct(name, visitor)
+    }
+
+    forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string unit
+        seq bytes byte_buf map unit_struct
+        tuple_struct struct tuple ignored_any identifier
+    }
+}
+
+struct EnumDeserializer<E> {
+    variant: Value,
+    value: Option<Value>,
+    error: PhantomData<fn() -> E>,
+}
+
+impl<'de, E> de::EnumAccess<'de> for EnumDeserializer<E> where E: de::Error {
+    type Error = E;
+    type Variant = VariantDeserializer<Self::Error>;
+
+    fn variant_seed<V>(self, seed: V) -> Result<(V::Value, VariantDeserializer<Self::Error>), Self::Error>
+        where V: de::DeserializeSeed<'de>
+    {
+        let visitor = VariantDeserializer {
+            value: self.value,
+            error: Default::default(),
+        };
+        seed.deserialize(ValueDeserializer::new(self.variant)).map(|v| (v, visitor))
+    }
+}
+
+struct VariantDeserializer<E> {
+    value: Option<Value>,
+    error: PhantomData<fn() -> E>,
+}
+
+impl<'de, E> de::VariantAccess<'de> for VariantDeserializer<E> where E: de::Error {
+    type Error = E;
+
+    fn unit_variant(self) -> Result<(), Self::Error> {
+        match self.value {
+            Some(value) => de::Deserialize::deserialize(ValueDeserializer::new(value)),
+            None => Ok(()),
+        }
+    }
+
+    fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
+        where T: de::DeserializeSeed<'de>
+    {
+        match self.value {
+            Some(value) => seed.deserialize(ValueDeserializer::new(value)),
+            None => Err(de::Error::invalid_type(de::Unexpected::UnitVariant, &"newtype variant")),
+        }
+    }
+
+    fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error>
+        where V: de::Visitor<'de>
+    {
+        match self.value {
+            Some(Value::Seq(v)) => {
+                de::Deserializer::deserialize_any(
+                    de::value::SeqDeserializer::new(v.into_iter().map(ValueDeserializer::new)),
+                    visitor)
+            }
+            Some(other) => Err(de::Error::invalid_type(other.unexpected(), &"tuple variant")),
+            None => Err(de::Error::invalid_type(de::Unexpected::UnitVariant, &"tuple variant")),
+        }
+    }
+
+    fn struct_variant<V>(self,
+                       _fields: &'static [&'static str],
+                       visitor: V)
+                       -> Result<V::Value, Self::Error>
+        where V: de::Visitor<'de>
+    {
+        match self.value {
+            Some(Value::Map(v)) => {
+                de::Deserializer::deserialize_any(
+                    de::value::MapDeserializer::new(v.into_iter().map(|(k, v)| (
+                        ValueDeserializer::new(k),
+                        ValueDeserializer::new(v),
+                    ))),
+                    visitor)
+            }
+            Some(other) => Err(de::Error::invalid_type(other.unexpected(), &"struct variant")),
+            None => Err(de::Error::invalid_type(de::Unexpected::UnitVariant, &"struct variant")),
+        }
+    }
+}
diff --git a/vendor/serde-value/src/lib.rs b/vendor/serde-value/src/lib.rs
new file mode 100644
index 0000000..7f2544b
--- /dev/null
+++ b/vendor/serde-value/src/lib.rs
@@ -0,0 +1,384 @@
+#![doc(html_root_url="https://docs.rs/serde-value/0.7.0/")]
+
+use std::collections::BTreeMap;
+use std::cmp::Ordering;
+use std::hash::{Hash, Hasher};
+use serde::Deserialize;
+use ordered_float::OrderedFloat;
+
+pub use de::*;
+pub use ser::*;
+
+mod de;
+mod ser;
+
+#[derive(Clone, Debug)]
+pub enum Value {
+    Bool(bool),
+
+    U8(u8),
+    U16(u16),
+    U32(u32),
+    U64(u64),
+
+    I8(i8),
+    I16(i16),
+    I32(i32),
+    I64(i64),
+
+    F32(f32),
+    F64(f64),
+
+    Char(char),
+    String(String),
+
+    Unit,
+    Option(Option<Box<Value>>),
+    Newtype(Box<Value>),
+    Seq(Vec<Value>),
+    Map(BTreeMap<Value, Value>),
+    Bytes(Vec<u8>),
+}
+
+impl Hash for Value {
+    fn hash<H>(&self, hasher: &mut H)
+    where
+        H: Hasher
+    {
+        self.discriminant().hash(hasher);
+        match *self {
+            Value::Bool(v) => v.hash(hasher),
+            Value::U8(v) => v.hash(hasher),
+            Value::U16(v) => v.hash(hasher),
+            Value::U32(v) => v.hash(hasher),
+            Value::U64(v) => v.hash(hasher),
+            Value::I8(v) => v.hash(hasher),
+            Value::I16(v) => v.hash(hasher),
+            Value::I32(v) => v.hash(hasher),
+            Value::I64(v) => v.hash(hasher),
+            Value::F32(v) => OrderedFloat(v).hash(hasher),
+            Value::F64(v) => OrderedFloat(v).hash(hasher),
+            Value::Char(v) => v.hash(hasher),
+            Value::String(ref v) => v.hash(hasher),
+            Value::Unit => ().hash(hasher),
+            Value::Option(ref v) => v.hash(hasher),
+            Value::Newtype(ref v) => v.hash(hasher),
+            Value::Seq(ref v) => v.hash(hasher),
+            Value::Map(ref v) => v.hash(hasher),
+            Value::Bytes(ref v) => v.hash(hasher),
+        }
+    }
+}
+
+impl PartialEq for Value {
+    fn eq(&self, rhs: &Self) -> bool {
+        match (self, rhs) {
+            (&Value::Bool(v0), &Value::Bool(v1)) if v0 == v1 => true,
+            (&Value::U8(v0), &Value::U8(v1)) if v0 == v1 => true,
+            (&Value::U16(v0), &Value::U16(v1)) if v0 == v1 => true,
+            (&Value::U32(v0), &Value::U32(v1)) if v0 == v1 => true,
+            (&Value::U64(v0), &Value::U64(v1)) if v0 == v1 => true,
+            (&Value::I8(v0), &Value::I8(v1)) if v0 == v1 => true,
+            (&Value::I16(v0), &Value::I16(v1)) if v0 == v1 => true,
+            (&Value::I32(v0), &Value::I32(v1)) if v0 == v1 => true,
+            (&Value::I64(v0), &Value::I64(v1)) if v0 == v1 => true,
+            (&Value::F32(v0), &Value::F32(v1)) if OrderedFloat(v0) == OrderedFloat(v1) => true,
+            (&Value::F64(v0), &Value::F64(v1)) if OrderedFloat(v0) == OrderedFloat(v1) => true,
+            (&Value::Char(v0), &Value::Char(v1)) if v0 == v1 => true,
+            (&Value::String(ref v0), &Value::String(ref v1)) if v0 == v1 => true,
+            (&Value::Unit, &Value::Unit) => true,
+            (&Value::Option(ref v0), &Value::Option(ref v1)) if v0 == v1 => true,
+            (&Value::Newtype(ref v0), &Value::Newtype(ref v1)) if v0 == v1 => true,
+            (&Value::Seq(ref v0), &Value::Seq(ref v1)) if v0 == v1 => true,
+            (&Value::Map(ref v0), &Value::Map(ref v1)) if v0 == v1 => true,
+            (&Value::Bytes(ref v0), &Value::Bytes(ref v1)) if v0 == v1 => true,
+            _ => false,
+        }
+    }
+}
+
+impl Ord for Value {
+    fn cmp(&self, rhs: &Self) -> Ordering {
+        match (self, rhs) {
+            (&Value::Bool(v0), &Value::Bool(ref v1)) => v0.cmp(v1),
+            (&Value::U8(v0), &Value::U8(ref v1)) => v0.cmp(v1),
+            (&Value::U16(v0), &Value::U16(ref v1)) => v0.cmp(v1),
+            (&Value::U32(v0), &Value::U32(ref v1)) => v0.cmp(v1),
+            (&Value::U64(v0), &Value::U64(ref v1)) => v0.cmp(v1),
+            (&Value::I8(v0), &Value::I8(ref v1)) => v0.cmp(v1),
+            (&Value::I16(v0), &Value::I16(ref v1)) => v0.cmp(v1),
+            (&Value::I32(v0), &Value::I32(ref v1)) => v0.cmp(v1),
+            (&Value::I64(v0), &Value::I64(ref v1)) => v0.cmp(v1),
+            (&Value::F32(v0), &Value::F32(v1)) => OrderedFloat(v0).cmp(&OrderedFloat(v1)),
+            (&Value::F64(v0), &Value::F64(v1)) => OrderedFloat(v0).cmp(&OrderedFloat(v1)),
+            (&Value::Char(v0), &Value::Char(ref v1)) => v0.cmp(v1),
+            (&Value::String(ref v0), &Value::String(ref v1)) => v0.cmp(v1),
+            (&Value::Unit, &Value::Unit) => Ordering::Equal,
+            (&Value::Option(ref v0), &Value::Option(ref v1)) => v0.cmp(v1),
+            (&Value::Newtype(ref v0), &Value::Newtype(ref v1)) => v0.cmp(v1),
+            (&Value::Seq(ref v0), &Value::Seq(ref v1)) => v0.cmp(v1),
+            (&Value::Map(ref v0), &Value::Map(ref v1)) => v0.cmp(v1),
+            (&Value::Bytes(ref v0), &Value::Bytes(ref v1)) => v0.cmp(v1),
+            (ref v0, ref v1) => v0.discriminant().cmp(&v1.discriminant()),
+        }
+    }
+}
+
+impl Value {
+    fn discriminant(&self) -> usize {
+        match *self {
+            Value::Bool(..) => 0,
+            Value::U8(..) => 1,
+            Value::U16(..) => 2,
+            Value::U32(..) => 3,
+            Value::U64(..) => 4,
+            Value::I8(..) => 5,
+            Value::I16(..) => 6,
+            Value::I32(..) => 7,
+            Value::I64(..) => 8,
+            Value::F32(..) => 9,
+            Value::F64(..) => 10,
+            Value::Char(..) => 11,
+            Value::String(..) => 12,
+            Value::Unit => 13,
+            Value::Option(..) => 14,
+            Value::Newtype(..) => 15,
+            Value::Seq(..) => 16,
+            Value::Map(..) => 17,
+            Value::Bytes(..) => 18,
+        }
+    }
+
+    fn unexpected(&self) -> serde::de::Unexpected {
+        match *self {
+            Value::Bool(b) => serde::de::Unexpected::Bool(b),
+            Value::U8(n) => serde::de::Unexpected::Unsigned(n as u64),
+            Value::U16(n) => serde::de::Unexpected::Unsigned(n as u64),
+            Value::U32(n) => serde::de::Unexpected::Unsigned(n as u64),
+            Value::U64(n) => serde::de::Unexpected::Unsigned(n),
+            Value::I8(n) => serde::de::Unexpected::Signed(n as i64),
+            Value::I16(n) => serde::de::Unexpected::Signed(n as i64),
+            Value::I32(n) => serde::de::Unexpected::Signed(n as i64),
+            Value::I64(n) => serde::de::Unexpected::Signed(n),
+            Value::F32(n) => serde::de::Unexpected::Float(n as f64),
+            Value::F64(n) => serde::de::Unexpected::Float(n),
+            Value::Char(c) => serde::de::Unexpected::Char(c),
+            Value::String(ref s) => serde::de::Unexpected::Str(s),
+            Value::Unit => serde::de::Unexpected::Unit,
+            Value::Option(_) => serde::de::Unexpected::Option,
+            Value::Newtype(_) => serde::de::Unexpected::NewtypeStruct,
+            Value::Seq(_) => serde::de::Unexpected::Seq,
+            Value::Map(_) => serde::de::Unexpected::Map,
+            Value::Bytes(ref b) => serde::de::Unexpected::Bytes(b),
+        }
+    }
+
+    pub fn deserialize_into<'de, T: Deserialize<'de>>(self) -> Result<T, DeserializerError> {
+        T::deserialize(self)
+    }
+}
+
+impl Eq for Value { }
+impl PartialOrd for Value {
+    fn partial_cmp(&self, rhs: &Self) -> Option<Ordering> {
+        Some(self.cmp(rhs))
+    }
+}
+
+#[cfg(test)]
+use serde_derive::{Deserialize, Serialize};
+
+#[test]
+fn de_smoke_test() {
+    // some convoluted Value
+    let value = Value::Option(Some(Box::new(Value::Seq(vec![
+        Value::U16(8),
+        Value::Char('a'),
+        Value::F32(1.0),
+        Value::String("hello".into()),
+        Value::Map(vec![
+            (Value::Bool(false), Value::Unit),
+            (Value::Bool(true), Value::Newtype(Box::new(
+                Value::Bytes(b"hi".as_ref().into())
+            ))),
+        ].into_iter().collect()),
+    ]))));
+
+    // assert that the value remains unchanged through deserialization
+    let value_de = Value::deserialize(value.clone()).unwrap();
+    assert_eq!(value_de, value);
+}
+
+#[test]
+fn ser_smoke_test() {
+    #[derive(Serialize)]
+    struct Foo {
+        a: u32,
+        b: String,
+        c: Vec<bool>,
+    }
+
+    let foo = Foo {
+        a: 15,
+        b: "hello".into(),
+        c: vec![true, false],
+    };
+
+    let expected = Value::Map(vec![
+        (Value::String("a".into()), Value::U32(15)),
+        (Value::String("b".into()), Value::String("hello".into())),
+        (Value::String("c".into()), Value::Seq(vec![Value::Bool(true), Value::Bool(false)])),
+    ].into_iter().collect());
+
+    let value = to_value(&foo).unwrap();
+    assert_eq!(expected, value);
+}
+
+#[test]
+fn deserialize_into_enum() {
+    #[derive(Deserialize, Debug, PartialEq, Eq)]
+    enum Foo {
+        Bar,
+        Baz(u8),
+    }
+
+    let value = Value::String("Bar".into());
+    assert_eq!(Foo::deserialize(value).unwrap(), Foo::Bar);
+
+    let value = Value::Map(vec![
+        (Value::String("Baz".into()), Value::U8(1))
+    ].into_iter().collect());
+    assert_eq!(Foo::deserialize(value).unwrap(), Foo::Baz(1));
+}
+
+#[test]
+fn serialize_from_enum() {
+    #[derive(Serialize)]
+    enum Foo {
+        Bar,
+        Baz(u8),
+        Qux { quux: u8 },
+        Corge(u8, u8),
+    }
+
+    let bar = Foo::Bar;
+    assert_eq!(to_value(&bar).unwrap(), Value::String("Bar".into()));
+
+    let baz = Foo::Baz(1);
+    assert_eq!(
+        to_value(&baz).unwrap(),
+        Value::Map(
+            vec![(Value::String("Baz".into()), Value::U8(1))]
+                .into_iter()
+                .collect(),
+        )
+    );
+
+    let qux = Foo::Qux { quux: 2 };
+    assert_eq!(
+        to_value(&qux).unwrap(),
+        Value::Map(
+            vec![(
+                Value::String("Qux".into()),
+                Value::Map(
+                    vec![(Value::String("quux".into()), Value::U8(2))]
+                        .into_iter()
+                        .collect()
+                )
+            )]
+            .into_iter()
+            .collect()
+        )
+    );
+
+    let corge = Foo::Corge(3, 4);
+    assert_eq!(
+        to_value(&corge).unwrap(),
+        Value::Map(
+            vec![(
+                Value::String("Corge".into()),
+                Value::Seq(vec![Value::U8(3), Value::U8(4)])
+            )]
+            .into_iter()
+            .collect()
+        )
+    );
+}
+
+#[test]
+fn deserialize_inside_deserialize_impl() {
+    #[derive(Debug, PartialEq, Eq)]
+    enum Event {
+        Added(u32),
+        Error(u8),
+    }
+
+    impl<'de> serde::Deserialize<'de> for Event {
+        fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
+            #[derive(Deserialize)]
+            struct RawEvent {
+                kind: String,
+                object: Value,
+            }
+
+            let raw_event = RawEvent::deserialize(deserializer)?;
+
+            // Cannot directly use Value as Deserializer, since error type needs to be
+            // generic D::Error rather than specific serde_value::DeserializerError
+            let object_deserializer = ValueDeserializer::new(raw_event.object);
+
+            Ok(match &*raw_event.kind {
+                "ADDED" => Event::Added(<_>::deserialize(object_deserializer)?),
+                "ERROR" => Event::Error(<_>::deserialize(object_deserializer)?),
+                kind => return Err(serde::de::Error::unknown_variant(kind, &["ADDED", "ERROR"])),
+            })
+        }
+    }
+
+    let input = Value::Map(vec![
+        (Value::String("kind".to_owned()), Value::String("ADDED".to_owned())),
+        (Value::String("object".to_owned()), Value::U32(5)),
+    ].into_iter().collect());
+    let event = Event::deserialize(input).expect("could not deserialize ADDED event");
+    assert_eq!(event, Event::Added(5));
+
+    let input = Value::Map(vec![
+        (Value::String("kind".to_owned()), Value::String("ERROR".to_owned())),
+        (Value::String("object".to_owned()), Value::U8(5)),
+    ].into_iter().collect());
+    let event = Event::deserialize(input).expect("could not deserialize ERROR event");
+    assert_eq!(event, Event::Error(5));
+
+    let input = Value::Map(vec![
+        (Value::String("kind".to_owned()), Value::String("ADDED".to_owned())),
+        (Value::String("object".to_owned()), Value::Unit),
+    ].into_iter().collect());
+    let _ = Event::deserialize(input).expect_err("expected deserializing bad ADDED event to fail");
+}
+
+#[test]
+fn deserialize_newtype() {
+    #[derive(Debug, Deserialize, PartialEq)]
+    struct Foo(i32);
+
+    let input = Value::I32(5);
+    let foo = Foo::deserialize(input).unwrap();
+    assert_eq!(foo, Foo(5));
+}
+
+#[test]
+fn deserialize_newtype2() {
+    #[derive(Debug, Deserialize, PartialEq)]
+    struct Foo(i32);
+
+    #[derive(Debug, Deserialize, PartialEq)]
+    struct Bar {
+        foo: Foo,
+    }
+
+    let input = Value::Map(vec![
+        (Value::String("foo".to_owned()), Value::I32(5))
+    ].into_iter().collect());
+    let bar = Bar::deserialize(input).unwrap();
+    assert_eq!(bar, Bar { foo: Foo(5) });
+}
diff --git a/vendor/serde-value/src/ser.rs b/vendor/serde-value/src/ser.rs
new file mode 100644
index 0000000..654fa5d
--- /dev/null
+++ b/vendor/serde-value/src/ser.rs
@@ -0,0 +1,438 @@
+use serde::ser;
+use std::collections::BTreeMap;
+use std::error::Error;
+use std::fmt;
+
+use crate::Value;
+
+#[derive(Debug)]
+pub enum SerializerError {
+    Custom(String),
+}
+
+impl fmt::Display for SerializerError {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            SerializerError::Custom(ref s) => fmt.write_str(s),
+        }
+    }
+}
+
+impl Error for SerializerError {
+    fn description(&self) -> &str {
+        "Value serializer error"
+    }
+}
+
+impl ser::Error for SerializerError {
+    fn custom<T: fmt::Display>(msg: T) -> SerializerError {
+        SerializerError::Custom(msg.to_string())
+    }
+}
+
+impl ser::Serialize for Value {
+    fn serialize<S: ser::Serializer>(&self, s: S) -> Result<S::Ok, S::Error> {
+        match *self {
+            Value::Bool(v) => s.serialize_bool(v),
+            Value::U8(v) => s.serialize_u8(v),
+            Value::U16(v) => s.serialize_u16(v),
+            Value::U32(v) => s.serialize_u32(v),
+            Value::U64(v) => s.serialize_u64(v),
+            Value::I8(v) => s.serialize_i8(v),
+            Value::I16(v) => s.serialize_i16(v),
+            Value::I32(v) => s.serialize_i32(v),
+            Value::I64(v) => s.serialize_i64(v),
+            Value::F32(v) => s.serialize_f32(v),
+            Value::F64(v) => s.serialize_f64(v),
+            Value::Char(v) => s.serialize_char(v),
+            Value::String(ref v) => s.serialize_str(v),
+            Value::Unit => s.serialize_unit(),
+            Value::Option(None) => s.serialize_none(),
+            Value::Option(Some(ref v)) => s.serialize_some(v),
+            Value::Newtype(ref v) => s.serialize_newtype_struct("", v),
+            Value::Seq(ref v) => v.serialize(s),
+            Value::Map(ref v) => v.serialize(s),
+            Value::Bytes(ref v) => s.serialize_bytes(v),
+        }
+    }
+}
+
+pub fn to_value<T: ser::Serialize>(value: T) -> Result<Value, SerializerError> {
+    value.serialize(Serializer)
+}
+
+struct Serializer;
+
+impl ser::Serializer for Serializer {
+    type Ok = Value;
+    type Error = SerializerError;
+    type SerializeSeq = SerializeSeq;
+    type SerializeTuple = SerializeTuple;
+    type SerializeTupleStruct = SerializeTupleStruct;
+    type SerializeTupleVariant = SerializeTupleVariant;
+    type SerializeMap = SerializeMap;
+    type SerializeStruct = SerializeStruct;
+    type SerializeStructVariant = SerializeStructVariant;
+
+    fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Bool(v))
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::I8(v))
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::I16(v))
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::I32(v))
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::I64(v))
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::U8(v))
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::U16(v))
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::U32(v))
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::U64(v))
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::F32(v))
+    }
+
+    fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::F64(v))
+    }
+
+    fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Char(v))
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::String(v.to_string()))
+    }
+
+    fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Bytes(v.to_vec()))
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Option(None))
+    }
+
+    fn serialize_some<T: ?Sized>(
+        self,
+        value: &T
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize
+    {
+        value.serialize(Serializer).map(|v| Value::Option(Some(Box::new(v))))
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Unit)
+    }
+
+    fn serialize_unit_struct(
+        self,
+        _name: &'static str
+    ) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Unit)
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::String(variant.to_string()))
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize
+    {
+        value.serialize(Serializer).map(|v| Value::Newtype(Box::new(v)))
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        value: &T
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: ser::Serialize
+    {
+        value.serialize(Serializer).map(|v| {
+            let mut map = BTreeMap::new();
+            map.insert(Value::String(variant.to_string()), v);
+            Value::Map(map)
+        })
+    }
+
+    fn serialize_seq(
+        self,
+        _len: Option<usize>
+    ) -> Result<Self::SerializeSeq, Self::Error> {
+        Ok(SerializeSeq(vec![]))
+    }
+
+    fn serialize_tuple(
+        self,
+        _len: usize
+    ) -> Result<Self::SerializeTuple, Self::Error> {
+        Ok(SerializeTuple(vec![]))
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Ok(SerializeTupleStruct(vec![]))
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        len: usize
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Ok(SerializeTupleVariant(
+            Value::String(variant.to_string()),
+            Vec::with_capacity(len),
+        ))
+    }
+
+    fn serialize_map(
+        self,
+        _len: Option<usize>
+    ) -> Result<Self::SerializeMap, Self::Error> {
+        Ok(SerializeMap { map: BTreeMap::new(), key: None })
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Ok(SerializeStruct(BTreeMap::new()))
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        _len: usize
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Ok(SerializeStructVariant(
+            Value::String(variant.to_string()),
+            BTreeMap::new(),
+        ))
+    }
+}
+
+struct SerializeSeq(Vec<Value>);
+
+impl ser::SerializeSeq for SerializeSeq {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_element<T: ?Sized>(
+        &mut self,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let value = value.serialize(Serializer)?;
+        self.0.push(value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Seq(self.0))
+    }
+}
+
+struct SerializeTuple(Vec<Value>);
+
+impl ser::SerializeTuple for SerializeTuple {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_element<T: ?Sized>(
+        &mut self,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let value = value.serialize(Serializer)?;
+        self.0.push(value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Seq(self.0))
+    }
+}
+
+struct SerializeTupleStruct(Vec<Value>);
+
+impl ser::SerializeTupleStruct for SerializeTupleStruct {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let value = value.serialize(Serializer)?;
+        self.0.push(value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Seq(self.0))
+    }
+}
+
+struct SerializeTupleVariant(Value, Vec<Value>);
+
+impl ser::SerializeTupleVariant for SerializeTupleVariant {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let value = value.serialize(Serializer)?;
+        self.1.push(value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let mut map = BTreeMap::new();
+        map.insert(self.0, Value::Seq(self.1));
+        Ok(Value::Map(map))
+    }
+}
+
+struct SerializeMap {
+    map: BTreeMap<Value, Value>,
+    key: Option<Value>,
+}
+
+impl ser::SerializeMap for SerializeMap {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let key = key.serialize(Serializer)?;
+        self.key = Some(key);
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(
+        &mut self,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let value = value.serialize(Serializer)?;
+        self.map.insert(self.key.take().unwrap(), value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Map(self.map))
+    }
+}
+
+struct SerializeStruct(BTreeMap<Value, Value>);
+
+impl ser::SerializeStruct for SerializeStruct {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let key = Value::String(key.to_string());
+        let value = value.serialize(Serializer)?;
+        self.0.insert(key, value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(Value::Map(self.0))
+    }
+}
+
+struct SerializeStructVariant(Value, BTreeMap<Value, Value>);
+
+impl ser::SerializeStructVariant for SerializeStructVariant {
+    type Ok = Value;
+    type Error = SerializerError;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T
+    ) -> Result<(), Self::Error>
+    where
+        T: ser::Serialize
+    {
+        let key = Value::String(key.to_string());
+        let value = value.serialize(Serializer)?;
+        self.1.insert(key, value);
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        let mut map = BTreeMap::new();
+        map.insert(self.0, Value::Map(self.1));
+        Ok(Value::Map(map))
+    }
+}