RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/log/src/kv/error.rs

@@ -0,0 +1,90 @@
+use std::fmt;
+
+/// An error encountered while working with structured data.
+#[derive(Debug)]
+pub struct Error {
+    inner: Inner,
+}
+
+#[derive(Debug)]
+enum Inner {
+    #[cfg(feature = "std")]
+    Boxed(std_support::BoxedError),
+    Msg(&'static str),
+    Value(value_bag::Error),
+    Fmt,
+}
+
+impl Error {
+    /// Create an error from a message.
+    pub fn msg(msg: &'static str) -> Self {
+        Error {
+            inner: Inner::Msg(msg),
+        }
+    }
+
+    // Not public so we don't leak the `value_bag` API
+    pub(super) fn from_value(err: value_bag::Error) -> Self {
+        Error {
+            inner: Inner::Value(err),
+        }
+    }
+
+    // Not public so we don't leak the `value_bag` API
+    pub(super) fn into_value(self) -> value_bag::Error {
+        match self.inner {
+            Inner::Value(err) => err,
+            #[cfg(feature = "kv_unstable_std")]
+            _ => value_bag::Error::boxed(self),
+            #[cfg(not(feature = "kv_unstable_std"))]
+            _ => value_bag::Error::msg("error inspecting a value"),
+        }
+    }
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::Inner::*;
+        match &self.inner {
+            #[cfg(feature = "std")]
+            &Boxed(ref err) => err.fmt(f),
+            &Value(ref err) => err.fmt(f),
+            &Msg(ref msg) => msg.fmt(f),
+            &Fmt => fmt::Error.fmt(f),
+        }
+    }
+}
+
+impl From<fmt::Error> for Error {
+    fn from(_: fmt::Error) -> Self {
+        Error { inner: Inner::Fmt }
+    }
+}
+
+#[cfg(feature = "std")]
+mod std_support {
+    use super::*;
+    use std::{error, io};
+
+    pub(super) type BoxedError = Box<dyn error::Error + Send + Sync>;
+
+    impl Error {
+        /// Create an error from a standard error type.
+        pub fn boxed<E>(err: E) -> Self
+        where
+            E: Into<BoxedError>,
+        {
+            Error {
+                inner: Inner::Boxed(err.into()),
+            }
+        }
+    }
+
+    impl error::Error for Error {}
+
+    impl From<io::Error> for Error {
+        fn from(err: io::Error) -> Self {
+            Error::boxed(err)
+        }
+    }
+}

zeroidc/vendor/log/src/kv/key.rs

@@ -0,0 +1,172 @@
+//! Structured keys.
+
+use std::borrow::Borrow;
+use std::cmp;
+use std::fmt;
+use std::hash;
+
+/// A type that can be converted into a [`Key`](struct.Key.html).
+pub trait ToKey {
+    /// Perform the conversion.
+    fn to_key(&self) -> Key;
+}
+
+impl<'a, T> ToKey for &'a T
+where
+    T: ToKey + ?Sized,
+{
+    fn to_key(&self) -> Key {
+        (**self).to_key()
+    }
+}
+
+impl<'k> ToKey for Key<'k> {
+    fn to_key(&self) -> Key {
+        Key { key: self.key }
+    }
+}
+
+impl ToKey for str {
+    fn to_key(&self) -> Key {
+        Key::from_str(self)
+    }
+}
+
+/// A key in a structured key-value pair.
+#[derive(Clone)]
+pub struct Key<'k> {
+    key: &'k str,
+}
+
+impl<'k> Key<'k> {
+    /// Get a key from a borrowed string.
+    pub fn from_str(key: &'k str) -> Self {
+        Key { key: key }
+    }
+
+    /// Get a borrowed string from this key.
+    pub fn as_str(&self) -> &str {
+        self.key
+    }
+}
+
+impl<'k> fmt::Debug for Key<'k> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.key.fmt(f)
+    }
+}
+
+impl<'k> fmt::Display for Key<'k> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.key.fmt(f)
+    }
+}
+
+impl<'k> hash::Hash for Key<'k> {
+    fn hash<H>(&self, state: &mut H)
+    where
+        H: hash::Hasher,
+    {
+        self.as_str().hash(state)
+    }
+}
+
+impl<'k, 'ko> PartialEq<Key<'ko>> for Key<'k> {
+    fn eq(&self, other: &Key<'ko>) -> bool {
+        self.as_str().eq(other.as_str())
+    }
+}
+
+impl<'k> Eq for Key<'k> {}
+
+impl<'k, 'ko> PartialOrd<Key<'ko>> for Key<'k> {
+    fn partial_cmp(&self, other: &Key<'ko>) -> Option<cmp::Ordering> {
+        self.as_str().partial_cmp(other.as_str())
+    }
+}
+
+impl<'k> Ord for Key<'k> {
+    fn cmp(&self, other: &Self) -> cmp::Ordering {
+        self.as_str().cmp(other.as_str())
+    }
+}
+
+impl<'k> AsRef<str> for Key<'k> {
+    fn as_ref(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl<'k> Borrow<str> for Key<'k> {
+    fn borrow(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl<'k> From<&'k str> for Key<'k> {
+    fn from(s: &'k str) -> Self {
+        Key::from_str(s)
+    }
+}
+
+#[cfg(feature = "std")]
+mod std_support {
+    use super::*;
+
+    use std::borrow::Cow;
+
+    impl ToKey for String {
+        fn to_key(&self) -> Key {
+            Key::from_str(self)
+        }
+    }
+
+    impl<'a> ToKey for Cow<'a, str> {
+        fn to_key(&self) -> Key {
+            Key::from_str(self)
+        }
+    }
+}
+
+#[cfg(feature = "kv_unstable_sval")]
+mod sval_support {
+    use super::*;
+
+    extern crate sval;
+
+    use self::sval::value::{self, Value};
+
+    impl<'a> Value for Key<'a> {
+        fn stream(&self, stream: &mut value::Stream) -> value::Result {
+            self.key.stream(stream)
+        }
+    }
+}
+
+#[cfg(feature = "kv_unstable_serde")]
+mod serde_support {
+    use super::*;
+
+    extern crate serde;
+
+    use self::serde::{Serialize, Serializer};
+
+    impl<'a> Serialize for Key<'a> {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            self.key.serialize(serializer)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn key_from_string() {
+        assert_eq!("a key", Key::from_str("a key").as_str());
+    }
+}

zeroidc/vendor/log/src/kv/mod.rs

@@ -0,0 +1,26 @@
+//! **UNSTABLE:** Structured key-value pairs.
+//!
+//! This module is unstable and breaking changes may be made
+//! at any time. See [the tracking issue](https://github.com/rust-lang-nursery/log/issues/328)
+//! for more details.
+//!
+//! Add the `kv_unstable` feature to your `Cargo.toml` to enable
+//! this module:
+//!
+//! ```toml
+//! [dependencies.log]
+//! features = ["kv_unstable"]
+//! ```
+
+mod error;
+mod key;
+pub mod source;
+
+pub mod value;
+
+pub use self::error::Error;
+pub use self::key::{Key, ToKey};
+pub use self::source::{Source, Visitor};
+
+#[doc(inline)]
+pub use self::value::{ToValue, Value};

zeroidc/vendor/log/src/kv/source.rs

@@ -0,0 +1,754 @@
+//! Sources for key-value pairs.
+
+#[cfg(feature = "kv_unstable_sval")]
+extern crate sval;
+
+#[cfg(feature = "kv_unstable_serde")]
+extern crate serde;
+
+use kv::{Error, Key, ToKey, ToValue, Value};
+use std::fmt;
+
+/// A source of key-value pairs.
+///
+/// The source may be a single pair, a set of pairs, or a filter over a set of pairs.
+/// Use the [`Visitor`](trait.Visitor.html) trait to inspect the structured data
+/// in a source.
+pub trait Source {
+    /// Visit key-value pairs.
+    ///
+    /// A source doesn't have to guarantee any ordering or uniqueness of key-value pairs.
+    /// If the given visitor returns an error then the source may early-return with it,
+    /// even if there are more key-value pairs.
+    ///
+    /// # Implementation notes
+    ///
+    /// A source should yield the same key-value pairs to a subsequent visitor unless
+    /// that visitor itself fails.
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error>;
+
+    /// Get the value for a given key.
+    ///
+    /// If the key appears multiple times in the source then which key is returned
+    /// is implementation specific.
+    ///
+    /// # Implementation notes
+    ///
+    /// A source that can provide a more efficient implementation of this method
+    /// should override it.
+    #[cfg(not(test))]
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        get_default(self, key)
+    }
+
+    #[cfg(test)]
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>>;
+
+    /// Count the number of key-value pairs that can be visited.
+    ///
+    /// # Implementation notes
+    ///
+    /// A source that knows the number of key-value pairs upfront may provide a more
+    /// efficient implementation.
+    ///
+    /// A subsequent call to `visit` should yield the same number of key-value pairs
+    /// to the visitor, unless that visitor fails part way through.
+    #[cfg(not(test))]
+    fn count(&self) -> usize {
+        count_default(self)
+    }
+
+    #[cfg(test)]
+    fn count(&self) -> usize;
+}
+
+/// The default implemention of `Source::get`
+pub(crate) fn get_default<'v>(source: &'v (impl Source + ?Sized), key: Key) -> Option<Value<'v>> {
+    struct Get<'k, 'v> {
+        key: Key<'k>,
+        found: Option<Value<'v>>,
+    }
+
+    impl<'k, 'kvs> Visitor<'kvs> for Get<'k, 'kvs> {
+        fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+            if self.key == key {
+                self.found = Some(value);
+            }
+
+            Ok(())
+        }
+    }
+
+    let mut get = Get { key, found: None };
+
+    let _ = source.visit(&mut get);
+    get.found
+}
+
+/// The default implementation of `Source::count`.
+pub(crate) fn count_default(source: impl Source) -> usize {
+    struct Count(usize);
+
+    impl<'kvs> Visitor<'kvs> for Count {
+        fn visit_pair(&mut self, _: Key<'kvs>, _: Value<'kvs>) -> Result<(), Error> {
+            self.0 += 1;
+
+            Ok(())
+        }
+    }
+
+    let mut count = Count(0);
+    let _ = source.visit(&mut count);
+    count.0
+}
+
+impl<'a, T> Source for &'a T
+where
+    T: Source + ?Sized,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        Source::visit(&**self, visitor)
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        Source::get(&**self, key)
+    }
+
+    fn count(&self) -> usize {
+        Source::count(&**self)
+    }
+}
+
+impl<K, V> Source for (K, V)
+where
+    K: ToKey,
+    V: ToValue,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        visitor.visit_pair(self.0.to_key(), self.1.to_value())
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        if self.0.to_key() == key {
+            Some(self.1.to_value())
+        } else {
+            None
+        }
+    }
+
+    fn count(&self) -> usize {
+        1
+    }
+}
+
+impl<S> Source for [S]
+where
+    S: Source,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        for source in self {
+            source.visit(visitor)?;
+        }
+
+        Ok(())
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        for source in self {
+            if let Some(found) = source.get(key.clone()) {
+                return Some(found);
+            }
+        }
+
+        None
+    }
+
+    fn count(&self) -> usize {
+        self.len()
+    }
+}
+
+impl<S> Source for Option<S>
+where
+    S: Source,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        if let Some(ref source) = *self {
+            source.visit(visitor)?;
+        }
+
+        Ok(())
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        self.as_ref().and_then(|s| s.get(key))
+    }
+
+    fn count(&self) -> usize {
+        self.as_ref().map(Source::count).unwrap_or(0)
+    }
+}
+
+/// A visitor for the key-value pairs in a [`Source`](trait.Source.html).
+pub trait Visitor<'kvs> {
+    /// Visit a key-value pair.
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error>;
+}
+
+impl<'a, 'kvs, T> Visitor<'kvs> for &'a mut T
+where
+    T: Visitor<'kvs> + ?Sized,
+{
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+        (**self).visit_pair(key, value)
+    }
+}
+
+impl<'a, 'b: 'a, 'kvs> Visitor<'kvs> for fmt::DebugMap<'a, 'b> {
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+        self.entry(&key, &value);
+        Ok(())
+    }
+}
+
+impl<'a, 'b: 'a, 'kvs> Visitor<'kvs> for fmt::DebugList<'a, 'b> {
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+        self.entry(&(key, value));
+        Ok(())
+    }
+}
+
+impl<'a, 'b: 'a, 'kvs> Visitor<'kvs> for fmt::DebugSet<'a, 'b> {
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+        self.entry(&(key, value));
+        Ok(())
+    }
+}
+
+impl<'a, 'b: 'a, 'kvs> Visitor<'kvs> for fmt::DebugTuple<'a, 'b> {
+    fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+        self.field(&key);
+        self.field(&value);
+        Ok(())
+    }
+}
+
+#[cfg(feature = "std")]
+mod std_support {
+    use super::*;
+    use std::borrow::Borrow;
+    use std::collections::{BTreeMap, HashMap};
+    use std::hash::{BuildHasher, Hash};
+
+    impl<S> Source for Box<S>
+    where
+        S: Source + ?Sized,
+    {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+            Source::visit(&**self, visitor)
+        }
+
+        fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+            Source::get(&**self, key)
+        }
+
+        fn count(&self) -> usize {
+            Source::count(&**self)
+        }
+    }
+
+    impl<S> Source for Vec<S>
+    where
+        S: Source,
+    {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+            Source::visit(&**self, visitor)
+        }
+
+        fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+            Source::get(&**self, key)
+        }
+
+        fn count(&self) -> usize {
+            Source::count(&**self)
+        }
+    }
+
+    impl<'kvs, V> Visitor<'kvs> for Box<V>
+    where
+        V: Visitor<'kvs> + ?Sized,
+    {
+        fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+            (**self).visit_pair(key, value)
+        }
+    }
+
+    impl<K, V, S> Source for HashMap<K, V, S>
+    where
+        K: ToKey + Borrow<str> + Eq + Hash,
+        V: ToValue,
+        S: BuildHasher,
+    {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+            for (key, value) in self {
+                visitor.visit_pair(key.to_key(), value.to_value())?;
+            }
+            Ok(())
+        }
+
+        fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+            HashMap::get(self, key.as_str()).map(|v| v.to_value())
+        }
+
+        fn count(&self) -> usize {
+            self.len()
+        }
+    }
+
+    impl<K, V> Source for BTreeMap<K, V>
+    where
+        K: ToKey + Borrow<str> + Ord,
+        V: ToValue,
+    {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+            for (key, value) in self {
+                visitor.visit_pair(key.to_key(), value.to_value())?;
+            }
+            Ok(())
+        }
+
+        fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+            BTreeMap::get(self, key.as_str()).map(|v| v.to_value())
+        }
+
+        fn count(&self) -> usize {
+            self.len()
+        }
+    }
+
+    #[cfg(test)]
+    mod tests {
+        use super::*;
+        use kv::value::tests::Token;
+        use std::collections::{BTreeMap, HashMap};
+
+        #[test]
+        fn count() {
+            assert_eq!(1, Source::count(&Box::new(("a", 1))));
+            assert_eq!(2, Source::count(&vec![("a", 1), ("b", 2)]));
+        }
+
+        #[test]
+        fn get() {
+            let source = vec![("a", 1), ("b", 2), ("a", 1)];
+            assert_eq!(
+                Token::I64(1),
+                Source::get(&source, Key::from_str("a")).unwrap().to_token()
+            );
+
+            let source = Box::new(Option::None::<(&str, i32)>);
+            assert!(Source::get(&source, Key::from_str("a")).is_none());
+        }
+
+        #[test]
+        fn hash_map() {
+            let mut map = HashMap::new();
+            map.insert("a", 1);
+            map.insert("b", 2);
+
+            assert_eq!(2, Source::count(&map));
+            assert_eq!(
+                Token::I64(1),
+                Source::get(&map, Key::from_str("a")).unwrap().to_token()
+            );
+        }
+
+        #[test]
+        fn btree_map() {
+            let mut map = BTreeMap::new();
+            map.insert("a", 1);
+            map.insert("b", 2);
+
+            assert_eq!(2, Source::count(&map));
+            assert_eq!(
+                Token::I64(1),
+                Source::get(&map, Key::from_str("a")).unwrap().to_token()
+            );
+        }
+    }
+}
+
+/// The result of calling `Source::as_map`.
+pub struct AsMap<S>(S);
+
+/// Visit this source as a map.
+pub fn as_map<S>(source: S) -> AsMap<S>
+where
+    S: Source,
+{
+    AsMap(source)
+}
+
+impl<S> Source for AsMap<S>
+where
+    S: Source,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        self.0.visit(visitor)
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        self.0.get(key)
+    }
+
+    fn count(&self) -> usize {
+        self.0.count()
+    }
+}
+
+impl<S> fmt::Debug for AsMap<S>
+where
+    S: Source,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut f = f.debug_map();
+        self.0.visit(&mut f).map_err(|_| fmt::Error)?;
+        f.finish()
+    }
+}
+
+/// The result of calling `Source::as_list`
+pub struct AsList<S>(S);
+
+/// Visit this source as a list.
+pub fn as_list<S>(source: S) -> AsList<S>
+where
+    S: Source,
+{
+    AsList(source)
+}
+
+impl<S> Source for AsList<S>
+where
+    S: Source,
+{
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+        self.0.visit(visitor)
+    }
+
+    fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+        self.0.get(key)
+    }
+
+    fn count(&self) -> usize {
+        self.0.count()
+    }
+}
+
+impl<S> fmt::Debug for AsList<S>
+where
+    S: Source,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut f = f.debug_list();
+        self.0.visit(&mut f).map_err(|_| fmt::Error)?;
+        f.finish()
+    }
+}
+
+#[cfg(feature = "kv_unstable_sval")]
+mod sval_support {
+    use super::*;
+
+    use self::sval::value;
+
+    impl<S> value::Value for AsMap<S>
+    where
+        S: Source,
+    {
+        fn stream(&self, stream: &mut value::Stream) -> value::Result {
+            struct StreamVisitor<'a, 'b>(&'a mut value::Stream<'b>);
+
+            impl<'a, 'b, 'kvs> Visitor<'kvs> for StreamVisitor<'a, 'b> {
+                fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+                    self.0
+                        .map_key(key)
+                        .map_err(|_| Error::msg("failed to stream map key"))?;
+                    self.0
+                        .map_value(value)
+                        .map_err(|_| Error::msg("failed to stream map value"))?;
+                    Ok(())
+                }
+            }
+
+            stream
+                .map_begin(Some(self.count()))
+                .map_err(|_| self::sval::Error::msg("failed to begin map"))?;
+
+            self.visit(&mut StreamVisitor(stream))
+                .map_err(|_| self::sval::Error::msg("failed to visit key-values"))?;
+
+            stream
+                .map_end()
+                .map_err(|_| self::sval::Error::msg("failed to end map"))
+        }
+    }
+
+    impl<S> value::Value for AsList<S>
+    where
+        S: Source,
+    {
+        fn stream(&self, stream: &mut value::Stream) -> value::Result {
+            struct StreamVisitor<'a, 'b>(&'a mut value::Stream<'b>);
+
+            impl<'a, 'b, 'kvs> Visitor<'kvs> for StreamVisitor<'a, 'b> {
+                fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+                    self.0
+                        .seq_elem((key, value))
+                        .map_err(|_| Error::msg("failed to stream seq entry"))?;
+                    Ok(())
+                }
+            }
+
+            stream
+                .seq_begin(Some(self.count()))
+                .map_err(|_| self::sval::Error::msg("failed to begin seq"))?;
+
+            self.visit(&mut StreamVisitor(stream))
+                .map_err(|_| self::sval::Error::msg("failed to visit key-values"))?;
+
+            stream
+                .seq_end()
+                .map_err(|_| self::sval::Error::msg("failed to end seq"))
+        }
+    }
+
+    #[cfg(test)]
+    mod tests {
+        use super::*;
+
+        use self::sval::Value;
+
+        use crate::kv::source;
+
+        #[test]
+        fn derive_stream() {
+            #[derive(Value)]
+            pub struct MyRecordAsMap<'a> {
+                msg: &'a str,
+                kvs: source::AsMap<&'a dyn Source>,
+            }
+
+            #[derive(Value)]
+            pub struct MyRecordAsList<'a> {
+                msg: &'a str,
+                kvs: source::AsList<&'a dyn Source>,
+            }
+        }
+    }
+}
+
+#[cfg(feature = "kv_unstable_serde")]
+pub mod as_map {
+    //! `serde` adapters for serializing a `Source` as a map.
+
+    use super::*;
+
+    use self::serde::{Serialize, Serializer};
+
+    /// Serialize a `Source` as a map.
+    pub fn serialize<T, S>(source: &T, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        T: Source,
+        S: Serializer,
+    {
+        as_map(source).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "kv_unstable_serde")]
+pub mod as_list {
+    //! `serde` adapters for serializing a `Source` as a list.
+
+    use super::*;
+
+    use self::serde::{Serialize, Serializer};
+
+    /// Serialize a `Source` as a list.
+    pub fn serialize<T, S>(source: &T, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        T: Source,
+        S: Serializer,
+    {
+        as_list(source).serialize(serializer)
+    }
+}
+
+#[cfg(feature = "kv_unstable_serde")]
+mod serde_support {
+    use super::*;
+
+    use self::serde::ser::{Error as SerError, Serialize, SerializeMap, SerializeSeq, Serializer};
+
+    impl<T> Serialize for AsMap<T>
+    where
+        T: Source,
+    {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            struct SerializerVisitor<'a, S>(&'a mut S);
+
+            impl<'a, 'kvs, S> Visitor<'kvs> for SerializerVisitor<'a, S>
+            where
+                S: SerializeMap,
+            {
+                fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+                    self.0
+                        .serialize_entry(&key, &value)
+                        .map_err(|_| Error::msg("failed to serialize map entry"))?;
+                    Ok(())
+                }
+            }
+
+            let mut map = serializer.serialize_map(Some(self.count()))?;
+
+            self.visit(&mut SerializerVisitor(&mut map))
+                .map_err(|_| S::Error::custom("failed to visit key-values"))?;
+
+            map.end()
+        }
+    }
+
+    impl<T> Serialize for AsList<T>
+    where
+        T: Source,
+    {
+        fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            struct SerializerVisitor<'a, S>(&'a mut S);
+
+            impl<'a, 'kvs, S> Visitor<'kvs> for SerializerVisitor<'a, S>
+            where
+                S: SerializeSeq,
+            {
+                fn visit_pair(&mut self, key: Key<'kvs>, value: Value<'kvs>) -> Result<(), Error> {
+                    self.0
+                        .serialize_element(&(key, value))
+                        .map_err(|_| Error::msg("failed to serialize seq entry"))?;
+                    Ok(())
+                }
+            }
+
+            let mut seq = serializer.serialize_seq(Some(self.count()))?;
+
+            self.visit(&mut SerializerVisitor(&mut seq))
+                .map_err(|_| S::Error::custom("failed to visit seq"))?;
+
+            seq.end()
+        }
+    }
+
+    #[cfg(test)]
+    mod tests {
+        use super::*;
+
+        use self::serde::Serialize;
+
+        use crate::kv::source;
+
+        #[test]
+        fn derive_serialize() {
+            #[derive(Serialize)]
+            pub struct MyRecordAsMap<'a> {
+                msg: &'a str,
+                #[serde(flatten)]
+                #[serde(with = "source::as_map")]
+                kvs: &'a dyn Source,
+            }
+
+            #[derive(Serialize)]
+            pub struct MyRecordAsList<'a> {
+                msg: &'a str,
+                #[serde(flatten)]
+                #[serde(with = "source::as_list")]
+                kvs: &'a dyn Source,
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use kv::value::tests::Token;
+
+    #[test]
+    fn source_is_object_safe() {
+        fn _check(_: &dyn Source) {}
+    }
+
+    #[test]
+    fn visitor_is_object_safe() {
+        fn _check(_: &dyn Visitor) {}
+    }
+
+    #[test]
+    fn count() {
+        struct OnePair {
+            key: &'static str,
+            value: i32,
+        }
+
+        impl Source for OnePair {
+            fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
+                visitor.visit_pair(self.key.to_key(), self.value.to_value())
+            }
+
+            fn get<'v>(&'v self, key: Key) -> Option<Value<'v>> {
+                get_default(self, key)
+            }
+
+            fn count(&self) -> usize {
+                count_default(self)
+            }
+        }
+
+        assert_eq!(1, Source::count(&("a", 1)));
+        assert_eq!(2, Source::count(&[("a", 1), ("b", 2)] as &[_]));
+        assert_eq!(0, Source::count(&Option::None::<(&str, i32)>));
+        assert_eq!(1, Source::count(&OnePair { key: "a", value: 1 }));
+    }
+
+    #[test]
+    fn get() {
+        let source = &[("a", 1), ("b", 2), ("a", 1)] as &[_];
+        assert_eq!(
+            Token::I64(1),
+            Source::get(source, Key::from_str("a")).unwrap().to_token()
+        );
+        assert_eq!(
+            Token::I64(2),
+            Source::get(source, Key::from_str("b")).unwrap().to_token()
+        );
+        assert!(Source::get(&source, Key::from_str("c")).is_none());
+
+        let source = Option::None::<(&str, i32)>;
+        assert!(Source::get(&source, Key::from_str("a")).is_none());
+    }
+
+    #[test]
+    fn as_map() {
+        let _ = crate::kv::source::as_map(("a", 1));
+        let _ = crate::kv::source::as_map(&("a", 1) as &dyn Source);
+    }
+
+    #[test]
+    fn as_list() {
+        let _ = crate::kv::source::as_list(("a", 1));
+        let _ = crate::kv::source::as_list(&("a", 1) as &dyn Source);
+    }
+}

zeroidc/vendor/log/src/macros.rs

@@ -0,0 +1,280 @@
+// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+/// The standard logging macro.
+///
+/// This macro will generically log with the specified `Level` and `format!`
+/// based argument list.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::{log, Level};
+///
+/// # fn main() {
+/// let data = (42, "Forty-two");
+/// let private_data = "private";
+///
+/// log!(Level::Error, "Received errors: {}, {}", data.0, data.1);
+/// log!(target: "app_events", Level::Warn, "App warning: {}, {}, {}",
+///     data.0, data.1, private_data);
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! log {
+    // log!(target: "my_target", Level::Info; key1 = 42, key2 = true; "a {} event", "log");
+    (target: $target:expr, $lvl:expr, $($key:tt = $value:expr),+; $($arg:tt)+) => ({
+        let lvl = $lvl;
+        if lvl <= $crate::STATIC_MAX_LEVEL && lvl <= $crate::max_level() {
+            $crate::__private_api_log(
+                __log_format_args!($($arg)+),
+                lvl,
+                &($target, __log_module_path!(), __log_file!(), __log_line!()),
+                $crate::__private_api::Option::Some(&[$((__log_key!($key), &$value)),+])
+            );
+        }
+    });
+
+    // log!(target: "my_target", Level::Info; "a {} event", "log");
+    (target: $target:expr, $lvl:expr, $($arg:tt)+) => ({
+        let lvl = $lvl;
+        if lvl <= $crate::STATIC_MAX_LEVEL && lvl <= $crate::max_level() {
+            $crate::__private_api_log(
+                __log_format_args!($($arg)+),
+                lvl,
+                &($target, __log_module_path!(), __log_file!(), __log_line!()),
+                $crate::__private_api::Option::None,
+            );
+        }
+    });
+
+    // log!(Level::Info, "a log event")
+    ($lvl:expr, $($arg:tt)+) => (log!(target: __log_module_path!(), $lvl, $($arg)+));
+}
+
+/// Logs a message at the error level.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::error;
+///
+/// # fn main() {
+/// let (err_info, port) = ("No connection", 22);
+///
+/// error!("Error: {} on port {}", err_info, port);
+/// error!(target: "app_events", "App Error: {}, Port: {}", err_info, 22);
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! error {
+    // error!(target: "my_target", key1 = 42, key2 = true; "a {} event", "log")
+    // error!(target: "my_target", "a {} event", "log")
+    (target: $target:expr, $($arg:tt)+) => (log!(target: $target, $crate::Level::Error, $($arg)+));
+
+    // error!("a {} event", "log")
+    ($($arg:tt)+) => (log!($crate::Level::Error, $($arg)+))
+}
+
+/// Logs a message at the warn level.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::warn;
+///
+/// # fn main() {
+/// let warn_description = "Invalid Input";
+///
+/// warn!("Warning! {}!", warn_description);
+/// warn!(target: "input_events", "App received warning: {}", warn_description);
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! warn {
+    // warn!(target: "my_target", key1 = 42, key2 = true; "a {} event", "log")
+    // warn!(target: "my_target", "a {} event", "log")
+    (target: $target:expr, $($arg:tt)+) => (log!(target: $target, $crate::Level::Warn, $($arg)+));
+
+    // warn!("a {} event", "log")
+    ($($arg:tt)+) => (log!($crate::Level::Warn, $($arg)+))
+}
+
+/// Logs a message at the info level.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::info;
+///
+/// # fn main() {
+/// # struct Connection { port: u32, speed: f32 }
+/// let conn_info = Connection { port: 40, speed: 3.20 };
+///
+/// info!("Connected to port {} at {} Mb/s", conn_info.port, conn_info.speed);
+/// info!(target: "connection_events", "Successfull connection, port: {}, speed: {}",
+///       conn_info.port, conn_info.speed);
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! info {
+    // info!(target: "my_target", key1 = 42, key2 = true; "a {} event", "log")
+    // info!(target: "my_target", "a {} event", "log")
+    (target: $target:expr, $($arg:tt)+) => (log!(target: $target, $crate::Level::Info, $($arg)+));
+
+    // info!("a {} event", "log")
+    ($($arg:tt)+) => (log!($crate::Level::Info, $($arg)+))
+}
+
+/// Logs a message at the debug level.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::debug;
+///
+/// # fn main() {
+/// # struct Position { x: f32, y: f32 }
+/// let pos = Position { x: 3.234, y: -1.223 };
+///
+/// debug!("New position: x: {}, y: {}", pos.x, pos.y);
+/// debug!(target: "app_events", "New position: x: {}, y: {}", pos.x, pos.y);
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! debug {
+    // debug!(target: "my_target", key1 = 42, key2 = true; "a {} event", "log")
+    // debug!(target: "my_target", "a {} event", "log")
+    (target: $target:expr, $($arg:tt)+) => (log!(target: $target, $crate::Level::Debug, $($arg)+));
+
+    // debug!("a {} event", "log")
+    ($($arg:tt)+) => (log!($crate::Level::Debug, $($arg)+))
+}
+
+/// Logs a message at the trace level.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::trace;
+///
+/// # fn main() {
+/// # struct Position { x: f32, y: f32 }
+/// let pos = Position { x: 3.234, y: -1.223 };
+///
+/// trace!("Position is: x: {}, y: {}", pos.x, pos.y);
+/// trace!(target: "app_events", "x is {} and y is {}",
+///        if pos.x >= 0.0 { "positive" } else { "negative" },
+///        if pos.y >= 0.0 { "positive" } else { "negative" });
+/// # }
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! trace {
+    // trace!(target: "my_target", key1 = 42, key2 = true; "a {} event", "log")
+    // trace!(target: "my_target", "a {} event", "log")
+    (target: $target:expr, $($arg:tt)+) => (log!(target: $target, $crate::Level::Trace, $($arg)+));
+
+    // trace!("a {} event", "log")
+    ($($arg:tt)+) => (log!($crate::Level::Trace, $($arg)+))
+}
+
+/// Determines if a message logged at the specified level in that module will
+/// be logged.
+///
+/// This can be used to avoid expensive computation of log message arguments if
+/// the message would be ignored anyway.
+///
+/// # Examples
+///
+/// ```edition2018
+/// use log::Level::Debug;
+/// use log::{debug, log_enabled};
+///
+/// # fn foo() {
+/// if log_enabled!(Debug) {
+///     let data = expensive_call();
+///     debug!("expensive debug data: {} {}", data.x, data.y);
+/// }
+/// if log_enabled!(target: "Global", Debug) {
+///    let data = expensive_call();
+///    debug!(target: "Global", "expensive debug data: {} {}", data.x, data.y);
+/// }
+/// # }
+/// # struct Data { x: u32, y: u32 }
+/// # fn expensive_call() -> Data { Data { x: 0, y: 0 } }
+/// # fn main() {}
+/// ```
+#[macro_export(local_inner_macros)]
+macro_rules! log_enabled {
+    (target: $target:expr, $lvl:expr) => {{
+        let lvl = $lvl;
+        lvl <= $crate::STATIC_MAX_LEVEL
+            && lvl <= $crate::max_level()
+            && $crate::__private_api_enabled(lvl, $target)
+    }};
+    ($lvl:expr) => {
+        log_enabled!(target: __log_module_path!(), $lvl)
+    };
+}
+
+// The log macro above cannot invoke format_args directly because it uses
+// local_inner_macros. A format_args invocation there would resolve to
+// $crate::format_args which does not exist. Instead invoke format_args here
+// outside of local_inner_macros so that it resolves (probably) to
+// core::format_args or std::format_args. Same for the several macros that
+// follow.
+//
+// This is a workaround until we drop support for pre-1.30 compilers. At that
+// point we can remove use of local_inner_macros, use $crate:: when invoking
+// local macros, and invoke format_args directly.
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __log_format_args {
+    ($($args:tt)*) => {
+        format_args!($($args)*)
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __log_module_path {
+    () => {
+        module_path!()
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __log_file {
+    () => {
+        file!()
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __log_line {
+    () => {
+        line!()
+    };
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! __log_key {
+    // key1 = 42
+    ($($args:ident)*) => {
+        stringify!($($args)*)
+    };
+    // "key1" = 42
+    ($($args:expr)*) => {
+        $($args)*
+    };
+}

zeroidc/vendor/log/src/serde.rs

@@ -0,0 +1,400 @@
+#![cfg(feature = "serde")]
+
+extern crate serde;
+use self::serde::de::{
+    Deserialize, DeserializeSeed, Deserializer, EnumAccess, Error, Unexpected, VariantAccess,
+    Visitor,
+};
+use self::serde::ser::{Serialize, Serializer};
+
+use {Level, LevelFilter, LOG_LEVEL_NAMES};
+
+use std::fmt;
+use std::str::{self, FromStr};
+
+// The Deserialize impls are handwritten to be case insensitive using FromStr.
+
+impl Serialize for Level {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match *self {
+            Level::Error => serializer.serialize_unit_variant("Level", 0, "ERROR"),
+            Level::Warn => serializer.serialize_unit_variant("Level", 1, "WARN"),
+            Level::Info => serializer.serialize_unit_variant("Level", 2, "INFO"),
+            Level::Debug => serializer.serialize_unit_variant("Level", 3, "DEBUG"),
+            Level::Trace => serializer.serialize_unit_variant("Level", 4, "TRACE"),
+        }
+    }
+}
+
+impl<'de> Deserialize<'de> for Level {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        struct LevelIdentifier;
+
+        impl<'de> Visitor<'de> for LevelIdentifier {
+            type Value = Level;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("log level")
+            }
+
+            fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                // Case insensitive.
+                FromStr::from_str(s).map_err(|_| Error::unknown_variant(s, &LOG_LEVEL_NAMES[1..]))
+            }
+
+            fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                let variant = str::from_utf8(value)
+                    .map_err(|_| Error::invalid_value(Unexpected::Bytes(value), &self))?;
+
+                self.visit_str(variant)
+            }
+
+            fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                let variant = LOG_LEVEL_NAMES[1..]
+                    .get(v as usize)
+                    .ok_or_else(|| Error::invalid_value(Unexpected::Unsigned(v), &self))?;
+
+                self.visit_str(variant)
+            }
+        }
+
+        impl<'de> DeserializeSeed<'de> for LevelIdentifier {
+            type Value = Level;
+
+            fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+            where
+                D: Deserializer<'de>,
+            {
+                deserializer.deserialize_identifier(LevelIdentifier)
+            }
+        }
+
+        struct LevelEnum;
+
+        impl<'de> Visitor<'de> for LevelEnum {
+            type Value = Level;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("log level")
+            }
+
+            fn visit_enum<A>(self, value: A) -> Result<Self::Value, A::Error>
+            where
+                A: EnumAccess<'de>,
+            {
+                let (level, variant) = value.variant_seed(LevelIdentifier)?;
+                // Every variant is a unit variant.
+                variant.unit_variant()?;
+                Ok(level)
+            }
+        }
+
+        deserializer.deserialize_enum("Level", &LOG_LEVEL_NAMES[1..], LevelEnum)
+    }
+}
+
+impl Serialize for LevelFilter {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match *self {
+            LevelFilter::Off => serializer.serialize_unit_variant("LevelFilter", 0, "OFF"),
+            LevelFilter::Error => serializer.serialize_unit_variant("LevelFilter", 1, "ERROR"),
+            LevelFilter::Warn => serializer.serialize_unit_variant("LevelFilter", 2, "WARN"),
+            LevelFilter::Info => serializer.serialize_unit_variant("LevelFilter", 3, "INFO"),
+            LevelFilter::Debug => serializer.serialize_unit_variant("LevelFilter", 4, "DEBUG"),
+            LevelFilter::Trace => serializer.serialize_unit_variant("LevelFilter", 5, "TRACE"),
+        }
+    }
+}
+
+impl<'de> Deserialize<'de> for LevelFilter {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        struct LevelFilterIdentifier;
+
+        impl<'de> Visitor<'de> for LevelFilterIdentifier {
+            type Value = LevelFilter;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("log level filter")
+            }
+
+            fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                // Case insensitive.
+                FromStr::from_str(s).map_err(|_| Error::unknown_variant(s, &LOG_LEVEL_NAMES))
+            }
+
+            fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                let variant = str::from_utf8(value)
+                    .map_err(|_| Error::invalid_value(Unexpected::Bytes(value), &self))?;
+
+                self.visit_str(variant)
+            }
+
+            fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
+            where
+                E: Error,
+            {
+                let variant = LOG_LEVEL_NAMES
+                    .get(v as usize)
+                    .ok_or_else(|| Error::invalid_value(Unexpected::Unsigned(v), &self))?;
+
+                self.visit_str(variant)
+            }
+        }
+
+        impl<'de> DeserializeSeed<'de> for LevelFilterIdentifier {
+            type Value = LevelFilter;
+
+            fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
+            where
+                D: Deserializer<'de>,
+            {
+                deserializer.deserialize_identifier(LevelFilterIdentifier)
+            }
+        }
+
+        struct LevelFilterEnum;
+
+        impl<'de> Visitor<'de> for LevelFilterEnum {
+            type Value = LevelFilter;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("log level filter")
+            }
+
+            fn visit_enum<A>(self, value: A) -> Result<Self::Value, A::Error>
+            where
+                A: EnumAccess<'de>,
+            {
+                let (level_filter, variant) = value.variant_seed(LevelFilterIdentifier)?;
+                // Every variant is a unit variant.
+                variant.unit_variant()?;
+                Ok(level_filter)
+            }
+        }
+
+        deserializer.deserialize_enum("LevelFilter", &LOG_LEVEL_NAMES, LevelFilterEnum)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    extern crate serde_test;
+    use self::serde_test::{assert_de_tokens, assert_de_tokens_error, assert_tokens, Token};
+
+    use {Level, LevelFilter};
+
+    fn level_token(variant: &'static str) -> Token {
+        Token::UnitVariant {
+            name: "Level",
+            variant: variant,
+        }
+    }
+
+    fn level_bytes_tokens(variant: &'static [u8]) -> [Token; 3] {
+        [
+            Token::Enum { name: "Level" },
+            Token::Bytes(variant),
+            Token::Unit,
+        ]
+    }
+
+    fn level_variant_tokens(variant: u32) -> [Token; 3] {
+        [
+            Token::Enum { name: "Level" },
+            Token::U32(variant),
+            Token::Unit,
+        ]
+    }
+
+    fn level_filter_token(variant: &'static str) -> Token {
+        Token::UnitVariant {
+            name: "LevelFilter",
+            variant: variant,
+        }
+    }
+
+    fn level_filter_bytes_tokens(variant: &'static [u8]) -> [Token; 3] {
+        [
+            Token::Enum {
+                name: "LevelFilter",
+            },
+            Token::Bytes(variant),
+            Token::Unit,
+        ]
+    }
+
+    fn level_filter_variant_tokens(variant: u32) -> [Token; 3] {
+        [
+            Token::Enum {
+                name: "LevelFilter",
+            },
+            Token::U32(variant),
+            Token::Unit,
+        ]
+    }
+
+    #[test]
+    fn test_level_ser_de() {
+        let cases = [
+            (Level::Error, [level_token("ERROR")]),
+            (Level::Warn, [level_token("WARN")]),
+            (Level::Info, [level_token("INFO")]),
+            (Level::Debug, [level_token("DEBUG")]),
+            (Level::Trace, [level_token("TRACE")]),
+        ];
+
+        for &(s, expected) in &cases {
+            assert_tokens(&s, &expected);
+        }
+    }
+
+    #[test]
+    fn test_level_case_insensitive() {
+        let cases = [
+            (Level::Error, [level_token("error")]),
+            (Level::Warn, [level_token("warn")]),
+            (Level::Info, [level_token("info")]),
+            (Level::Debug, [level_token("debug")]),
+            (Level::Trace, [level_token("trace")]),
+        ];
+
+        for &(s, expected) in &cases {
+            assert_de_tokens(&s, &expected);
+        }
+    }
+
+    #[test]
+    fn test_level_de_bytes() {
+        let cases = [
+            (Level::Error, level_bytes_tokens(b"ERROR")),
+            (Level::Warn, level_bytes_tokens(b"WARN")),
+            (Level::Info, level_bytes_tokens(b"INFO")),
+            (Level::Debug, level_bytes_tokens(b"DEBUG")),
+            (Level::Trace, level_bytes_tokens(b"TRACE")),
+        ];
+
+        for &(value, tokens) in &cases {
+            assert_de_tokens(&value, &tokens);
+        }
+    }
+
+    #[test]
+    fn test_level_de_variant_index() {
+        let cases = [
+            (Level::Error, level_variant_tokens(0)),
+            (Level::Warn, level_variant_tokens(1)),
+            (Level::Info, level_variant_tokens(2)),
+            (Level::Debug, level_variant_tokens(3)),
+            (Level::Trace, level_variant_tokens(4)),
+        ];
+
+        for &(value, tokens) in &cases {
+            assert_de_tokens(&value, &tokens);
+        }
+    }
+
+    #[test]
+    fn test_level_de_error() {
+        let msg = "unknown variant `errorx`, expected one of \
+                   `ERROR`, `WARN`, `INFO`, `DEBUG`, `TRACE`";
+        assert_de_tokens_error::<Level>(&[level_token("errorx")], msg);
+    }
+
+    #[test]
+    fn test_level_filter_ser_de() {
+        let cases = [
+            (LevelFilter::Off, [level_filter_token("OFF")]),
+            (LevelFilter::Error, [level_filter_token("ERROR")]),
+            (LevelFilter::Warn, [level_filter_token("WARN")]),
+            (LevelFilter::Info, [level_filter_token("INFO")]),
+            (LevelFilter::Debug, [level_filter_token("DEBUG")]),
+            (LevelFilter::Trace, [level_filter_token("TRACE")]),
+        ];
+
+        for &(s, expected) in &cases {
+            assert_tokens(&s, &expected);
+        }
+    }
+
+    #[test]
+    fn test_level_filter_case_insensitive() {
+        let cases = [
+            (LevelFilter::Off, [level_filter_token("off")]),
+            (LevelFilter::Error, [level_filter_token("error")]),
+            (LevelFilter::Warn, [level_filter_token("warn")]),
+            (LevelFilter::Info, [level_filter_token("info")]),
+            (LevelFilter::Debug, [level_filter_token("debug")]),
+            (LevelFilter::Trace, [level_filter_token("trace")]),
+        ];
+
+        for &(s, expected) in &cases {
+            assert_de_tokens(&s, &expected);
+        }
+    }
+
+    #[test]
+    fn test_level_filter_de_bytes() {
+        let cases = [
+            (LevelFilter::Off, level_filter_bytes_tokens(b"OFF")),
+            (LevelFilter::Error, level_filter_bytes_tokens(b"ERROR")),
+            (LevelFilter::Warn, level_filter_bytes_tokens(b"WARN")),
+            (LevelFilter::Info, level_filter_bytes_tokens(b"INFO")),
+            (LevelFilter::Debug, level_filter_bytes_tokens(b"DEBUG")),
+            (LevelFilter::Trace, level_filter_bytes_tokens(b"TRACE")),
+        ];
+
+        for &(value, tokens) in &cases {
+            assert_de_tokens(&value, &tokens);
+        }
+    }
+
+    #[test]
+    fn test_level_filter_de_variant_index() {
+        let cases = [
+            (LevelFilter::Off, level_filter_variant_tokens(0)),
+            (LevelFilter::Error, level_filter_variant_tokens(1)),
+            (LevelFilter::Warn, level_filter_variant_tokens(2)),
+            (LevelFilter::Info, level_filter_variant_tokens(3)),
+            (LevelFilter::Debug, level_filter_variant_tokens(4)),
+            (LevelFilter::Trace, level_filter_variant_tokens(5)),
+        ];
+
+        for &(value, tokens) in &cases {
+            assert_de_tokens(&value, &tokens);
+        }
+    }
+
+    #[test]
+    fn test_level_filter_de_error() {
+        let msg = "unknown variant `errorx`, expected one of \
+                   `OFF`, `ERROR`, `WARN`, `INFO`, `DEBUG`, `TRACE`";
+        assert_de_tokens_error::<LevelFilter>(&[level_filter_token("errorx")], msg);
+    }
+}