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Diffstat (limited to 'third_party/rust/serde_json/src/map.rs')
| -rw-r--r-- | third_party/rust/serde_json/src/map.rs | 940 |
1 files changed, 940 insertions, 0 deletions
diff --git a/third_party/rust/serde_json/src/map.rs b/third_party/rust/serde_json/src/map.rs new file mode 100644 index 0000000000..3e8a3814c9 --- /dev/null +++ b/third_party/rust/serde_json/src/map.rs @@ -0,0 +1,940 @@ +//! A map of String to serde_json::Value. +//! +//! By default the map is backed by a [`BTreeMap`]. Enable the `preserve_order` +//! feature of serde_json to use [`IndexMap`] instead. +//! +//! [`BTreeMap`]: https://doc.rust-lang.org/std/collections/struct.BTreeMap.html +//! [`IndexMap`]: https://docs.rs/indexmap/*/indexmap/map/struct.IndexMap.html + +use crate::value::Value; +use alloc::string::String; +use core::borrow::Borrow; +use core::fmt::{self, Debug}; +use core::hash::Hash; +use core::iter::{FromIterator, FusedIterator}; +#[cfg(feature = "preserve_order")] +use core::mem; +use core::ops; +use serde::de; + +#[cfg(not(feature = "preserve_order"))] +use alloc::collections::{btree_map, BTreeMap}; +#[cfg(feature = "preserve_order")] +use indexmap::{self, IndexMap}; + +/// Represents a JSON key/value type. +pub struct Map<K, V> { + map: MapImpl<K, V>, +} + +#[cfg(not(feature = "preserve_order"))] +type MapImpl<K, V> = BTreeMap<K, V>; +#[cfg(feature = "preserve_order")] +type MapImpl<K, V> = IndexMap<K, V>; + +impl Map<String, Value> { + /// Makes a new empty Map. + #[inline] + pub fn new() -> Self { + Map { + map: MapImpl::new(), + } + } + + /// Makes a new empty Map with the given initial capacity. + #[inline] + pub fn with_capacity(capacity: usize) -> Self { + Map { + #[cfg(not(feature = "preserve_order"))] + map: { + // does not support with_capacity + let _ = capacity; + BTreeMap::new() + }, + #[cfg(feature = "preserve_order")] + map: IndexMap::with_capacity(capacity), + } + } + + /// Clears the map, removing all values. + #[inline] + pub fn clear(&mut self) { + self.map.clear(); + } + + /// Returns a reference to the value corresponding to the key. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + #[inline] + pub fn get<Q>(&self, key: &Q) -> Option<&Value> + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + self.map.get(key) + } + + /// Returns true if the map contains a value for the specified key. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + #[inline] + pub fn contains_key<Q>(&self, key: &Q) -> bool + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + self.map.contains_key(key) + } + + /// Returns a mutable reference to the value corresponding to the key. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + #[inline] + pub fn get_mut<Q>(&mut self, key: &Q) -> Option<&mut Value> + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + self.map.get_mut(key) + } + + /// Returns the key-value pair matching the given key. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + #[inline] + #[cfg(any(feature = "preserve_order", not(no_btreemap_get_key_value)))] + pub fn get_key_value<Q>(&self, key: &Q) -> Option<(&String, &Value)> + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + self.map.get_key_value(key) + } + + /// Inserts a key-value pair into the map. + /// + /// If the map did not have this key present, `None` is returned. + /// + /// If the map did have this key present, the value is updated, and the old + /// value is returned. + #[inline] + pub fn insert(&mut self, k: String, v: Value) -> Option<Value> { + self.map.insert(k, v) + } + + /// Removes a key from the map, returning the value at the key if the key + /// was previously in the map. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + #[inline] + pub fn remove<Q>(&mut self, key: &Q) -> Option<Value> + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + #[cfg(feature = "preserve_order")] + return self.map.swap_remove(key); + #[cfg(not(feature = "preserve_order"))] + return self.map.remove(key); + } + + /// Removes a key from the map, returning the stored key and value if the + /// key was previously in the map. + /// + /// The key may be any borrowed form of the map's key type, but the ordering + /// on the borrowed form *must* match the ordering on the key type. + pub fn remove_entry<Q>(&mut self, key: &Q) -> Option<(String, Value)> + where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, + { + #[cfg(any(feature = "preserve_order", not(no_btreemap_remove_entry)))] + return self.map.remove_entry(key); + #[cfg(all( + not(feature = "preserve_order"), + no_btreemap_remove_entry, + not(no_btreemap_get_key_value), + ))] + { + let (key, _value) = self.map.get_key_value(key)?; + let key = key.clone(); + let value = self.map.remove::<String>(&key)?; + Some((key, value)) + } + #[cfg(all( + not(feature = "preserve_order"), + no_btreemap_remove_entry, + no_btreemap_get_key_value, + ))] + { + use core::ops::{Bound, RangeBounds}; + + struct Key<'a, Q: ?Sized>(&'a Q); + + impl<'a, Q: ?Sized> RangeBounds<Q> for Key<'a, Q> { + fn start_bound(&self) -> Bound<&Q> { + Bound::Included(self.0) + } + fn end_bound(&self) -> Bound<&Q> { + Bound::Included(self.0) + } + } + + let mut range = self.map.range(Key(key)); + let (key, _value) = range.next()?; + let key = key.clone(); + let value = self.map.remove::<String>(&key)?; + Some((key, value)) + } + } + + /// Moves all elements from other into self, leaving other empty. + #[inline] + pub fn append(&mut self, other: &mut Self) { + #[cfg(feature = "preserve_order")] + self.map + .extend(mem::replace(&mut other.map, MapImpl::default())); + #[cfg(not(feature = "preserve_order"))] + self.map.append(&mut other.map); + } + + /// Gets the given key's corresponding entry in the map for in-place + /// manipulation. + pub fn entry<S>(&mut self, key: S) -> Entry + where + S: Into<String>, + { + #[cfg(not(feature = "preserve_order"))] + use alloc::collections::btree_map::Entry as EntryImpl; + #[cfg(feature = "preserve_order")] + use indexmap::map::Entry as EntryImpl; + + match self.map.entry(key.into()) { + EntryImpl::Vacant(vacant) => Entry::Vacant(VacantEntry { vacant }), + EntryImpl::Occupied(occupied) => Entry::Occupied(OccupiedEntry { occupied }), + } + } + + /// Returns the number of elements in the map. + #[inline] + pub fn len(&self) -> usize { + self.map.len() + } + + /// Returns true if the map contains no elements. + #[inline] + pub fn is_empty(&self) -> bool { + self.map.is_empty() + } + + /// Gets an iterator over the entries of the map. + #[inline] + pub fn iter(&self) -> Iter { + Iter { + iter: self.map.iter(), + } + } + + /// Gets a mutable iterator over the entries of the map. + #[inline] + pub fn iter_mut(&mut self) -> IterMut { + IterMut { + iter: self.map.iter_mut(), + } + } + + /// Gets an iterator over the keys of the map. + #[inline] + pub fn keys(&self) -> Keys { + Keys { + iter: self.map.keys(), + } + } + + /// Gets an iterator over the values of the map. + #[inline] + pub fn values(&self) -> Values { + Values { + iter: self.map.values(), + } + } + + /// Gets an iterator over mutable values of the map. + #[inline] + pub fn values_mut(&mut self) -> ValuesMut { + ValuesMut { + iter: self.map.values_mut(), + } + } + + /// Retains only the elements specified by the predicate. + /// + /// In other words, remove all pairs `(k, v)` such that `f(&k, &mut v)` + /// returns `false`. + #[cfg(not(no_btreemap_retain))] + #[inline] + pub fn retain<F>(&mut self, f: F) + where + F: FnMut(&String, &mut Value) -> bool, + { + self.map.retain(f); + } +} + +#[allow(clippy::derivable_impls)] // clippy bug: https://github.com/rust-lang/rust-clippy/issues/7655 +impl Default for Map<String, Value> { + #[inline] + fn default() -> Self { + Map { + map: MapImpl::new(), + } + } +} + +impl Clone for Map<String, Value> { + #[inline] + fn clone(&self) -> Self { + Map { + map: self.map.clone(), + } + } + + #[inline] + fn clone_from(&mut self, source: &Self) { + self.map.clone_from(&source.map); + } +} + +impl PartialEq for Map<String, Value> { + #[inline] + fn eq(&self, other: &Self) -> bool { + self.map.eq(&other.map) + } +} + +impl Eq for Map<String, Value> {} + +/// Access an element of this map. Panics if the given key is not present in the +/// map. +/// +/// ``` +/// # use serde_json::Value; +/// # +/// # let val = &Value::String("".to_owned()); +/// # let _ = +/// match val { +/// Value::String(s) => Some(s.as_str()), +/// Value::Array(arr) => arr[0].as_str(), +/// Value::Object(map) => map["type"].as_str(), +/// _ => None, +/// } +/// # ; +/// ``` +impl<'a, Q> ops::Index<&'a Q> for Map<String, Value> +where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, +{ + type Output = Value; + + fn index(&self, index: &Q) -> &Value { + self.map.index(index) + } +} + +/// Mutably access an element of this map. Panics if the given key is not +/// present in the map. +/// +/// ``` +/// # use serde_json::json; +/// # +/// # let mut map = serde_json::Map::new(); +/// # map.insert("key".to_owned(), serde_json::Value::Null); +/// # +/// map["key"] = json!("value"); +/// ``` +impl<'a, Q> ops::IndexMut<&'a Q> for Map<String, Value> +where + String: Borrow<Q>, + Q: ?Sized + Ord + Eq + Hash, +{ + fn index_mut(&mut self, index: &Q) -> &mut Value { + self.map.get_mut(index).expect("no entry found for key") + } +} + +impl Debug for Map<String, Value> { + #[inline] + fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> { + self.map.fmt(formatter) + } +} + +#[cfg(any(feature = "std", feature = "alloc"))] +impl serde::ser::Serialize for Map<String, Value> { + #[inline] + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: serde::ser::Serializer, + { + use serde::ser::SerializeMap; + let mut map = tri!(serializer.serialize_map(Some(self.len()))); + for (k, v) in self { + tri!(map.serialize_entry(k, v)); + } + map.end() + } +} + +impl<'de> de::Deserialize<'de> for Map<String, Value> { + #[inline] + fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> + where + D: de::Deserializer<'de>, + { + struct Visitor; + + impl<'de> de::Visitor<'de> for Visitor { + type Value = Map<String, Value>; + + fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + formatter.write_str("a map") + } + + #[inline] + fn visit_unit<E>(self) -> Result<Self::Value, E> + where + E: de::Error, + { + Ok(Map::new()) + } + + #[cfg(any(feature = "std", feature = "alloc"))] + #[inline] + fn visit_map<V>(self, mut visitor: V) -> Result<Self::Value, V::Error> + where + V: de::MapAccess<'de>, + { + let mut values = Map::new(); + + while let Some((key, value)) = tri!(visitor.next_entry()) { + values.insert(key, value); + } + + Ok(values) + } + } + + deserializer.deserialize_map(Visitor) + } +} + +impl FromIterator<(String, Value)> for Map<String, Value> { + fn from_iter<T>(iter: T) -> Self + where + T: IntoIterator<Item = (String, Value)>, + { + Map { + map: FromIterator::from_iter(iter), + } + } +} + +impl Extend<(String, Value)> for Map<String, Value> { + fn extend<T>(&mut self, iter: T) + where + T: IntoIterator<Item = (String, Value)>, + { + self.map.extend(iter); + } +} + +macro_rules! delegate_iterator { + (($name:ident $($generics:tt)*) => $item:ty) => { + impl $($generics)* Iterator for $name $($generics)* { + type Item = $item; + #[inline] + fn next(&mut self) -> Option<Self::Item> { + self.iter.next() + } + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } + } + + impl $($generics)* DoubleEndedIterator for $name $($generics)* { + #[inline] + fn next_back(&mut self) -> Option<Self::Item> { + self.iter.next_back() + } + } + + impl $($generics)* ExactSizeIterator for $name $($generics)* { + #[inline] + fn len(&self) -> usize { + self.iter.len() + } + } + + impl $($generics)* FusedIterator for $name $($generics)* {} + } +} + +////////////////////////////////////////////////////////////////////////////// + +/// A view into a single entry in a map, which may either be vacant or occupied. +/// This enum is constructed from the [`entry`] method on [`Map`]. +/// +/// [`entry`]: struct.Map.html#method.entry +/// [`Map`]: struct.Map.html +pub enum Entry<'a> { + /// A vacant Entry. + Vacant(VacantEntry<'a>), + /// An occupied Entry. + Occupied(OccupiedEntry<'a>), +} + +/// A vacant Entry. It is part of the [`Entry`] enum. +/// +/// [`Entry`]: enum.Entry.html +pub struct VacantEntry<'a> { + vacant: VacantEntryImpl<'a>, +} + +/// An occupied Entry. It is part of the [`Entry`] enum. +/// +/// [`Entry`]: enum.Entry.html +pub struct OccupiedEntry<'a> { + occupied: OccupiedEntryImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type VacantEntryImpl<'a> = btree_map::VacantEntry<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type VacantEntryImpl<'a> = indexmap::map::VacantEntry<'a, String, Value>; + +#[cfg(not(feature = "preserve_order"))] +type OccupiedEntryImpl<'a> = btree_map::OccupiedEntry<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type OccupiedEntryImpl<'a> = indexmap::map::OccupiedEntry<'a, String, Value>; + +impl<'a> Entry<'a> { + /// Returns a reference to this entry's key. + /// + /// # Examples + /// + /// ``` + /// let mut map = serde_json::Map::new(); + /// assert_eq!(map.entry("serde").key(), &"serde"); + /// ``` + pub fn key(&self) -> &String { + match self { + Entry::Vacant(e) => e.key(), + Entry::Occupied(e) => e.key(), + } + } + + /// Ensures a value is in the entry by inserting the default if empty, and + /// returns a mutable reference to the value in the entry. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// let mut map = serde_json::Map::new(); + /// map.entry("serde").or_insert(json!(12)); + /// + /// assert_eq!(map["serde"], 12); + /// ``` + pub fn or_insert(self, default: Value) -> &'a mut Value { + match self { + Entry::Vacant(entry) => entry.insert(default), + Entry::Occupied(entry) => entry.into_mut(), + } + } + + /// Ensures a value is in the entry by inserting the result of the default + /// function if empty, and returns a mutable reference to the value in the + /// entry. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// let mut map = serde_json::Map::new(); + /// map.entry("serde").or_insert_with(|| json!("hoho")); + /// + /// assert_eq!(map["serde"], "hoho".to_owned()); + /// ``` + pub fn or_insert_with<F>(self, default: F) -> &'a mut Value + where + F: FnOnce() -> Value, + { + match self { + Entry::Vacant(entry) => entry.insert(default()), + Entry::Occupied(entry) => entry.into_mut(), + } + } + + /// Provides in-place mutable access to an occupied entry before any + /// potential inserts into the map. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// let mut map = serde_json::Map::new(); + /// map.entry("serde") + /// .and_modify(|e| *e = json!("rust")) + /// .or_insert(json!("cpp")); + /// + /// assert_eq!(map["serde"], "cpp"); + /// + /// map.entry("serde") + /// .and_modify(|e| *e = json!("rust")) + /// .or_insert(json!("cpp")); + /// + /// assert_eq!(map["serde"], "rust"); + /// ``` + pub fn and_modify<F>(self, f: F) -> Self + where + F: FnOnce(&mut Value), + { + match self { + Entry::Occupied(mut entry) => { + f(entry.get_mut()); + Entry::Occupied(entry) + } + Entry::Vacant(entry) => Entry::Vacant(entry), + } + } +} + +impl<'a> VacantEntry<'a> { + /// Gets a reference to the key that would be used when inserting a value + /// through the VacantEntry. + /// + /// # Examples + /// + /// ``` + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// + /// match map.entry("serde") { + /// Entry::Vacant(vacant) => { + /// assert_eq!(vacant.key(), &"serde"); + /// } + /// Entry::Occupied(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn key(&self) -> &String { + self.vacant.key() + } + + /// Sets the value of the entry with the VacantEntry's key, and returns a + /// mutable reference to it. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// + /// match map.entry("serde") { + /// Entry::Vacant(vacant) => { + /// vacant.insert(json!("hoho")); + /// } + /// Entry::Occupied(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn insert(self, value: Value) -> &'a mut Value { + self.vacant.insert(value) + } +} + +impl<'a> OccupiedEntry<'a> { + /// Gets a reference to the key in the entry. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!(12)); + /// + /// match map.entry("serde") { + /// Entry::Occupied(occupied) => { + /// assert_eq!(occupied.key(), &"serde"); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn key(&self) -> &String { + self.occupied.key() + } + + /// Gets a reference to the value in the entry. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!(12)); + /// + /// match map.entry("serde") { + /// Entry::Occupied(occupied) => { + /// assert_eq!(occupied.get(), 12); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn get(&self) -> &Value { + self.occupied.get() + } + + /// Gets a mutable reference to the value in the entry. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!([1, 2, 3])); + /// + /// match map.entry("serde") { + /// Entry::Occupied(mut occupied) => { + /// occupied.get_mut().as_array_mut().unwrap().push(json!(4)); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// + /// assert_eq!(map["serde"].as_array().unwrap().len(), 4); + /// ``` + #[inline] + pub fn get_mut(&mut self) -> &mut Value { + self.occupied.get_mut() + } + + /// Converts the entry into a mutable reference to its value. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!([1, 2, 3])); + /// + /// match map.entry("serde") { + /// Entry::Occupied(mut occupied) => { + /// occupied.into_mut().as_array_mut().unwrap().push(json!(4)); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// + /// assert_eq!(map["serde"].as_array().unwrap().len(), 4); + /// ``` + #[inline] + pub fn into_mut(self) -> &'a mut Value { + self.occupied.into_mut() + } + + /// Sets the value of the entry with the `OccupiedEntry`'s key, and returns + /// the entry's old value. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!(12)); + /// + /// match map.entry("serde") { + /// Entry::Occupied(mut occupied) => { + /// assert_eq!(occupied.insert(json!(13)), 12); + /// assert_eq!(occupied.get(), 13); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn insert(&mut self, value: Value) -> Value { + self.occupied.insert(value) + } + + /// Takes the value of the entry out of the map, and returns it. + /// + /// # Examples + /// + /// ``` + /// # use serde_json::json; + /// # + /// use serde_json::map::Entry; + /// + /// let mut map = serde_json::Map::new(); + /// map.insert("serde".to_owned(), json!(12)); + /// + /// match map.entry("serde") { + /// Entry::Occupied(occupied) => { + /// assert_eq!(occupied.remove(), 12); + /// } + /// Entry::Vacant(_) => unimplemented!(), + /// } + /// ``` + #[inline] + pub fn remove(self) -> Value { + #[cfg(feature = "preserve_order")] + return self.occupied.swap_remove(); + #[cfg(not(feature = "preserve_order"))] + return self.occupied.remove(); + } +} + +////////////////////////////////////////////////////////////////////////////// + +impl<'a> IntoIterator for &'a Map<String, Value> { + type Item = (&'a String, &'a Value); + type IntoIter = Iter<'a>; + #[inline] + fn into_iter(self) -> Self::IntoIter { + Iter { + iter: self.map.iter(), + } + } +} + +/// An iterator over a serde_json::Map's entries. +pub struct Iter<'a> { + iter: IterImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type IterImpl<'a> = btree_map::Iter<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type IterImpl<'a> = indexmap::map::Iter<'a, String, Value>; + +delegate_iterator!((Iter<'a>) => (&'a String, &'a Value)); + +////////////////////////////////////////////////////////////////////////////// + +impl<'a> IntoIterator for &'a mut Map<String, Value> { + type Item = (&'a String, &'a mut Value); + type IntoIter = IterMut<'a>; + #[inline] + fn into_iter(self) -> Self::IntoIter { + IterMut { + iter: self.map.iter_mut(), + } + } +} + +/// A mutable iterator over a serde_json::Map's entries. +pub struct IterMut<'a> { + iter: IterMutImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type IterMutImpl<'a> = btree_map::IterMut<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type IterMutImpl<'a> = indexmap::map::IterMut<'a, String, Value>; + +delegate_iterator!((IterMut<'a>) => (&'a String, &'a mut Value)); + +////////////////////////////////////////////////////////////////////////////// + +impl IntoIterator for Map<String, Value> { + type Item = (String, Value); + type IntoIter = IntoIter; + #[inline] + fn into_iter(self) -> Self::IntoIter { + IntoIter { + iter: self.map.into_iter(), + } + } +} + +/// An owning iterator over a serde_json::Map's entries. +pub struct IntoIter { + iter: IntoIterImpl, +} + +#[cfg(not(feature = "preserve_order"))] +type IntoIterImpl = btree_map::IntoIter<String, Value>; +#[cfg(feature = "preserve_order")] +type IntoIterImpl = indexmap::map::IntoIter<String, Value>; + +delegate_iterator!((IntoIter) => (String, Value)); + +////////////////////////////////////////////////////////////////////////////// + +/// An iterator over a serde_json::Map's keys. +pub struct Keys<'a> { + iter: KeysImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type KeysImpl<'a> = btree_map::Keys<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type KeysImpl<'a> = indexmap::map::Keys<'a, String, Value>; + +delegate_iterator!((Keys<'a>) => &'a String); + +////////////////////////////////////////////////////////////////////////////// + +/// An iterator over a serde_json::Map's values. +pub struct Values<'a> { + iter: ValuesImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type ValuesImpl<'a> = btree_map::Values<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type ValuesImpl<'a> = indexmap::map::Values<'a, String, Value>; + +delegate_iterator!((Values<'a>) => &'a Value); + +////////////////////////////////////////////////////////////////////////////// + +/// A mutable iterator over a serde_json::Map's values. +pub struct ValuesMut<'a> { + iter: ValuesMutImpl<'a>, +} + +#[cfg(not(feature = "preserve_order"))] +type ValuesMutImpl<'a> = btree_map::ValuesMut<'a, String, Value>; +#[cfg(feature = "preserve_order")] +type ValuesMutImpl<'a> = indexmap::map::ValuesMut<'a, String, Value>; + +delegate_iterator!((ValuesMut<'a>) => &'a mut Value); |