use serde::de::{Deserialize, Deserializer, MapAccess, SeqAccess, Visitor};
use serde::ser::{Serialize, SerializeMap, SerializeSeq, Serializer};
use std::fmt;
use std::hash::{BuildHasher, Hash};
use std::marker::PhantomData;
use crate::hashmap::HashMap;
use crate::hashset::HashSet;
use crate::ordmap::OrdMap;
use crate::ordset::OrdSet;
use crate::vector::Vector;
struct SeqVisitor<'de, S, A> {
phantom_s: PhantomData<S>,
phantom_a: PhantomData<A>,
phantom_lifetime: PhantomData<&'de ()>,
}
impl<'de, S, A> SeqVisitor<'de, S, A> {
pub(crate) fn new() -> SeqVisitor<'de, S, A> {
SeqVisitor {
phantom_s: PhantomData,
phantom_a: PhantomData,
phantom_lifetime: PhantomData,
}
}
}
impl<'de, S, A> Visitor<'de> for SeqVisitor<'de, S, A>
where
S: From<Vec<A>>,
A: Deserialize<'de>,
{
type Value = S;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("a sequence")
}
fn visit_seq<Access>(self, mut access: Access) -> Result<Self::Value, Access::Error>
where
Access: SeqAccess<'de>,
{
let mut v: Vec<A> = match access.size_hint() {
None => Vec::new(),
Some(l) => Vec::with_capacity(l),
};
while let Some(i) = access.next_element()? {
v.push(i)
}
Ok(From::from(v))
}
}
struct MapVisitor<'de, S, K, V> {
phantom_s: PhantomData<S>,
phantom_k: PhantomData<K>,
phantom_v: PhantomData<V>,
phantom_lifetime: PhantomData<&'de ()>,
}
impl<'de, S, K, V> MapVisitor<'de, S, K, V> {
pub(crate) fn new() -> MapVisitor<'de, S, K, V> {
MapVisitor {
phantom_s: PhantomData,
phantom_k: PhantomData,
phantom_v: PhantomData,
phantom_lifetime: PhantomData,
}
}
}
impl<'de, S, K, V> Visitor<'de> for MapVisitor<'de, S, K, V>
where
S: From<Vec<(K, V)>>,
K: Deserialize<'de>,
V: Deserialize<'de>,
{
type Value = S;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("a sequence")
}
fn visit_map<Access>(self, mut access: Access) -> Result<Self::Value, Access::Error>
where
Access: MapAccess<'de>,
{
let mut v: Vec<(K, V)> = match access.size_hint() {
None => Vec::new(),
Some(l) => Vec::with_capacity(l),
};
while let Some(i) = access.next_entry()? {
v.push(i)
}
Ok(From::from(v))
}
}
impl<'de, A: Deserialize<'de> + Ord + Clone> Deserialize<'de> for OrdSet<A> {
fn deserialize<D>(des: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
des.deserialize_seq(SeqVisitor::new())
}
}
impl<A: Ord + Serialize> Serialize for OrdSet<A> {
fn serialize<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut s = ser.serialize_seq(Some(self.len()))?;
for i in self.iter() {
s.serialize_element(i)?;
}
s.end()
}
}
impl<'de, K: Deserialize<'de> + Ord + Clone, V: Deserialize<'de> + Clone> Deserialize<'de>
for OrdMap<K, V>
{
fn deserialize<D>(des: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
des.deserialize_map(MapVisitor::<'de, OrdMap<K, V>, K, V>::new())
}
}
impl<K: Serialize + Ord, V: Serialize> Serialize for OrdMap<K, V> {
fn serialize<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut s = ser.serialize_map(Some(self.len()))?;
for (k, v) in self.iter() {
s.serialize_entry(k, v)?;
}
s.end()
}
}
impl<'de, K, V, S> Deserialize<'de> for HashMap<K, V, S>
where
K: Deserialize<'de> + Hash + Eq + Clone,
V: Deserialize<'de> + Clone,
S: BuildHasher + Default,
{
fn deserialize<D>(des: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
des.deserialize_map(MapVisitor::<'de, HashMap<K, V, S>, K, V>::new())
}
}
impl<K, V, S> Serialize for HashMap<K, V, S>
where
K: Serialize + Hash + Eq,
V: Serialize,
S: BuildHasher + Default,
{
fn serialize<Ser>(&self, ser: Ser) -> Result<Ser::Ok, Ser::Error>
where
Ser: Serializer,
{
let mut s = ser.serialize_map(Some(self.len()))?;
for (k, v) in self.iter() {
s.serialize_entry(k, v)?;
}
s.end()
}
}
impl<'de, A: Deserialize<'de> + Hash + Eq + Clone, S: BuildHasher + Default> Deserialize<'de>
for HashSet<A, S>
{
fn deserialize<D>(des: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
des.deserialize_seq(SeqVisitor::new())
}
}
impl<A: Serialize + Hash + Eq, S: BuildHasher + Default> Serialize for HashSet<A, S> {
fn serialize<Ser>(&self, ser: Ser) -> Result<Ser::Ok, Ser::Error>
where
Ser: Serializer,
{
let mut s = ser.serialize_seq(Some(self.len()))?;
for i in self.iter() {
s.serialize_element(i)?;
}
s.end()
}
}
impl<'de, A: Clone + Deserialize<'de>> Deserialize<'de> for Vector<A> {
fn deserialize<D>(des: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
des.deserialize_seq(SeqVisitor::<'de, Vector<A>, A>::new())
}
}
impl<A: Serialize> Serialize for Vector<A> {
fn serialize<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut s = ser.serialize_seq(Some(self.len()))?;
for i in self.iter() {
s.serialize_element(i)?;
}
s.end()
}
}
#[cfg(test)]
mod test {
use super::*;
use crate::proptest::{hash_map, hash_set, ord_map, ord_set, vector};
use ::proptest::num::i32;
use ::proptest::proptest;
use serde_json::{from_str, to_string};
proptest! {
#[test]
fn ser_ordset(ref v in ord_set(i32::ANY, 0..100)) {
assert_eq!(v, &from_str::<OrdSet<i32>>(&to_string(&v).unwrap()).unwrap());
}
#[test]
fn ser_ordmap(ref v in ord_map(i32::ANY, i32::ANY, 0..100)) {
assert_eq!(v, &from_str::<OrdMap<i32, i32>>(&to_string(&v).unwrap()).unwrap());
}
#[test]
fn ser_hashmap(ref v in hash_map(i32::ANY, i32::ANY, 0..100)) {
assert_eq!(v, &from_str::<HashMap<i32, i32>>(&to_string(&v).unwrap()).unwrap());
}
#[test]
fn ser_hashset(ref v in hash_set(i32::ANY, 0..100)) {
assert_eq!(v, &from_str::<HashSet<i32>>(&to_string(&v).unwrap()).unwrap());
}
#[test]
fn ser_vector(ref v in vector(i32::ANY, 0..100)) {
assert_eq!(v, &from_str::<Vector<i32>>(&to_string(&v).unwrap()).unwrap());
}
}
}