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#![cfg(feature = "hashbrown")]
#![cfg_attr(docsrs, cfg_attr(docsrs, doc = concat!("pyo3 = { version = \"", env!("CARGO_PKG_VERSION"), "\", features = [\"hashbrown\"] }")))]
#![cfg_attr(
not(docsrs),
doc = "pyo3 = { version = \"*\", features = [\"hashbrown\"] }"
)]
use crate::{
types::set::new_from_iter,
types::{IntoPyDict, PyDict, PySet},
FromPyObject, IntoPy, PyAny, PyErr, PyObject, PyResult, Python, ToPyObject,
};
use std::{cmp, hash};
impl<K, V, H> ToPyObject for hashbrown::HashMap<K, V, H>
where
K: hash::Hash + cmp::Eq + ToPyObject,
V: ToPyObject,
H: hash::BuildHasher,
{
fn to_object(&self, py: Python<'_>) -> PyObject {
IntoPyDict::into_py_dict(self, py).into()
}
}
impl<K, V, H> IntoPy<PyObject> for hashbrown::HashMap<K, V, H>
where
K: hash::Hash + cmp::Eq + IntoPy<PyObject>,
V: IntoPy<PyObject>,
H: hash::BuildHasher,
{
fn into_py(self, py: Python<'_>) -> PyObject {
let iter = self
.into_iter()
.map(|(k, v)| (k.into_py(py), v.into_py(py)));
IntoPyDict::into_py_dict(iter, py).into()
}
}
impl<'source, K, V, S> FromPyObject<'source> for hashbrown::HashMap<K, V, S>
where
K: FromPyObject<'source> + cmp::Eq + hash::Hash,
V: FromPyObject<'source>,
S: hash::BuildHasher + Default,
{
fn extract(ob: &'source PyAny) -> Result<Self, PyErr> {
let dict: &PyDict = ob.downcast()?;
let mut ret = hashbrown::HashMap::with_capacity_and_hasher(dict.len(), S::default());
for (k, v) in dict.iter() {
ret.insert(K::extract(k)?, V::extract(v)?);
}
Ok(ret)
}
}
impl<T> ToPyObject for hashbrown::HashSet<T>
where
T: hash::Hash + Eq + ToPyObject,
{
fn to_object(&self, py: Python<'_>) -> PyObject {
new_from_iter(py, self)
.expect("Failed to create Python set from hashbrown::HashSet")
.into()
}
}
impl<K, S> IntoPy<PyObject> for hashbrown::HashSet<K, S>
where
K: IntoPy<PyObject> + Eq + hash::Hash,
S: hash::BuildHasher + Default,
{
fn into_py(self, py: Python<'_>) -> PyObject {
new_from_iter(py, self.into_iter().map(|item| item.into_py(py)))
.expect("Failed to create Python set from hashbrown::HashSet")
.into()
}
}
impl<'source, K, S> FromPyObject<'source> for hashbrown::HashSet<K, S>
where
K: FromPyObject<'source> + cmp::Eq + hash::Hash,
S: hash::BuildHasher + Default,
{
fn extract(ob: &'source PyAny) -> PyResult<Self> {
let set: &PySet = ob.downcast()?;
set.iter().map(K::extract).collect()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_hashbrown_hashmap_to_python() {
Python::with_gil(|py| {
let mut map = hashbrown::HashMap::<i32, i32>::new();
map.insert(1, 1);
let m = map.to_object(py);
let py_map: &PyDict = m.downcast(py).unwrap();
assert!(py_map.len() == 1);
assert!(py_map.get_item(1).unwrap().extract::<i32>().unwrap() == 1);
assert_eq!(map, py_map.extract().unwrap());
});
}
#[test]
fn test_hashbrown_hashmap_into_python() {
Python::with_gil(|py| {
let mut map = hashbrown::HashMap::<i32, i32>::new();
map.insert(1, 1);
let m: PyObject = map.into_py(py);
let py_map: &PyDict = m.downcast(py).unwrap();
assert!(py_map.len() == 1);
assert!(py_map.get_item(1).unwrap().extract::<i32>().unwrap() == 1);
});
}
#[test]
fn test_hashbrown_hashmap_into_dict() {
Python::with_gil(|py| {
let mut map = hashbrown::HashMap::<i32, i32>::new();
map.insert(1, 1);
let py_map = map.into_py_dict(py);
assert_eq!(py_map.len(), 1);
assert_eq!(py_map.get_item(1).unwrap().extract::<i32>().unwrap(), 1);
});
}
#[test]
fn test_extract_hashbrown_hashset() {
Python::with_gil(|py| {
let set = PySet::new(py, &[1, 2, 3, 4, 5]).unwrap();
let hash_set: hashbrown::HashSet<usize> = set.extract().unwrap();
assert_eq!(hash_set, [1, 2, 3, 4, 5].iter().copied().collect());
});
}
#[test]
fn test_hashbrown_hashset_into_py() {
Python::with_gil(|py| {
let hs: hashbrown::HashSet<u64> = [1, 2, 3, 4, 5].iter().cloned().collect();
let hso: PyObject = hs.clone().into_py(py);
assert_eq!(hs, hso.extract(py).unwrap());
});
}
}