Skip to content

Fix deserializing set and frozenset. #39

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 2 commits into from
Closed

Fix deserializing set and frozenset. #39

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
3ee3124
Add tests for deserializing `set` and `frozenset`
LilyAcorn Mar 3, 2023
858a3fb
Change PySequenceAccess to work with iterators
LilyAcorn Mar 3, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
28 changes: 24 additions & 4 deletions src/de.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ impl<'de> Depythonizer<'de> {
}

fn sequence_access(&self, expected_len: Option<usize>) -> Result<PySequenceAccess<'de>> {
let seq: &PySequence = self.input.downcast()?;
let seq: &PyIterator = self.input.iter()?;
let len = self.input.len()?;

match expected_len {
Expand Down Expand Up @@ -289,13 +289,13 @@ impl<'a, 'de> de::Deserializer<'de> for &'a mut Depythonizer<'de> {
}

struct PySequenceAccess<'a> {
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

It might be appropriate to rename this too, perhaps to PyIteratorAccess.

seq: &'a PySequence,
seq: &'a PyIterator,
index: usize,
len: usize,
}

impl<'a> PySequenceAccess<'a> {
fn new(seq: &'a PySequence, len: usize) -> Self {
fn new(seq: &'a PyIterator, len: usize) -> Self {
Self { seq, index: 0, len }
}
}
Expand All @@ -308,7 +308,11 @@ impl<'de> de::SeqAccess<'de> for PySequenceAccess<'de> {
T: de::DeserializeSeed<'de>,
{
if self.index < self.len {
let mut item_de = Depythonizer::from_object(self.seq.get_item(self.index)?);
let item = match self.seq.next() {
Some(item) => item?,
None => return Ok(None),
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This branch shouldn't happen for set or frozenset, since the length is known.

It might not be necessary to have the index checks any more, as long as we still check the length is finite.

};
let mut item_de = Depythonizer::from_object(item);
self.index += 1;
seed.deserialize(&mut item_de).map(Some)
} else {
Expand Down Expand Up @@ -558,6 +562,22 @@ mod test {
test_de(code, &expected, &expected_json);
}

#[test]
fn test_tuple_from_pyset() {
let expected = ("foo".to_string(), 5);
let expected_json = json!(["foo", 5]);
let code = "{'foo', 5}";
test_de(code, &expected, &expected_json);
}

#[test]
fn test_tuple_from_pyfrozenset() {
let expected = ("foo".to_string(), 5);
let expected_json = json!(["foo", 5]);
let code = "frozenset({'foo', 5})";
test_de(code, &expected, &expected_json);
}

#[test]
fn test_vec() {
let expected = vec![3, 2, 1];
Expand Down