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introduce extract extract_cloned

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This commit is contained in:
Kangzhi Shi
2021-11-16 21:12:33 +02:00
committed by Jeong YunWon
parent 2078f58e26
commit 141679c1c0
1 changed files with 42 additions and 0 deletions
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42
vm/src/protocol/sequence.rs
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@@ -366,6 +366,48 @@ impl PySequence<'_> {
Err(vm.new_value_error("sequence.index(x): x not in sequence".to_string()))
}
pub fn extract<F, R>(&self, mut f: F, vm: &VirtualMachine) -> PyResult<Vec<R>>
where
F: FnMut(&PyObject) -> PyResult<R>,
{
if let Some(tuple) = self.obj.payload_if_exact::<PyTuple>(vm) {
tuple.as_slice().iter().map(|x| f(x.as_ref())).collect()
} else if let Some(list) = self.obj.payload_if_exact::<PyList>(vm) {
list.borrow_vec().iter().map(|x| f(x.as_ref())).collect()
} else {
let iter = self.obj.to_owned().get_iter(vm)?;
let iter = iter.iter::<PyObjectRef>(vm)?;
let len = self.length(vm).unwrap_or(0);
let mut v = Vec::with_capacity(len);
for x in iter {
v.push(f(x?.as_ref())?);
}
v.shrink_to_fit();
Ok(v)
}
}
pub fn extract_cloned<F, R>(&self, mut f: F, vm: &VirtualMachine) -> PyResult<Vec<R>>
where
F: FnMut(PyObjectRef) -> PyResult<R>,
{
if let Some(tuple) = self.obj.payload_if_exact::<PyTuple>(vm) {
tuple.as_slice().iter().map(|x| f(x.clone())).collect()
} else if let Some(list) = self.obj.payload_if_exact::<PyList>(vm) {
list.borrow_vec().iter().map(|x| f(x.clone())).collect()
} else {
let iter = self.obj.to_owned().get_iter(vm)?;
let iter = iter.iter::<PyObjectRef>(vm)?;
let len = self.length(vm).unwrap_or(0);
let mut v = Vec::with_capacity(len);
for x in iter {
v.push(f(x?)?);
}
v.shrink_to_fit();
Ok(v)
}
}
}
const NOT_IMPLEMENTED: PySequenceMethods = PySequenceMethods {