59 lines
1.4 KiB
Rust
59 lines
1.4 KiB
Rust
// Copyright (c) 2017-present PyO3 Project and Contributors
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use std;
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use conversion::{IntoPyObject, IntoPyTuple, ToPyObject};
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use ffi;
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use instance::Py;
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use object::PyObject;
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use objects::PyTuple;
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use python::{IntoPyDictPointer, Python};
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/// An empty struct that represents the empty argument list.
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/// Corresponds to the empty tuple `()` in Python.
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///
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/// # Example
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/// ```
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/// let gil = pyo3::Python::acquire_gil();
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/// let py = gil.python();
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/// let os = py.import("os").unwrap();
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/// let pid = os.call("get_pid", pyo3::NoArgs, pyo3::NoArgs);
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/// ```
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#[derive(Copy, Clone, Debug)]
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pub struct NoArgs;
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/// Converts `NoArgs` to an empty Python tuple.
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impl IntoPyTuple for NoArgs {
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fn into_tuple(self, py: Python) -> Py<PyTuple> {
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PyTuple::empty(py)
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}
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}
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/// Converts `()` to an empty Python tuple.
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impl IntoPyTuple for () {
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fn into_tuple(self, py: Python) -> Py<PyTuple> {
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PyTuple::empty(py)
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}
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}
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/// Converts `NoArgs` to an empty Python tuple.
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impl ToPyObject for NoArgs {
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fn to_object(&self, py: Python) -> PyObject {
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PyTuple::empty(py).into()
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}
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}
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/// Converts `NoArgs` to an empty Python tuple.
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impl IntoPyObject for NoArgs {
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fn into_object(self, py: Python) -> PyObject {
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PyTuple::empty(py).into()
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}
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}
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/// Converts `NoArgs` to an null pointer.
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impl IntoPyDictPointer for NoArgs {
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fn into_dict_ptr(self, _: Python) -> *mut ffi::PyObject {
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std::ptr::null_mut()
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}
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}
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