58 lines
1.1 KiB
Rust
58 lines
1.1 KiB
Rust
#![cfg(feature = "macros")]
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use pyo3::exceptions::PyIndexError;
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use pyo3::prelude::*;
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use pyo3::types::IntoPyDict;
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use pyo3::py_run;
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mod common;
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#[pyclass]
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struct Vector3 {
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elements: [f64; 3],
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}
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#[pymethods]
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impl Vector3 {
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#[new]
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fn new(x: f64, y: f64, z: f64) -> Self {
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Self {
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elements: [x, y, z],
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}
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}
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#[staticmethod]
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fn __len__() -> usize {
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3
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}
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fn __getitem__(&self, idx: isize) -> PyResult<f64> {
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self.elements
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.get(idx as usize)
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.copied()
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.ok_or_else(|| PyIndexError::new_err("list index out of range"))
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}
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fn __setitem__(&mut self, idx: isize, value: f64) {
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self.elements[idx as usize] = value;
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}
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}
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/// Return a dict with `s = Vector3(1, 2, 3)`.
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fn seq_dict(py: Python<'_>) -> &pyo3::types::PyDict {
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let d = [("Vector3", py.get_type::<Vector3>())].into_py_dict(py);
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// Though we can construct `s` in Rust, let's test `__new__` works.
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py_run!(py, *d, "s = Vector3(1, 2, 3)");
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d
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}
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#[test]
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fn test_len() {
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Python::with_gil(|py| {
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let d = seq_dict(py);
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py_assert!(py, *d, "len(s) == 3");
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});
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}
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