#[cfg(feature = "experimental-inspect")]
use crate::inspect::types::TypeInfo;
use crate::{
ffi, AsPyPointer, FromPyObject, IntoPy, PyAny, PyErr, PyObject, PyResult, Python, ToPyObject,
};
use std::os::raw::c_double;
#[repr(transparent)]
pub struct PyFloat(PyAny);
pyobject_native_type!(
PyFloat,
ffi::PyFloatObject,
ffi::PyFloat_Type,
#checkfunction=ffi::PyFloat_Check
);
impl PyFloat {
pub fn new(py: Python<'_>, val: c_double) -> &PyFloat {
unsafe { py.from_owned_ptr(ffi::PyFloat_FromDouble(val)) }
}
pub fn value(&self) -> c_double {
unsafe { ffi::PyFloat_AsDouble(self.as_ptr()) }
}
}
impl ToPyObject for f64 {
fn to_object(&self, py: Python<'_>) -> PyObject {
PyFloat::new(py, *self).into()
}
}
impl IntoPy<PyObject> for f64 {
fn into_py(self, py: Python<'_>) -> PyObject {
PyFloat::new(py, self).into()
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::builtin("float")
}
}
impl<'source> FromPyObject<'source> for f64 {
#![allow(clippy::float_cmp)]
fn extract(obj: &'source PyAny) -> PyResult<Self> {
let v = unsafe { ffi::PyFloat_AsDouble(obj.as_ptr()) };
if v == -1.0 {
if let Some(err) = PyErr::take(obj.py()) {
return Err(err);
}
}
Ok(v)
}
#[cfg(feature = "experimental-inspect")]
fn type_input() -> TypeInfo {
Self::type_output()
}
}
impl ToPyObject for f32 {
fn to_object(&self, py: Python<'_>) -> PyObject {
PyFloat::new(py, f64::from(*self)).into()
}
}
impl IntoPy<PyObject> for f32 {
fn into_py(self, py: Python<'_>) -> PyObject {
PyFloat::new(py, f64::from(self)).into()
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::builtin("float")
}
}
impl<'source> FromPyObject<'source> for f32 {
fn extract(obj: &'source PyAny) -> PyResult<Self> {
Ok(obj.extract::<f64>()? as f32)
}
#[cfg(feature = "experimental-inspect")]
fn type_input() -> TypeInfo {
Self::type_output()
}
}
#[cfg(test)]
mod tests {
#[cfg(not(Py_LIMITED_API))]
use crate::ffi::PyFloat_AS_DOUBLE;
#[cfg(not(Py_LIMITED_API))]
use crate::AsPyPointer;
use crate::{Python, ToPyObject};
macro_rules! num_to_py_object_and_back (
($func_name:ident, $t1:ty, $t2:ty) => (
#[test]
fn $func_name() {
use assert_approx_eq::assert_approx_eq;
Python::with_gil(|py| {
let val = 123 as $t1;
let obj = val.to_object(py);
assert_approx_eq!(obj.extract::<$t2>(py).unwrap(), val as $t2);
});
}
)
);
num_to_py_object_and_back!(to_from_f64, f64, f64);
num_to_py_object_and_back!(to_from_f32, f32, f32);
num_to_py_object_and_back!(int_to_float, i32, f64);
#[cfg(not(Py_LIMITED_API))]
#[test]
fn test_as_double_macro() {
use assert_approx_eq::assert_approx_eq;
Python::with_gil(|py| {
let v = 1.23f64;
let obj = v.to_object(py);
assert_approx_eq!(v, unsafe { PyFloat_AS_DOUBLE(obj.as_ptr()) });
});
}
}