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err: tweak names, inlining and docs

This commit is contained in:
David Hewitt 2021-11-25 19:30:03 +00:00
parent b2bbf972d0
commit 2ac30ec411
12 changed files with 207 additions and 102 deletions
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7
CHANGELOG.md
View File

@ -25,6 +25,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Changed
- `PyType::is_subclass`, `PyErr::is_instance` and `PyAny::is_instance` now operate run-time type object instead of a type known at compile-time. The old behavior is still available as `PyType::is_subclass_of`, `PyErr::is_instance_of` and `PyAny::is_instance_of`. [#1985](https://github.com/PyO3/pyo3/pull/1985)
- Rename some methods on `PyErr` (the old names are just marked deprecated for now): [#2026](https://github.com/PyO3/pyo3/pull/2026)
- `pytype` -> `get_type`
- `pvalue` -> `value` (and deprecate equivalent `instance`)
- `ptraceback` -> `traceback`
- `from_instance` -> `from_value`
- `into_instance` -> `into_value`
### Removed
@ -34,6 +40,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Fixed
- Fix undefined symbol for `PyObject_HasAttr` on PyPy. [#2025](https://github.com/PyO3/pyo3/pull/2025)
- Fix memory leak in `PyErr::into_value`. [#2026](https://github.com/PyO3/pyo3/pull/2026)
## [0.15.1] - 2021-11-19

10
guide/src/exception.md
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@ -90,10 +90,10 @@ Python::with_gil(|py| {
});
```
If you already have a Python exception instance, you can simply call [`PyErr::from_instance`].
If you already have a Python exception object, you can simply call [`PyErr::from_value`].
```rust,ignore
PyErr::from_instance(py, err).restore(py);
PyErr::from_value(py, err).restore(py);
```
@ -134,7 +134,7 @@ which is an alias for the type `Result<T, PyErr>`.
A [`PyErr`] represents a Python exception. Errors within the PyO3 library are also exposed as
Python exceptions.
If your code has a custom error type, adding an implementation of `std::convert::From<MyError> for PyErr`
If your code has a custom error type, adding an implementation of `std::convert::From<MyError> for PyErr`
is usually enough. PyO3 will then automatically convert your error to a Python exception when needed.
The following code snippet defines a Rust error named `CustomIOError`. In its `From<CustomIOError> for PyErr`
@ -188,7 +188,7 @@ fn main() {
```
This has been implemented for most of Rust's standard library errors, so that you can use the `?`
("try") operator with them. The following code snippet will raise a `ValueError` in Python if
("try") operator with them. The following code snippet will raise a `ValueError` in Python if
`String::parse()` returns an error.
```rust
@ -254,6 +254,6 @@ defines exceptions for several standard library modules.
[`PyErr`]: {{#PYO3_DOCS_URL}}/pyo3/struct.PyErr.html
[`PyResult`]: {{#PYO3_DOCS_URL}}/pyo3/type.PyResult.html
[`PyErr::from_instance`]: {{#PYO3_DOCS_URL}}/pyo3/struct.PyErr.html#method.from_instance
[`PyErr::from_value`]: {{#PYO3_DOCS_URL}}/pyo3/struct.PyErr.html#method.from_value
[`PyAny::is_instance`]: {{#PYO3_DOCS_URL}}/pyo3/struct.PyAny.html#method.is_instance
[`PyAny::is_instance_of`]: {{#PYO3_DOCS_URL}}/pyo3/struct.PyAny.html#method.is_instance_of

2
guide/src/migration.md
View File

@ -170,7 +170,7 @@ let err: PyErr = TypeError::py_err("error message");
After:
```rust
```rust,ignore
# use pyo3::{PyErr, PyResult, Python, type_object::PyTypeObject};
# use pyo3::exceptions::{PyBaseException, PyTypeError};
# Python::with_gil(|py| -> PyResult<()> {

2
guide/src/python_from_rust.md
View File

@ -280,7 +280,7 @@ class House(object):
Err(e) => {
house.call_method1(
"__exit__",
(e.ptype(py), e.pvalue(py), e.ptraceback(py))
(e.get_type(py), e.value(py), e.traceback(py))
).unwrap();
}
}

8
pyo3-macros-backend/src/from_pyobject.rs
View File

@ -61,9 +61,9 @@ impl<'a> Enum<'a> {
match maybe_ret {
ok @ ::std::result::Result::Ok(_) => return ok,
::std::result::Result::Err(inner) => {
::std::result::Result::Err(err) => {
let py = ::pyo3::PyNativeType::py(obj);
err_reasons.push_str(&::std::format!("{}\n", inner.instance(py).str()?));
err_reasons.push_str(&::std::format!("{}\n", err.value(py).str()?));
}
}
);
@ -221,11 +221,11 @@ impl<'a> Container<'a> {
format!("failed to extract inner field of {}", quote!(#self_ty))
};
quote!(
::std::result::Result::Ok(#self_ty(obj.extract().map_err(|inner| {
::std::result::Result::Ok(#self_ty(obj.extract().map_err(|err| {
let py = ::pyo3::PyNativeType::py(obj);
let err_msg = ::std::format!("{}: {}",
#error_msg,
inner.instance(py).str().unwrap());
err.value(py).str().unwrap());
::pyo3::exceptions::PyTypeError::new_err(err_msg)
})?))
)

4
src/conversions/anyhow.rs
View File

@ -144,7 +144,7 @@ mod test_anyhow {
Python::with_gil(|py| {
let locals = [("err", pyerr)].into_py_dict(py);
let pyerr = py.run("raise err", None, Some(locals)).unwrap_err();
assert_eq!(pyerr.pvalue(py).to_string(), expected_contents);
assert_eq!(pyerr.value(py).to_string(), expected_contents);
})
}
@ -161,7 +161,7 @@ mod test_anyhow {
Python::with_gil(|py| {
let locals = [("err", pyerr)].into_py_dict(py);
let pyerr = py.run("raise err", None, Some(locals)).unwrap_err();
assert_eq!(pyerr.pvalue(py).to_string(), expected_contents);
assert_eq!(pyerr.value(py).to_string(), expected_contents);
})
}
}

2
src/conversions/eyre.rs
View File

@ -145,7 +145,7 @@ mod tests {
Python::with_gil(|py| {
let locals = [("err", pyerr)].into_py_dict(py);
let pyerr = py.run("raise err", None, Some(locals)).unwrap_err();
assert_eq!(pyerr.pvalue(py).to_string(), expected_contents);
assert_eq!(pyerr.value(py).to_string(), expected_contents);
})
}
}

4
src/derive_utils.rs
View File

@ -273,9 +273,9 @@ impl FunctionDescription {
/// Add the argument name to the error message of an error which occurred during argument extraction
pub fn argument_extraction_error(py: Python, arg_name: &str, error: PyErr) -> PyErr {
if error.ptype(py) == py.get_type::<PyTypeError>() {
if error.is_instance_of::<PyTypeError>(py) {
let reason = error
.instance(py)
.value(py)
.str()
.unwrap_or_else(|_| PyString::new(py, ""));
PyTypeError::new_err(format!("argument '{}': {}", arg_name, reason))

242
src/err/mod.rs
View File

@ -7,7 +7,9 @@ use crate::{
exceptions::{self, PyBaseException},
ffi,
};
use crate::{AsPyPointer, IntoPy, Py, PyAny, PyObject, Python, ToBorrowedObject, ToPyObject};
use crate::{
AsPyPointer, IntoPy, IntoPyPointer, Py, PyAny, PyObject, Python, ToBorrowedObject, ToPyObject,
};
use std::borrow::Cow;
use std::cell::UnsafeCell;
use std::ffi::CString;
@ -21,7 +23,14 @@ mod impls;
pub use err_state::PyErrArguments;
use err_state::{boxed_args, PyErrState, PyErrStateNormalized};
/// Represents a Python exception that was raised.
/// Represents a Python exception.
///
/// Python exceptions can be raised in a "lazy" fashion, where the full Python object for the
/// exception is not created until needed. The process of creating the full object is known
/// as "normalization". An exception which has not yet been created is known as "unnormalized".
///
/// This struct builds upon that design, supporting all lazily-created Python exceptions and also
/// supporting exceptions lazily-created from Rust.
pub struct PyErr {
// Safety: can only hand out references when in the "normalized" state. Will never change
// after normalization.
@ -56,15 +65,21 @@ impl<'a> PyDowncastError<'a> {
impl PyErr {
/// Creates a new PyErr of type `T`.
///
/// `value` can be:
/// * a tuple: the exception instance will be created using Python `T(*tuple)`
/// * any other value: the exception instance will be created using Python `T(value)`
/// `args` can be:
/// * a tuple: the exception instance will be created using the equivalent to the Python
/// expression `T(*tuple)`
/// * any other value: the exception instance will be created using the equivalent to the Python
/// expression `T(value)`
///
/// Note: if `value` is not `Send` or `Sync`, consider using `PyErr::from_instance` instead.
/// This error will be stored in an unnormalized state. This avoids the need for the Python GIL
/// to be held, but requires `args` to be `Send` and `Sync`. If `args` is not `Send` or `Sync`,
/// consider using [`PyErr::from_value`] instead.
///
/// Panics if `T` is not a Python class derived from `BaseException`.
/// If an error occurs during normalization (for example if `T` is not a Python type which
/// extends from `BaseException`), then a different error may be produced during normalization.
///
/// # Example
///
/// Example:
/// ```ignore
/// return Err(PyErr::new::<exceptions::PyTypeError, _>("Error message"));
/// ```
@ -73,6 +88,7 @@ impl PyErr {
/// ```ignore
/// return Err(exceptions::PyTypeError::new_err("Error message"));
/// ```
#[inline]
pub fn new<T, A>(args: A) -> PyErr
where
T: PyTypeObject,
@ -84,11 +100,17 @@ impl PyErr {
})
}
/// Constructs a new error, with the usual lazy initialization of Python exceptions.
/// Constructs a new PyErr from the given Python type and arguments.
///
/// `exc` is the exception type; usually one of the standard exceptions
/// `ty` is the exception type; usually one of the standard exceptions
/// like `exceptions::PyRuntimeError`.
/// `args` is the a tuple of arguments to pass to the exception constructor.
///
/// `args` is either a tuple or a single value, with the same meaning as in [`PyErr::new`].
///
/// If an error occurs during normalization (for example if `T` is not a Python type which
/// extends from `BaseException`), then a different error may be produced during normalization.
///
/// This error will be stored in an unnormalized state.
pub fn from_type<A>(ty: &PyType, args: A) -> PyErr
where
A: PyErrArguments + Send + Sync + 'static,
@ -105,32 +127,34 @@ impl PyErr {
/// Creates a new PyErr.
///
/// `obj` must be an Python exception instance, the PyErr will use that instance.
/// If `obj` is a Python exception type object, the PyErr will (lazily) create a new
/// instance of that type.
/// Otherwise, a `TypeError` is created instead.
/// If `obj` is a Python exception object, the PyErr will contain that object. The error will be
/// in a normalized state.
///
/// If `obj` is a Python exception type object, this is equivalent to `PyErr::from_type(obj, ())`.
///
/// Otherwise, a `TypeError` is created.
///
/// # Examples
/// ```rust
/// use pyo3::{exceptions::PyTypeError, types::PyType, IntoPy, PyErr, Python};
/// Python::with_gil(|py| {
/// // Case #1: Exception instance
/// let err = PyErr::from_instance(PyTypeError::new_err("some type error").instance(py));
/// // Case #1: Exception object
/// let err = PyErr::from_value(PyTypeError::new_err("some type error").value(py));
/// assert_eq!(err.to_string(), "TypeError: some type error");
///
/// // Case #2: Exception type
/// let err = PyErr::from_instance(PyType::new::<PyTypeError>(py));
/// let err = PyErr::from_value(PyType::new::<PyTypeError>(py));
/// assert_eq!(err.to_string(), "TypeError: ");
///
/// // Case #3: Invalid exception value
/// let err = PyErr::from_instance("foo".into_py(py).as_ref(py));
/// let err = PyErr::from_value("foo".into_py(py).as_ref(py));
/// assert_eq!(
/// err.to_string(),
/// "TypeError: exceptions must derive from BaseException"
/// );
/// });
/// ```
pub fn from_instance(obj: &PyAny) -> PyErr {
pub fn from_value(obj: &PyAny) -> PyErr {
let ptr = obj.as_ptr();
let state = if unsafe { ffi::PyExceptionInstance_Check(ptr) } != 0 {
@ -152,7 +176,7 @@ impl PyErr {
PyErr::from_state(state)
}
/// Get the type of this exception object.
/// Returns the type of this exception.
///
/// The object will be normalized first if needed.
///
@ -162,14 +186,14 @@ impl PyErr {
///
/// Python::with_gil(|py| {
/// let err: PyErr = PyTypeError::new_err(("some type error",));
/// assert_eq!(err.ptype(py), PyType::new::<PyTypeError>(py));
/// assert_eq!(err.get_type(py), PyType::new::<PyTypeError>(py));
/// });
/// ```
pub fn ptype<'py>(&'py self, py: Python<'py>) -> &'py PyType {
pub fn get_type<'py>(&'py self, py: Python<'py>) -> &'py PyType {
self.normalized(py).ptype.as_ref(py)
}
/// Get the value of this exception object.
/// Returns the value of this exception.
///
/// The object will be normalized first if needed.
///
@ -181,14 +205,22 @@ impl PyErr {
/// Python::with_gil(|py| {
/// let err: PyErr = PyTypeError::new_err(("some type error",));
/// assert!(err.is_instance_of::<PyTypeError>(py));
/// assert_eq!(err.pvalue(py).to_string(), "some type error");
/// assert_eq!(err.value(py).to_string(), "some type error");
/// });
/// ```
pub fn pvalue<'py>(&'py self, py: Python<'py>) -> &'py PyBaseException {
pub fn value<'py>(&'py self, py: Python<'py>) -> &'py PyBaseException {
self.normalized(py).pvalue.as_ref(py)
}
/// Get the value of this exception object.
/// Consumes self to take ownership of the exception value contained in this error.
pub fn into_value(self, py: Python) -> Py<PyBaseException> {
// NB technically this causes one reference count increase and decrease in quick succession
// on pvalue, but it's probably not worth optimizing this right now for the additional code
// complexity.
self.normalized(py).pvalue.clone_ref(py)
}
/// Returns the traceback of this exception object.
///
/// The object will be normalized first if needed.
///
@ -198,10 +230,10 @@ impl PyErr {
///
/// Python::with_gil(|py| {
/// let err = PyTypeError::new_err(("some type error",));
/// assert_eq!(err.ptraceback(py), None);
/// assert_eq!(err.traceback(py), None);
/// });
/// ```
pub fn ptraceback<'py>(&'py self, py: Python<'py>) -> Option<&'py PyTraceback> {
pub fn traceback<'py>(&'py self, py: Python<'py>) -> Option<&'py PyTraceback> {
self.normalized(py)
.ptraceback
.as_ref()
@ -221,8 +253,8 @@ impl PyErr {
/// callback) then this function will resume the panic.
///
/// Use this function when it is not known if an error should be present. If the error is
/// expected to have been set, for example from [PyErr::occurred] or by an error return value
/// from a C FFI function, use [PyErr::fetch].
/// expected to have been set, for example from [`PyErr::occurred`] or by an error return value
/// from a C FFI function, use [`PyErr::fetch`].
pub fn take(py: Python) -> Option<PyErr> {
let (ptype, pvalue, ptraceback) = unsafe {
let mut ptype: *mut ffi::PyObject = std::ptr::null_mut();
@ -267,7 +299,6 @@ impl PyErr {
eprintln!("Python stack trace below:");
unsafe {
use crate::conversion::IntoPyPointer;
ffi::PyErr_Restore(ptype.into_ptr(), pvalue.into_ptr(), ptraceback.into_ptr());
ffi::PyErr_PrintEx(0);
}
@ -361,16 +392,18 @@ impl PyErr {
T: ToBorrowedObject,
{
exc.with_borrowed_ptr(py, |exc| unsafe {
ffi::PyErr_GivenExceptionMatches(self.ptype_ptr(py), exc) != 0
ffi::PyErr_GivenExceptionMatches(self.type_ptr(py), exc) != 0
})
}
/// Returns true if the current exception is instance of `T`.
#[inline]
pub fn is_instance(&self, py: Python, typ: &PyType) -> bool {
unsafe { ffi::PyErr_GivenExceptionMatches(self.ptype_ptr(py), typ.as_ptr()) != 0 }
unsafe { ffi::PyErr_GivenExceptionMatches(self.type_ptr(py), typ.as_ptr()) != 0 }
}
/// Returns true if the current exception is instance of `T`.
#[inline]
pub fn is_instance_of<T>(&self, py: Python) -> bool
where
T: PyTypeObject,
@ -378,18 +411,6 @@ impl PyErr {
self.is_instance(py, T::type_object(py))
}
/// Retrieves the exception instance for this error.
pub fn instance<'py>(&'py self, py: Python<'py>) -> &'py PyBaseException {
self.normalized(py).pvalue.as_ref(py)
}
/// Consumes self to take ownership of the exception instance for this error.
pub fn into_instance(self, py: Python) -> Py<PyBaseException> {
let out = self.normalized(py).pvalue.as_ref(py).into();
std::mem::forget(self);
out
}
/// Writes the error back to the Python interpreter's global state.
/// This is the opposite of `PyErr::fetch()`.
#[inline]
@ -426,11 +447,12 @@ impl PyErr {
/// Python::with_gil(|py| {
/// let err: PyErr = PyTypeError::new_err(("some type error",));
/// let err_clone = err.clone_ref(py);
/// assert_eq!(err.ptype(py), err_clone.ptype(py));
/// assert_eq!(err.pvalue(py), err_clone.pvalue(py));
/// assert_eq!(err.ptraceback(py), err_clone.ptraceback(py));
/// assert_eq!(err.get_type(py), err_clone.get_type(py));
/// assert_eq!(err.value(py), err_clone.value(py));
/// assert_eq!(err.traceback(py), err_clone.traceback(py));
/// });
/// ```
#[inline]
pub fn clone_ref(&self, py: Python) -> PyErr {
PyErr::from_state(PyErrState::Normalized(self.normalized(py).clone()))
}
@ -438,25 +460,23 @@ impl PyErr {
/// Return the cause (either an exception instance, or None, set by `raise ... from ...`)
/// associated with the exception, as accessible from Python through `__cause__`.
pub fn cause(&self, py: Python) -> Option<PyErr> {
let ptr = unsafe { ffi::PyException_GetCause(self.pvalue(py).as_ptr()) };
let ptr = unsafe { ffi::PyException_GetCause(self.value(py).as_ptr()) };
let obj = unsafe { py.from_owned_ptr_or_opt::<PyAny>(ptr) };
obj.map(Self::from_instance)
obj.map(Self::from_value)
}
/// Set the cause associated with the exception, pass `None` to clear it.
pub fn set_cause(&self, py: Python, cause: Option<Self>) {
if let Some(cause) = cause {
let cause = cause.into_instance(py);
unsafe {
ffi::PyException_SetCause(self.pvalue(py).as_ptr(), cause.as_ptr());
}
} else {
unsafe {
ffi::PyException_SetCause(self.pvalue(py).as_ptr(), std::ptr::null_mut());
}
unsafe {
// PyException_SetCause _steals_ a reference to cause, so must use .into_ptr()
ffi::PyException_SetCause(
self.value(py).as_ptr(),
cause.map_or(std::ptr::null_mut(), |err| err.into_value(py).into_ptr()),
);
}
}
#[inline]
fn from_state(state: PyErrState) -> PyErr {
PyErr {
state: UnsafeCell::new(Some(state)),
@ -464,7 +484,7 @@ impl PyErr {
}
/// Returns borrowed reference to this Err's type
fn ptype_ptr(&self, py: Python) -> *mut ffi::PyObject {
fn type_ptr(&self, py: Python) -> *mut ffi::PyObject {
match unsafe { &*self.state.get() } {
// In lazy type case, normalize before returning ptype in case the type is not a valid
// exception type.
@ -476,17 +496,26 @@ impl PyErr {
}
}
#[inline]
fn normalized(&self, py: Python) -> &PyErrStateNormalized {
if let Some(PyErrState::Normalized(n)) = unsafe {
// Safety: self.state will never be written again once normalized.
&*self.state.get()
} {
return n;
}
self.make_normalized(py)
}
#[cold]
fn make_normalized(&self, py: Python) -> &PyErrStateNormalized {
// This process is safe because:
// - Access is guaranteed not to be concurrent thanks to `Python` GIL token
// - Write happens only once, and then never will change again.
// - State is set to None during the normalization process, so that a second
// concurrent normalization attempt will panic before changing anything.
if let Some(PyErrState::Normalized(n)) = unsafe { &*self.state.get() } {
return n;
}
let state = unsafe {
(*self.state.get())
.take()
@ -509,15 +538,66 @@ impl PyErr {
}
}
}
/// Deprecated name for [`PyErr::get_type`].
#[deprecated(
since = "0.16.0",
note = "Use err.get_type(py) instead of err.ptype(py)"
)]
pub fn ptype<'py>(&'py self, py: Python<'py>) -> &'py PyType {
self.get_type(py)
}
/// Deprecated name for [`PyErr::value`].
#[deprecated(since = "0.16.0", note = "Use err.value(py) instead of err.pvalue(py)")]
pub fn pvalue<'py>(&'py self, py: Python<'py>) -> &'py PyBaseException {
self.value(py)
}
/// Deprecated name for [`PyErr::traceback`].
#[deprecated(
since = "0.16.0",
note = "Use err.traceback(py) instead of err.ptraceback(py)"
)]
pub fn ptraceback<'py>(&'py self, py: Python<'py>) -> Option<&'py PyTraceback> {
self.traceback(py)
}
/// Deprecated name for [`PyErr::value`].
#[deprecated(
since = "0.16.0",
note = "Use err.value(py) instead of err.instance(py)"
)]
pub fn instance<'py>(&'py self, py: Python<'py>) -> &'py PyBaseException {
self.value(py)
}
/// Deprecated name for [`PyErr::from_value`].
#[deprecated(
since = "0.16.0",
note = "Use err.from_value(py, obj) instead of err.from_instance(py, obj)"
)]
pub fn from_instance(value: &PyAny) -> PyErr {
PyErr::from_value(value)
}
/// Deprecated name for [`PyErr::into_value`].
#[deprecated(
since = "0.16.0",
note = "Use err.into_value(py) instead of err.into_instance(py)"
)]
pub fn into_instance(self, py: Python) -> Py<PyBaseException> {
self.into_value(py)
}
}
impl std::fmt::Debug for PyErr {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
Python::with_gil(|py| {
f.debug_struct("PyErr")
.field("type", self.ptype(py))
.field("value", self.pvalue(py))
.field("traceback", &self.ptraceback(py))
.field("type", self.get_type(py))
.field("value", self.value(py))
.field("traceback", &self.traceback(py))
.finish()
})
}
@ -526,10 +606,10 @@ impl std::fmt::Debug for PyErr {
impl std::fmt::Display for PyErr {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
Python::with_gil(|py| {
let instance = self.instance(py);
let type_name = instance.get_type().name().map_err(|_| std::fmt::Error)?;
let value = self.value(py);
let type_name = value.get_type().name().map_err(|_| std::fmt::Error)?;
write!(f, "{}", type_name)?;
if let Ok(s) = instance.str() {
if let Ok(s) = value.str() {
write!(f, ": {}", &s.to_string_lossy())
} else {
write!(f, ": <exception str() failed>")
@ -542,7 +622,7 @@ impl std::error::Error for PyErr {}
impl IntoPy<PyObject> for PyErr {
fn into_py(self, py: Python) -> PyObject {
self.into_instance(py).into()
self.into_value(py).into()
}
}
@ -749,4 +829,22 @@ mod tests {
assert_eq!(cause.to_string(), "ValueError: orange");
});
}
#[allow(deprecated)]
#[test]
fn deprecations() {
let err = exceptions::PyValueError::new_err("an error");
Python::with_gil(|py| {
assert_eq!(err.ptype(py), err.get_type(py));
assert_eq!(err.pvalue(py), err.value(py));
assert_eq!(err.instance(py), err.value(py));
assert_eq!(err.ptraceback(py), err.traceback(py));
assert_eq!(
err.clone_ref(py).into_instance(py).as_ref(py),
err.value(py)
);
assert_eq!(PyErr::from_instance(err.value(py)).value(py), err.value(py));
});
}
}

12
src/exceptions.rs
View File

@ -21,7 +21,7 @@ macro_rules! impl_exception_boilerplate {
impl ::std::convert::From<&$name> for $crate::PyErr {
#[inline]
fn from(err: &$name) -> $crate::PyErr {
$crate::PyErr::from_instance(err)
$crate::PyErr::from_value(err)
}
}
@ -613,7 +613,7 @@ macro_rules! test_exception {
assert!(err.is_instance_of::<$exc_ty>(py));
let value: &$exc_ty = err.instance(py).downcast().unwrap();
let value: &$exc_ty = err.value(py).downcast().unwrap();
assert!(value.source().is_none());
err.set_cause(py, Some($crate::exceptions::PyValueError::new_err("a cause")));
@ -755,7 +755,7 @@ mod tests {
let exc = py
.run("raise Exception('banana')", None, None)
.expect_err("raising should have given us an error")
.into_instance(py)
.into_value(py)
.into_ref(py);
assert_eq!(
format!("{:?}", exc),
@ -770,7 +770,7 @@ mod tests {
let exc = py
.run("raise Exception('banana')", None, None)
.expect_err("raising should have given us an error")
.into_instance(py)
.into_value(py)
.into_ref(py);
assert_eq!(
exc.to_string(),
@ -791,7 +791,7 @@ mod tests {
None,
)
.expect_err("raising should have given us an error")
.into_instance(py)
.into_value(py)
.into_ref(py);
assert_eq!(format!("{:?}", exc), "Exception('banana')");
@ -861,7 +861,7 @@ mod tests {
test_exception!(PyUnicodeDecodeError, |py| {
let invalid_utf8 = b"fo\xd8o";
let err = std::str::from_utf8(invalid_utf8).expect_err("should be invalid utf8");
PyErr::from_instance(PyUnicodeDecodeError::new_utf8(py, invalid_utf8, err).unwrap())
PyErr::from_value(PyUnicodeDecodeError::new_utf8(py, invalid_utf8, err).unwrap())
});
test_exception!(PyUnicodeEncodeError, |py: Python<'_>| {
py.eval("chr(40960).encode('ascii')", None, None)

12
src/types/string.rs
View File

@ -73,7 +73,7 @@ impl<'a> PyStringData<'a> {
match self {
Self::Ucs1(data) => match str::from_utf8(data) {
Ok(s) => Ok(Cow::Borrowed(s)),
Err(e) => Err(crate::PyErr::from_instance(PyUnicodeDecodeError::new_utf8(
Err(e) => Err(crate::PyErr::from_value(PyUnicodeDecodeError::new_utf8(
py, data, e,
)?)),
},
@ -83,7 +83,7 @@ impl<'a> PyStringData<'a> {
let mut message = e.to_string().as_bytes().to_vec();
message.push(0);
Err(crate::PyErr::from_instance(PyUnicodeDecodeError::new(
Err(crate::PyErr::from_value(PyUnicodeDecodeError::new(
py,
CStr::from_bytes_with_nul(b"utf-16\0").unwrap(),
self.as_bytes(),
@ -94,7 +94,7 @@ impl<'a> PyStringData<'a> {
},
Self::Ucs4(data) => match data.iter().map(|&c| std::char::from_u32(c)).collect() {
Some(s) => Ok(Cow::Owned(s)),
None => Err(crate::PyErr::from_instance(PyUnicodeDecodeError::new(
None => Err(crate::PyErr::from_value(PyUnicodeDecodeError::new(
py,
CStr::from_bytes_with_nul(b"utf-32\0").unwrap(),
self.as_bytes(),
@ -504,7 +504,7 @@ mod tests {
let data = unsafe { s.data().unwrap() };
assert_eq!(data, PyStringData::Ucs1(b"f\xfe"));
let err = data.to_string(py).unwrap_err();
assert_eq!(err.ptype(py), PyUnicodeDecodeError::type_object(py));
assert_eq!(err.get_type(py), PyUnicodeDecodeError::type_object(py));
assert!(err
.to_string()
.contains("'utf-8' codec can't decode byte 0xfe in position 1"));
@ -546,7 +546,7 @@ mod tests {
let data = unsafe { s.data().unwrap() };
assert_eq!(data, PyStringData::Ucs2(&[0xff22, 0xd800]));
let err = data.to_string(py).unwrap_err();
assert_eq!(err.ptype(py), PyUnicodeDecodeError::type_object(py));
assert_eq!(err.get_type(py), PyUnicodeDecodeError::type_object(py));
assert!(err
.to_string()
.contains("'utf-16' codec can't decode bytes in position 0-3"));
@ -585,7 +585,7 @@ mod tests {
let data = unsafe { s.data().unwrap() };
assert_eq!(data, PyStringData::Ucs4(&[0x20000, 0xd800]));
let err = data.to_string(py).unwrap_err();
assert_eq!(err.ptype(py), PyUnicodeDecodeError::type_object(py));
assert_eq!(err.get_type(py), PyUnicodeDecodeError::type_object(py));
assert!(err
.to_string()
.contains("'utf-32' codec can't decode bytes in position 0-7"));

4
src/types/traceback.rs
View File

@ -33,7 +33,7 @@ impl PyTraceback {
/// .run("raise Exception('banana')", None, None)
/// .expect_err("raise will create a Python error");
///
/// let traceback = err.ptraceback(py).expect("raised exception will have a traceback");
/// let traceback = err.traceback(py).expect("raised exception will have a traceback");
/// assert_eq!(
/// format!("{}{}", traceback.format()?, err),
/// "\
@ -74,7 +74,7 @@ mod tests {
.expect_err("raising should have given us an error");
assert_eq!(
err.ptraceback(py).unwrap().format().unwrap(),
err.traceback(py).unwrap().format().unwrap(),
"Traceback (most recent call last):\n File \"<string>\", line 1, in <module>\n"
);
})