PyTryFrom::try_from_mut_unchecked()
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@ -237,6 +237,11 @@ pub trait PyTryFrom: Sized {
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/// Cast a PyObjectRef to a specific type of PyObject. The caller must
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/// have already verified the reference is for this type.
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unsafe fn try_from_unchecked(value: &PyObjectRef) -> &Self;
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/// Cast a PyObjectRef to a specific type of PyObject. The caller must
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/// have already verified the reference is for this type.
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#[allow(clippy::mut_from_ref)]
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unsafe fn try_from_mut_unchecked(value: &PyObjectRef) -> &mut Self;
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}
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// TryFrom implies TryInto
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@ -287,12 +292,7 @@ where
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fn try_from_mut(value: &PyObjectRef) -> Result<&mut T, PyDowncastError> {
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unsafe {
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if T::is_instance(value) {
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let ptr = if T::OFFSET == 0 {
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value as *const _ as *mut u8 as *mut T
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} else {
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(value.as_ptr() as *mut u8).offset(T::OFFSET) as *mut T
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};
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Ok(&mut *ptr)
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Ok(PyTryFrom::try_from_mut_unchecked(value))
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} else {
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Err(PyDowncastError)
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}
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@ -302,12 +302,7 @@ where
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fn try_from_mut_exact(value: &PyObjectRef) -> Result<&mut T, PyDowncastError> {
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unsafe {
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if T::is_exact_instance(value) {
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let ptr = if T::OFFSET == 0 {
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value as *const _ as *mut u8 as *mut T
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} else {
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(value.as_ptr() as *mut u8).offset(T::OFFSET) as *mut T
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};
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Ok(&mut *ptr)
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Ok(PyTryFrom::try_from_mut_unchecked(value))
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} else {
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Err(PyDowncastError)
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}
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@ -323,6 +318,16 @@ where
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};
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&*ptr
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}
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#[inline]
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unsafe fn try_from_mut_unchecked(value: &PyObjectRef) -> &mut T {
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let ptr = if T::OFFSET == 0 {
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value as *const _ as *mut u8 as *mut T
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} else {
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(value.as_ptr() as *mut u8).offset(T::OFFSET) as *mut T
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};
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&mut *ptr
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}
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}
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/// This trait wraps a T: IntoPyObject into PyResult<T> while PyResult<T> remains PyResult<T>.
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@ -293,8 +293,7 @@ impl PyTryFrom for PySequence {
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fn try_from_mut(value: &PyObjectRef) -> Result<&mut PySequence, PyDowncastError> {
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unsafe {
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if ffi::PySequence_Check(value.as_ptr()) != 0 {
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let ptr = value as *const _ as *mut PySequence;
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Ok(&mut *ptr)
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Ok(<PySequence as PyTryFrom>::try_from_mut_unchecked(value))
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} else {
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Err(PyDowncastError)
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}
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@ -302,7 +301,7 @@ impl PyTryFrom for PySequence {
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}
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fn try_from_mut_exact(value: &PyObjectRef) -> Result<&mut PySequence, PyDowncastError> {
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PySequence::try_from_mut(value)
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<PySequence as PyTryFrom>::try_from_mut(value)
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}
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#[inline]
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@ -310,6 +309,12 @@ impl PyTryFrom for PySequence {
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let ptr = value as *const _ as *const PySequence;
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&*ptr
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}
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#[inline]
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unsafe fn try_from_mut_unchecked(value: &PyObjectRef) -> &mut PySequence {
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let ptr = value as *const _ as *mut PySequence;
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&mut *ptr
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}
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}
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#[cfg(test)]
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