Mercurial > hg
annotate rust/hg-cpython/src/exceptions.rs @ 44206:9804badd5970
rust-cpython: make PySharedRef::try_borrow_mut() return BorrowMutError
As I said, it shouldn't be an error of Python layer, but is something like
a coding error. Returning BorrowMutError makes more sense.
There's a weird hack to propagate the borrow-by-leaked state to RefCell
to obtain BorrowMutError. If we don't like it, maybe we can add our own
BorrowMutError.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sat, 19 Oct 2019 17:01:28 +0900 |
parents | 3bd77c64bc74 |
children | f96b28aa4b79 |
rev | line source |
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rust-cpython: rustdoc improvements
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1 // ancestors.rs |
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2 // |
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3 // Copyright 2018 Georges Racinet <gracinet@anybox.fr> |
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4 // |
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5 // This software may be used and distributed according to the terms of the |
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6 // GNU General Public License version 2 or any later version. |
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7 |
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8 //! Bindings for Rust errors |
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9 //! |
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10 //! [`GraphError`] exposes `hg::GraphError` as a subclass of `ValueError` |
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11 //! but some variants of `hg::GraphError` can be converted directly to other |
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12 //! existing Python exceptions if appropriate. |
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13 //! |
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14 //! [`GraphError`]: struct.GraphError.html |
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15 use cpython::{ |
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16 exc::{RuntimeError, ValueError}, |
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17 py_exception, PyErr, Python, |
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18 }; |
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19 use hg; |
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20 |
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21 py_exception!(rustext, GraphError, ValueError); |
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22 |
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23 impl GraphError { |
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24 pub fn pynew(py: Python, inner: hg::GraphError) -> PyErr { |
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25 match inner { |
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26 hg::GraphError::ParentOutOfRange(r) => { |
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27 GraphError::new(py, ("ParentOutOfRange", r)) |
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28 } |
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29 hg::GraphError::WorkingDirectoryUnsupported => { |
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30 match py |
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31 .import("mercurial.error") |
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32 .and_then(|m| m.get(py, "WdirUnsupported")) |
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33 { |
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34 Err(e) => e, |
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35 Ok(cls) => PyErr::from_instance(py, cls), |
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36 } |
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37 } |
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38 } |
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39 } |
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40 } |
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41 |
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42 py_exception!(rustext, HgPathPyError, RuntimeError); |