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annotate rust/hg-cpython/src/exceptions.rs @ 42098:5753e5949b51

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py3: add b'' prefixes to new doctests in match.py # skip-blame as just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D6221
author Pulkit Goyal <pulkit@yandex-team.ru>
date Wed, 10 Apr 2019 03:10:53 +0530
parents ee943a920606
children 94f3a73b6672
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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::exc::ValueError;
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16 use cpython::{PyErr, Python};
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17 use hg;
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18
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19 py_exception!(rustext, GraphError, ValueError);
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20
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21 impl GraphError {
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22 pub fn pynew(py: Python, inner: hg::GraphError) -> PyErr {
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23 match inner {
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24 hg::GraphError::ParentOutOfRange(r) => {
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25 GraphError::new(py, ("ParentOutOfRange", r))
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26 }
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27 hg::GraphError::WorkingDirectoryUnsupported => {
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28 match py
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29 .import("mercurial.error")
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30 .and_then(|m| m.get(py, "WdirUnsupported"))
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31 {
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32 Err(e) => e,
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33 Ok(cls) => PyErr::from_instance(py, cls),
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34 }
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35 }
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36 }
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37 }
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38 }