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annotate rust/hg-cpython/src/exceptions.rs @ 42749:7ceded4419a3

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rust-dirstate: use EntryState enum instead of literals This improves code readability quite a bit, while also adding a layer of safety because we're checking the state byte against the enum. Differential Revision: https://phab.mercurial-scm.org/D6629
author Rapha?l Gom?s <rgomes@octobus.net>
date Tue, 09 Jul 2019 12:15:09 +0200
parents 326fdce22fb2
children 30320c7bf79f
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::{
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16 exc::{IOError, 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, PatternError, RuntimeError);
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43 py_exception!(rustext, PatternFileError, RuntimeError);
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44
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45 impl PatternError {
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46 pub fn pynew(py: Python, inner: hg::PatternError) -> PyErr {
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47 match inner {
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48 hg::PatternError::UnsupportedSyntax(m) => {
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49 PatternError::new(py, ("PatternError", m))
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50 }
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51 }
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52 }
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53 }
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54
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55 impl PatternFileError {
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56 pub fn pynew(py: Python, inner: hg::PatternFileError) -> PyErr {
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57 match inner {
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58 hg::PatternFileError::IO(e) => {
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59 let value = (e.raw_os_error().unwrap_or(2), e.to_string());
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60 PyErr::new::<IOError, _>(py, value)
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61 }
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62 hg::PatternFileError::Pattern(e, l) => match e {
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63 hg::PatternError::UnsupportedSyntax(m) => {
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64 PatternFileError::new(py, ("PatternFileError", m, l))
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65 }
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66 },
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67 }
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68 }
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69 }