Mercurial > hg
annotate rust/hg-cpython/src/dirstate/dirs_multiset.rs @ 42887:706104dcb2c8
rust-cpython: replace dyn Iterator<..> of sequence with concrete type
We wouldn't care the cost of the dynamic dispatch, but I feel a concrete
type helps understanding error messages.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sun, 08 Sep 2019 12:07:19 +0900 |
parents | 64e28b891796 |
children | ea91a126c803 |
rev | line source |
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1 // dirs_multiset.rs |
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2 // |
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3 // Copyright 2019 Raphaël Gomès <rgomes@octobus.net> |
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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 the `hg::dirstate::dirs_multiset` file provided by the |
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9 //! `hg-core` package. |
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10 |
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11 use std::cell::RefCell; |
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12 use std::convert::TryInto; |
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13 |
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14 use cpython::{ |
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15 exc, ObjectProtocol, PyBytes, PyClone, PyDict, PyErr, PyObject, PyResult, |
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16 Python, |
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17 }; |
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18 |
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19 use crate::dirstate::extract_dirstate; |
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20 use crate::ref_sharing::{PySharedRefCell, PySharedState}; |
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21 use hg::{ |
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22 DirsMultiset, DirsMultisetIter, DirstateMapError, DirstateParseError, |
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23 EntryState, |
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24 }; |
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25 |
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26 py_class!(pub class Dirs |py| { |
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27 data inner: PySharedRefCell<DirsMultiset>; |
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28 data py_shared_state: PySharedState; |
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29 |
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30 // `map` is either a `dict` or a flat iterator (usually a `set`, sometimes |
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31 // a `list`) |
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32 def __new__( |
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33 _cls, |
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34 map: PyObject, |
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35 skip: Option<PyObject> = None |
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36 ) -> PyResult<Self> { |
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37 let mut skip_state: Option<EntryState> = None; |
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38 if let Some(skip) = skip { |
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39 skip_state = Some( |
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40 skip.extract::<PyBytes>(py)?.data(py)[0] |
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41 .try_into() |
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42 .map_err(|e: DirstateParseError| { |
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43 PyErr::new::<exc::ValueError, _>(py, e.to_string()) |
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44 })?, |
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45 ); |
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46 } |
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47 let inner = if let Ok(map) = map.cast_as::<PyDict>(py) { |
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48 let dirstate = extract_dirstate(py, &map)?; |
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49 DirsMultiset::from_dirstate(&dirstate, skip_state) |
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50 } else { |
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51 let map: Result<Vec<Vec<u8>>, PyErr> = map |
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52 .iter(py)? |
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53 .map(|o| Ok(o?.extract::<PyBytes>(py)?.data(py).to_owned())) |
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54 .collect(); |
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55 DirsMultiset::from_manifest(&map?) |
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56 }; |
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57 |
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58 Self::create_instance( |
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59 py, |
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60 PySharedRefCell::new(inner), |
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61 PySharedState::default() |
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62 ) |
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63 } |
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64 |
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65 def addpath(&self, path: PyObject) -> PyResult<PyObject> { |
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66 self.borrow_mut(py)?.add_path( |
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67 path.extract::<PyBytes>(py)?.data(py), |
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68 ); |
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69 Ok(py.None()) |
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70 } |
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71 |
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72 def delpath(&self, path: PyObject) -> PyResult<PyObject> { |
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73 self.borrow_mut(py)?.delete_path( |
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74 path.extract::<PyBytes>(py)?.data(py), |
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75 ) |
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76 .and(Ok(py.None())) |
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77 .or_else(|e| { |
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78 match e { |
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79 DirstateMapError::PathNotFound(_p) => { |
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80 Err(PyErr::new::<exc::ValueError, _>( |
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81 py, |
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82 "expected a value, found none".to_string(), |
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83 )) |
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84 } |
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85 DirstateMapError::EmptyPath => { |
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86 Ok(py.None()) |
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87 } |
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88 } |
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89 }) |
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90 } |
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91 def __iter__(&self) -> PyResult<DirsMultisetKeysIterator> { |
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92 let (leak_handle, leaked_ref) = unsafe { self.leak_immutable(py)? }; |
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93 DirsMultisetKeysIterator::create_instance( |
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94 py, |
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95 RefCell::new(Some(leak_handle)), |
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96 RefCell::new(leaked_ref.iter()), |
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97 ) |
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98 } |
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99 |
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100 def __contains__(&self, item: PyObject) -> PyResult<bool> { |
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101 Ok(self |
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102 .inner(py) |
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103 .borrow() |
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104 .contains(item.extract::<PyBytes>(py)?.data(py).as_ref())) |
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105 } |
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106 }); |
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107 |
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108 py_shared_ref!(Dirs, DirsMultiset, inner, DirsMultisetLeakedRef,); |
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109 |
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110 impl Dirs { |
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111 pub fn from_inner(py: Python, d: DirsMultiset) -> PyResult<Self> { |
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112 Self::create_instance( |
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113 py, |
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114 PySharedRefCell::new(d), |
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115 PySharedState::default(), |
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116 ) |
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117 } |
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118 |
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119 fn translate_key(py: Python, res: &Vec<u8>) -> PyResult<Option<PyBytes>> { |
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120 Ok(Some(PyBytes::new(py, res))) |
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121 } |
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122 } |
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123 |
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124 py_shared_iterator_impl!( |
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125 DirsMultisetKeysIterator, |
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126 DirsMultisetLeakedRef, |
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127 DirsMultisetIter<'static>, |
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128 Dirs::translate_key, |
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129 Option<PyBytes> |
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130 ); |