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annotate rust/hg-core/src/lib.rs @ 42886:7083ac37314f

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rust-dirstate: provide CopyMapIter and StateMapIter types They will be used in the declaration of Python iterator types.
author Yuya Nishihara <yuya@tcha.org>
date Sun, 08 Sep 2019 12:00:26 +0900
parents a03a29462c0a
children 7a01778bc7b7
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1 // Copyright 2018 Georges Racinet <gracinet@anybox.fr>
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2 //
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3 // This software may be used and distributed according to the terms of the
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4 // GNU General Public License version 2 or any later version.
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5 mod ancestors;
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6 pub mod dagops;
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7 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
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8 mod dirstate;
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9 pub mod discovery;
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10 pub mod testing; // unconditionally built, for use from integration tests
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11 pub use dirstate::{
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12 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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13 dirstate_map::DirstateMap,
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14 parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
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15 CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,
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16 StateMap, StateMapIter,
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17 };
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18 mod filepatterns;
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19 pub mod utils;
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20
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21 pub use filepatterns::{
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22 build_single_regex, read_pattern_file, PatternSyntax, PatternTuple,
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23 };
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24
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25 /// Mercurial revision numbers
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26 ///
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27 /// As noted in revlog.c, revision numbers are actually encoded in
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28 /// 4 bytes, and are liberally converted to ints, whence the i32
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29 pub type Revision = i32;
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30
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31 /// Marker expressing the absence of a parent
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32 ///
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33 /// Independently of the actual representation, `NULL_REVISION` is guaranteed
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34 /// to be smaller that all existing revisions.
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35 pub const NULL_REVISION: Revision = -1;
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36
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37 /// Same as `mercurial.node.wdirrev`
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38 ///
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39 /// This is also equal to `i32::max_value()`, but it's better to spell
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40 /// it out explicitely, same as in `mercurial.node`
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41 pub const WORKING_DIRECTORY_REVISION: Revision = 0x7fffffff;
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42
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43 /// The simplest expression of what we need of Mercurial DAGs.
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44 pub trait Graph {
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45 /// Return the two parents of the given `Revision`.
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46 ///
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47 /// Each of the parents can be independently `NULL_REVISION`
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48 fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError>;
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49 }
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50
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51 pub type LineNumber = usize;
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52
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53 #[derive(Clone, Debug, PartialEq)]
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54 pub enum GraphError {
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55 ParentOutOfRange(Revision),
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56 WorkingDirectoryUnsupported,
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57 }
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58
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59 #[derive(Clone, Debug, PartialEq)]
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60 pub enum DirstateParseError {
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61 TooLittleData,
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62 Overflow,
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63 CorruptedEntry(String),
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64 Damaged,
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65 }
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66
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67 impl From<std::io::Error> for DirstateParseError {
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68 fn from(e: std::io::Error) -> Self {
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69 DirstateParseError::CorruptedEntry(e.to_string())
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70 }
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71 }
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72
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73 impl ToString for DirstateParseError {
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74 fn to_string(&self) -> String {
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75 use crate::DirstateParseError::*;
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76 match self {
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77 TooLittleData => "Too little data for dirstate.".to_string(),
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78 Overflow => "Overflow in dirstate.".to_string(),
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79 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),
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80 Damaged => "Dirstate appears to be damaged.".to_string(),
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81 }
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82 }
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83 }
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84
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85 #[derive(Debug, PartialEq)]
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86 pub enum DirstatePackError {
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87 CorruptedEntry(String),
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88 CorruptedParent,
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89 BadSize(usize, usize),
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90 }
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91
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92 impl From<std::io::Error> for DirstatePackError {
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93 fn from(e: std::io::Error) -> Self {
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94 DirstatePackError::CorruptedEntry(e.to_string())
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95 }
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96 }
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97 #[derive(Debug, PartialEq)]
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98 pub enum DirstateMapError {
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99 PathNotFound(Vec<u8>),
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100 EmptyPath,
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101 }
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102
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103 pub enum DirstateError {
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104 Parse(DirstateParseError),
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105 Pack(DirstatePackError),
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106 Map(DirstateMapError),
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107 IO(std::io::Error),
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108 }
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109
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110 impl From<DirstateParseError> for DirstateError {
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111 fn from(e: DirstateParseError) -> Self {
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112 DirstateError::Parse(e)
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113 }
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114 }
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115
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116 impl From<DirstatePackError> for DirstateError {
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117 fn from(e: DirstatePackError) -> Self {
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118 DirstateError::Pack(e)
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119 }
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120 }
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121
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122 #[derive(Debug)]
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123 pub enum PatternError {
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124 UnsupportedSyntax(String),
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125 }
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126
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127 #[derive(Debug)]
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128 pub enum PatternFileError {
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129 IO(std::io::Error),
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130 Pattern(PatternError, LineNumber),
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131 }
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132
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133 impl From<std::io::Error> for PatternFileError {
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134 fn from(e: std::io::Error) -> Self {
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135 PatternFileError::IO(e)
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136 }
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137 }
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138
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139 impl From<DirstateMapError> for DirstateError {
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140 fn from(e: DirstateMapError) -> Self {
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141 DirstateError::Map(e)
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142 }
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143 }
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144
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145 impl From<std::io::Error> for DirstateError {
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146 fn from(e: std::io::Error) -> Self {
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147 DirstateError::IO(e)
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148 }
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149 }