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annotate rust/hg-core/src/lib.rs @ 46127:c58c8f1d63b1

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copies-rust: hide most of the comparison details inside a closure The function that compares values needs various supporting elements that are the same for each call. We are about to both make change to these element and change to call sites in our upcoming work. So abstracting most of the details will help to avoid conflict while these works happen in parallel. Differential Revision: https://phab.mercurial-scm.org/D9426
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sat, 21 Nov 2020 10:50:14 +0100
parents 595979dc924e
children 8a4914397d02
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1 // Copyright 2018-2020 Georges Racinet <georges.racinet@octobus.net>
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2 // and Mercurial contributors
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3 //
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4 // This software may be used and distributed according to the terms of the
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5 // GNU General Public License version 2 or any later version.
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6 mod ancestors;
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7 pub mod dagops;
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8 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
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9 mod dirstate;
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10 pub mod discovery;
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11 pub mod requirements;
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12 pub mod testing; // unconditionally built, for use from integration tests
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13 pub use dirstate::{
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14 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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15 dirstate_map::DirstateMap,
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16 parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
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17 status::{
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18 status, BadMatch, BadType, DirstateStatus, StatusError, StatusOptions,
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19 },
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20 CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,
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21 StateMap, StateMapIter,
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22 };
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23 pub mod copy_tracing;
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24 mod filepatterns;
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25 pub mod matchers;
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26 pub mod revlog;
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27 pub use revlog::*;
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28 pub mod operations;
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29 pub mod utils;
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30
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31 // Remove this to see (potential) non-artificial compile failures. MacOS
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32 // *should* compile, but fail to compile tests for example as of 2020-03-06
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33 #[cfg(not(target_os = "linux"))]
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34 compile_error!(
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35 "`hg-core` has only been tested on Linux and will most \
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36 likely not behave correctly on other platforms."
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37 );
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38
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39 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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40 pub use filepatterns::{
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41 parse_pattern_syntax, read_pattern_file, IgnorePattern,
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42 PatternFileWarning, PatternSyntax,
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43 };
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44 use std::collections::HashMap;
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45 use twox_hash::RandomXxHashBuilder64;
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46
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47 /// This is a contract between the `micro-timer` crate and us, to expose
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48 /// the `log` crate as `crate::log`.
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49 use log;
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50
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51 pub type LineNumber = usize;
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52
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53 /// Rust's default hasher is too slow because it tries to prevent collision
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54 /// attacks. We are not concerned about those: if an ill-minded person has
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55 /// write access to your repository, you have other issues.
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56 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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57
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58 #[derive(Clone, Debug, PartialEq)]
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59 pub enum DirstateParseError {
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60 TooLittleData,
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61 Overflow,
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62 // TODO refactor to use bytes instead of String
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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(HgPathBuf),
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100 EmptyPath,
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101 InvalidPath(HgPathError),
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102 }
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103
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104 impl ToString for DirstateMapError {
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105 fn to_string(&self) -> String {
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106 match self {
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107 DirstateMapError::PathNotFound(_) => {
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108 "expected a value, found none".to_string()
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109 }
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110 DirstateMapError::EmptyPath => "Overflow in dirstate.".to_string(),
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111 DirstateMapError::InvalidPath(e) => e.to_string(),
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112 }
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113 }
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114 }
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115
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116 #[derive(Debug)]
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117 pub enum DirstateError {
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118 Parse(DirstateParseError),
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119 Pack(DirstatePackError),
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120 Map(DirstateMapError),
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121 IO(std::io::Error),
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122 }
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123
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124 impl From<DirstateParseError> for DirstateError {
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125 fn from(e: DirstateParseError) -> Self {
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126 DirstateError::Parse(e)
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127 }
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128 }
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129
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130 impl From<DirstatePackError> for DirstateError {
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131 fn from(e: DirstatePackError) -> Self {
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132 DirstateError::Pack(e)
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133 }
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134 }
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135
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136 #[derive(Debug)]
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137 pub enum PatternError {
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138 Path(HgPathError),
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139 UnsupportedSyntax(String),
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140 UnsupportedSyntaxInFile(String, String, usize),
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141 TooLong(usize),
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142 IO(std::io::Error),
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143 /// Needed a pattern that can be turned into a regex but got one that
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144 /// can't. This should only happen through programmer error.
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145 NonRegexPattern(IgnorePattern),
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146 }
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147
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148 impl ToString for PatternError {
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149 fn to_string(&self) -> String {
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150 match self {
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151 PatternError::UnsupportedSyntax(syntax) => {
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152 format!("Unsupported syntax {}", syntax)
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153 }
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154 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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155 format!(
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156 "{}:{}: unsupported syntax {}",
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157 file_path, line, syntax
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158 )
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159 }
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160 PatternError::TooLong(size) => {
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161 format!("matcher pattern is too long ({} bytes)", size)
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162 }
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163 PatternError::IO(e) => e.to_string(),
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164 PatternError::Path(e) => e.to_string(),
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165 PatternError::NonRegexPattern(pattern) => {
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166 format!("'{:?}' cannot be turned into a regex", pattern)
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167 }
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168 }
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169 }
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170 }
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171
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172 impl From<DirstateMapError> for DirstateError {
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173 fn from(e: DirstateMapError) -> Self {
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174 DirstateError::Map(e)
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175 }
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176 }
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177
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178 impl From<std::io::Error> for DirstateError {
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179 fn from(e: std::io::Error) -> Self {
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180 DirstateError::IO(e)
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181 }
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182 }
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183
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184 impl From<std::io::Error> for PatternError {
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185 fn from(e: std::io::Error) -> Self {
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186 PatternError::IO(e)
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187 }
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188 }
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189
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190 impl From<HgPathError> for PatternError {
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191 fn from(e: HgPathError) -> Self {
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192 PatternError::Path(e)
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193 }
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194 }