author | Pierre-Yves David <pierre-yves.david@octobus.net> |
Tue, 28 Sep 2021 20:05:37 +0200 | |
changeset 48061 | 060cd909439f |
parent 48056 | cd13d3c2ad2e |
child 48068 | bf8837e3d7ce |
permissions | -rw-r--r-- |
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use std::path::PathBuf; |
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use crate::dirstate::parsers::Timestamp; |
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use crate::dirstate_tree::on_disk::DirstateV2ParseError; |
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use crate::matchers::Matcher; |
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use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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use crate::CopyMapIter; |
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use crate::DirstateEntry; |
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use crate::DirstateError; |
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use crate::DirstateMap; |
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use crate::DirstateParents; |
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use crate::DirstateStatus; |
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use crate::PatternFileWarning; |
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use crate::StateMapIter; |
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use crate::StatusError; |
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use crate::StatusOptions; |
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/// `rust/hg-cpython/src/dirstate/dirstate_map.rs` implements in Rust a |
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/// `DirstateMap` Python class that wraps `Box<dyn DirstateMapMethods + Send>`, |
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/// a trait object of this trait. Except for constructors, this trait defines |
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/// all APIs that the class needs to interact with its inner dirstate map. |
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/// |
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/// A trait object is used to support two different concrete types: |
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/// |
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/// * `rust/hg-core/src/dirstate/dirstate_map.rs` defines the "flat dirstate |
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/// map" which is based on a few large `HgPath`-keyed `HashMap` and `HashSet` |
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/// fields. |
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/// * `rust/hg-core/src/dirstate_tree/dirstate_map.rs` defines the "tree |
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/// dirstate map" based on a tree data struture with nodes for directories |
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/// containing child nodes for their files and sub-directories. This tree |
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/// enables a more efficient algorithm for `hg status`, but its details are |
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/// abstracted in this trait. |
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/// |
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/// The dirstate map associates paths of files in the working directory to |
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/// various information about the state of those files. |
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pub trait DirstateMapMethods { |
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/// Remove information about all files in this map |
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fn clear(&mut self); |
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/// Add the given filename to the map if it is not already there, and |
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/// associate the given entry with it. |
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fn set_entry( |
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&mut self, |
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filename: &HgPath, |
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entry: DirstateEntry, |
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) -> Result<(), DirstateV2ParseError>; |
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/// Add or change the information associated to a given file. |
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fn add_file( |
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&mut self, |
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filename: &HgPath, |
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entry: DirstateEntry, |
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) -> Result<(), DirstateError>; |
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/// Mark a file as "removed" (as in `hg rm`). |
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fn remove_file( |
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&mut self, |
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filename: &HgPath, |
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in_merge: bool, |
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) -> Result<(), DirstateError>; |
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/// Drop information about this file from the map if any. |
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/// |
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/// `get` will now return `None` for this filename. |
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fn drop_entry_and_copy_source( |
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&mut self, |
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filename: &HgPath, |
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) -> Result<(), DirstateError>; |
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/// Returns whether the sub-tree rooted at the given directory contains any |
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/// tracked file. |
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/// |
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/// A file is tracked if it has a `state` other than `EntryState::Removed`. |
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fn has_tracked_dir( |
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&mut self, |
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directory: &HgPath, |
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) -> Result<bool, DirstateError>; |
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/// Returns whether the sub-tree rooted at the given directory contains any |
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/// file with a dirstate entry. |
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fn has_dir(&mut self, directory: &HgPath) -> Result<bool, DirstateError>; |
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/// Clear mtimes equal to `now` in entries with `state == |
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/// EntryState::Normal`, and serialize bytes to write the `.hg/dirstate` |
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/// file to disk in dirstate-v1 format. |
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fn pack_v1( |
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&mut self, |
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parents: DirstateParents, |
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now: Timestamp, |
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) -> Result<Vec<u8>, DirstateError>; |
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/// Clear mtimes equal to `now` in entries with `state == |
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/// EntryState::Normal`, and serialize bytes to write a dirstate data file |
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/// to disk in dirstate-v2 format. |
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/// |
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/// Returns new data and metadata together with whether that data should be |
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/// appended to the existing data file whose content is at |
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/// `self.on_disk` (true), instead of written to a new data file |
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/// (false). |
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/// |
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101 |
/// Note: this is only supported by the tree dirstate map. |
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102 |
fn pack_v2( |
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&mut self, |
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104 |
now: Timestamp, |
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can_append: bool, |
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106 |
) -> Result<(Vec<u8>, Vec<u8>, bool), DirstateError>; |
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107 |
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108 |
/// Run the status algorithm. |
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/// |
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110 |
/// This is not sematically a method of the dirstate map, but a different |
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/// algorithm is used for the flat v.s. tree dirstate map so having it in |
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112 |
/// this trait enables the same dynamic dispatch as with other methods. |
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113 |
fn status<'a>( |
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&'a mut self, |
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matcher: &'a (dyn Matcher + Sync), |
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root_dir: PathBuf, |
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ignore_files: Vec<PathBuf>, |
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options: StatusOptions, |
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) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError>; |
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120 |
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/// Returns how many files in the dirstate map have a recorded copy source. |
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fn copy_map_len(&self) -> usize; |
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/// Returns an iterator of `(path, copy_source)` for all files that have a |
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125 |
/// copy source. |
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fn copy_map_iter(&self) -> CopyMapIter<'_>; |
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127 |
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/// Returns whether the givef file has a copy source. |
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fn copy_map_contains_key( |
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&self, |
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131 |
key: &HgPath, |
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) -> Result<bool, DirstateV2ParseError>; |
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133 |
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/// Returns the copy source for the given file. |
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135 |
fn copy_map_get( |
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&self, |
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137 |
key: &HgPath, |
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138 |
) -> Result<Option<&HgPath>, DirstateV2ParseError>; |
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139 |
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/// Removes the recorded copy source if any for the given file, and returns |
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141 |
/// it. |
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142 |
fn copy_map_remove( |
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143 |
&mut self, |
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144 |
key: &HgPath, |
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) -> Result<Option<HgPathBuf>, DirstateV2ParseError>; |
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146 |
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147 |
/// Set the given `value` copy source for the given `key` file. |
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148 |
fn copy_map_insert( |
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149 |
&mut self, |
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150 |
key: HgPathBuf, |
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151 |
value: HgPathBuf, |
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152 |
) -> Result<Option<HgPathBuf>, DirstateV2ParseError>; |
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153 |
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154 |
/// Returns the number of files that have an entry. |
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155 |
fn len(&self) -> usize; |
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156 |
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157 |
/// Returns whether the given file has an entry. |
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158 |
fn contains_key(&self, key: &HgPath) |
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159 |
-> Result<bool, DirstateV2ParseError>; |
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160 |
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161 |
/// Returns the entry, if any, for the given file. |
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162 |
fn get( |
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163 |
&self, |
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164 |
key: &HgPath, |
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165 |
) -> Result<Option<DirstateEntry>, DirstateV2ParseError>; |
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166 |
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167 |
/// Returns a `(path, entry)` iterator of files that have an entry. |
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168 |
/// |
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169 |
/// Because parse errors can happen during iteration, the iterated items |
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170 |
/// are `Result`s. |
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171 |
fn iter(&self) -> StateMapIter<'_>; |
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172 |
|
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173 |
/// Returns an iterator of tracked directories. |
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174 |
/// |
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175 |
/// This is the paths for which `has_tracked_dir` would return true. |
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176 |
/// Or, in other words, the union of ancestor paths of all paths that have |
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177 |
/// an associated entry in a "tracked" state in this dirstate map. |
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178 |
/// |
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179 |
/// Because parse errors can happen during iteration, the iterated items |
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180 |
/// are `Result`s. |
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181 |
fn iter_tracked_dirs( |
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182 |
&mut self, |
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183 |
) -> Result< |
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184 |
Box< |
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185 |
dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
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186 |
+ Send |
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187 |
+ '_, |
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188 |
>, |
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189 |
DirstateError, |
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190 |
>; |
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191 |
|
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192 |
/// Return an iterator of `(path, (state, mode, size, mtime))` for every |
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193 |
/// node stored in this dirstate map, for the purpose of the `hg |
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194 |
/// debugdirstate` command. |
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195 |
/// |
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196 |
/// If `all` is true, include nodes that don’t have an entry. |
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197 |
/// For such nodes `state` is the ASCII space. |
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198 |
/// An `mtime` may still be present. It is used to optimize `status`. |
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199 |
/// |
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200 |
/// Because parse errors can happen during iteration, the iterated items |
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/// are `Result`s. |
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fn debug_iter( |
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&self, |
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all: bool, |
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) -> Box< |
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206 |
dyn Iterator< |
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Item = Result< |
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(&HgPath, (u8, i32, i32, i32)), |
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DirstateV2ParseError, |
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210 |
>, |
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211 |
> + Send |
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212 |
+ '_, |
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213 |
>; |
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} |
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215 |
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impl DirstateMapMethods for DirstateMap { |
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fn clear(&mut self) { |
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self.clear() |
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} |
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|
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/// Used to set a value directory. |
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/// |
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/// XXX Is temporary during a refactor of V1 dirstate and will disappear |
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/// shortly. |
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fn set_entry( |
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226 |
&mut self, |
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filename: &HgPath, |
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228 |
entry: DirstateEntry, |
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) -> Result<(), DirstateV2ParseError> { |
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self.set_entry(&filename, entry); |
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231 |
Ok(()) |
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232 |
} |
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233 |
|
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234 |
fn add_file( |
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235 |
&mut self, |
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236 |
filename: &HgPath, |
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entry: DirstateEntry, |
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238 |
) -> Result<(), DirstateError> { |
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239 |
self.add_file(filename, entry) |
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240 |
} |
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241 |
|
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242 |
fn remove_file( |
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243 |
&mut self, |
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244 |
filename: &HgPath, |
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245 |
in_merge: bool, |
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246 |
) -> Result<(), DirstateError> { |
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247 |
self.remove_file(filename, in_merge) |
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248 |
} |
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249 |
|
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250 |
fn drop_entry_and_copy_source( |
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251 |
&mut self, |
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252 |
filename: &HgPath, |
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253 |
) -> Result<(), DirstateError> { |
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254 |
self.drop_entry_and_copy_source(filename) |
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255 |
} |
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256 |
|
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257 |
fn has_tracked_dir( |
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258 |
&mut self, |
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259 |
directory: &HgPath, |
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260 |
) -> Result<bool, DirstateError> { |
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261 |
self.has_tracked_dir(directory) |
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262 |
} |
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263 |
|
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264 |
fn has_dir(&mut self, directory: &HgPath) -> Result<bool, DirstateError> { |
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265 |
self.has_dir(directory) |
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266 |
} |
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267 |
|
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268 |
fn pack_v1( |
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269 |
&mut self, |
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270 |
parents: DirstateParents, |
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271 |
now: Timestamp, |
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272 |
) -> Result<Vec<u8>, DirstateError> { |
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273 |
Ok(self.pack(parents, now)?) |
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274 |
} |
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275 |
|
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276 |
fn pack_v2( |
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&mut self, |
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278 |
_now: Timestamp, |
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279 |
_can_append: bool, |
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280 |
) -> Result<(Vec<u8>, Vec<u8>, bool), DirstateError> { |
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281 |
panic!( |
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282 |
"should have used dirstate_tree::DirstateMap to use the v2 format" |
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283 |
) |
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284 |
} |
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285 |
|
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286 |
fn status<'a>( |
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287 |
&'a mut self, |
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288 |
matcher: &'a (dyn Matcher + Sync), |
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289 |
root_dir: PathBuf, |
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290 |
ignore_files: Vec<PathBuf>, |
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291 |
options: StatusOptions, |
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292 |
) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
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293 |
{ |
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294 |
crate::status(self, matcher, root_dir, ignore_files, options) |
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295 |
} |
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|
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fn copy_map_len(&self) -> usize { |
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298 |
self.copy_map.len() |
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} |
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|
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301 |
fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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302 |
Box::new( |
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303 |
self.copy_map |
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304 |
.iter() |
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305 |
.map(|(key, value)| Ok((&**key, &**value))), |
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306 |
) |
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307 |
} |
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308 |
|
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309 |
fn copy_map_contains_key( |
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310 |
&self, |
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311 |
key: &HgPath, |
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312 |
) -> Result<bool, DirstateV2ParseError> { |
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313 |
Ok(self.copy_map.contains_key(key)) |
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314 |
} |
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315 |
|
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316 |
fn copy_map_get( |
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317 |
&self, |
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318 |
key: &HgPath, |
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319 |
) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
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320 |
Ok(self.copy_map.get(key).map(|p| &**p)) |
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321 |
} |
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322 |
|
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323 |
fn copy_map_remove( |
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324 |
&mut self, |
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325 |
key: &HgPath, |
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326 |
) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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327 |
Ok(self.copy_map.remove(key)) |
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328 |
} |
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329 |
|
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330 |
fn copy_map_insert( |
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331 |
&mut self, |
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332 |
key: HgPathBuf, |
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333 |
value: HgPathBuf, |
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334 |
) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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335 |
Ok(self.copy_map.insert(key, value)) |
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336 |
} |
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337 |
|
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338 |
fn len(&self) -> usize { |
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339 |
(&**self).len() |
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340 |
} |
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341 |
|
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342 |
fn contains_key( |
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343 |
&self, |
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344 |
key: &HgPath, |
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345 |
) -> Result<bool, DirstateV2ParseError> { |
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346 |
Ok((&**self).contains_key(key)) |
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347 |
} |
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348 |
|
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349 |
fn get( |
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350 |
&self, |
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351 |
key: &HgPath, |
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352 |
) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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353 |
Ok((&**self).get(key).cloned()) |
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354 |
} |
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355 |
|
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356 |
fn iter(&self) -> StateMapIter<'_> { |
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357 |
Box::new((&**self).iter().map(|(key, value)| Ok((&**key, *value)))) |
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358 |
} |
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359 |
|
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360 |
fn iter_tracked_dirs( |
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361 |
&mut self, |
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362 |
) -> Result< |
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363 |
Box< |
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364 |
dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
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|
365 |
+ Send |
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366 |
+ '_, |
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|
367 |
>, |
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368 |
DirstateError, |
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|
369 |
> { |
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|
370 |
self.set_all_dirs()?; |
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|
371 |
Ok(Box::new( |
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372 |
self.all_dirs |
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|
373 |
.as_ref() |
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374 |
.unwrap() |
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375 |
.iter() |
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376 |
.map(|path| Ok(&**path)), |
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|
377 |
)) |
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|
378 |
} |
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|
379 |
|
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|
380 |
fn debug_iter( |
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381 |
&self, |
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|
382 |
all: bool, |
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383 |
) -> Box< |
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384 |
dyn Iterator< |
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385 |
Item = Result< |
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386 |
(&HgPath, (u8, i32, i32, i32)), |
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|
387 |
DirstateV2ParseError, |
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388 |
>, |
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389 |
> + Send |
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390 |
+ '_, |
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391 |
> { |
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392 |
// Not used for the flat (not tree-based) DirstateMap |
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393 |
let _ = all; |
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394 |
|
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395 |
Box::new( |
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396 |
(&**self) |
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397 |
.iter() |
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398 |
.map(|(path, entry)| Ok((&**path, entry.debug_tuple()))), |
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|
399 |
) |
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400 |
} |
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401 |
} |