1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
//! A type that represents the union of a set of regular expressions.
#![deny(clippy::missing_docs_in_private_items)]
use regex::RegexSet as RxSet;
use std::cell::Cell;
/// A dynamic set of regular expressions.
#[derive(Clone, Debug, Default)]
pub struct RegexSet {
items: Vec<Box<str>>,
/// Whether any of the items in the set was ever matched. The length of this
/// vector is exactly the length of `items`.
matched: Vec<Cell<bool>>,
set: Option<RxSet>,
/// Whether we should record matching items in the `matched` vector or not.
record_matches: bool,
}
impl RegexSet {
/// Create a new RegexSet
pub fn new() -> RegexSet {
RegexSet::default()
}
/// Is this set empty?
pub fn is_empty(&self) -> bool {
self.items.is_empty()
}
/// Insert a new regex into this set.
pub fn insert<S>(&mut self, string: S)
where
S: AsRef<str>,
{
self.items.push(string.as_ref().to_owned().into_boxed_str());
self.matched.push(Cell::new(false));
self.set = None;
}
/// Returns slice of String from its field 'items'
pub fn get_items(&self) -> &[Box<str>] {
&self.items
}
/// Returns an iterator over regexes in the set which didn't match any
/// strings yet.
pub fn unmatched_items(&self) -> impl Iterator<Item = &str> {
self.items.iter().enumerate().filter_map(move |(i, item)| {
if !self.record_matches || self.matched[i].get() {
return None;
}
Some(item.as_ref())
})
}
/// Construct a RegexSet from the set of entries we've accumulated.
///
/// Must be called before calling `matches()`, or it will always return
/// false.
#[inline]
pub fn build(&mut self, record_matches: bool) {
self.build_inner(record_matches, None)
}
#[cfg(all(feature = "__cli", feature = "experimental"))]
/// Construct a RegexSet from the set of entries we've accumulated and emit diagnostics if the
/// name of the regex set is passed to it.
///
/// Must be called before calling `matches()`, or it will always return
/// false.
#[inline]
pub fn build_with_diagnostics(
&mut self,
record_matches: bool,
name: Option<&'static str>,
) {
self.build_inner(record_matches, name)
}
#[cfg(all(not(feature = "__cli"), feature = "experimental"))]
/// Construct a RegexSet from the set of entries we've accumulated and emit diagnostics if the
/// name of the regex set is passed to it.
///
/// Must be called before calling `matches()`, or it will always return
/// false.
#[inline]
pub(crate) fn build_with_diagnostics(
&mut self,
record_matches: bool,
name: Option<&'static str>,
) {
self.build_inner(record_matches, name)
}
fn build_inner(
&mut self,
record_matches: bool,
_name: Option<&'static str>,
) {
let items = self.items.iter().map(|item| format!("^({})$", item));
self.record_matches = record_matches;
self.set = match RxSet::new(items) {
Ok(x) => Some(x),
Err(e) => {
warn!("Invalid regex in {:?}: {:?}", self.items, e);
#[cfg(feature = "experimental")]
if let Some(name) = _name {
invalid_regex_warning(self, e, name);
}
None
}
}
}
/// Does the given `string` match any of the regexes in this set?
pub fn matches<S>(&self, string: S) -> bool
where
S: AsRef<str>,
{
let s = string.as_ref();
let set = match self.set {
Some(ref set) => set,
None => return false,
};
if !self.record_matches {
return set.is_match(s);
}
let matches = set.matches(s);
if !matches.matched_any() {
return false;
}
for i in matches.iter() {
self.matched[i].set(true);
}
true
}
}
#[cfg(feature = "experimental")]
fn invalid_regex_warning(
set: &RegexSet,
err: regex::Error,
name: &'static str,
) {
use crate::diagnostics::{Diagnostic, Level, Slice};
let mut diagnostic = Diagnostic::default();
match err {
regex::Error::Syntax(string) => {
if string.starts_with("regex parse error:\n") {
let mut source = String::new();
let mut parsing_source = true;
for line in string.lines().skip(1) {
if parsing_source {
if line.starts_with(' ') {
source.push_str(line);
source.push('\n');
continue;
}
parsing_source = false;
}
let error = "error: ";
if line.starts_with(error) {
let (_, msg) = line.split_at(error.len());
diagnostic.add_annotation(msg.to_owned(), Level::Error);
} else {
diagnostic.add_annotation(line.to_owned(), Level::Info);
}
}
let mut slice = Slice::default();
slice.with_source(source);
diagnostic.add_slice(slice);
diagnostic.with_title(
"Error while parsing a regular expression.",
Level::Warn,
);
} else {
diagnostic.with_title(string, Level::Warn);
}
}
err => {
let err = err.to_string();
diagnostic.with_title(err, Level::Warn);
}
}
diagnostic.add_annotation(
format!("This regular expression was passed via `{}`.", name),
Level::Note,
);
if set.items.iter().any(|item| item.as_ref() == "*") {
diagnostic.add_annotation("Wildcard patterns \"*\" are no longer considered valid. Use \".*\" instead.", Level::Help);
}
diagnostic.display();
}
|
