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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
use indexmap::set::IndexSet;
/// Index into SourceAtomSet.atoms.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub struct SourceAtomSetIndex {
index: usize,
}
impl SourceAtomSetIndex {
fn new(index: usize) -> Self {
Self { index }
}
}
impl From<SourceAtomSetIndex> for usize {
fn from(index: SourceAtomSetIndex) -> usize {
index.index
}
}
// Call $handler macro with the list of common atoms.
//
// Basic Usage:
//
// ```
// for_all_common_atoms!(test);
// ```
//
// is expanded to
//
// ```
// test!(
// ("arguments", arguments, Arguments),
// ("async", async_, Async),
// ...
// );
// ```
//
// Extra Parameters:
//
// ```
// for_all_common_atoms!(test, foo, bar);
// ```
//
// is expanded to
//
// ```
// test!(
// foo, bar,
// ("arguments", arguments, Arguments),
// ("async", async_, Async),
// ...
// );
// ```
macro_rules! for_all_common_atoms {
($handler:ident $(, $($params:tt)*)?) => {
// string representation, method name, enum variant
$handler!(
$($($params)*,)?
("arguments", arguments, Arguments),
("as", as_, As),
("async", async_, Async),
("await", await_, Await),
("break", break_, Break),
("case", case, Case),
("catch", catch, Catch),
("class", class, Class),
("const", const_, Const),
("continue", continue_, Continue),
("debugger", debugger, Debugger),
("default", default, Default),
("delete", delete, Delete),
("do", do_, Do),
("else", else_, Else),
("enum", enum_, Enum),
("eval", eval, Eval),
("export", export, Export),
("extends", extends, Extends),
("false", false_, False),
("finally", finally, Finally),
("for", for_, For),
("from", from, From),
("function", function, Function),
("get", get, Get),
("if", if_, If),
("implements", implements, Implements),
("import", import, Import),
("in", in_, In),
("instanceof", instanceof, Instanceof),
("interface", interface, Interface),
("let", let_, Let),
("new", new_, New),
("null", null, Null),
("of", of, Of),
("package", package, Package),
("private", private, Private),
("protected", protected, Protected),
("public", public, Public),
("return", return_, Return),
("set", set, Set),
("static", static_, Static),
("super", super_, Super),
("switch", switch, Switch),
("target", target, Target),
("this", this, This),
("throw", throw, Throw),
("true", true_, True),
("try", try_, Try),
("typeof", typeof_, Typeof),
("var", var, Var),
("void", void, Void),
("while", while_, While),
("with", with, With),
("yield", yield_, Yield),
("use strict", use_strict, UseStrict),
("__proto__", __proto__, Proto),
);
}
}
// Define CommonAtoms enum, with
//
// enum CommonAtoms {
// Arguments = 0,
// Async,
// ...
// }
macro_rules! define_enum {
(($s0:tt, $method0:ident, $variant0:ident),
$(($s:tt, $method:ident, $variant:ident),)*) => {
enum CommonAtoms {
$variant0 = 0,
$($variant,)*
}
};
}
for_all_common_atoms!(define_enum);
// Define CommonSourceAtomSetIndices struct.
//
// impl CommonSourceAtomSetIndices {
// pub fn arguments() -> SourceAtomSetIndex { ... }
// pub fn async_() -> SourceAtomSetIndex { ... }
// ...
// }
macro_rules! define_struct {
($(($s:tt, $method:ident, $variant:ident),)*) => {
#[derive(Debug)]
pub struct CommonSourceAtomSetIndices {}
impl CommonSourceAtomSetIndices {
$(
pub fn $method() -> SourceAtomSetIndex {
SourceAtomSetIndex::new(CommonAtoms::$variant as usize)
}
)*
}
};
}
for_all_common_atoms!(define_struct);
/// Set of atoms, including the following:
///
/// * atoms referred from bytecode
/// * variable names referred from scope data
///
/// WARNING: This set itself does *NOT* map to JSScript::atoms().
#[derive(Debug)]
pub struct SourceAtomSet<'alloc> {
atoms: IndexSet<&'alloc str>,
}
impl<'alloc> SourceAtomSet<'alloc> {
// Create a set, with all common atoms inserted.
pub fn new() -> Self {
let mut result = Self {
atoms: IndexSet::new(),
};
result.insert_common_atoms();
result
}
// Insert all common atoms.
fn insert_common_atoms(&mut self) {
macro_rules! insert_atom {
($self: ident,
$(($s:tt, $method:ident, $variant:ident),)*) => {
$(
$self.atoms.insert($s);
)*
};
}
for_all_common_atoms!(insert_atom, self);
}
// Create a set, without any common atoms.
//
// This is for moving `SourceAtomSet` out of `Rc<RefCell>`, by replacing
// it with the result of this method.
pub fn new_uninitialized() -> Self {
Self {
// 256 is a number which should cover 75% of scripts without
// reallocation.
atoms: IndexSet::with_capacity(256),
}
}
pub fn insert(&mut self, s: &'alloc str) -> SourceAtomSetIndex {
let (index, _) = self.atoms.insert_full(s);
SourceAtomSetIndex::new(index)
}
pub fn get(&self, index: SourceAtomSetIndex) -> &'alloc str {
self.atoms.get_index(usize::from(index)).unwrap()
}
}
impl<'alloc> From<SourceAtomSet<'alloc>> for Vec<&'alloc str> {
fn from(set: SourceAtomSet<'alloc>) -> Vec<&'alloc str> {
set.atoms.into_iter().collect()
}
}
|
