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
|
// The Function.prototype.toString() representation of sourceless functions
// must match the NativeFunction syntax.
function test() {
// Greatly (!) simplified patterns for the PropertyName production.
var propertyName = [
// PropertyName :: LiteralPropertyName :: IdentifierName
"\\w+",
// PropertyName :: LiteralPropertyName :: StringLiteral
"(?:'[^']*')",
"(?:\"[^\"]*\")",
// PropertyName :: LiteralPropertyName :: NumericLiteral
"\\d+",
// PropertyName :: ComputedPropertyName
"(?:\\[[^\\]]+\\])",
].join("|")
var nativeCode = RegExp([
"^", "function", ("(?:" + propertyName + ")?"), "\\(", "\\)", "\\{", "\\[native code\\]", "\\}", "$"
].join("\\s*"));
function reportMatch(pattern, str) {
assertEq(pattern.test(str), true);
}
// Function declarations.
eval(`
function funDecl() {}
function* genDecl() {}
async function asyncFunDecl() {}
async function* asyncGenDecl() {}
`);
reportMatch(nativeCode, funDecl.toString());
reportMatch(nativeCode, genDecl.toString());
reportMatch(nativeCode, asyncFunDecl.toString());
reportMatch(nativeCode, asyncGenDecl.toString());
// Named function expressions.
eval(`
var funExpr = function fn() {};
var genExpr = function* fn() {};
var asyncFunExpr = async function fn() {};
var asyncGenExpr = async function* fn() {};
`);
reportMatch(nativeCode, funExpr.toString());
reportMatch(nativeCode, genExpr.toString());
reportMatch(nativeCode, asyncFunExpr.toString());
reportMatch(nativeCode, asyncGenExpr.toString());
// Anonymous function expressions.
eval(`
var funExprAnon = function() {};
var genExprAnon = function*() {};
var asyncFunExprAnon = async function() {};
var asyncGenExprAnon = async function*() {};
`);
reportMatch(nativeCode, funExprAnon.toString());
reportMatch(nativeCode, genExprAnon.toString());
reportMatch(nativeCode, asyncFunExprAnon.toString());
reportMatch(nativeCode, asyncGenExprAnon.toString());
// Class declarations and expressions (implicit constructor).
eval(`
class classDecl {}
var classExpr = class C {};
var classExprAnon = class {};
this.classDecl = classDecl;
`);
reportMatch(nativeCode, classDecl.toString());
reportMatch(nativeCode, classExpr.toString());
reportMatch(nativeCode, classExprAnon.toString());
// Class declarations and expressions (explicit constructor).
eval(`
class classDecl { constructor() {} }
var classExpr = class C { constructor() {} };
var classExprAnon = class { constructor() {} };
this.classDecl = classDecl;
`);
reportMatch(nativeCode, classDecl.toString());
reportMatch(nativeCode, classExpr.toString());
reportMatch(nativeCode, classExprAnon.toString());
// Method definitions (identifier names).
eval(`
var obj = {
m() {},
*gm() {},
async am() {},
async* agm() {},
get x() {},
set x(_) {},
};
`);
reportMatch(nativeCode, obj.m.toString());
reportMatch(nativeCode, obj.gm.toString());
reportMatch(nativeCode, obj.am.toString());
reportMatch(nativeCode, obj.agm.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, "x").get.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, "x").set.toString());
// Method definitions (string names).
eval(`
var obj = {
"foo m"() {},
* "foo gm"() {},
async "foo am"() {},
async* "foo agm"() {},
get "foo x"() {},
set "foo x"(_) {},
};
`);
reportMatch(nativeCode, obj["foo m"].toString());
reportMatch(nativeCode, obj["foo gm"].toString());
reportMatch(nativeCode, obj["foo am"].toString());
reportMatch(nativeCode, obj["foo agm"].toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, "foo x").get.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, "foo x").set.toString());
// Method definitions (number names).
eval(`
var obj = {
100() {},
*200() {},
async 300() {},
async* 400() {},
get 500() {},
set 500(_) {},
};
`);
reportMatch(nativeCode, obj[100].toString());
reportMatch(nativeCode, obj[200].toString());
reportMatch(nativeCode, obj[300].toString());
reportMatch(nativeCode, obj[400].toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, 500).get.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, 500).set.toString());
// Method definitions (computed property names).
var sym1 = Symbol();
var sym2 = Symbol("desc");
var sym3 = Symbol.for("reg-sym");
var sym4 = Symbol.match;
var sym5 = Symbol();
eval(`
var obj = {
[sym1]() {},
*[sym2]() {},
async [sym3]() {},
async* [sym4]() {},
get [sym5]() {},
set [sym5](_) {},
};
`);
reportMatch(nativeCode, obj[sym1].toString());
reportMatch(nativeCode, obj[sym2].toString());
reportMatch(nativeCode, obj[sym3].toString());
reportMatch(nativeCode, obj[sym4].toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, sym5).get.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(obj, sym5).set.toString());
// Arrow functions.
eval(`
var arrowFn = () => {};
var asyncArrowFn = () => {};
`);
reportMatch(nativeCode, arrowFn.toString());
reportMatch(nativeCode, asyncArrowFn.toString());
// asm.js functions.
eval(`
function asm() {
"use asm";
function f(){ return 0|0; }
return {f: f};
}
`);
reportMatch(nativeCode, asm.toString());
reportMatch(nativeCode, asm().f.toString());
}
var g = newGlobal({ discardSource: true });
g.evaluate(test.toString() + "test()");
|
