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Issue 1398733002: Move builtin JavaScript sources into own directory. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Also move macros.py file. Created 5 years, 2 months ago
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1 // Copyright 2014 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 (function(global, utils) {
6
7 "use strict";
8
9 %CheckIsBootstrapping();
10
11 // -------------------------------------------------------------------
12 // Imports
13
14 var GlobalString = global.String;
15 var iteratorSymbol = utils.ImportNow("iterator_symbol");
16 var stringIteratorIteratedStringSymbol =
17 utils.ImportNow("string_iterator_iterated_string_symbol");
18 var stringIteratorNextIndexSymbol =
19 utils.ImportNow("string_iterator_next_index_symbol");
20 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
21
22 // -------------------------------------------------------------------
23
24 function StringIterator() {}
25
26
27 // 21.1.5.1 CreateStringIterator Abstract Operation
28 function CreateStringIterator(string) {
29 var s = TO_STRING(string);
30 var iterator = new StringIterator;
31 SET_PRIVATE(iterator, stringIteratorIteratedStringSymbol, s);
32 SET_PRIVATE(iterator, stringIteratorNextIndexSymbol, 0);
33 return iterator;
34 }
35
36
37 // ES6 section 21.1.5.2.1 %StringIteratorPrototype%.next ( )
38 function StringIteratorNext() {
39 var iterator = this;
40 var value = UNDEFINED;
41 var done = true;
42
43 if (!IS_SPEC_OBJECT(iterator) ||
44 !HAS_DEFINED_PRIVATE(iterator, stringIteratorNextIndexSymbol)) {
45 throw MakeTypeError(kIncompatibleMethodReceiver,
46 'String Iterator.prototype.next');
47 }
48
49 var s = GET_PRIVATE(iterator, stringIteratorIteratedStringSymbol);
50 if (!IS_UNDEFINED(s)) {
51 var position = GET_PRIVATE(iterator, stringIteratorNextIndexSymbol);
52 var length = TO_UINT32(s.length);
53 if (position >= length) {
54 SET_PRIVATE(iterator, stringIteratorIteratedStringSymbol, UNDEFINED);
55 } else {
56 var first = %_StringCharCodeAt(s, position);
57 value = %_StringCharFromCode(first);
58 done = false;
59 position++;
60
61 if (first >= 0xD800 && first <= 0xDBFF && position < length) {
62 var second = %_StringCharCodeAt(s, position);
63 if (second >= 0xDC00 && second <= 0xDFFF) {
64 value += %_StringCharFromCode(second);
65 position++;
66 }
67 }
68
69 SET_PRIVATE(iterator, stringIteratorNextIndexSymbol, position);
70 }
71 }
72 return %_CreateIterResultObject(value, done);
73 }
74
75
76 // 21.1.3.27 String.prototype [ @@iterator ]( )
77 function StringPrototypeIterator() {
78 return CreateStringIterator(this);
79 }
80
81 //-------------------------------------------------------------------
82
83 %FunctionSetPrototype(StringIterator, {__proto__: $iteratorPrototype});
84 %FunctionSetInstanceClassName(StringIterator, 'String Iterator');
85
86 utils.InstallFunctions(StringIterator.prototype, DONT_ENUM, [
87 'next', StringIteratorNext
88 ]);
89 %AddNamedProperty(StringIterator.prototype, toStringTagSymbol,
90 "String Iterator", READ_ONLY | DONT_ENUM);
91
92 utils.SetFunctionName(StringPrototypeIterator, iteratorSymbol);
93 %AddNamedProperty(GlobalString.prototype, iteratorSymbol,
94 StringPrototypeIterator, DONT_ENUM);
95
96 })
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