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
|
// Copyright 2011 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/v8.h"
#include "src/ast.h"
#include "src/func-name-inferrer.h"
#include "src/list-inl.h"
namespace v8 {
namespace internal {
FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone)
: isolate_(isolate),
entries_stack_(10, zone),
names_stack_(5, zone),
funcs_to_infer_(4, zone),
zone_(zone) {
}
void FuncNameInferrer::PushEnclosingName(Handle<String> name) {
// Enclosing name is a name of a constructor function. To check
// that it is really a constructor, we check that it is not empty
// and starts with a capital letter.
if (name->length() > 0 && Runtime::IsUpperCaseChar(
isolate()->runtime_state(), name->Get(0))) {
names_stack_.Add(Name(name, kEnclosingConstructorName), zone());
}
}
void FuncNameInferrer::PushLiteralName(Handle<String> name) {
if (IsOpen() &&
!String::Equals(isolate()->factory()->prototype_string(), name)) {
names_stack_.Add(Name(name, kLiteralName), zone());
}
}
void FuncNameInferrer::PushVariableName(Handle<String> name) {
if (IsOpen() &&
!String::Equals(isolate()->factory()->dot_result_string(), name)) {
names_stack_.Add(Name(name, kVariableName), zone());
}
}
Handle<String> FuncNameInferrer::MakeNameFromStack() {
return MakeNameFromStackHelper(0, isolate()->factory()->empty_string());
}
Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
Handle<String> prev) {
if (pos >= names_stack_.length()) return prev;
if (pos < names_stack_.length() - 1 &&
names_stack_.at(pos).type == kVariableName &&
names_stack_.at(pos + 1).type == kVariableName) {
// Skip consecutive variable declarations.
return MakeNameFromStackHelper(pos + 1, prev);
} else {
if (prev->length() > 0) {
Handle<String> name = names_stack_.at(pos).name;
if (prev->length() + name->length() + 1 > String::kMaxLength) return prev;
Factory* factory = isolate()->factory();
Handle<String> curr =
factory->NewConsString(factory->dot_string(), name).ToHandleChecked();
curr = factory->NewConsString(prev, curr).ToHandleChecked();
return MakeNameFromStackHelper(pos + 1, curr);
} else {
return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name);
}
}
}
void FuncNameInferrer::InferFunctionsNames() {
Handle<String> func_name = MakeNameFromStack();
for (int i = 0; i < funcs_to_infer_.length(); ++i) {
funcs_to_infer_[i]->set_inferred_name(func_name);
}
funcs_to_infer_.Rewind(0);
}
} } // namespace v8::internal
|
