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
|
// Copyright 2012 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/ast/modules.h"
#include "src/ast/ast-value-factory.h"
#include "src/ast/scopes.h"
namespace v8 {
namespace internal {
void ModuleDescriptor::AddImport(
const AstRawString* import_name, const AstRawString* local_name,
const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(import_name);
DCHECK_NOT_NULL(local_name);
DCHECK_NOT_NULL(module_request);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->local_name = local_name;
entry->import_name = import_name;
entry->module_request = module_request;
regular_imports_.insert(std::make_pair(entry->local_name, entry));
// We don't care if there's already an entry for this local name, as in that
// case we will report an error when declaring the variable.
}
void ModuleDescriptor::AddStarImport(
const AstRawString* local_name, const AstRawString* module_request,
Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(local_name);
DCHECK_NOT_NULL(module_request);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->local_name = local_name;
entry->module_request = module_request;
special_imports_.Add(entry, zone);
}
void ModuleDescriptor::AddEmptyImport(
const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(module_request);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->module_request = module_request;
special_imports_.Add(entry, zone);
}
void ModuleDescriptor::AddExport(
const AstRawString* local_name, const AstRawString* export_name,
Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(local_name);
DCHECK_NOT_NULL(export_name);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->export_name = export_name;
entry->local_name = local_name;
exports_.Add(entry, zone);
}
void ModuleDescriptor::AddExport(
const AstRawString* import_name, const AstRawString* export_name,
const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(import_name);
DCHECK_NOT_NULL(export_name);
DCHECK_NOT_NULL(module_request);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->export_name = export_name;
entry->import_name = import_name;
entry->module_request = module_request;
exports_.Add(entry, zone);
}
void ModuleDescriptor::AddStarExport(
const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
DCHECK_NOT_NULL(module_request);
ModuleEntry* entry = new (zone) ModuleEntry(loc);
entry->module_request = module_request;
exports_.Add(entry, zone);
}
void ModuleDescriptor::MakeIndirectExportsExplicit() {
for (auto entry : exports_) {
if (entry->export_name == nullptr) continue;
if (entry->import_name != nullptr) continue;
DCHECK_NOT_NULL(entry->local_name);
auto it = regular_imports_.find(entry->local_name);
if (it != regular_imports_.end()) {
// Found an indirect export.
DCHECK_NOT_NULL(it->second->module_request);
DCHECK_NOT_NULL(it->second->import_name);
entry->import_name = it->second->import_name;
entry->module_request = it->second->module_request;
entry->local_name = nullptr;
}
}
}
bool ModuleDescriptor::Validate(ModuleScope* module_scope,
PendingCompilationErrorHandler* error_handler,
Zone* zone) {
DCHECK_EQ(this, module_scope->module());
DCHECK_NOT_NULL(error_handler);
// Report error iff there are duplicate exports.
{
ZoneAllocationPolicy allocator(zone);
ZoneHashMap* export_names = new (zone->New(sizeof(ZoneHashMap)))
ZoneHashMap(ZoneHashMap::PointersMatch,
ZoneHashMap::kDefaultHashMapCapacity, allocator);
for (auto entry : exports_) {
if (entry->export_name == nullptr) continue;
AstRawString* key = const_cast<AstRawString*>(entry->export_name);
ZoneHashMap::Entry* p =
export_names->LookupOrInsert(key, key->hash(), allocator);
DCHECK_NOT_NULL(p);
if (p->value != nullptr) {
error_handler->ReportMessageAt(
entry->location.beg_pos, entry->location.end_pos,
MessageTemplate::kDuplicateExport, entry->export_name);
return false;
}
p->value = key; // Anything but nullptr.
}
}
// Report error iff there are exports of non-existent local names.
for (auto entry : exports_) {
if (entry->local_name == nullptr) continue;
if (module_scope->LookupLocal(entry->local_name) == nullptr) {
error_handler->ReportMessageAt(
entry->location.beg_pos, entry->location.end_pos,
MessageTemplate::kModuleExportUndefined, entry->local_name);
return false;
}
}
MakeIndirectExportsExplicit();
return true;
}
} // namespace internal
} // namespace v8
|
