V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
template-objects.cc
1 // Copyright 2017 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 #include "src/objects/template-objects.h"
6 
7 #include "src/heap/factory.h"
8 #include "src/isolate.h"
9 #include "src/objects-inl.h"
10 #include "src/property-descriptor.h"
11 
12 namespace v8 {
13 namespace internal {
14 
15 // static
16 Handle<JSArray> TemplateObjectDescription::CreateTemplateObject(
17  Isolate* isolate, Handle<TemplateObjectDescription> description) {
18  // Create the raw object from the {raw_strings}.
19  Handle<FixedArray> raw_strings(description->raw_strings(), isolate);
20  Handle<JSArray> raw_object = isolate->factory()->NewJSArrayWithElements(
21  raw_strings, PACKED_ELEMENTS, raw_strings->length(), TENURED);
22 
23  // Create the template object from the {cooked_strings}.
24  Handle<FixedArray> cooked_strings(description->cooked_strings(), isolate);
25  Handle<JSArray> template_object = isolate->factory()->NewJSArrayWithElements(
26  cooked_strings, PACKED_ELEMENTS, cooked_strings->length(), TENURED);
27 
28  // Freeze the {raw_object}.
29  JSObject::SetIntegrityLevel(raw_object, FROZEN, kThrowOnError).ToChecked();
30 
31  // Install a "raw" data property for {raw_object} on {template_object}.
32  PropertyDescriptor raw_desc;
33  raw_desc.set_value(raw_object);
34  raw_desc.set_configurable(false);
35  raw_desc.set_enumerable(false);
36  raw_desc.set_writable(false);
37  JSArray::DefineOwnProperty(isolate, template_object,
38  isolate->factory()->raw_string(), &raw_desc,
39  kThrowOnError)
40  .ToChecked();
41 
42  // Freeze the {template_object} as well.
43  JSObject::SetIntegrityLevel(template_object, FROZEN, kThrowOnError)
44  .ToChecked();
45 
46  return template_object;
47 }
48 
49 } // namespace internal
50 } // namespace v8
Definition: libplatform.h:13