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
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Reference.h>
namespace JS {
void Reference::put(GlobalObject& global_object, Value value)
{
auto& vm = global_object.vm();
if (is_unresolvable()) {
throw_reference_error(global_object);
return;
}
if (is_local_variable() || is_global_variable()) {
if (is_local_variable())
vm.set_variable(m_name.to_string(), value, global_object);
else
global_object.put(m_name, value);
return;
}
auto base = this->base();
if (!base.is_object() && vm.in_strict_mode()) {
if (base.is_nullish())
vm.throw_exception<TypeError>(global_object, ErrorType::ReferenceNullishAssignment, m_name.to_value(global_object.vm()).to_string_without_side_effects(), base.to_string_without_side_effects());
else
vm.throw_exception<TypeError>(global_object, ErrorType::ReferencePrimitiveAssignment, m_name.to_value(global_object.vm()).to_string_without_side_effects(), base.typeof(), base.to_string_without_side_effects());
return;
}
if (base.is_nullish()) {
// This will always fail the to_object() call below, let's throw the TypeError ourselves with a nice message instead.
vm.throw_exception<TypeError>(global_object, ErrorType::ReferenceNullishAssignment, m_name.to_value(global_object.vm()).to_string_without_side_effects(), base.to_string_without_side_effects());
return;
}
auto* object = base.to_object(global_object);
if (!object)
return;
object->put(m_name, value);
}
void Reference::throw_reference_error(GlobalObject& global_object)
{
auto& vm = global_object.vm();
if (!m_name.is_valid())
vm.throw_exception<ReferenceError>(global_object, ErrorType::ReferenceUnresolvable);
else
vm.throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, m_name.to_string_or_symbol().to_display_string());
}
Value Reference::get(GlobalObject& global_object)
{
auto& vm = global_object.vm();
if (is_unresolvable()) {
throw_reference_error(global_object);
return {};
}
if (is_local_variable() || is_global_variable()) {
Value value;
if (is_local_variable())
value = vm.get_variable(m_name.to_string(), global_object);
else
value = global_object.get(m_name);
if (vm.exception())
return {};
if (value.is_empty()) {
throw_reference_error(global_object);
return {};
}
return value;
}
auto* object = base().to_object(global_object);
if (!object)
return {};
return object->get(m_name).value_or(js_undefined());
}
}
|
