blob: a3868e95cd230b734345220a57e8280f98d93080 (
plain)
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
|
/*
* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <LibJS/AST.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/FunctionConstructor.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
FunctionConstructor::FunctionConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.Function, *global_object.function_prototype())
{
}
void FunctionConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
define_property(vm.names.prototype, global_object.function_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
}
FunctionConstructor::~FunctionConstructor()
{
}
Value FunctionConstructor::call()
{
return construct(*this);
}
Value FunctionConstructor::construct(Function&)
{
auto& vm = this->vm();
String parameters_source = "";
String body_source = "";
if (vm.argument_count() == 1) {
body_source = vm.argument(0).to_string(global_object());
if (vm.exception())
return {};
}
if (vm.argument_count() > 1) {
Vector<String> parameters;
for (size_t i = 0; i < vm.argument_count() - 1; ++i) {
parameters.append(vm.argument(i).to_string(global_object()));
if (vm.exception())
return {};
}
StringBuilder parameters_builder;
parameters_builder.join(',', parameters);
parameters_source = parameters_builder.build();
body_source = vm.argument(vm.argument_count() - 1).to_string(global_object());
if (vm.exception())
return {};
}
auto source = String::formatted("function anonymous({}\n) {{\n{}\n}}", parameters_source, body_source);
auto parser = Parser(Lexer(source));
auto function_expression = parser.parse_function_node<FunctionExpression>();
if (parser.has_errors()) {
auto error = parser.errors()[0];
vm.throw_exception<SyntaxError>(global_object(), error.to_string());
return {};
}
OwnPtr<Interpreter> local_interpreter;
Interpreter* interpreter = vm.interpreter_if_exists();
if (!interpreter) {
local_interpreter = Interpreter::create_with_existing_global_object(global_object());
interpreter = local_interpreter.ptr();
}
VM::InterpreterExecutionScope scope(*interpreter);
return function_expression->execute(*interpreter, global_object());
}
}
|
