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LibJS: Parse async generator functions

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davidot 2021-11-15 01:53:24 +01:00 • committed by Linus Groh
parent 5d0f666f22
commit 0982a73d1d
13 changed files with 270 additions and 40 deletions
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64
Userland/Libraries/LibJS/Runtime/AsyncGeneratorFunctionConstructor.cpp Normal file
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/*
* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/AsyncGeneratorFunctionConstructor.h>
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/FunctionConstructor.h>
#include <LibJS/Runtime/FunctionObject.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
AsyncGeneratorFunctionConstructor::AsyncGeneratorFunctionConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.AsyncGeneratorFunction.as_string(), *global_object.function_prototype())
{
}
void AsyncGeneratorFunctionConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 27.4.2.2 AsyncGeneratorFunction.prototype, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-prototype
define_direct_property(vm.names.prototype, global_object.async_generator_function_prototype(), 0);
// 27.4.2.1 AsyncGeneratorFunction.length, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-length
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
// 27.4.2.2 AsyncGeneratorFunction.prototype, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-prototype
define_direct_property(vm.names.prototype, global_object.async_generator_function_prototype(), 0);
}
// 27.4.1.1 AsyncGeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
ThrowCompletionOr<Value> AsyncGeneratorFunctionConstructor::call()
{
return TRY(construct(*this));
}
// 27.4.1.1 AsyncGeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
ThrowCompletionOr<Object*> AsyncGeneratorFunctionConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto function = TRY(FunctionConstructor::create_dynamic_function_node(global_object(), new_target, FunctionKind::AsyncGenerator));
OwnPtr<Interpreter> local_interpreter;
Interpreter* interpreter = vm.interpreter_if_exists();
if (!interpreter) {
local_interpreter = Interpreter::create_with_existing_realm(*realm());
interpreter = local_interpreter.ptr();
}
VM::InterpreterExecutionScope scope(*interpreter);
auto result = function->execute(*interpreter, global_object());
if (auto* exception = vm.exception())
return throw_completion(exception->value());
VERIFY(result.is_object() && is<ECMAScriptFunctionObject>(result.as_object()));
return &result.as_object();
}
}