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/*
* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/Optional.h>
#include <LibJS/Bytecode/Interpreter.h>
#include <LibJS/Lexer.h>
#include <LibJS/Parser.h>
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/FunctionConstructor.h>
#include <LibJS/Runtime/GeneratorFunctionConstructor.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
GeneratorFunctionConstructor::GeneratorFunctionConstructor(GlobalObject& global_object)
: NativeFunction(*static_cast<Object*>(global_object.function_constructor()))
{
}
void GeneratorFunctionConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 27.3.2.1 GeneratorFunction.length, https://tc39.es/ecma262/#sec-generatorfunction.length
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
// 27.3.2.2 GeneratorFunction.prototype, https://tc39.es/ecma262/#sec-generatorfunction.length
define_direct_property(vm.names.prototype, global_object.generator_function_prototype(), 0);
}
GeneratorFunctionConstructor::~GeneratorFunctionConstructor()
{
}
// 27.3.1.1 GeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-generatorfunction
ThrowCompletionOr<Value> GeneratorFunctionConstructor::call()
{
return TRY(construct(*this));
}
// 27.3.1.1 GeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-generatorfunction
ThrowCompletionOr<Object*> GeneratorFunctionConstructor::construct(FunctionObject& new_target)
{
auto function = FunctionConstructor::create_dynamic_function_node(global_object(), new_target, FunctionKind::Generator);
if (auto* exception = vm().exception())
return throw_completion(exception->value());
auto* bytecode_interpreter = Bytecode::Interpreter::current();
VERIFY(bytecode_interpreter);
auto executable = Bytecode::Generator::generate(function->body(), true);
auto& passes = JS::Bytecode::Interpreter::optimization_pipeline();
passes.perform(executable);
if constexpr (JS_BYTECODE_DEBUG) {
dbgln("Optimisation passes took {}us", passes.elapsed());
dbgln("Compiled Bytecode::Block for function '{}':", function->name());
for (auto& block : executable.basic_blocks)
block.dump(executable);
}
return ECMAScriptFunctionObject::create(global_object(), function->name(), function->body(), function->parameters(), function->function_length(), vm().lexical_environment(), nullptr, FunctionKind::Generator, function->is_strict_mode(), function->might_need_arguments_object());
}
}
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