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3b0bf05fa5
This applies a simple transformation, and adds a simple wrapper that translates the generator interface to the async function interface.
66 lines
2.6 KiB
C++
66 lines
2.6 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <AK/Optional.h>
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#include <LibJS/Bytecode/Interpreter.h>
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#include <LibJS/Lexer.h>
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#include <LibJS/Parser.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/FunctionConstructor.h>
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#include <LibJS/Runtime/GeneratorFunctionConstructor.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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GeneratorFunctionConstructor::GeneratorFunctionConstructor(GlobalObject& global_object)
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: NativeFunction(*static_cast<Object*>(global_object.function_constructor()))
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{
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}
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void GeneratorFunctionConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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// 27.3.2.1 GeneratorFunction.length, https://tc39.es/ecma262/#sec-generatorfunction.length
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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// 27.3.2.2 GeneratorFunction.prototype, https://tc39.es/ecma262/#sec-generatorfunction.length
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define_direct_property(vm.names.prototype, global_object.generator_function_prototype(), 0);
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}
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GeneratorFunctionConstructor::~GeneratorFunctionConstructor()
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{
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}
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// 27.3.1.1 GeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-generatorfunction
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ThrowCompletionOr<Value> GeneratorFunctionConstructor::call()
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{
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return TRY(construct(*this));
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}
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// 27.3.1.1 GeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-generatorfunction
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ThrowCompletionOr<Object*> GeneratorFunctionConstructor::construct(FunctionObject& new_target)
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{
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auto function = TRY(FunctionConstructor::create_dynamic_function_node(global_object(), new_target, FunctionKind::Generator));
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auto* bytecode_interpreter = Bytecode::Interpreter::current();
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VERIFY(bytecode_interpreter);
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auto executable = Bytecode::Generator::generate(function->body(), FunctionKind::Generator);
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auto& passes = JS::Bytecode::Interpreter::optimization_pipeline();
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passes.perform(executable);
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if constexpr (JS_BYTECODE_DEBUG) {
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dbgln("Optimisation passes took {}us", passes.elapsed());
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dbgln("Compiled Bytecode::Block for function '{}':", function->name());
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for (auto& block : executable.basic_blocks)
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block.dump(executable);
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}
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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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}
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}
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