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LibJS: Implement generator functions (only in bytecode mode)

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This commit is contained in:
Ali Mohammad Pur 2021-06-11 01:38:30 +04:30 • committed by Andreas Kling
parent c53a86a3fe
commit 3234697eca
21 changed files with 407 additions and 34 deletions
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22
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@ -218,8 +218,7 @@ void Call::execute(Bytecode::Interpreter& interpreter) const
void NewFunction::execute(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& global_object = interpreter.global_object();
interpreter.accumulator() = ScriptFunction::create(global_object, m_function_node.name(), m_function_node.body(), m_function_node.parameters(), m_function_node.function_length(), vm.current_scope(), m_function_node.is_strict_mode());
interpreter.accumulator() = ScriptFunction::create(interpreter.global_object(), m_function_node.name(), m_function_node.body(), m_function_node.parameters(), m_function_node.function_length(), vm.current_scope(), m_function_node.is_generator(), m_function_node.is_strict_mode());
}
void Return::execute(Bytecode::Interpreter& interpreter) const
@ -280,6 +279,18 @@ void PushLexicalEnvironment::execute(Bytecode::Interpreter& interpreter) const
interpreter.vm().call_frame().scope = block_lexical_environment;
}
void Yield::execute(Bytecode::Interpreter& interpreter) const
{
auto yielded_value = interpreter.accumulator().value_or(js_undefined());
auto object = JS::Object::create_empty(interpreter.global_object());
object->put("result", yielded_value);
if (m_continuation_label.has_value())
object->put("continuation", Value(static_cast<double>(reinterpret_cast<u64>(&m_continuation_label->block()))));
else
object->put("continuation", Value(0));
interpreter.do_return(object);
}
String Load::to_string(Bytecode::Executable const&) const
{
return String::formatted("Load {}", m_src);
@ -445,4 +456,11 @@ String PushLexicalEnvironment::to_string(const Bytecode::Executable& executable)
return builder.to_string();
}
String Yield::to_string(Bytecode::Executable const&) const
{
if (m_continuation_label.has_value())
return String::formatted("Yield continuation:@{}", m_continuation_label->block().name());
return String::formatted("Yield return");
}
}