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LibJS: Implement async functions as generator functions in BC mode

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This applies a simple transformation, and adds a simple wrapper that
translates the generator interface to the async function interface.
This commit is contained in:
Ali Mohammad Pur 2021-11-11 00:46:07 +03:30 • committed by Linus Groh
parent c604e95993
commit 3b0bf05fa5
14 changed files with 192 additions and 43 deletions
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8
Userland/Libraries/LibJS/Bytecode/Generator.cpp
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@ -23,19 +23,19 @@ Generator::~Generator()
{
}
Executable Generator::generate(ASTNode const& node, bool is_in_generator_function)
Executable Generator::generate(ASTNode const& node, FunctionKind enclosing_function_kind)
{
Generator generator;
generator.switch_to_basic_block(generator.make_block());
if (is_in_generator_function) {
generator.enter_generator_context();
generator.m_enclosing_function_kind = enclosing_function_kind;
if (generator.is_in_generator_or_async_function()) {
// Immediately yield with no value.
auto& start_block = generator.make_block();
generator.emit<Bytecode::Op::Yield>(Label { start_block });
generator.switch_to_basic_block(start_block);
}
node.generate_bytecode(generator);
if (is_in_generator_function) {
if (generator.is_in_generator_or_async_function()) {
// Terminate all unterminated blocks with yield return
for (auto& block : generator.m_root_basic_blocks) {
if (block.is_terminated())