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LibJS: Add using declaration support, RAII like operation in js

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In this patch only top level and not the more complicated for loop using
statements are supported. Also, as noted in the latest meeting of tc39
async parts of the spec are not stage 3 thus not included.
This commit is contained in:
davidot 2022-12-20 22:09:57 +01:00 • committed by Linus Groh
parent 2c87ff2218
commit 541637e15a
15 changed files with 861 additions and 68 deletions
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13
Userland/Libraries/LibJS/SourceTextModule.cpp
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@ -687,13 +687,20 @@ ThrowCompletionOr<void> SourceTextModule::execute_module(VM& vm, GCPtr<PromiseCa
// c. Let result be the result of evaluating module.[[ECMAScriptCode]].
auto result = m_ecmascript_code->execute(vm.interpreter());
// d. Suspend moduleContext and remove it from the execution context stack.
// d. Let env be moduleContext's LexicalEnvironment.
auto* env = module_context.lexical_environment;
VERIFY(is<DeclarativeEnvironment>(*env));
// e. Set result to DisposeResources(env, result).
result = dispose_resources(vm, static_cast<DeclarativeEnvironment*>(env), result);
// f. Suspend moduleContext and remove it from the execution context stack.
vm.pop_execution_context();
// e. Resume the context that is now on the top of the execution context stack as the running execution context.
// g. Resume the context that is now on the top of the execution context stack as the running execution context.
// FIXME: We don't have resume yet.
// f. If result is an abrupt completion, then
// h. If result is an abrupt completion, then
if (result.is_error()) {
// i. Return ? result.
return result;