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LibJS: Implement Module linking and evaluating

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davidot 2022-01-18 19:29:17 +01:00 • committed by Linus Groh
parent be9d478d92
commit 1b8ccf9a66
9 changed files with 1569 additions and 22 deletions
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1
Userland/Libraries/LibJS/Runtime/ErrorTypes.h
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@ -50,6 +50,7 @@
M(InvalidIndex, "Index must be a positive integer") \
M(InvalidLeftHandAssignment, "Invalid left-hand side in assignment") \
M(InvalidLength, "Invalid {} length") \
M(InvalidOrAmbiguousExportEntry, "Invalid or ambiguous export entry '{}'") \
M(InvalidPrecision, "Precision must be an integer no less than 1, and no greater than 100") \
M(InvalidTimeValue, "Invalid time value") \
M(InvalidRadix, "Radix must be an integer no less than 2, and no greater than 36") \

28
Userland/Libraries/LibJS/Runtime/ModuleNamespaceObject.cpp
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@ -150,8 +150,32 @@ ThrowCompletionOr<Value> ModuleNamespaceObject::internal_get(PropertyKey const&
// 4. Let m be O.[[Module]].
// 5. Let binding be ! m.ResolveExport(P).
// FIXME: Add steps 5 through 12
return vm().throw_completion<ReferenceError>(global_object(), ErrorType::ModuleNoEnvironment);
auto binding = MUST(m_module->resolve_export(vm(), property_key.to_string()));
// 6. Assert: binding is a ResolvedBinding Record.
VERIFY(binding.is_valid());
// 7. Let targetModule be binding.[[Module]].
auto* target_module = binding.module;
// 8. Assert: targetModule is not undefined.
VERIFY(target_module);
// 9. If binding.[[BindingName]] is namespace, then
if (binding.is_namespace()) {
// a. Return ? GetModuleNamespace(targetModule).
return TRY(target_module->get_module_namespace(vm()));
}
// 10. Let targetEnv be targetModule.[[Environment]].
auto* target_environment = target_module->environment();
// 11. If targetEnv is empty, throw a ReferenceError exception.
if (!target_environment)
return vm().throw_completion<ReferenceError>(global_object(), ErrorType::ModuleNoEnvironment);
// 12. Return ? targetEnv.GetBindingValue(binding.[[BindingName]], true).
return target_environment->get_binding_value(global_object(), binding.export_name, true);
}
// 10.4.6.9 [[Set]] ( P, V, Receiver ), https://tc39.es/ecma262/#sec-module-namespace-exotic-objects-set-p-v-receiver