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LibJS: Convert initialize_binding() to ThrowCompletionOr

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Also add spec step comments to it while we're here.
This commit is contained in:
Linus Groh 2021-10-09 19:16:24 +01:00
parent 2691c65639
commit ae397541fb
12 changed files with 50 additions and 36 deletions
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15
Userland/Libraries/LibJS/Runtime/DeclarativeEnvironment.cpp
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@ -86,14 +86,23 @@ ThrowCompletionOr<void> DeclarativeEnvironment::create_immutable_binding(GlobalO
}
// 9.1.1.1.4 InitializeBinding ( N, V ), https://tc39.es/ecma262/#sec-declarative-environment-records-initializebinding-n-v
void DeclarativeEnvironment::initialize_binding(GlobalObject&, FlyString const& name, Value value)
ThrowCompletionOr<void> DeclarativeEnvironment::initialize_binding(GlobalObject&, FlyString const& name, Value value)
{
auto it = m_names.find(name);
VERIFY(it != m_names.end());
auto& binding = m_bindings[it->value];
// 1. Assert: envRec must have an uninitialized binding for N.
VERIFY(binding.initialized == false);
// 2. Set the bound value for N in envRec to V.
binding.value = value;
// 3. Record that the binding for N in envRec has been initialized.
binding.initialized = true;
// 4. Return NormalCompletion(empty).
return {};
}
// 9.1.1.1.5 SetMutableBinding ( N, V, S ), https://tc39.es/ecma262/#sec-declarative-environment-records-setmutablebinding-n-v-s
@ -106,7 +115,7 @@ void DeclarativeEnvironment::set_mutable_binding(GlobalObject& global_object, Fl
return;
}
(void)create_mutable_binding(global_object, name, true);
initialize_binding(global_object, name, value);
(void)initialize_binding(global_object, name, value);
return;
}
@ -171,7 +180,7 @@ void DeclarativeEnvironment::initialize_or_set_mutable_binding(Badge<ScopeNode>,
VERIFY(it != m_names.end());
auto& binding = m_bindings[it->value];
if (!binding.initialized)
initialize_binding(global_object, name, value);
MUST(initialize_binding(global_object, name, value));
else
set_mutable_binding(global_object, name, value, false);
}