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LibJS: Return Optional<T> from Completion::{value,target}(), not T

In the end this is a nicer API than having separate has_{value,target}()
and having to check those first, and then making another Optional from
the unwrapped value:

    completion.has_value() ? completion.value() : Optional<Value> {}
    //                       ^^^^^^^^^^^^^^^^^^
    //         Implicit creation of non-empty Optional<Value>

This way we need to unwrap the optional ourselves, but can easily pass
it to something else as well.

This is in anticipation of the AST using completions :^)
This commit is contained in:
Linus Groh 2021-12-28 17:42:14 +01:00
parent b39aede8fe
commit 85f0fc2b83
15 changed files with 55 additions and 57 deletions

View file

@ -116,7 +116,7 @@ Promise::ResolvingFunctions Promise::create_resolving_functions()
dbgln_if(PROMISE_DEBUG, "[Promise @ {} / PromiseResolvingFunction]: Exception while getting 'then' property, rejecting with error", &promise);
vm.clear_exception();
vm.stop_unwind();
return promise.reject(then.throw_completion().value());
return promise.reject(*then.throw_completion().value());
}
// 11. Let thenAction be then.[[Value]].