Cannot bind to MemberExpression

[hanielu]

Describe the bug

When trying to bind: to a MemberExpression (e.g bind:checked={checked(true).current}) Svelte throws the error:

Can only bind to an Identifier or MemberExpression

Here's a simple snippet highlighting the issue:

<script>
  const state = $state({
    checked: true,
  });

  const store = Object.fromEntries(
    Object.keys(state).map(key => [
      key,
      (current = false) => {
        return current
          ? {
              get current() {
                return state[key];
              },
              set current(value) {
                state[key] = value;
              },
            }
          : state[key];
      },
    ])
  );
</script>

<!-- This causes the error ❌ -->
<input type="checkbox" bind:checked={store.checked(true).current} />

Reproduction

Here's a REPL

Logs

No response

System Info

Playground version 5.2.2

Severity

annoyance

[trueadm]

You cannot bind to a call expression, which store.checked(true).current contains. This has always been a constraint of bind and if #14307 lands then you'll be able to work around this constraint :)