Re: [PATCH v9 0/6] MR8890: windows.devices.enumeration: Add support for parsing AQS filter strings.

[Rémi Bernon (＠rbernon)]

Looking a bit deeper into the details I'm thinking you should probably generate the DEVPROP_FILTER_EXPRESSION directly while parsing, instead of using a separate IR.

You could have:

```
struct aqs_expr
{
    DEVPROP_FILTER_EXPRESSION *filters;
    UINT filters_len;
};
```

And get rid of pretty much all the accessory stuff. `get_boolean_expr` would allocate a 1 filter expression, `get_compare_expr` would reallocate lhs filters to grow and append rhs, with the open/close ops around.