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Description
If a type has a flexible array member, any other types which use the type with a flexible array member in their own type does not have the generic for the flexible array member propagated.
For example, scan_params has an FAM (with a regex pass to wrap the FAM in a ManuallyDrop (see #2936):
https://github.com/i509VCB/nrf70/blob/issue/fam-bindgen/fw/bindings.rs#L3209-L3236
#[repr(C, packed)]
pub struct scan_params<FAM: ?Sized = [::core::ffi::c_uint; 0]> {
#[doc = " If 0x1, RPU force passive scan on all channels"]
pub passive_scan: ::core::ffi::c_ushort,
#[doc = " Number of ssid's in scan_ssids parameter"]
pub num_scan_ssids: ::core::ffi::c_uchar,
#[doc = " Specific SSID's to scan for"]
pub scan_ssids: [ssid; 2usize],
#[doc = " used to send probe requests at non CCK rate in 2GHz band"]
pub no_cck: ::core::ffi::c_uchar,
#[doc = " Bitmap of bands to be scanned. Value Zero will scan both 2.4 and 5 GHZ"]
pub bands: ::core::ffi::c_uchar,
#[doc = " Information element(s) data ie"]
pub ie: ie,
#[doc = " MAC address"]
pub mac_addr: [::core::ffi::c_uchar; 6usize],
#[doc = " Max scan duration in active scan. If zero rpu programs 50msec"]
pub dwell_time_active: ::core::ffi::c_ushort,
#[doc = " Max scan duration in passive scan. If zero rpu programs 150msec"]
pub dwell_time_passive: ::core::ffi::c_ushort,
#[doc = " Number of channels to be scanned"]
pub num_scan_channels: ::core::ffi::c_ushort,
#[doc = " If true, skip local and IANA Unicast reserved MACs"]
pub skip_local_admin_macs: ::core::ffi::c_uchar,
#[doc = " specific channels to be scanned"]
pub center_frequency: ::core::mem::ManuallyDrop<FAM>,
}But then scan_params when used in umac_scan_info, the FAM type is not expanded:
https://github.com/i509VCB/nrf70/blob/issue/fam-bindgen/fw/bindings.rs#L3489-L3495
#[repr(C, packed)]
pub struct umac_scan_info {
#[doc = " scan type see &enum scan_reason"]
pub scan_reason: ::core::ffi::c_int,
#[doc = " scan parameters scan_params"]
pub scan_params: scan_params,
}Since the FAM type is not propagated to umac_scan_info, it is not possible to use the FAM parameter
Bindgen invocation:
https://github.com/i509VCB/nrf70/blob/issue/fam-bindgen/gen.py#L111-L124