Add support for bit fields

[kennykerr]

Rust lacks support at the moment: rust-lang/rfcs#314

Metadata now provides this information: microsoft/win32metadata#1392

[mominshaikhdevs]

I don't see the point of this issue. Since, rust the language itself doesn't support that. I believe this can be reopened and worked on once the lang itself supports it.

[kennykerr]

We could add get/set methods.

[workingjubilee]

We do indeed effectively farm out this responsibility to crates, essentially so that those crates can implement the getters/setters that strike their fancy. I believe rust-bindgen provides some such support.

[kennykerr]

I had a look at the metadata but it doesn't appear to include the type of each bitfield. For example, FLICK_DATA is defined as follows:

typedef struct FLICK_DATA
{
    FLICKACTION_COMMANDCODE iFlickActionCommandCode:5;
    FLICKDIRECTION iFlickDirection:3;
    BOOL fControlModifier:1;
    BOOL fMenuModifier:1;
    BOOL fAltGRModifier:1;
    BOOL fWinModifier:1;
    BOOL fShiftModifier:1;
    INT  iReserved:2;
    BOOL fOnInkingSurface:1;
    INT  iActionArgument:16;
}FLICK_DATA;

But the metadata just contains the offsets:

public struct FLICK_DATA
{
    [NativeBitfield("iFlickActionCommandCode", 0L, 5L)]
    [NativeBitfield("iFlickDirection", 5L, 3L)]
    [NativeBitfield("fControlModifier", 8L, 1L)]
    [NativeBitfield("fMenuModifier", 9L, 1L)]
    [NativeBitfield("fAltGRModifier", 10L, 1L)]
    [NativeBitfield("fWinModifier", 11L, 1L)]
    [NativeBitfield("fShiftModifier", 12L, 1L)]
    [NativeBitfield("iReserved", 13L, 2L)]
    [NativeBitfield("fOnInkingSurface", 15L, 1L)]
    [NativeBitfield("iActionArgument", 16L, 16L)]
    public int _bitfield;
}

@riverar do you know if this is intentionally omitting the field types or am I missing something?

[riverar]

That is... not good. We'll need to fix that upstream.

[kennykerr]

Thanks, I'll close this for now then - nothing actionable to do here unfortunately.