Unable to use bool field as if condition

[elias098]

currently the below gives the error

proc-macro panicked: not yet implemented: Expr::Field { attrs: [], base: Expr::Path { attrs: [], qself: None, path: Path { leading_colon: None, segments: [PathSegment { ident: Ident { ident: "a", span: SpanData { range: 1694..1695, anchor: SpanAnchor(FileId(0), 110), ctx: SyntaxContextId(0) } }, arguments: PathArguments::None }] } }, dot_token: Dot, member: Member::Named(Ident { ident: "b", span: SpanData { range: 1696..1697, anchor: SpanAnchor(FileId(0), 110), ctx: SyntaxContextId(0) } }) } cond not supported

#[derive(Debug, CubeType, Clone)]
struct A {
    b: bool,
}

#[cube]
fn test_field(a: A) {
    if a.b {}
}