fn parse_dialect<S: Stage>(
cx: &mut AcceptContext<'_, '_, S>,
dialect: Option<(Symbol, Span)>,
failed: &mut bool,
) -> Option<(MirDialect, Span)>fn parse_dialect<S: Stage>(
cx: &mut AcceptContext<'_, '_, S>,
dialect: Option<(Symbol, Span)>,
failed: &mut bool,
) -> Option<(MirDialect, Span)>