Re: [Boost-users] [spirit] Qi rule for GPS NMEA

Subject: Re: [Boost-users] [spirit] Qi rule for GPS NMEA
From: Michael Powell (mwpowellhtx_at_[hidden])
Date: 2013-09-05 21:42:19

Oh yeah, and then I am adapting it into a struct:

BOOST_FUSION_ADAPT_STRUCT(
    dchem::drivers::nmea::basic_nmea_message_t,
    (std::string, m_message)
    (int, m_checksum)
)

Or at least I'd like to. I've got the general framework understood
from the employee-examples.

Thanks again.

On Thu, Sep 5, 2013 at 8:39 PM, Michael Powell <mwpowellhtx_at_[hidden]> wrote:
> Hello,
>
> I'm digging into a qi rule for GPS NMEA and want to approach it as a
> kind of 2-pass parser. First pass to extract the message and
> hex-formatted checksum. Next pass to parse out the actual messages
> from the message.
>
> I believe I comprehend how to go about the second pass. For the first
> pass, I want to parse $XYZ*HH\r\n.
>
> That's the literal '$', and everything between there and the literal
> '*', followed by the two hex characters, as a complete field, followed
> by the terminal CR+LF.
>
> How do I express the "all characters excluding '*'" for the NMEA
> message? Then the hex field?
>
> Thanks...
>
> Regards,
>
> Michael Powell