Macro rcodec::struct_codec

macro_rules! struct_codec {
    { $stype:ident from $($hcodec:tt)+ } => { ... };
}

Shorthand for creating a Codec for a struct.

The given struct must support HList conversions, either by using the HListSupport attribute or by manually implementing the FromHList and ToHList traits.

Examples

use pl_hlist::*;
use rcodec::{byte_vector, struct_codec};
use rcodec::codec::*;

#[derive(Debug, PartialEq, Eq, HListSupport)]
pub struct Header {
    foo: u8,
    bar: u32
}

let magic = byte_vector!(0xCA, 0xFE);
let header_codec = struct_codec!(
    Header from
    { "magic" => constant(&magic) } >>
    { "foo"   => uint8            } ::
    { "junk"  => ignore(2)        } >>
    { "bar"   => uint32           }
);

let bytes = byte_vector!(0xCA, 0xFE, 0x07, 0xBE, 0xEF, 0x00, 0x00, 0x00, 0x06);
let header = header_codec.decode(&bytes).unwrap().value;
assert_eq!(header, Header { foo: 7, bar: 6 });