//! The available formats to convert
use super::*;
use std::io;
use object::{
    Object, OwnedObject,
};

pub struct Config;

/// A directive for a format on how to encode and decode objects.
#[derive(Clone, Copy)]
pub struct FormatDirective
{
    encode: fn (&Config, &mut dyn io::Write, &dyn Object) -> io::Result<usize>,
    decode: fn (&Config, &mut dyn io::Read) -> io::Result<(OwnedObject<'static>, usize)>,
}

macro_rules! directive {
    ($($name:literal),+ => $encode:expr, $decode:expr) => {
	(&[$($name),+], FormatDirective {
	    encode: $encode,
	    decode: $decode,
	})
    };
}

/// All format directives and their name(s)
pub static FORMATS: &[(&'static [&'static str], FormatDirective)] = &[
    directive!("json" => |_, _, _| todo!(), |_, _| todo!()),
    directive!("s-expression", "sexpr" => |_, _, _| todo!(), |_, _| todo!()),
    directive!("cbor" => |_, _, _| todo!(), |_, _| todo!()),
];