Macro proc_easy::easy_argument

macro_rules! easy_argument {
    (
        $(#[$meta:meta])*
        $vis:vis struct $name:ident {
            $(#[$nmeta:meta])* $nvis:vis $nname:ident: $ntype:ty
            $(, $(#[$fmeta:meta])* $fvis:vis $fname:ident: $ftype:ty)*
            $(,)?
        }
    ) => { ... };
    (
        $(#[$meta:meta])*
        $vis:vis struct $name:ident (
            $(#[$nmeta:meta])* $nvis:vis $ntype:ty
            $(, $(#[$fmeta:meta])* $fvis:vis $ftype:ty)*
            $(,)?
        );
    ) => { ... };
}

Defines argument structure. First field is a argument name. It must be EasyToken implementation that will be used to for EasyPeek implementation. And following fields are parsed in order. In case of errors, argument name and span will be used.