macro_rules! feature_error {
    ($Strcs: ident, $Strc: ident, $ctx: expr, $loc: expr, $name: expr) => { ... };
    ($Strc: ident, $ctx: expr, $loc: expr, $name: expr) => { ... };
}
Expand description

feature_error!($Strc: struct, ctx: Context, loc: Location, name: &str)