Macro helix_runtime::declare_types

macro_rules! declare_types {
    { $(#[$attr:meta])* pub class $cls:ident { $($body:tt)* } $($rest:tt)* } => { ... };
    { $(#[$attr:meta])* class $cls:ident { $($body:tt)* } $($rest:tt)* } => { ... };
    { $(#[$attr:meta])* pub reopen class $cls:ident { $($body:tt)* } $($rest:tt)* } => { ... };
    { $(#[$attr:meta])* reopen class $cls:ident { $($body:tt)* } $($rest:tt)* } => { ... };
    { } => { ... };
}