Selections are a list of fields and can be defined on a struct. A Toql query can then select the selection instead of all the individual fields. See here.

# #![allow(unused_variables)]
#fn main() {
#[derive(Toql)]
#[toql(selection(name="std", fields="*, address_street"))]
#[toql(selection(name="tiny", fields="id, name"))]
struct User {

 #[toql(key)]
 id: u64

 name: String

 #[toql(join())]
 address: Address

}

[derive(Toql)]
struct Address {

 #[toql(key)]
 id: u64

 street: String
#}

Notice that selection names with 3 letters or less are internally reserved and my have special meanings. They can't be defined except std and cnt.

The selections above can now be used in a query. Instead of writing name, address_street it is possible to write $std or event just $. (Because the standart selection is so common, $ aliases to $std).

The cnt selection is defined in a similar way.TODO