Data types

Data types are types that contain one or more named elements. They are defined in the global scope using the data special form.

data Person {
    name:String
    age:i32
};

Data types can also be declared, without specifying their elements. These data types are considered undefined types.

data MyNode;

Furthermore, any type which contains an element of an undefined type is also an undefined type. Pointers and array pointers are always considered defined types.

You can get an element of a data type using the [] special form. They can be indexed either by name or by a compile-time known numeric index.

fnc print (p:Person) () {
    std.println "Name: " ([] p name);
    std.println "Age: " ([] p age);

    #$
    This would also work:
    std.println "Name: " ([] p 0);
    std.println "Age: " ([] p 1);
    $#
};

Data types can be constructed using the make macro from base.orb.

    sym (p (make Person (name "Peter") (age 20)));