// A type alias defines a new name for an existing type.
// Type aliases are declared with the keyword type.
// Every value has a single, specific type, but may
// implement several different traits, or be compatible
// with several different type constraints.
type Point = (u8, u8);
let p: Point = (41, 68);
// A type alias to a tuple-struct or unit-struct cannot
// be used to qualify that type's constructor:
struct MyStruct(u32);
use MyStruct as UseAlias;
type TypeAlias = MyStruct;
let _ = UseAlias(5); // OK
let _ = TypeAlias(5); // Doesn't work