Typeless

Typeless is an adjective used to describe systems, languages, or data models that do not enforce or rely on fixed type information. In computing, typelessness denotes a design where values are not bound to a single type or where type information is intentionally minimized or bypassed.

In programming language theory, typelessness sits on a spectrum between untyped and typed approaches. Fully untyped languages are rare; many languages are dynamically typed, performing type checks at runtime, while statically typed languages enforce type rules at compile time. The term typeless is sometimes used to describe languages or environments that avoid explicit type declarations, instead carrying values in representations that can hold multiple kinds. In practice, most languages are not truly typeless; they implement some form of type system or rely on type inference, and they may still incur dynamic typing or type erasure under the hood.

In data interchange and storage, typeless ideas appear in systems that use polymorphic or generic containers and type erasure, where the exact type of a value is not known until runtime or is hidden from the compiler. Dynamic languages exemplify this behavior, as do certain database schemas or serialization formats that support generic values. Typelessness can increase flexibility and interoperability but may compromise compile-time safety, tooling support, and optimization opportunities.

Overall, typelessness highlights a design choice: prioritizing flexibility and simplicity over strict type guarantees. See also type system, typing, dynamic typing, untyped lambda calculus, and type safety.