Gradual Typing
A type-system design that permits dynamic typing and static type checking to be mixed within the same codebase. Static checking is introduced module by module through type boundaries, lowering migration costs but carrying a risk of type loopholes.
Timeline (last 90 days)
Gradual typing is a type system design that allows dynamic typing and static type checking to be mixed within the same codebase.
The core mechanism of gradual typing is the "type boundary": developers can annotate types in key modules and obtain compile-time checking while retaining dynamic behavior in unannotated regions; the type checker interacts with dynamic code through top types such as `any` or `unknown`.
Gradual typing brings problems such as type holes (e.g., `any` escaping) and incomplete checking, which need to be constrained through engineering conventions.
Gradual typing is a formal concept in type theory, referring to allowing some code in the same language to carry type annotations while other code is fully untyped, with the type checker automatically inferring or inserting runtime checks at the boundary to ensure safety.
All Facts (4)
Gradual typing is a type system design that allows dynamic typing and static type checking to be mixed within the same codebase.
50%UnverifiedThe core mechanism of gradual typing is the "type boundary": developers can annotate types in key modules and obtain compile-time checking while retaining dynamic behavior in unannotated regions; the type checker interacts with dynamic code through top types such as `any` or `unknown`.
50%UnverifiedGradual typing brings problems such as type holes (e.g., `any` escaping) and incomplete checking, which need to be constrained through engineering conventions.
50%UnverifiedGradual typing is a formal concept in type theory, referring to allowing some code in the same language to carry type annotations while other code is fully untyped, with the type checker automatically inferring or inserting runtime checks at the boundary to ensure safety.
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