The new JavaScript technology in question is called type inference.

This guides the process of type inference in situations where otherwise there would be ambiguity.

It enjoys a strong static type system with type inference.

Scala's type inference will work out that this is a .

Rust features type inference, for variables declared with the keyword.

The core language is functional and has a static type system with type inference.

The opposite operation of type inference is called type erasure.

This allows Shed Skin to do type inference on larger programs than previously.

Wells' result implies that type inference for System F is impossible.

In a hypothetical language supporting type inference, the code might be written like this instead:

Unification is used during type inference, for instance in the functional programming language Haskell.

Haskell's type inference system helps ensure that callers deal with possible errors.

Languages using type inference attempt to discover the types automatically from the function's body and usage.

These type systems do not have decidable type inference and are difficult to understand and program with.

Haskell manages to achieve type inference without predicativity, but with a few complications.

Type inference algorithms are typically based on unification.

This version added many small language changes including strings in switch, try-with-resources and type inference for generic instance creation.

Like for prolog an algorithm for type inference can be given:

Type inference in System F is undecidable however.

This is because predicativity, together with other restrictions, makes the type system simple enough that type inference is possible.

Haskell has a strong, static type system based on Hindley-Milner type inference.

When using type inference, the compiler will also add attributes such as and to a function's type, if it can prove that they apply.

Type inference refers to the automatic deduction of the type of an expression in a programming language.

Type inference is the ability to automatically deduce, either partially or fully, the type of an expression at compile time.

However, type inference is undecidable.