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A foreign function interface (FFI) is a mechanism by which a program written in one programming language can call routines or make use of services written or compiled in another one. An FFI is often used in contexts where calls are made into a binary dynamic-link library.
The marker interface pattern is a design pattern in computer science, used with languages that provide run-time type information about objects.It provides a means to associate metadata with a class where the language does not have explicit support for such metadata.
The Go standard library uses interfaces to provide genericity in several places, including the input/output system that is based on the concepts of Reader and Writer. [74]: 282–283 Besides calling methods via interfaces, Go allows converting interface values to other types with a run-time type check.
awk – used for text file manipulation. sed – parses and transforms text SQL – has only a few keywords and not all the constructs needed for a full programming language [ a ] – many database management systems extend SQL with additional constructs as a stored procedure language
The C++ examples in this section demonstrate the principle of using composition and interfaces to achieve code reuse and polymorphism. Due to the C++ language not having a dedicated keyword to declare interfaces, the following C++ example uses inheritance from a pure abstract base class.
Interface injection, where the dependency's interface provides an injector method that will inject the dependency into any client passed to it. In some frameworks, clients do not need to actively accept dependency injection at all. In Java, for example, reflection can make private attributes public when testing and inject services directly. [30]
The Dynamic Invocation Interface (DII) is an API which allows dynamic construction of CORBA object invocations. It is used at compile time when a client does not have knowledge about the object it wants to invoke. With this interface an argument list is marshalled, a function is named, and a request for service is sent to the object server.
In object-oriented programming, an interface or protocol type [a] is a data type that acts as an abstraction of a class. It describes a set of method signatures , the implementations of which may be provided by multiple classes that are otherwise not necessarily related to each other. [ 1 ]