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t. e. In programming language theory and type theory, polymorphism is the use of a single symbol to represent multiple different types. [ 1] In object-oriented programming, polymorphism is the provision of a single interface to entities of different types. [ 2] The concept is borrowed from a principle in biology where an organism or species can ...
Polymorphism. In programming languages and type theory, parametric polymorphism allows a single piece of code to be given a "generic" type, using variables in place of actual types, and then instantiated with particular types as needed. [ 1]: 340 Parametrically polymorphic functions and data types are sometimes called generic functions and ...
Hindley–Milner type system. A Hindley–Milner ( HM) type system is a classical type system for the lambda calculus with parametric polymorphism. It is also known as Damas–Milner or Damas–Hindley–Milner. It was first described by J. Roger Hindley [ 1] and later rediscovered by Robin Milner. [ 2]
Ad hoc polymorphism is a dispatch mechanism: control moving through one named function is dispatched to various other functions without having to specify the exact function being called. Overloading allows multiple functions taking different types to be defined with the same name; the compiler or interpreter automatically ensures that the right ...
In computer programming, operator overloading, sometimes termed operator ad hoc polymorphism, is a specific case of polymorphism, where different operators have different implementations depending on their arguments. Operator overloading is generally defined by a programming language, a programmer, or both.
Row polymorphism. In programming language type theory, row polymorphism is a kind of polymorphism that allows one to write programs that are polymorphic on row types such as record types and polymorphic variants. [ 1] A row-polymorphic type system and proof of type inference was introduced by Mitchell Wand. [ 2][ 3]
Polymorphic recursion. In computer science, polymorphic recursion (also referred to as Milner – Mycroft typability or the Milner–Mycroft calculus) refers to a recursive parametrically polymorphic function where the type parameter changes with each recursive invocation made, instead of staying constant. Type inference for polymorphic ...
Type class. In computer science, a type class is a type system construct that supports ad hoc polymorphism. This is achieved by adding constraints to type variables in parametrically polymorphic types. Such a constraint typically involves a type class T and a type variable a, and means that a can only be instantiated to a type whose members ...