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Abstract type: In programming languages, an abstract type is a type in a nominative type system which cannot be instantiated directly. Abstract types are also known as existential types. An abstract type may provide no implementation, or an incomplete implementation. Often, abstract types will have one or more implementations provided separately, for example, in the form of concrete subclasses which can be instantiated. It may include abstract methods or abstract properties that are shared by its subtypes.
Printed dictionaries and other books with definitions for Abstract type
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International Standard ISO/IEC 8652/2012 (E) by S. Tucker Taft, Robert A. Duff, Randall L. Brukardt, Erhard Ploedereder, Pascal Leroy, Edmond Schonberg
An abstract type is a tagged type intended for use as an ancestor of other types, but which is not allowed to have objects of its own. An abstract subprogram is a subprogram that has no body, but is intended to be overridden at some point when ...
Ada for Software Engineers (2009)
by Mordechai Ben-Ari
abstract type is a tagged type intended for use as an ancestor of other type, but which is not allowed to have objects of its own. An abstract subprogram is a subprogram that has no body, but is intended to be overridden at some point when ...
Programming in Ada 2012 (2014)
by John Barnes
Abstract type An abstract type is a tagged type intended for use as an ancestor of other types, but which is not allowed to have objects of its own. Access type An access type has values that designate aliased objects. Access types correspond ...
by Khosrow-Pour, Mehdi
By applying IT1_abstract_type rule we obtain the abstract type field.
Dictionary of E-Business (2003)
A Definitive Guide to Technology and Business Terms by Francis Botto
abstract type A definition in a property list that gives characteristics of documents. Accelerator 1. A graphics card offering high-speed operation and optimised for GUIs like X-Windows, Windows and OS/ 2.
by Dieter Wunderlich
Implicit in the distinction of these types is the claim that they can neither be reduced to each other nor regarded as subtypes of a more comprehensive or abstract type. Only the positional type could in some sense be related to the accusative ...
For Information and Communication Technologies and Related Areas by J. Vlietstra
AT&T Wireless Services ATU Analog Trunk Unit ATU Analysis and Transformation Unit ATV Account Transfer Voucher ATW Accumulator Track Write a-type abstract type AU Access | Adder Unit AU Adaptive|Administrative Unit AU Additional ...
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