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In generic programming, a concept is a description of supported operations on a type, including syntax and semantics. In this way, concepts are related to abstract types but concepts do not require a subtype relationship. Language use The term was in use as early as 1998 for STL, as this was one of the first libraries that extensively used templates. The term concept (and its popularization) is credited to Alexander Stepanov, the primary designer of the STL. In the C++ 1998 standard, the Concept term was introduced to name just a simple description of the requirements for particular type, usually being a template parameter. It was not encoded in the language explicitly – the concept was expressed only by what operations are attempted on objects of that type and what is expected to work (that is, to compile correctly). There was a proposal to add concepts as an explicit language feature in C++11, though it was rejected as "not ready". C++20 eventually accepted the refined design of concept. As generics in Java and C# have some similarities to C++'s templates, the role of concepts there is played by interfaces. However, there is one important difference between concepts and interfaces: when a template parameter is required to implement a particular interface, the matching type can only be a class that implements (explicitly) that interface. Concepts bring more flexibility because they can be satisfied in two ways: explicitly defined as satisfied by using a concept map (defined separately to the type itself, unlike interfaces) implicitly defined for "auto concepts", which can be used also for built in types and other types that were not predestined for this use

From Wikipedia (CC BY-SA 4.0).

Notable quotes

“There are three aspects of thinking as more or less complete stages of it. These are, conception, judgment, and reasoning. They are not to be considered three distinct acts; not even three successive stages. No one of them could occur without each of the others.”
— John Dewey, Psychology (1887) p. 204.
“Concepts have meaning only if we can point to objects to which they refer and to rules by which they are assigned to these objects.”
— Albert Einstein, "Ernst Mach," Physikalische Zeitschrift, 17 (1916) as quoted by Peter C. Aichelburg, Roman U. Sexl, Albert Einstein: His Influence on Physics, Philosophy and Politics (2012) p. 117.
“Concepts can only acquire content when they are connected, however indirectly, with sensible experience. But no logical investigation can reveal this connection; it can only be experienced. ...this connection ...determines the cognitive value of systems of concepts.”
— Albert Einstein, "The Problem of Space, Ether, and the Field in Physics," Mein Weltbild, Amsterdam: Querido Verlag (1934) in Ideas and Opinions (1954)
“All concepts, even those which are closest to experience, are from the point of view of logic freely chosen conventions.”
— Albert Einstein, "Autobiographical notes" in Albert Einstein: Philosopher-scientist, The Library of Living Philosophers (1949) p.13.
“Often it is only after immense intellectual effort, which may have continued over centuries, that humanity at last succeeds in achieving knowledge of a concept in its pure form, by stripping off the irrelevant accretions which veil it from the eye of the mind.”
— Gottlob Frege, Grundgesetze der Arithmetik (1893); Tr. J. L. Austin as The Foundations of Arithmetic (Oxford, 1950); as quoted by , Human Understanding: The Collective Use and Evolution of Concepts (1972) Vol. 1, p. 56.
“Kant says that concept without percepts are empty, percepts without concepts are blind; it would perhaps be truer to say that concepts and percepts are inseparable; and if torn asunder, they are nothing.”
— Max Müller, "On the Orgin of Reason," The Popular Science Monthly (1878) p. 548.

Quotes via Wikiquote (CC BY-SA), each with its original source.

Notable quotes

“There are three aspects of thinking as more or less complete stages of it. These are, conception, judgment, and reasoning. They are not to be considered three distinct acts; not even three successive stages. No one of them could occur without each of the others.”
— John Dewey, Psychology (1887) p. 204.
“Concepts have meaning only if we can point to objects to which they refer and to rules by which they are assigned to these objects.”
— Albert Einstein, "Ernst Mach," Physikalische Zeitschrift, 17 (1916) as quoted by Peter C. Aichelburg, Roman U. Sexl, Albert Einstein: His Influence on Physics, Philosophy and Politics (2012) p. 117.
“Concepts can only acquire content when they are connected, however indirectly, with sensible experience. But no logical investigation can reveal this connection; it can only be experienced. ...this connection ...determines the cognitive value of systems of concepts.”
— Albert Einstein, "The Problem of Space, Ether, and the Field in Physics," Mein Weltbild, Amsterdam: Querido Verlag (1934) in Ideas and Opinions (1954)
“All concepts, even those which are closest to experience, are from the point of view of logic freely chosen conventions.”
— Albert Einstein, "Autobiographical notes" in Albert Einstein: Philosopher-scientist, The Library of Living Philosophers (1949) p.13.
“Often it is only after immense intellectual effort, which may have continued over centuries, that humanity at last succeeds in achieving knowledge of a concept in its pure form, by stripping off the irrelevant accretions which veil it from the eye of the mind.”
— Gottlob Frege, Grundgesetze der Arithmetik (1893); Tr. J. L. Austin as The Foundations of Arithmetic (Oxford, 1950); as quoted by , Human Understanding: The Collective Use and Evolution of Concepts (1972) Vol. 1, p. 56.
“Kant says that concept without percepts are empty, percepts without concepts are blind; it would perhaps be truer to say that concepts and percepts are inseparable; and if torn asunder, they are nothing.”
— Max Müller, "On the Orgin of Reason," The Popular Science Monthly (1878) p. 548.

Quotes via Wikiquote (CC BY-SA), each with its original source.

Overview

From Wikipedia (CC BY-SA 4.0).

concept

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concept

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concept across IJR

Overview

Notable quotes

Notable quotes

Overview

concept across IJR