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•   Functors to encapsulate C and C++ Function Pointers.
•   Functors to encapsulate C and C++ Function Pointers.
• 1  What are Functors ?.
• 2  How to Implement Functors ?.
• 3  Example of How to Use Functors.
• 1  What are Functors ?.
• Functors are functions with a state. ... Functors can encapsulate C and C++ function pointers employing the concepts templates and polymorphism. ... Sometimes functors are also known as closures. You can also use functors to implement callbacks.
• 2  How to Implement Functors ?.
• 2 How to Implement Functors // abstract base class class TFunctor { public: // two possible functions to call member function. ... 3  Example of How to Use Functors.
• 3 Example of How to Use Functors // dummy class A class TClassA{ public: TClassA(){}; void Display(const char* text) { cout << text << endl; }; /* more of TClassA */ }; // dummy class B class TClassB{ public: TClassB(){}; void Display(const char* text) { cout << text << endl; }; /* more of TClassB */ }; // main program int main(int /*argc*/, char* /*argv */) { // 1. ...
• You can download a Postscript or a PDF of the tutorials about Function Pointers, Callbacks and Functors!.
• Vous pouvez télécharger une version Postscript ou PDF de ce turoriel sur les pointeurs de fonctions, les fonction de rappel et les functors!.

• Dimension Theory and Group Valued Functors.
• It shows that arbitrary group and coset valued functors define in a natural way notions of structure and dimension on their source categories and that this data predicts group theoretic properties of the functors over finite dimensional objects, such as solvability, nilpotence, or normality of subfunctors. ...

• Date Prev Date Next Thread Prev Thread Next Date Index Thread Index categories: Re: Time for functors to grow up; three queries.
• Subject: categories: Re: Time for functors to grow up; three queries .
• Functors between categories are exactly simplicial maps and are face preserving, (f,h,g) goes to (F(f),F(h),F(g)), but then F(h)=F(f)F(g) and composition must be preserved on the nose if the target is a category, but need not be if the target were a bicategory! Jack .
• Prev by Date: categories: Re: Time for functors to grow up; three queries .
• Next by Date: categories: Re: Time for functors to grow up; three queries .
• Previous by thread: categories: Re: Time for functors to grow up; three queries .
• Next by thread: categories: Re: Time for functors to grow up; three queries" .

• Main Page | Modules | Namespace List | Class Hierarchy | Class List | File List | Namespace Members | Class Members | Related Pages | Examples Allocation functors.
• Standard allocation strategies incapsulated in functors Generated on Wed Mar 2 17:16:04 2005 for Stxxl by 1. ...

• Miscellaneous Facts about Functors .
• In the paper we show useful facts concerning reverse and inclusion functors and the restriction of functors. We also introduce a new notation for the intersection of categories and the isomorphism under arbitrary functors. ...
• Reverse Functors.
• Inclusion Functors and Functor Restrictions.
• The composition of functors and transformations in alternative categories. ... Functors for alternative categories. ...

• Functors to Combine Images .
• Common functors with several arguments .

• Universal Quotients of Functors.
• We will see that on each "concretely" universal category there exists a (concretely) universal concrete functor F : (A, U) --> (A, U) and a congruence ~ such that F/ ~ is universal for faithful functors. ...

• Prev Next Index Thread Re: Monads, Functors and typeclasses.
• Subject: Re: Monads, Functors and typeclasses .
• Does that make us mathematicians? What does >that imply? What is the cause of that? > What I am trying to say is that it would appear that to make effective use of the Haskell class structure vis-a-vis monads, one needs to know about several category theoretical concepts in addition to monads themselves, Functors, Monoids and Kleisli multiplication. ...
• Next: Re: Monads, Functors and typeclasses .

• Haskell Applicative translucent functors in Haskell.
• To get the OCaml code, please filter the text of the message with "sed -n -e '/^}/ s/^} //p'" > {-# OPTIONS -fglasgow-exts #-} > module Functors where Our goal in this message is to produce implementations of a SET interface: } module type SET = sig } type element } type set } val empty : set } val add : element -> set -> set } val member : element -> set -> bool } end;; This is the OCaml declaration of a type of a collection made of two type declarations and three value declarations. ... Thus our game plan is: - introduce the ENUM interface, - define two implementations of the ENUM interface, - introduce two different ENUM->ORD transparent functors, - instantiate the functors yielding four implementations of the ORD interface, - introduce a translucent ORD->SET applicative functor, - instantiate it obtaining different implementations of SET - run a few tests, to illustrate applicativity of the functor and the abstraction barrier We start with the ENUM interface: } module type ENUM = sig } type e } val fromEnum: e -> int } end;; and its two implementations. ... The two Haskell instances above are actually parameterized implementations -- that is, functors -- parameterized by Enum. ... Both functors are applicative, so that Set1 and Set2 are type compatible. ... The upshot of the translation: ML signatures correspond to Haskell type classes, and their implementations to the instances Abstract types in ML correspond to either uninstantiated or explicitly quantified type variables in Haskell Type sharing is expressed via type variable name sharing Functor (signatures or structures) correspond to Haskell (class declarations or instances) with type class constraints The argument of functors is expressed via types, with additional labels when needed for finer differentiation Functor applications are done by instance selection based on types at hand plus the additional labels OCaml signature attribution operation -- casting the module or the result of the functor into a desired signature and hiding the extras -- sometimes involves additional tagging/untagging tricks (cf. ...

• Some functors related to polynomial theory. ...
• PROSZYNSKI, Some functors related to polynomial theory, Fundamenta Math. ...

• Coxeter Functors and Gabriel's Theorem .
• Abstract: In a paper entitled "Coxeter Functors and Gabriel's Theorem," I. ...

• 2 Functors as abstract datatypes.
• Functors are abstract datatypes that are concretely realized using chunks. In order to be able to safely distinguish functors from other chunks, a special feature is added to the representation: a chunk is a functor iff it has this feature. ...

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