Castor : Logic paradigm for C++
Traditional approach to problem solving with
computers is all about instructing the computer exactly how to solve the problem.
This is called the Imperative paradigm and is based on the
Turing machine. Languages such as C, C++, Java, Fortran etc. are all rooted in
this paradigm.
The Logic paradigm (LP) is a declarative
programming model. Instead of instructing the computer how to solve a particular problem, we
describe the problem domain as facts and rules. Using the problem domain
description, the computer figures out how to solve specific problems within that
domain. Once the domain has been described, many different problems within that
domain can be solved without additional code. Describing the problem domain
and the specific problems that need to be solved are tasks for a programmer.
Logic programming is one approach in computer
science towards what is sometimes referred to as the Holy Grail of programming:
"The user states the problem, the computer solves it".
Prolog is the best known programming language that
supports logic programming. The computational model underlying LP is rooted in
Predicate calculus. This is analogous to the Turing machine which is the
computational model for the imperative paradigm.
Castor is a small pure C++, all header library.
It seamlessly integrates LP with the other
programming paradigms supported by C++ such as OOP, generic programming,
imperative etc. Blending LP into C++ enables new designs and programming
techniques that are not available to purely LP approaches or pure OO approaches,
but only feasible within a multiparadigm blend. A key design goal of Castor is
to smoothly and efficiently blend Logic into the rest of C++ with minimal
syntactic overhead.
is now available. The primary focus of v1.1 is to enrich Castor's support for
general purpose programming and enable query expressions.
Here is comprehensive list of new features.
See the video covering the new features.
Castor is distributed under the
MIT license.
Send your questions, feedback and technical contributions to
roshan AT mpprogramming DOT c o m.
Also available:
.
Documentation :
- Get started with this
to Logic Programming
in C++ (draft). Also available in
French.
- for Castor.
- (revised on Feb 24th '08) : describes how support
for LP is provided using only a few lines of C++.
Videos:
Introduction to LP in C++ (using Castor 1.0)
[
フレーム]
Castor 1.1 - New features (Part 1 of 2) : Features continuing to evolve from 1.0.
[
フレーム]
Castor 1.1 - New features (Part 2 of 2) : Brand new stuff. TLRs, Coroutines, Query Expressions
and examples.
[
フレーム]
Past Talks :
BoostCon 2010
May 2010. See session
info.
At
SD West : March 2009. See session
info.
Logic Paradigm for C++ at SD West 2008: at SD West 2008:
See session
details.
Northwest C++ Users Group
April 16, 2008
Redmond, WA
90 min session on Logic Paradigm for C++ :
Open to public! Bring Your own OBjects (BYOB) and logic will be provided
in this 90 minute talk on general purpose declarative programming with the Logic paradigm (LP). In this code centric
presentation, Roshan Naik takes you through the basics of LP, LP with Castor and Multiparadigm programming.
See session
details.
::: Headlines :::
NEW! Videos on 1.1
See the two part
video tutorial covering the new features in 1.1 with examples.
Understand the concepts behind LP, how to represent them in C++ and how LP blends
with the other paradigms in C++.
Discuss issues, collaborate, consider improvements, share code etc.