resttaylor.blogg.se - Logtalk programming language

#Logtalk programming language how to#
#Logtalk programming language full#
#Logtalk programming language code#

Happy about your progress? Time to celebrate with: Looking for extending Logtalk with your constructs? Logtalk supports a term-expansion mechanism (aka as macros): Now that you got the basics of OOP in Logtalk, time to take it to the next level:īut Logtalk is a declarative language supporting all those features that drive people to logic programming.

#Logtalk programming language how to#

Looking for how to express traditional OOP class concepts from other languages in Logtalk? See: Two good examples are:Īnother distinctive Logtalk feature is the support for event-driven programing. Logtalk support for composition using categories provides an alternative to inheritance. Want to learn about parametric objects (and categories)? See the following examples:

errors - learn about compiler errors and warnings.

Trouble understanding compiler output? Want to learn more about compilation errors and warnings? Load the tutor tool and then run the following example: The Logtalk compiler does extended lint checks.

adventure - text-based adventure games beware of the monsters!.

Need a break after playing with the above examples? Have fun with the following ones:

family - no self respecting logic programming language can do without a family relations example.

inheritance - learn about public, protected, and private inheritance.

predicate_lookups - learn about the predicate lookups used when sending a message to an object.

shapes - learn about the differences between class and prototype hierarchies.

carengines - learn more about categories.

planets - learn how to define and use protocols and categories.

self_vs_this - learn the difference between self and this.

closed_world_assumption - learn about the Closed World Assumption (CWA) semantics.

prototypes - another example on prototypes.

elephants - learn about the concept of prototypes ( videocast).

super_calls - learn how to use super calls to specialize inherited predicates.

self_messages - learn how to use messages to self to call redefined predicates.

roles - learn about the different roles that an object can play.

hello_world - mandatory example cannot be avoided.

for testing and documentation) can be automatically loaded To help new users trace query execution, also load the debugger tool at startup. To help new users understand and act on compiler and runtime warning and error messages, load the tutor tool at startup.

#Logtalk programming language code#

Being programming examples, it is expected that you run them side-by-side with the source code open in your favorite editor. Most examples also include a tests.lgt file with unit tests and a tester.lgt loader file to run them. TheĮxamples included are fully documented with source code comments and sampleĪll examples include a loader.lgt file that loads the example and any dependencies, a NOTES.md file with a description of the example, and a SCRIPT.txt file with sample queries (including how to load the example) for you to try. Programming examples that introduce most of the language features. The Logtalk distribution also includes a large number of well documented The reference manual, and the APIs documentation. Note that the Logtalk distribution includes HTML versions of the user manual, It is highly recommended that you start with the tutorial available at:Īlthough this short tutorial is a recommended starting point for new users for a quick overview, be aware that some of the examples will not work as-is in Logtalk 3.x (a pull request have been submitted). Basic knowledge of object-oriented programming also helps, specially if from a generalized, first principles, approach. Thus, a good knowledge of Prolog paves the way for a quick learning of Logtalk programming.

#Logtalk programming language full#

Its distribution uses a commercial friendly license and includes full documentation, portable libraries, a comprehensive set of portable developer tools, and a large number of programming examples to help get you started.Logtalk is a programming language that extends and subsumes Prolog. As a multi-paradigm language, it includes support for modules, prototypes, classes, protocols (interfaces), categories (components and hot patching), event-driven programming, and high-level multi-threading programming. Logtalk is implemented in highly portable code and can use most modern and standards compliant Prolog implementations as a back-end compiler. Logtalk supports modern code encapsulation and code reuse mechanisms without compromising the declarative programming features of Prolog. Logtalk is an object-oriented logic programming language that extends and leverages the Prolog language with a feature set suitable for programming in the large. Logtalk - Open source object-oriented logic programming language