Logtalk

Logtalk is a programming language created in 1998 by Paulo Moura.

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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. It provides support for encapsulation and data hiding, separation of concerns and enhanced code reuse. Logtalk uses standard Prolog syntax with the addition of a few operators and directives. Read more on Wikipedia...

Logtalk website
Logtalk Wikipedia page
There are at least 65 Logtalk repos on GitHub
Logtalk first developed in https://github.com/LogtalkDotOrg
file extensions for Logtalk include lgt and logtalk
Logtalk on Twitter
The Google BigQuery Public Dataset GitHub snapshot shows 50 users using Logtalk in 52 repos on GitHub
Explore Logtalk snippets on Rosetta Code
Logtalk on HOPL
Pygments supports syntax highlighting for Logtalk
GitHub supports syntax highlighting for Logtalk
logtalk.org was registered in 2002
See also: (7 related languages)Prolog, Smalltalk, Objective-C, SWI Prolog, Mercury, Oz, Visual Prolog
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Example from hello-world:

write('Hello World')

Example from Linguist:

% this is a Logtalk source file

:- object(hello_world).

	% the initialization/1 directive argument is automatically executed
	% when the object is loaded into memory:
	:- initialization((nl, write('********** Hello World! **********'), nl)).

:- end_object.

Example from Wikipedia:

?- my_first_object::p2.
ERROR: error(permission_error(access, private_predicate, p2), my_first_object::p2, user)

Feature	Supported	Token	Example
Binary Literals	✓
Hexadecimals	✓
Octals	✓
Strings	✓	'	'Hello world'
Print() Debugging	✓	write
Multiple Inheritance	✓
Comments	✓
Semantic Indentation	X

Publications about Logtalk from Semantic Scholar

title	authors	year	citations	influentialCitations
High-Level Multi-threading Programming in Logtalk	Paulo Moura and P. Crocker and Paulo Nunes	2008	13	1
Programming Patterns for Logtalk Parametric Objects	Paulo Moura	2009	12	1
From Plain Prolog to Logtalk Objects: Effective Code Encapsulation and Reuse	Paulo Moura	2009	7	1
High Level Thread-Based Competitive Or-Parallelism in Logtalk	Paulo Moura and Ricardo Rocha and S. Madeira	2009	5	0

Logtalk - Programming language

Language features

Publications about Logtalk from Semantic Scholar