Download Logtalk 3.53.0

Logtalk compiler and runtime
- CHANGED: The clause/3 method support to allow the first two arguments to be unbound if the third argument is bound as per the de facto standard.
- CHANGED: Shorter warning message when a possibly incompatible backend Prolog compiler version is detected.
- ADDED: Support for using object aliases in the message delegation control construct.
- IMPROVED: Simplified folding of left unifications when compiling clauses in optimized mode.

Prolog adapter and integration files
- ADDED: GNU Prolog adapter file support for inlining calls to foreign predicates.
- UPDATED: The GNU Prolog adapter file table of proprietary predicate properties.
- UPDATED: The LVM adapter file to require version 3.0.0 or later.
- UPDATED: The SWI-Prolog adapter file tables of proprietary predicate properties and candidate tautology and falsehood goals.
- UPDATED: The Trealla Prolog adapter file to require version 1.20.12 or later.
- UPDATED: The Trealla adapter file table of candidate tautology and falsehood goals.
- FIXED: Skipping of discontiguous predicate clauses warnings in the SICStus Prolog adapter file.
- FIXED: Override the meta-predicate template for the current_op/3 built-in predicate in the SWI-Prolog adapter file.

Documentation
- ADDED: Handbook section on calling Prolog foreign predicates.
- IMPROVED: Documentation of the options library.
- IMPROVED: Documentation of the logtalk_tester automation script.
- IMPROVED: Documentation of the phrase//1 built-in method.
- FIXED: Sidebar links between the Handbook and the APIs from pages other than the root pages.

Library
- ADDED: Predicates option/2-3 to the options library.
- ADDED: Support to the timeout library for the Trealla Prolog backend.
- IMPROVED: Tests driver files for the arbitrary and random libraries to avoid reloading of files and and to explicit clean up intermediate files for the code being tested.
- UPDATED: The dif and coroutining libraries for use with the LVM and Trealla Prolog backends.
- UPDATED: The os library for fixes in the upcoming SICStus Prolog 4.7.1 version.
- FIXED: The timeout library for the YAP backend.
- FIXED: Deleted unused predicate in the git library.
- FIXED: The intervals library f/2 shortcut for the finishes/2 predicate.

Tools
- CHANGED: The packs tool delete commands on Windows to use the force option.
- ADDED: New experimental tool, issue_creator, for automatically creating bug report issues for failed tests in GitHub or GitLab servers.
- ADDED: Command-line option to the logtalk_tester script to setup and use the new issue_creator tool.
- IMPROVED: The packs tool handling of deleted registries.
- UPDATED: Added git command to the requirements list for the packs tool.
- UPDATED: The diagrams, lgtdoc, and packs tools to use the options library option/2 predicate.
- UPDATED: The help tool to use the atomic_list_concat/2 predicate.
- FIXED: The lgtunit tool error message for a failed test step.

Ports
- CHANGED: The metagol port to skip three long running tests when the tests are run automated.
- UPDATED: The metagol port to run when using LVM as the backend compiler.
- FIXED: Workaround Metagol port find_duplicate example portability issue to avoid failures when run on backends that type-check the second argument of the msort/2 predicate.

Examples
- UPDATED: The attvars example tests to use explicit assertions.
- UPDATED: The figures example to run using the LVM and Trealla Prolog backends.

Tests
- CHANGED: Tests for Logtalk settings file to avoid issues with some backends where reloading files can be problematic.
- ADDED: Additional test for the standard throw/1 control construct when the exception term is a cyclic term.
- ADDED: Tests for invalid quoted atoms that contain layout characters.
- ADDED: Tests for invalid double-quoted terms that contain layout characters.
- ADDED: Tests for the Prolog lsb/1 and msb/1 built-in functions when available.
- ADDED: Additional tests for the standard term comparison, bagof/3, compare/3, copy_term/2, findall/3, ground/1, length/2, numbervars/3, setof/3, and subsumes_term/2 predicates with cyclic term arguments.
- ADDED: Additional tests for the standard get_byte/1-2, get_char/1-2, get_code/1-2, open/4, put_byte/1-2, put_char/1-2, put_code/1-2, sort/2, and write_term/3 predicates.
- ADDED: Additional tests for the de facto standard predicate_property/2 and msort/2 predicates.
- ADDED: Test set for the de facto standard Prolog built-in predicates that take a clause reference argument.
- ADDED: Additional tests for the database built-in methods that take a clause reference argument.
- IMPROVED: Simplify the tests driver file for the Logtalk use_module/2 directive.
- UPDATED: The tests for the length/2 predicate to also check the Ciao Prolog library definition of the predicate.

IDEs, text editors, and syntax highlighters support
- ADDED: Experimental vscode_message_streamer category for supporting the new version of the Visual Studio Code text editor Logtalk plug-in. Contributed by Jacob Friedman.

Installers and installation scripts
- ADDED: Trealla Prolog embedding script.