Exercism Exercises in Prolog

See INSTALLATION.md

Thank you so much for contributing! 🎉

We welcome pull requests that provide fixes and improvements to existing exercises. If you're unsure, then go ahead and open a GitHub issue, and we'll discuss the change.

Please keep the following in mind:

• Please start by reading the general Exercism contributing guide.

• Pull requests should be focused on a single exercise, issue, or change.

• We welcome changes to code style, and wording. Please open a separate PR for these changes if possible.

• Please open an issue before creating a PR that makes significant (breaking) changes to an existing exercise or makes changes across many exercises. It is best to discuss these changes before doing the work.

• Watch out for trailing spaces, extra blank lines, and spaces in blank lines.

• Each exercise must stand on its own. Do not reference files outside the exercise directory. They will not be included when the user fetches the exercise.

• Please do not add a README or README.md file to the exercise directory. The READMEs are constructed using shared metadata, which lives in the exercism/x-common repository.

• Each problem should have a test suite, an example solution, and a template file for the real implementation. The example solution should have the .example.pl file extension.

• Each test file should have code like the following at the top of the file. This allows the tests to be run on CI and configures tests to be skipped with the condition(pending) flag.

pending :-
    current_prolog_flag(argv, ['--all'|_]).
pending :-
    write('\nA TEST IS PENDING!\n'),
    fail.

• All but the initial test for each exercise should becondition(pending). The first test should have condition(true) as an example of how to change the tests to run. Here are the first two tests in the hello_world exercise.

test(hello_world, condition(true)) :-
    hello_world('Hello World!').

test(hello_world_with_a_name, condition(pending)) :-
    hello_world('Alice', 'Hello Alice!').

All the tests for Exercism Prolog Track exercises can be run from the top level of the repo with bin/build.sh. Please run this command before submitting your PR.

The SWI Prolog "Owlie" logo is owned by the SWI Prolog maintainers and released under the Simplified BSD license. We have adapted it for use on Exercism, changing the colour scheme, with the express permission of anne@swiprolog.org.