Pascalina

Usage

TODO: ...

AST cache

Pascalina doesn't handle the AST cache like other alternatives, but you can cache it your-self and pass it with evaluate_ast.

Check the benchmark/ast.rb to see the usage:

Warming up --------------------------------------
            evaluate   634.000  i/100ms
marshal evaluate_ast     1.464k i/100ms
 direct evaluate_ast     1.595k i/100ms
Calculating -------------------------------------
            evaluate      5.783k (±14.2%) i/s -     29.164k in   5.146870s
marshal evaluate_ast     14.502k (±18.1%) i/s -     70.272k in   5.015046s
 direct evaluate_ast     22.910k (±19.1%) i/s -    106.865k in   5.046620s

Comparison:
 direct evaluate_ast:    22910.4 i/s
marshal evaluate_ast:    14502.0 i/s - 1.58x  (± 0.00) slower
            evaluate:     5782.7 i/s - 3.96x  (± 0.00) slower

Similar stuff

• keisan: A Ruby-based expression parser, evaluator, and programming language Topics
• dentaku: Math and logic formula parser and evaluator
• rlox: Ruby implementation of Lox, the language described in Crafting Interpreters
• stoffle: A toy programming language developed as a series of blog posts for the Honeybadger blog.

Installation

Add this line to your application's Gemfile:

gem 'pascalina'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install pascalina

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/ceritium/pascalina. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Pascalina project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.