JSON::Lisp
Execute lisp-like s-expressions written in JSON.
The aim of JSON-Lisp is to allow for an executable code format that is simple and portable, as well as easy to parse and execute in a controlled, sandboxed environment. This allows it to be stored in a database, sent over an HTTP connection, collected from user input, and executed on either a client or a server's machine.
Installation
Add this line to your application's Gemfile:
gem 'json-lisp'
And then execute:
$ bundle
Or install it yourself as:
$ gem install json-lisp
Usage
constants = {
"a" => 5,
"b" => 7,
"+" => -> (a, b) { a + b },
"-" => -> (a, b) { a - b }
}
json_lisp_env = JSON::Lisp::Env.new(constants)
json_lisp_env.evaluate(["+", "a", "b"])
json_lisp_env.evaluate(["-", "a", 3])
json_lisp_env.evaluate(["+", 2, "b"])
json_lisp_env.evaluate(["+", "a", ["-", "b", 2]])
json_lisp_env.evaluate_json('["+", "a", ["-", "b", 2]]')
See Also
- JSON Lisp for JavaScript
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 tags, and push the .gem
file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/jellymann/json-lisp-ruby.
License
The gem is available as open source under the terms of the MIT License.