sexp2ruby

sexp2ruby generates ruby from ruby_parser S-expressions. It is a fork of ruby2ruby with different goals and tools.

• Follows ruby-style-guide where possible
• Prefers OO design over performance
• Drops support for ruby 1.8.7
• Uses bundler instead of hoe
• Uses rspec instead of minitest
• Depends on (a small subset of) activesupport

If you want to use the latest version of ruby_parser, please use ruby2ruby instead. Ryan does not often make breaking changes to his S-expression format, but when he does, ruby2ruby is more likely to keep up to date. Following the ruby-style-guide is not a goal of ruby2ruby, so you may want to use a tool like rubocop --auto-correct. In fact, rubocop's auto-correct is getting so good that it may not make sense to continue working on this project.

require 'ruby_parser'
require 'sexp2ruby'

ruby = "def a\n  puts 'A'\nend\n\ndef b\n  a\nend"
sexp = RubyParser.new.process(ruby)
# => s(:block, s(:defn, .. etc.

Sexp2Ruby::Processor.new.process(sexp.deep_clone)
# => "def a\n  puts(\"A\")\nend\ndef b\n  a\nend\n"

As with all SexpProcessors, Sexp2Ruby#process destroys its input, so deep_clone as shown above if you need to preserve it.

Configure output by passing options to Sexp2Ruby::Processor.new:

hash = s(:hash, s(:lit, :a), s(:lit, 1))
Sexp2Ruby::Processor.new(hash_syntax: :ruby18).process
# => "{ :a => 1 }"
Sexp2Ruby::Processor.new(hash_syntax: :ruby19).process
# => "{ a: 1 }"

• :hash_syntax - either :ruby18 or :ruby19. Default is :ruby19.
• :no_paren_methods - an array of symbols, these methods will omit argument parentheses. Default is [].