sonic-pi

https://github.com/sonic-pi-net/sonic-pi

C++

Code. Music. Live.

Parslet#sequence

Returns a placeholder for a tree transformation that will only match a
sequence of elements. The +symbol+ you specify will be the key for the
matched sequence in the returned dictionary.

  # This would match a body element that contains several declarations.
  { :body => sequence(:declarations) }

The above example would match <code>:body => ['a', 'b']</code>, but not
<code>:body => 'a'</code>. 

see {Parslet::Transform}

Source | Google | Stack overflow

Edit

git clone [email protected]:sonic-pi-net/sonic-pi.git

cd sonic-pi

open app/server/ruby/vendor/parslet/lib/parslet.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Parslet-sequence-for-pr

# Commit to git

git add app/server/ruby/vendor/parslet/lib/parslet.rbgit commit -m "better docs for Parslet#sequence"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Parslet-sequence-for-pr

hub pull-request

# Celebrate!