sonic-pi

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

C++

Code. Music. Live.

Parslet::Pattern#match

Decides if the given subtree matches this pattern. Returns the bindings
made on a successful match or nil if the match fails. If you specify 
bindings to be a hash, the mappings in it will be treated like bindings
made during an attempted match. 

  Pattern.new('a').match('a', :foo => 'bar') # => { :foo => 'bar' }

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/pattern.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Parslet--Pattern-match-for-pr

# Commit to git

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

# 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--Pattern-match-for-pr

hub pull-request

# Celebrate!