rubocop

https://github.com/bbatsov/rubocop

Ruby

A Ruby static code analyzer, based on the community Ruby style guide.

RuboCop::NodePattern::Macros#def_node_matcher

Define a method which applies a pattern to an AST node

The new method will return nil if the node does not match
If the node matches, and a block is provided, the new method will
yield to the block (passing any captures as block arguments).
If the node matches, and no block is provided, the new method will
return the captures, or `true` if there were none.

Source | Google | Stack overflow

Edit

git clone [email protected]:bbatsov/rubocop.git

cd rubocop

open lib/rubocop/node_pattern.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-RuboCop--NodePattern--Macros-def_node_matcher-for-pr

# Commit to git

git add lib/rubocop/node_pattern.rbgit commit -m "better docs for RuboCop::NodePattern::Macros#def_node_matcher"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-RuboCop--NodePattern--Macros-def_node_matcher-for-pr

hub pull-request

# Celebrate!