Use Go To Definition in Atom

• install symbol-gen for Atom

• restart Atom, enter your project and hit “cmd-alt-g”

• add .tags to .gitignore

• enter settings and add .tags to the Ignored Names

• edit keybings of Atom:

  # add this to Atom's keymap.cson file:
  'atom-text-editor':
    'ctrl-alt-r': 'symbols-view:go-to-declaration'
  

Voila, click on a function, hit cmd-alt-r and jump the definition in a new tab