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Showing content from https://ruby-syntax-tree.github.io/syntax_tree/SyntaxTree/Kw.html below:

class SyntaxTree::Kw - RDoc Documentation

1. SyntaxTree::
2. Kw

Kw represents the use of a keyword. It can be almost anywhere in the syntax tree, so you end up seeing it quite a lot.

if value
end

In the above example, there would be two Kw nodes: one for the if and one for the end. Note that anything that matches the list of keywords in Ruby will use a Kw, so if you use a keyword in a symbol literal for instance:

:if

then the contents of the symbol node will contain a Kw node.

Symbol

the symbol version of the value

String

the value of the keyword

def initialize(value:, location:)
  @value = value
  @name = value.to_sym
  @location = location
  @comments = []
end

def ===(other)
  other.is_a?(Kw) && value === other.value
end

def accept(visitor)
  visitor.visit_kw(self)
end

def copy(value: nil, location: nil)
  node =
    Kw.new(value: value || self.value, location: location || self.location)

  node.comments.concat(comments.map(&:copy))
  node
end

def deconstruct_keys(_keys)
  { value: value, location: location, comments: comments }
end

def format(q)
  q.text(value)
end

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