class SyntaxTree::Parser

def on_ensure(statements)

on_ensure: (Statements statements) -> Ensure
:call-seq: 
def on_ensure(statements)
  keyword = consume_keyword(:ensure)
  # We don't want to consume the :@kw event, because that would break
  # def..ensure..end chains.
  ending = find_keyword(:end)
  start_char = find_next_statement_start(keyword.location.end_char)
  statements.bind(
    self,
    start_char,
    start_char - line_counts[keyword.location.start_line - 1].start,
    ending.location.start_char,
    ending.location.start_column
  )
  Ensure.new(
    keyword: keyword,
    statements: statements,
    location: keyword.location.to(ending.location)
  )
end