ErrorHighlight::Spotter#spot_opcall_for_name

# File tmp/rubies/ruby-4.1.0-preview1/lib/error_highlight/base.rb, line 487
def spot_opcall_for_name
  nd_recv, op, nd_arg = @node.children
  fetch_line(nd_recv.last_lineno)
  if nd_arg
    # binary operator
    if @snippet.match(/\G[\s)]*(#{ Regexp.quote(op) })/, nd_recv.last_column)
      @beg_column = $~.begin(1)
      @end_column = $~.end(1)
    end
  else
    # unary operator
    if @snippet[...nd_recv.first_column].match(/(#{ Regexp.quote(op.to_s.sub(/@\z/, "")) })\s*\(?\s*\z/)
      @beg_column = $~.begin(1)
      @end_column = $~.end(1)
    end
  end
end