class Byebug::WhereCommand

def self.description
  <<-DESCRIPTION
    w[here]|bt|backtrace
    #{short_description}
    Print the entire stack frame. Each frame is numbered; the most recent
    frame is 0. A frame number can be referred to in the "frame" command.
    "up" and "down" add or subtract respectively to frame numbers shown.
    The position of the current frame is marked with -->. C-frames hang
    from their most immediate Ruby frame to indicate that they are not
    navigable.
  DESCRIPTION
end

def self.regexp
  /^\s* (?:w(?:here)?|bt|backtrace) \s*$/x
end

def self.short_description
  "Displays the backtrace"
end

def execute
  print_backtrace
end

def print_backtrace
  bt = prc("frame.line", (0...context.stack_size)) do |_, index|
    Frame.new(context, index).to_hash
  end
  print(bt)
end