class Byebug::WhereCommand

# File lib/byebug/commands/where.rb, line 20
    def self.description
      <<-DESCRIPTION
        w[here]|bt|backtrace[ maximum-frame]

        #{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.

        Without an argument, the command prints all the frames. With an argument,
        the command prints the nth first frames, where n is the largest between
        the argument or the maximum stack frame.
      DESCRIPTION
    end

# File lib/byebug/commands/where.rb, line 16
def self.regexp
  /^\s* (?:w(?:here)?|bt|backtrace) (?:\s+(\S+))? \s*$/x
end

# File lib/byebug/commands/where.rb, line 39
def self.short_description
  "Displays the backtrace"
end

# File lib/byebug/commands/where.rb, line 43
def execute
  print_backtrace
end

# File lib/byebug/commands/where.rb, line 49
def print_backtrace
  max_frame =
    if @match[1] && @match[1].to_i <= context.stack_size
      @match[1].to_i
    else
      context.stack_size
    end

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

  print(bt)
end