Class: Cond::CondPrivate::Defaults

Inherits:
Object
  • Object
show all
Defined in:
lib/cond/cond_private/defaults.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Defaults

Returns a new instance of Defaults.



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# File 'lib/cond/cond_private/defaults.rb', line 8

def initialize
  @stream_in = STDIN
  @stream_out = STDERR
end

Instance Attribute Details

#stream_in ⇒ Object

Returns the value of attribute stream_in.



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# File 'lib/cond/cond_private/defaults.rb', line 13

def stream_in
  @stream_in
end

#stream_out ⇒ Object

Returns the value of attribute stream_out.



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# File 'lib/cond/cond_private/defaults.rb', line 13

def stream_out
  @stream_out
end

Instance Method Details

#handler(exception) ⇒ Object 



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# File 'lib/cond/cond_private/defaults.rb', line 21

def handler(exception)
  stream_out.puts exception.backtrace.last

  if exception.respond_to? :message
    stream_out.puts exception.message, ""
  end
    
  #
  # Show restarts in the order they appear on the stack (via
  # partial differences).
  #
  # grr:
  #
  #   % ruby186 -ve 'p({:x => 33}.eql?({:x => 33}))'
  #   ruby 1.8.6 (2009-03-10 patchlevel 362) [i686-darwin9.6.0]
  #   false
  #
  #   % ruby187 -ve 'p({:x => 33}.eql?({:x => 33}))'
  #   ruby 1.8.7 (2009-03-09 patchlevel 150) [i686-darwin9.6.0]
  #   true
  #
  stack_arrays = Cond.restarts_stack.map { |level|
    level.to_a.sort_by { |t| t.first.to_s }
  }
  restart_names = stack_arrays.to_enum(:each_with_index).map {
    |level, index|
    if index == 0
      level
    else
      level - stack_arrays[index - 1]
    end
  }.map { |level| level.map { |t| t.first } }.flatten

  restart_index = loop {
    restart_names.each_with_index { |name, index|
      func = Cond.available_restarts[name]
      message = (
        if func.respond_to?(:message) and func.message != ""
          func.message + " "
        else
          ""
        end
      )
      stream_out.printf("%3d: %s(%s)\n", index, message, name.inspect)
    }
    stream_out.print "Choose number: "
    stream_out.flush
    input = stream_in.readline.strip
    if input =~ %r!\A\d+\Z! and
        (0...restart_names.size).include?(input.to_i)
      break input.to_i
    end
  }
  Cond.invoke_restart(restart_names[restart_index])
end

#handlers ⇒ Object 



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# File 'lib/cond/cond_private/defaults.rb', line 15

def handlers
  {
    Exception => method(:handler)
  }
end