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Class: DEBUGGER__::WatchIVarBreakpoint

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Breakpoint
Instance Chain:
self, Breakpoint, Color, SkipPathHelper
Inherits: DEBUGGER__::Breakpoint
Defined in: lib/debug/breakpoint.rb

Class Method Summary

Breakpoint - Inherited

.new

Instance Attribute Summary

Breakpoint - Inherited

#deleted?, #duplicable?, #enabled?, #key, #oneshot?, #skip_src

Instance Method Summary

Breakpoint - Inherited

#delete, #description, #disable, #enable, #generate_label, #safe_eval, #setup, #skip_path?, #suspend, #to_s

Color - Included

#color_pp

See additional method definition at line 50.
#colored_inspect,
#colorize

See additional method definition at line 36.
#colorize_blue,
#colorize_code

See additional method definition at line 79.
#colorize_cyan, #colorize_dim, #colorize_magenta,
#irb_colorize

See additional method definition at line 27.
#with_inspection_error_guard

SkipPathHelper - Included

#skip_config_skip_path?, #skip_internal_path?, #skip_location?, #skip_path?

Constructor Details

.new(ivar, object, current, cond: nil, command: nil, path: nil) ⇒ WatchIVarBreakpoint

[ GitHub ] 

  


# File 'lib/debug/breakpoint.rb', line 382



def initialize ivar, object, current, cond: nil, command: nil, path: nil
  @ivar = ivar.to_sym
  @object = object
  @key = [:watch, object.object_id, @ivar].freeze

  @current = current

  super(cond, command, path)
end


  







Instance Method Details



  

    #setup  
  

  [ GitHub ]


  

  


# File 'lib/debug/breakpoint.rb', line 410



def setup
  @tp = TracePoint.new(:line, :return, :b_return){|tp|
    watch_eval(tp)
  }
end


  








  

    #to_s  
  

  [ GitHub ]


  

  


# File 'lib/debug/breakpoint.rb', line 416



def to_s
  value_str =
    if defined?(@prev)
      "#{@prev} -> #{@current}"
    else
      "#{@current}"
    end
  "#{generate_label("Watch")} #{@object} #{@ivar} = #{value_str}"
end


  








  

    #watch_eval(tp)  
  

  [ GitHub ]


  

  


# File 'lib/debug/breakpoint.rb', line 392



def watch_eval(tp)
  result = @object.instance_variable_get(@ivar)
  if result != @current
    begin
      @prev = @current
      @current = result

      if (@cond.nil? || @object.instance_eval(@cond)) && !skip_path?(tp.path)
        suspend
      end
    ensure
      remove_instance_variable(:@prev)
    end
  end
rescue Exception
  false
end