Class: MimickIRB

Inherits:
RubyLex
  • Object
show all
Defined in:
lib/wxirb.rb

Overview

This class is stolen almost verbatim from why_the_lucky_stiff’s Shoes example. (github.com/why/shoes/blob/master/samples/expert-irb.rb) He gets all the credit.

Defined Under Namespace

Classes: Continue, Empty

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bind = TOPLEVEL_BINDING) ⇒ MimickIRB

Returns a new instance of MimickIRB.



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# File 'lib/wxirb.rb', line 24

def initialize(bind=TOPLEVEL_BINDING)
  set_binding(bind)
  super()
  set_input(StringIO.new)
end

Instance Attribute Details

#started ⇒ Object

Returns the value of attribute started.



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# File 'lib/wxirb.rb', line 19

def started
  @started
end

Instance Method Details

#run(str) ⇒ Object 



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# File 'lib/wxirb.rb', line 42

def run(str)
  obj = nil
  @io << str
  @io.rewind
  unless l = lex
    raise Empty if @line == ''
  else
    case l.strip
    when "reset"
      @line = ""
    else
      @line << l << "\n"
      if @ltype or @continue or @indent > 0
        raise Continue
      end
    end
  end
  unless @line.empty?
    obj = eval @line, @bind, "(irb)", @line_no
  end
  @line_no += @line.scan(/\n/).length
  @line = ''
  @exp_line_no = @line_no
 
  @indent = 0
  @indent_stack = []
 
  $stdout.rewind
  output = $stdout.read
  $stdout.truncate(0)
  $stdout.rewind
  [output, obj]
rescue Object => e
  case e when Empty, Continue
  else @line = ""
  end
  raise e
ensure
  set_input(StringIO.new)
end

#set_binding(bind) ⇒ Object Also known as: change_binding, cb 



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# File 'lib/wxirb.rb', line 30

def set_binding(bind)
  if bind.is_a? Binding
    @bind = bind
  else
    @bind = bind.instance_eval { binding }
  end
end