Class: IRB::WorkSpace

Inherits:
Object show all
Defined in:
lib/irb/workspace.rb,
lib/irb/ext/tracer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*main) ⇒ WorkSpace

Creates a new workspace.

set self to main if specified, otherwise inherit main from TOPLEVEL_BINDING.


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# File 'lib/irb/workspace.rb', line 17

def initialize(*main)
  if main[0].kind_of?(Binding)
	@binding = main.shift
  elsif IRB.conf[:SINGLE_IRB]
	@binding = TOPLEVEL_BINDING
  else
	case IRB.conf[:CONTEXT_MODE]
	when 0	# binding in proc on TOPLEVEL_BINDING
	  @binding = eval("proc{binding}.call",
    TOPLEVEL_BINDING,
    __FILE__,
    __LINE__)
	when 1	# binding in loaded file
	  require "tempfile"
	  f = Tempfile.open("irb-binding")
	  f.print <<EOF
	  $binding = binding
EOF
	  f.close
	  load f.path
	  @binding = $binding

	when 2	# binding in loaded file(thread use)
	  unless defined? BINDING_QUEUE
 require "thread"

 IRB.const_set(:BINDING_QUEUE, SizedQueue.new(1))
 Thread.abort_on_exception = true
 Thread.start do
   eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__
 end
 Thread.pass
	  end
	  @binding = BINDING_QUEUE.pop

	when 3	# binging in function on TOPLEVEL_BINDING(default)
	  @binding = eval("def irb_binding; private; binding; end; irb_binding",
    TOPLEVEL_BINDING,
    __FILE__,
    __LINE__ - 3)
	end
  end
  if main.empty?
	@main = eval("self", @binding)
  else
	@main = main[0]
	IRB.conf[:__MAIN__] = @main
	case @main
	when Module
	  @binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
	else
	  begin
 @binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
	  rescue TypeError
 IRB.fail CantChangeBinding, @main.inspect
	  end
	end
  end
  eval("_=nil", @binding)
end

Instance Attribute Details

#bindingObject (readonly)

The Binding of this workspace


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# File 'lib/irb/workspace.rb', line 79

def binding
  @binding
end

#mainObject (readonly)

The top-level workspace of this context, also available as IRB.conf[:__MAIN__]


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# File 'lib/irb/workspace.rb', line 82

def main
  @main
end

Instance Method Details

#__evaluate__Object

Evaluate the given statements within the context of this workspace.


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# File 'lib/irb/ext/tracer.rb', line 50

def evaluate(context, statements, file = __FILE__, line = __LINE__)
  eval(statements, @binding, file, line)
end

#evaluate(context, statements, file = nil, line = nil) ⇒ Object

Evaluate the context of this workspace and use the Tracer library to output the exact lines of code are being executed in chronological order.

See lib/tracer.rb for more information.


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# File 'lib/irb/workspace.rb', line 85

def evaluate(context, statements, file = __FILE__, line = __LINE__)
  eval(statements, @binding, file, line)
end

#filter_backtrace(bt) ⇒ Object

error message manipulator


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# File 'lib/irb/workspace.rb', line 90

def filter_backtrace(bt)
  case IRB.conf[:CONTEXT_MODE]
  when 0
	return nil if bt =~ /\(irb_local_binding\)/
  when 1
	if(bt =~ %r!/tmp/irb-binding! or
bt =~ %r!irb/.*\.rb! or
bt =~ /irb\.rb/)
	  return nil
	end
  when 2
	return nil if bt =~ /irb\/.*\.rb/
	return nil if bt =~ /irb\.rb/
  when 3
	return nil if bt =~ /irb\/.*\.rb/
	return nil if bt =~ /irb\.rb/
	bt = bt.sub(/:\s*in `irb_binding'/, '')
  end
  bt
end