lib/ruby-1.9.1-rc1/lib/irb/workspace.rb

   1 #
   2 #   irb/workspace-binding.rb -
   3 #       $Release Version: 0.9.5$
   4 #       $Revision: 15689 $
   5 #       by Keiju ISHITSUKA(keiju@ruby-lang.org)
   6 #
   7 # --
   8 #
   9 #
  10 #
  11 module IRB
  12   class WorkSpace
  13     # create new workspace. set self to main if specified, otherwise
  14     # inherit main from TOPLEVEL_BINDING.
  15     def initialize(*main)
  16       if main[0].kind_of?(Binding)
  17         @binding = main.shift
  18       elsif IRB.conf[:SINGLE_IRB]
  19         @binding = TOPLEVEL_BINDING
  20       else
  21         case IRB.conf[:CONTEXT_MODE]
  22         when 0  # binding in proc on TOPLEVEL_BINDING
  23           @binding = eval("proc{binding}.call",
  24                       TOPLEVEL_BINDING,
  25                       __FILE__,
  26                       __LINE__)
  27         when 1  # binding in loaded file
  28           require "tempfile"
  29           f = Tempfile.open("irb-binding")
  30           f.print <<EOF
  31           $binding = binding
  32 EOF
  33           f.close
  34           load f.path
  35           @binding = $binding
  36
  37         when 2  # binding in loaded file(thread use)
  38           unless defined? BINDING_QUEUE
  39             require "thread"
  40
  41             IRB.const_set("BINDING_QUEUE", SizedQueue.new(1))
  42             Thread.abort_on_exception = true
  43             Thread.start do
  44               eval "require \"irb/ws-for-case-2\"", TOPLEVEL_BINDING, __FILE__, __LINE__
  45             end
  46             Thread.pass
  47           end
  48           @binding = BINDING_QUEUE.pop
  49
  50         when 3  # binging in function on TOPLEVEL_BINDING(default)
  51           @binding = eval("def irb_binding; binding; end; irb_binding",
  52                       TOPLEVEL_BINDING,
  53                       __FILE__,
  54                       __LINE__ - 3)
  55         end
  56       end
  57       if main.empty?
  58         @main = eval("self", @binding)
  59       else
  60         @main = main[0]
  61         IRB.conf[:__MAIN__] = @main
  62         case @main
  63         when Module
  64           @binding = eval("IRB.conf[:__MAIN__].module_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  65         else
  66           begin
  67             @binding = eval("IRB.conf[:__MAIN__].instance_eval('binding', __FILE__, __LINE__)", @binding, __FILE__, __LINE__)
  68           rescue TypeError
  69             IRB.fail CantChangeBinding, @main.inspect
  70           end
  71         end
  72       end
  73       eval("_=nil", @binding)
  74     end
  75
  76     attr_reader :binding
  77     attr_reader :main
  78
  79     def evaluate(context, statements, file = __FILE__, line = __LINE__)
  80       eval(statements, @binding, file, line)
  81     end
  82
  83     # error message manipulator
  84     def filter_backtrace(bt)
  85       case IRB.conf[:CONTEXT_MODE]
  86       when 0
  87         return nil if bt =~ /\(irb_local_binding\)/
  88       when 1
  89         if(bt =~ %r!/tmp/irb-binding! or
  90            bt =~ %r!irb/.*\.rb! or
  91            bt =~ /irb\.rb/)
  92           return nil
  93         end
  94       when 2
  95         return nil if bt =~ /irb\/.*\.rb/
  96         return nil if bt =~ /irb\.rb/
  97       when 3
  98         return nil if bt =~ /irb\/.*\.rb/
  99         return nil if bt =~ /irb\.rb/
 100         bt.sub!(/:\s*in `irb_binding'/, '')
 101       end
 102       bt
 103     end
 104
 105     def IRB.delete_caller
 106     end
 107   end
 108 end